Benchmark 2021-B31 Mortgage Trust

04/30/2024 | Press release | Distributed by Public on 04/30/2024 10:58

Asset-Backed Issuer Distribution Report - Form 10-D


Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
STATEMENT TO NOTEHOLDERS
April 17, 2024
TRANSACTION PARTIES
Depositor: Citigroup Commercial Mortgage Securities Inc.
Master Servicer: Midland Loan Services, a Division of PNC Bank N.A.
Special Servicer: Rialto Capital Advisors, LLC
Asset Representations Reviewer /
Pentalpha Surveillance LLC.
Operating Advisor:
Trustee: Wilmington Trust, National Association
Certificate Administrator: Citibank, N.A.
Danny Lee Citibank, Agency and Trust
(212) 816-4936 388 Greenwich Street Trading, 4th Floor
[email protected] New York, NY 10013
TABLE OF CONTENTS
1 . Distribution Summary 2
1.1 . Summary 2
1.2 . Factors 3
1.3 . Interest Detail 4
1.4 . Interest Shortfall Detail 5
1.5 . Principal Detail 6
2 . Reconciliation Detail 7
3 . Other Information 8
4 . Stratification Detail 9
5 . Mortgage Loan Detail 14
6 . NOI Detail 16
7 . Delinquency Loan Detail 18
8 . Collateral Performance Delinquency and Loan Status Detail 19
9 . Appraisal Reduction Detail 20
10 . Historical Appraisal Reduction Detail 21
11 . Loan Modification Detail 22
12 . Historical Loan Modification Detail 23
13 . Specially Serviced Loan Detail 24
14 . Historical Specially Serviced Loan Detail 25
15 . Unscheduled Principal Detail 26
16 . Historical Unscheduled Principal Detail 27
17 . Liquidated Loan Detail 28
18 . Historical Liquidated Loan Detail 29
19 . CREFC Investor Reporting Package Legends 30
20 . Notes 31
Reports Available at sf.citidirect.com v. 21.09.28 Page 1 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
DISTRIBUTION SUMMARY
April 17, 2024
Accrual Other Non-Cash
Original Prior Pass-Through Day Interest (As Interest) Principal Total Realized Loss Balance Current
Class Balance Balance Rate Count Distributed Distributed Distributed Distributed /(Recovery) Change Balance
A-1 19,800,000.00 11,884,239.80 1.357000 % 30/360 13,439.09 - 325,782.98 339,222.07 - - 11,558,456.82
A-2 138,050,000.00 138,050,000.00 2.588000 % 30/360 297,727.83 - - 297,727.83 - - 138,050,000.00
A-3 23,220,000.00 23,220,000.00 2.703000 % 30/360 52,303.05 - - 52,303.05 - - 23,220,000.00
A-4 215,000,000.00 215,000,000.00 2.420000 % 30/360 433,583.33 - - 433,583.33 - - 215,000,000.00
A-5 575,676,000.00 575,676,000.00 2.669000 % 30/360 1,280,399.37 - - 1,280,399.37 - - 575,676,000.00
A-AB 23,526,000.00 23,526,000.00 2.615000 % 30/360 51,267.07 - - 51,267.07 - - 23,526,000.00
A-S 142,182,000.00 142,182,000.00 2.892000 % 30/360 342,658.62 - - 342,658.62 - - 142,182,000.00
B 63,981,000.00 63,981,000.00 2.748000 % 30/360 146,516.49 - - 146,516.49 - - 63,981,000.00
C 60,428,000.00 60,428,000.00 3.195000 % 30/360 160,889.55 - - 160,889.55 - - 60,428,000.00
D 37,322,000.00 37,322,000.00 2.250000 % 30/360 69,978.75 - - 69,978.75 - - 37,322,000.00
E 26,659,000.00 26,659,000.00 2.250000 % 30/360 49,985.62 - - 49,985.62 - - 26,659,000.00
F 26,660,000.00 26,660,000.00 2.250000 % 30/360 49,987.50 - - 49,987.50 - - 26,660,000.00
G 14,218,000.00 14,218,000.00 2.250000 % 30/360 26,658.75 - - 26,658.75 - - 14,218,000.00
H 55,095,655.00 55,095,655.00 2.250000 % 30/360 85,756.69 - - 85,756.69 - - 55,095,655.00
R - - 0.000000 % 30/360 - - - - - - -
S - - 0.000000 % 30/360 - - - - - - -
VRR Interest 74,832,509.00 74,415,890.00 0.000000 % 30/360 216,502.51 - 17,146.47 233,648.98 - - 74,398,743.53
Total 1,496,650,164.00 1,488,317,784.80 3,277,654.22 - 342,929.45 3,620,583.67 - - 1,487,974,855.35
Notional
X-A 1,137,454,000.00 1,129,538,239.80 0.880578 % 30/360 828,871.98 - - 828,871.98 - (325,782.98 ) 1,129,212,456.82
X-B 124,409,000.00 124,409,000.00 0.541006 % 30/360 56,088.38 - - 56,088.38 - - 124,409,000.00
X-D 63,981,000.00 63,981,000.00 1.256123 % 30/360 66,973.36 - - 66,973.36 - - 63,981,000.00
X-F 26,660,000.00 26,660,000.00 1.256123 % 30/360 27,906.87 - - 27,906.87 - - 26,660,000.00
X-G 14,218,000.00 14,218,000.00 1.256123 % 30/360 14,882.97 - - 14,882.97 - - 14,218,000.00
X-H 55,095,655.00 55,095,655.00 1.256123 % 30/360 57,672.45 - - 57,672.45 - - 55,095,655.00
Total 1,421,817,655.00 1,413,901,894.80 1,052,396.01 - - 1,052,396.01 - (325,782.98 ) 1,413,576,111.82
Grand Total 2,918,467,819.00 2,902,219,679.60 4,330,050.23 - 342,929.45 4,672,979.68 - (325,782.98 ) 2,901,550,967.17
Reports Available at sf.citidirect.com v. 21.09.28 Page 2 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
DISTRIBUTION SUMMARY - FACTORS
April 17, 2024
Other Non-Cash
Record Interest (As Interest) Principal Total Realized Loss Balance Current
Class CUSIP Date Distributed Distributed Distributed Distributed /(Recovery) Change Balance
A-1 08163 MAA5 03/29/2024 0.67874192 - 16.45368586 17.13242778 - - 583.76044545
A-2 08163 MAB3 03/29/2024 2.15666664 - - 2.15666664 - - 1,000.00000000
A-3 08163 MAC1 03/29/2024 2.25250000 - - 2.25250000 - - 1,000.00000000
A-4 08163 MAD9 03/29/2024 2.01666665 - - 2.01666665 - - 1,000.00000000
A-5 08163 MAE7 03/29/2024 2.22416667 - - 2.22416667 - - 1,000.00000000
A-AB 08163 MAF4 03/29/2024 2.17916645 - - 2.17916645 - - 1,000.00000000
A-S 08163 MAH0 03/29/2024 2.41000000 - - 2.41000000 - - 1,000.00000000
B 08163 MAJ6 03/29/2024 2.29000000 - - 2.29000000 - - 1,000.00000000
C 08163 MAK3 03/29/2024 2.66250000 - - 2.66250000 - - 1,000.00000000
D 08163MAW7 U0744XAF2 03/29/2024 1.87500000 - - 1.87500000 - - 1,000.00000000
E 08163MAY3 U0744XAG0 03/29/2024 1.87499981 - - 1.87499981 - - 1,000.00000000
F 08163MBA4 U0744XAH8 03/29/2024 1.87500000 - - 1.87500000 - - 1,000.00000000
G 08163MBC0 U0744XAJ4 03/29/2024 1.87500000 - - 1.87500000 - - 1,000.00000000
H 08163MBE6 U0744XAK1 03/29/2024 1.55650550 - - 1.55650550 - - 1,000.00000000
R 08163 MBJ5 03/29/2024 - - - - - - -
S 00163 MBH9 03/29/2024 - - - - - - -
VRR Interest 08163 MBM8 03/29/2024 2.89316118 - 0.22913130 3.12229248 - - 994.20351561
X-A 08163 MAG2 03/29/2024 0.72870813 - - 0.72870813 - - 992.75439431
X-B 08163MAL1 U0744XAA3 03/29/2024 0.45083860 - - 0.45083860 - - 1,000.00000000
X-D 08163MAN7 U0744XAB1 03/29/2024 1.04676951 - - 1.04676951 - - 1,000.00000000
X-F 08163MAQ0 U0744XAC9 03/29/2024 1.04676932 - - 1.04676932 - - 1,000.00000000
X-G 08163MAS6 U0744XAD7 03/29/2024 1.04676959 - - 1.04676959 - - 1,000.00000000
X-H 08163MAU1 U0744XAE5 03/29/2024 1.04676948 - - 1.04676948 - - 1,000.00000000
Reports Available at sf.citidirect.com v. 21.09.28 Page 3 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
DISTRIBUTION INFORMATION - INTEREST DETAIL
April 17, 2024
Rate Interest Shortfall Paid
Accrual Net Non Carry Basis Carry
Class Uncapped Capped Next Dates Accrued Deferred Recovered Forward Risk Accrued Forward Basis Risk Total
A-1 1.35700 % 1.35700 % 1.35700 % 03/01-03/31 13,439.09 - - - - 13,439.09 - - 13,439.09
A-2 2.58800 % 2.58800 % 2.58800 % 03/01-03/31 297,727.83 - - - - 297,727.83 - - 297,727.83
A-3 2.70300 % 2.70300 % 2.70300 % 03/01-03/31 52,303.05 - - - - 52,303.05 - - 52,303.05
A-4 2.42000 % 2.42000 % 2.42000 % 03/01-03/31 433,583.33 - - - - 433,583.33 - - 433,583.33
A-5 2.66900 % 2.66900 % 2.66900 % 03/01-03/31 1,280,399.37 - - - - 1,280,399.37 - - 1,280,399.37
A-AB 2.61500 % 2.61500 % 2.61500 % 03/01-03/31 51,267.07 - - - - 51,267.07 - - 51,267.07
A-S 2.89200 % 2.89200 % 2.89200 % 03/01-03/31 342,658.62 - - - - 342,658.62 - - 342,658.62
B 2.74800 % 2.74800 % 2.74800 % 03/01-03/31 146,516.49 - - - - 146,516.49 - - 146,516.49
C 3.19500 % 3.19500 % 3.19500 % 03/01-03/31 160,889.55 - - - - 160,889.55 - - 160,889.55
D 2.25000 % 2.25000 % 2.25000 % 03/01-03/31 69,978.75 - - - - 69,978.75 - - 69,978.75
E 2.25000 % 2.25000 % 2.25000 % 03/01-03/31 49,985.62 - - - - 49,985.62 - - 49,985.62
F 2.25000 % 2.25000 % 2.25000 % 03/01-03/31 49,987.50 - - - - 49,987.50 - - 49,987.50
G 2.25000 % 2.25000 % 2.25000 % 03/01-03/31 26,658.75 - - - - 26,658.75 - - 26,658.75
H 2.25000 % 2.25000 % 2.25000 % 03/01-03/31 103,304.35 - - 17,740.52 - 85,756.69 - - 85,756.69
R 0.00000 % 0.00000 % 0.00000 % 03/01-03/31 - - - - - - - - -
S 0.00000 % 0.00000 % 0.00000 % 03/01-03/31 - - - - - - - - -
VRR Interest 0.00000 % 0.00000 % 0.00000 % 03/01-03/31 216,502.51 - - - - 216,502.51 - - 216,502.51
Total 3,295,201.88 - - 17,740.52 - 3,277,654.22 - - 3,277,654.22
Notional
X-A 0.77577 % 0.88058 % 0.88058 % 03/01-03/31 828,871.98 - - - - 828,871.98 - - 828,871.98
X-B 0.42737 % 0.54101 % 0.54101 % 03/01-03/31 56,088.38 - - - - 56,088.38 - - 56,088.38
X-D 1.14249 % 1.25612 % 1.25612 % 03/01-03/31 66,973.36 - - - - 66,973.36 - - 66,973.36
X-F 1.14249 % 1.25612 % 1.25612 % 03/01-03/31 27,906.87 - - - - 27,906.87 - - 27,906.87
X-G 1.14249 % 1.25612 % 1.25612 % 03/01-03/31 14,882.97 - - - - 14,882.97 - - 14,882.97
X-H 1.14249 % 1.25612 % 1.25612 % 03/01-03/31 57,672.45 - - - - 57,672.45 - - 57,672.45
Total 1,052,396.01 - - - - 1,052,396.01 - - 1,052,396.01
Grand Total 4,347,597.89 - - 17,740.52 - 4,330,050.23 - - 4,330,050.23
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Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
DISTRIBUTION INFORMATION - INTEREST SHORTFALL DETAIL
April 17, 2024
Non-Recov Shortfall Carry Forward Interest Basis Risk Shortfall
Other
Class PPIS SSRA Shortfall Prior Int. on Prior New Paid Outstanding Prior Int. on Prior New Paid Outstanding
A-1 - - - - - - - - - - - - -
A-2 - - - - - - - - - - - - -
A-3 - - - - - - - - - - - - -
A-4 - - - - - - - - - - - - -
A-5 - - - - - - - - - - - - -
A-AB - - - - - - - - - - - - -
A-S - - - - - - - - - - - - -
B - - - - - - - - - - - - -
C - - - - - - - - - - - - -
D - - - - - - - - - - - - -
E - - - - - - - - - - - - -
F - - - - - - - - - - - - -
G - - - - - - - - - - - - -
H - - - 102,857.28 192.86 17,547.66 - 120,597.80 - - - - -
R - - - - - - - - - - - - -
S - - - - - - - - - - - - -
VRR Interest - - - - - - - - - - - - -
Total - - - 102,857.28 192.86 17,547.66 - 120,597.80 - - - - -
Notional
X-A - - - - - - - - - - - - -
X-B - - - - - - - - - - - - -
X-D - - - - - - - - - - - - -
X-F - - - - - - - - - - - - -
X-G - - - - - - - - - - - - -
X-H - - - - - - - - - - - - -
Total - - - - - - - - - - - - -
Grand Total - - - 102,857.28 192.86 17,547.66 - 120,597.80 - - - - -
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Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
DISTRIBUTION INFORMATION - PRINCIPAL DETAIL
April 17, 2024
Non-Cash Cumulative
Prior Principal Accreted Realized Loss Balance Current Realized Class % Class % Sub % Sub %
Class Balance Distributed Principal /(Recovery) Change Balance Loss Original Current Original Current
A-1 11,884,239.80 325,782.98 - - - 11,558,456.82 - 1.32 % 0.78 % 30.00 % 30.17 %
A-2 138,050,000.00 - - - - 138,050,000.00 - 9.22 % 9.28 % 30.00 % 30.17 %
A-3 23,220,000.00 - - - - 23,220,000.00 - 1.55 % 1.56 % 30.00 % 30.17 %
A-4 215,000,000.00 - - - - 215,000,000.00 - 14.37 % 14.45 % 30.00 % 30.17 %
A-5 575,676,000.00 - - - - 575,676,000.00 - 38.46 % 38.69 % 30.00 % 30.17 %
A-AB 23,526,000.00 - - - - 23,526,000.00 - 1.57 % 1.58 % 30.00 % 30.17 %
A-S 142,182,000.00 - - - - 142,182,000.00 - 9.50 % 9.56 % 20.00 % 20.12 %
B 63,981,000.00 - - - - 63,981,000.00 - 4.27 % 4.30 % 15.50 % 15.59 %
C 60,428,000.00 - - - - 60,428,000.00 - 4.04 % 4.06 % 11.25 % 11.32 %
D 37,322,000.00 - - - - 37,322,000.00 - 2.49 % 2.51 % 8.63 % 8.68 %
E 26,659,000.00 - - - - 26,659,000.00 - 1.78 % 1.79 % 6.75 % 6.79 %
F 26,660,000.00 - - - - 26,660,000.00 - 1.78 % 1.79 % 4.88 % 4.90 %
G 14,218,000.00 - - - - 14,218,000.00 - 0.95 % 0.96 % 3.88 % 3.90 %
H 55,095,655.00 - - - - 55,095,655.00 - 3.68 % 3.70 % 0.00 % 0.00 %
R - - - - - - - 0.00 % 0.00 % 0.00 % 0.00 %
S - - - - - - - 0.00 % 0.00 % 0.00 % 0.00 %
VRR Interest 74,415,890.00 17,146.47 - - - 74,398,743.53 - 5.00 % 5.00 % 0.00 % 0.00 %
Total 1,488,317,784.80 342,929.45 - - - 1,487,974,855.35 - 99.98 % 100.00 %
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Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
RECONCILIATION DETAIL
April 17, 2024
SOURCE OF FUNDS ALLOCATION OF FUNDS
Interest Funds Available Scheduled Fees
Scheduled Interest 4,364,604.69 Servicing Fee 6,496.80
Prepayment Interest Shortfall - Trustee/Certificate Administrator Fee 7,561.47
Interest Adjustments - Operating Advisor Fee 1,063.72
ASER Amount - Asset Representations Reviewer Ongoing Fee 320.40
Realized Loss in Excess of Principal Balance - CREFC Intellectual Property Royalty License Fee 640.81
Total Interest Funds Available 4,364,604.69 Total Scheduled Fees 16,083.20
Principal Funds Available Additional Fees, Expenses, etc.
Scheduled Principal 342,929.45 Additional Servicing Fee -
Unscheduled Principal Collections - Special Servicing Fee 18,469.42
Net Liquidation Proceeds - Work-out Fee -
Repurchased Principal - Liquidation Fee -
Substitution Principal - Trust Fund Expenses -
Other Principal - Trust Advisor Expenses -
Reimbursement of Interest on Advances to the Servicer 1.84
Total Principal Funds Available 342,929.45
Borrower Reimbursable Trust Fund Expenses -
Other Funds Available
Other Expenses -
Yield Maintenance Charges -
Withdrawal of Withheld Amounts from the Interest Reserve Total Additional Fees, Expenses, etc. 18,471.26
Account -
Distributions
Deposit of Withheld Amounts to the Interest Reserve Account -
Interest Distribution 4,330,050.23
Total Other Funds Available - Principal Distribution 342,929.45
Yield Maintenance Charge Distribution -
Total Distributions 4,672,979.68
Total Funds Available 4,707,534.14 Total Funds Allocated 4,707,534.14
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Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
OTHER INFORMATION
Interest Reserve Account Information
April 17, 2024
Beginning Interest Reserve Account Balance 0.00
Deposit of Withheld Amounts to the Interest Reserve Account 0.00
Withdrawal of Withheld Amounts from the Interest Reserve Account 0.00
Ending Interest Reserve Account Balance 0.00
Collateral Information
% of Cut-Off Principal Balance Outstanding 99.420352 %
Controlling Class Information
Controlling Class is Class H.
The Controlling Class Representative is RREF IV Debt AIV, LP.
There Are No Disclosable Special Servicer Fees.
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Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
STRATIFICATION DETAIL
April 17, 2024
Anticipated Remaining Term
Anticipated Remaining Asset Ending Scheduled % of Wtd Avg
Term Range Count Balance Agg.Bal. WAC WAM DSCR
60 Months or Less 5 172,990,919.74 11.63 3.3819 34 2.617325
61 to 90 Months 7 199,476,912.94 13.41 3.1270 89 2.651887
91 Months or Greater 50 1,115,507,022.67 74.97 3.4591 91 2.549142
Total 62 1,487,974,855.35 100.00 3.4056 84 2.570843
Debt Service Coverage Ratio
Debt Service Coverage Asset Ending Scheduled % of Wtd Avg
Ratio Range Count Balance Agg.Bal. WAC WAM DSCR
1.250 or Less 5 116,193,423.11 7.81 3.4380 91 1.178454
1.251 to 1.500 1 42,283,214.94 2.84 3.2400 31 1.480000
1.501 to 1.750 7 178,566,163.86 12.00 3.5307 90 1.636889
1.751 to 2.000 6 74,330,622.73 5.00 3.8959 91 1.934667
2.001 to 2.250 9 131,126,711.00 8.81 3.8596 91 2.142374
2.251 to 2.500 7 166,100,000.00 11.16 3.9010 80 2.373709
2.501 to 2.750 7 246,050,000.00 16.54 3.1797 88 2.629399
2.751 to 3.000 4 50,925,000.00 3.42 3.1999 90 2.818586
3.001 to 3.250 5 127,333,903.42 8.56 3.1696 91 3.176980
3.251 to 3.500 6 263,140,816.29 17.68 2.9342 74 3.377574
3.501 to 3.750 1 30,000,000.00 2.02 2.9900 90 3.580000
3.751 to 4.000 1 21,000,000.00 1.41 2.9480 92 4.000000
4.001 or Greater 3 40,925,000.00 2.75 4.5022 91 5.848094
Total 62 1,487,974,855.35 100.00 3.4056 84 2.570843
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Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
STRATIFICATION DETAIL
April 17, 2024
Ending Schedule Balance
Ending Schedule Balance Asset Ending Scheduled % of Wtd Avg
Range Count Balance Agg.Bal. WAC WAM DSCR
1 to 5,000,000 5 15,761,224.43 1.06 3.6440 91 2.380987
10,000,001 to 15,000,000 5 61,323,459.06 4.12 3.5662 90 2.971084
15,000,001 to 20,000,000 12 213,508,623.94 14.35 3.9447 88 2.743849
20,000,001 to 25,000,000 5 112,279,591.86 7.55 3.2379 91 2.723810
25,000,001 to 30,000,000 2 58,150,000.00 3.91 2.8460 90 3.129794
30,000,001 to 35,000,000 4 130,092,678.16 8.74 3.0142 76 2.276364
35,000,001 to 40,000,000 4 157,600,000.00 10.59 3.6212 92 2.598223
40,000,001 to 45,000,000 3 127,783,214.94 8.59 3.1554 71 1.574105
45,000,001 to 50,000,000 3 143,600,000.00 9.65 3.5662 91 2.491699
5,000,001 to 10,000,000 13 97,432,159.59 6.55 3.7406 87 2.306366
50,000,001 to 55,000,000 1 55,000,000.00 3.70 3.3610 90 2.670000
55,000,001 to 60,000,000 3 170,443,903.37 11.45 3.4281 92 2.356664
60,000,001 to 65,000,000 0 0.00 0.00 0.0000 0 0.000000
65,000,001 to 70,000,000 1 70,000,000.00 4.70 2.7920 91 3.320000
70,000,001 to 75,000,000 1 75,000,000.00 5.04 2.8380 31 3.490000
75,000,001 to 80,000,000 0 0.00 0.00 0.0000 0 0.000000
80,000,001 to 85,000,000 0 0.00 0.00 0.0000 0 0.000000
85,000,000+ 0 0.00 0.00 0.0000 0 0.000000
Total 62 1,487,974,855.35 100.00 3.4056 84 2.570843
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Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
STRATIFICATION DETAIL
April 17, 2024
Loan Rate
Asset Ending Scheduled % of Wtd Avg
Loan Rate Range Count Balance Agg.Bal. WAC WAM DSCR
4.00 or Less 57 1,424,192,150.55 95.71 3.3417 86 2.519473
4.01 to 4.25 1 2,400,000.00 0.16 4.1000 91 1.100000
4.26 to 4.50 3 41,407,704.80 2.78 4.3646 38 2.127098
4.51 to 4.75 0 0.00 0.00 0.0000 0 0.000000
4.76 to 5.00 0 0.00 0.00 0.0000 0 0.000000
5.01 to 5.25 0 0.00 0.00 0.0000 0 0.000000
5.26 to 5.50 0 0.00 0.00 0.0000 0 0.000000
5.51 to 5.75 0 0.00 0.00 0.0000 0 0.000000
5.76 to 6.00 1 19,975,000.00 1.34 5.8870 91 7.330000
6.01 to 6.25 0 0.00 0.00 0.0000 0 0.000000
6.26 to 6.50 0 0.00 0.00 0.0000 0 0.000000
6.51 to 6.75 0 0.00 0.00 0.0000 0 0.000000
6.76 to 7.00 0 0.00 0.00 0.0000 0 0.000000
7.01 or Greater 0 0.00 0.00 0.0000 0 0.000000
Total 62 1,487,974,855.35 100.00 3.4056 84 2.570843
Property Type
Asset Ending Scheduled % of Wtd Avg
Property Type Range Count Balance Agg.Bal. WAC WAM DSCR
Industrial 7 130,885,000.00 8.80 3.7214 91 2.435100
Lodging 0 0.00 0.00 0.0000 0 0.000000
Mixed Use 7 231,940,816.29 15.59 3.2162 91 2.765044
Multifamily 13 269,550,382.96 18.12 3.3318 90 1.982845
Office 14 409,194,526.10 27.50 3.2519 74 2.679985
Other 7 186,029,925.94 12.50 3.4708 77 2.355802
Retail 12 235,214,204.06 15.81 3.6798 90 3.128164
Self Storage 1 6,660,000.00 0.45 3.5100 92 2.810000
Total 62 1,487,974,855.35 100.00 3.4056 84 2.570843
Reports Available at sf.citidirect.com v. 21.09.28 Page 11 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
STRATIFICATION DETAIL
April 17, 2024
Remaining Amortization Term
Remaining Amortization Asset Ending Scheduled % of Wtd Avg
Term Range Count Balance Agg.Bal. WAC WAM DSCR
240 Months or Less 50 1,211,772,527.29 81.44 3.4482 85 2.768268
241 to 270 Months 0 0.00 0.00 0.0000 0 0.000000
271 to 300 Months 0 0.00 0.00 0.0000 0 0.000000
301 Months or Greater 12 276,202,328.06 18.56 3.2188 81 1.704685
Total 62 1,487,974,855.35 100.00 3.4056 84 2.570843
Seasoning
Asset Ending Scheduled % of Wtd Avg
Seasoning Range Count Balance Agg.Bal. WAC WAM DSCR
12 Months or Less 0 0.00 0.00 0.0000 0 0.000000
13 to 24 Months 0 0.00 0.00 0.0000 0 0.000000
25 to 36 Months 62 1,487,974,855.35 100.00 3.4056 84 2.570843
37 to 48 Months 0 0.00 0.00 0.0000 0 0.000000
49 Months or Greater 0 0.00 0.00 0.0000 0 0.000000
Total 62 1,487,974,855.35 100.00 3.4056 84 2.570843
Reports Available at sf.citidirect.com v. 21.09.28 Page 12 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
STRATIFICATION DETAIL
April 17, 2024
State
Asset Ending Scheduled % of Wtd Avg
State Range Count Balance Agg.Bal. WAC WAM DSCR
Arizona 1 55,000,000.00 3.70 3.3610 90 2.670000
California 8 145,450,000.00 9.78 3.2677 90 3.035810
Connecticut 2 94,000,000.00 6.32 3.2570 92 2.550000
Florida 3 59,150,000.00 3.98 3.8915 91 2.360964
Georgia 2 21,575,000.00 1.45 5.7789 91 6.934728
Illinois 1 42,500,000.00 2.86 3.7800 92 1.510000
Indiana 1 8,200,000.00 0.55 3.3090 92 4.070000
Kansas 1 9,830,000.00 0.66 3.8900 91 1.960000
Massachusetts 6 211,290,816.29 14.20 2.7623 90 3.119752
Michigan 2 12,700,000.00 0.85 3.6859 92 2.725433
Mississippi 1 9,407,704.80 0.63 4.3200 55 1.590000
N/A 6 193,029,925.94 12.97 3.4963 78 2.395326
New Jersey 5 177,045,687.68 11.90 2.8276 65 2.293743
New York 9 175,983,903.42 11.83 3.6003 91 2.182843
North Carolina 1 13,250,000.00 0.89 3.8080 92 3.180000
Ohio 3 32,080,000.00 2.16 3.8937 73 2.624782
Oregon 1 40,000,000.00 2.69 3.6410 92 3.380000
Rhode Island 2 58,250,000.00 3.91 3.7908 92 2.317940
Tennessee 1 6,660,000.00 0.45 3.5100 92 2.810000
Texas 3 72,702,985.16 4.89 3.8148 92 1.369901
Utah 1 30,400,000.00 2.04 4.3750 31 2.300000
Vermont 1 6,203,832.06 0.42 3.6000 91 1.140000
Virginia 1 13,265,000.00 0.89 3.1800 88 2.860000
Total 62 1,487,974,855.35 100.00 3.4056 84 2.570843
Reports Available at sf.citidirect.com v. 21.09.28 Page 13 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
MORTGAGE LOAN DETAIL
April 17, 2024
Prop Paid Beginning Ending Payment Workout Mod
Type Through Gross Interest Principal Scheduled Scheduled Maturity Status Strategy Code
Loan ID OMCR (1) City State Date Coupon Payment Payment Balance Balance Date (2 ) (3 ) (4 )
30508068 10 N/A 04/06/2024 3.24000 % 118,168.00 70,908.09 42,354,123.03 42,283,214.94 11/06/2026 0 0 0
30508200 11 A1 MF Harrison NJ 04/01/2024 2.45500 % 90,903.19 - 43,000,000.00 43,000,000.00 12/01/2031 0 0 0
30508148 12 MF IL 04/06/2024 3.78000 % 138,337.50 - 42,500,000.00 42,500,000.00 12/06/2031 0 98 0
30507887 13 A1 IN Town of Burrillville RI 04/06/2024 3.71000 % 127,788.89 - 40,000,000.00 40,000,000.00 12/06/2031 0 0 0
30508193 14 A1 RT Tualatin OR 04/05/2024 3.64100 % 125,412.22 - 40,000,000.00 40,000,000.00 12/05/2031 0 0 0
30320459 15 A1 IN 04/06/2024 3.85500 % 132,783.33 - 40,000,000.00 40,000,000.00 12/06/2031 0 0 0
30508186 16 MF Fort Lee NJ 04/06/2024 2.62000 % 76,764.78 41,492.22 34,025,266.96 33,983,774.74 12/06/2031 0 0 0
30508108 17 MF Kew Garden Hills NY 04/06/2024 2.47000 % 65,449.01 62,473.52 30,771,376.94 30,708,903.42 11/06/2031 0 0 0
30507803 18 OF Lehi UT 04/01/2024 4.37500 % 114,527.78 - 30,400,000.00 30,400,000.00 11/01/2026 0 0 0
30507941 19 A2 RT Concord CA 04/05/2024 2.99000 % 77,241.67 - 30,000,000.00 30,000,000.00 10/05/2031 0 0 0
30508000 20 N/A 04/06/2024 3.94000 % 55,121.48 - 16,246,711.00 16,246,711.00 11/06/2031 0 0 0
30507995 21 IN Oregon OH 04/06/2024 3.97000 % 28,647.96 - 8,380,000.00 8,380,000.00 11/06/2031 0 0 0
30508009 22 OF Beverly Hills CA 04/06/2024 2.90100 % 57,955.53 - 23,200,000.00 23,200,000.00 11/06/2031 0 0 0
30508065 23 MU New York NY 04/06/2024 3.91000 % 77,776.42 - 23,100,000.00 23,100,000.00 11/06/2031 0 0 0
30508219 24 OF Sunnyvale CA 04/06/2024 2.94800 % 53,309.67 - 21,000,000.00 21,000,000.00 12/06/2031 0 0 0
30508187 25 N/A New York NY 04/06/2024 3.67000 % 66,365.83 - 21,000,000.00 21,000,000.00 12/06/2031 0 0 0
30508028 26 A3 RT Los Angeles CA 04/06/2024 3.49000 % 60,105.56 - 20,000,000.00 20,000,000.00 10/06/2031 0 0 0
30508006 27 RT Morrow GA 04/06/2024 5.88700 % 101,260.49 - 19,975,000.00 19,975,000.00 11/06/2031 0 0 0
30508080 28 A2 RT Audubon NJ 04/06/2024 3.72000 % 57,953.52 29,715.32 18,091,628.26 18,061,912.94 08/06/2031 0 0 0
30508197 29 MH El Cajon CA 04/06/2024 3.84000 % 61,173.33 - 18,500,000.00 18,500,000.00 12/06/2031 0 0 0
30320453 2 A1 OF Greenwich CT 04/06/2024 3.25700 % 158,181.63 - 56,400,000.00 56,400,000.00 12/06/2031 0 0 0
30320454 2 A2 OF Greenwich CT 04/06/2024 3.25700 % 105,454.42 - 37,600,000.00 37,600,000.00 12/06/2031 0 0 0
30508145 30 MF North Providence RI 04/01/2024 3.96800 % 62,358.22 - 18,250,000.00 18,250,000.00 12/01/2031 0 0 0
30508188 31 N/A 04/06/2024 3.32000 % 51,460.00 - 18,000,000.00 18,000,000.00 12/06/2031 0 0 0
30508047 32 N/A 04/06/2024 3.91000 % 60,605.00 - 18,000,000.00 18,000,000.00 11/06/2031 0 0 0
30508070 33 IN Haverstraw NY 04/06/2024 3.48000 % 53,565.42 - 17,875,000.00 17,875,000.00 12/06/2031 0 0 0
30320461 34 MF Los Angeles CA 04/06/2024 3.76000 % 56,984.89 - 17,600,000.00 17,600,000.00 11/06/2031 0 0 0
30507953 35 OF Blue Ash OH 04/01/2024 3.87100 % 53,000.44 - 15,900,000.00 15,900,000.00 11/01/2028 0 0 0
30508142 36 MU Jackson Heights NY 04/06/2024 3.98000 % 51,751.06 - 15,100,000.00 15,100,000.00 12/06/2031 0 0 0
30530175 37 RT Vinton VA 04/06/2024 3.18000 % 36,323.99 - 13,265,000.00 13,265,000.00 08/06/2031 0 0 0
30508066 38 RT Gastonia NC 04/06/2024 3.80800 % 43,448.22 - 13,250,000.00 13,250,000.00 12/06/2031 0 0 0
30508049 39 OF Pomona CA 04/06/2024 3.10000 % 34,035.42 - 12,750,000.00 12,750,000.00 11/06/2031 0 0 0
Reports Available at sf.citidirect.com v. 21.09.28 Page 14 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
MORTGAGE LOAN DETAIL
April 17, 2024
Prop Paid Beginning Ending Payment Workout Mod
Type Through Gross Interest Principal Scheduled Scheduled Maturity Status Strategy Code
Loan ID OMCR (1) City State Date Coupon Payment Payment Balance Balance Date (2 ) (3 ) (4 )
30320455 3 A1 OF Plainsboro NJ 04/06/2024 2.83800 % 183,287.50 - 75,000,000.00 75,000,000.00 04/06/2031 0 0 0
30508195 40 N/A Nanuet NY 04/01/2024 3.99300 % 41,261.00 - 12,000,000.00 12,000,000.00 12/01/2031 0 0 0
30508069 41 RT Austin TX 04/06/2024 3.83900 % 33,303.72 15,855.21 10,074,314.27 10,058,459.06 12/06/2031 0 0 0
30508046 42 IN Topeka KS 04/06/2024 3.89000 % 32,927.77 - 9,830,000.00 9,830,000.00 11/06/2031 0 0 0
30508052 43 MF Jackson MS 04/06/2024 4.32000 % 35,047.13 13,565.43 9,421,270.23 9,407,704.80 11/06/2028 0 0 0
30530176 44 IN Indianapolis IN 04/06/2024 3.30900 % 23,365.22 - 8,200,000.00 8,200,000.00 12/06/2031 0 0 0
30530172 45 RT Mason OH 04/06/2024 3.85800 % 25,912.90 - 7,800,000.00 7,800,000.00 11/06/2031 0 0 0
30508007 46 OF West Palm Beach FL 04/06/2024 3.35000 % 21,779.65 - 7,550,000.00 7,550,000.00 11/06/2031 0 0 0
30530177 47 OF Houston TX 04/06/2024 3.89600 % 23,856.75 10,416.87 7,111,039.60 7,100,622.73 12/06/2031 0 0 0
30508144 48 MF Ann Arbor MI 04/01/2024 3.65000 % 22,001.39 - 7,000,000.00 7,000,000.00 12/01/2031 0 0 0
30508051 49 MF Orange NJ 04/06/2024 3.71000 % 22,363.06 - 7,000,000.00 7,000,000.00 11/06/2031 0 0 0
30507836 4 A5 OF Cambridge MA 04/05/2024 2.69250 % 81,148.96 - 35,000,000.00 35,000,000.00 10/05/2031 0 0 0
30507837 4 A6 OF Cambridge MA 04/05/2024 2.69250 % 65,266.95 - 28,150,000.00 28,150,000.00 10/05/2031 0 0 0
30508185 5 N/A 04/06/2024 3.24000 % 163,215.00 - 58,500,000.00 58,500,000.00 12/06/2031 0 0 0
30508158 50 SS TN 04/06/2024 3.51000 % 20,129.85 - 6,660,000.00 6,660,000.00 12/06/2031 0 0 0
30508073 51 IN Yonkers NY 04/06/2024 3.58000 % 20,346.33 - 6,600,000.00 6,600,000.00 12/06/2031 0 0 0
30508106 52 RT Springfield VT 04/06/2024 3.60000 % 19,263.77 10,288.18 6,214,120.24 6,203,832.06 11/06/2031 0 0 0
30508192 53 MF Southfield MI 04/06/2024 3.73000 % 18,308.08 - 5,700,000.00 5,700,000.00 12/06/2031 0 0 0
30508218 54 MF Brooklyn NY 04/06/2024 3.64000 % 12,537.78 - 4,000,000.00 4,000,000.00 12/06/2031 0 0 0
30508010 55 OF Melbourne FL 04/06/2024 3.98000 % 12,338.00 - 3,600,000.00 3,600,000.00 11/06/2031 0 0 0
30320462 56 MF Los Angeles CA 04/06/2024 4.10000 % 8,473.33 - 2,400,000.00 2,400,000.00 11/06/2031 0 0 0
30508110 57 RT Newnan GA 04/06/2024 4.43000 % 6,103.56 - 1,600,000.00 1,600,000.00 11/06/2031 0 0 0
30508191 6 OF TX 04/06/2024 3.80000 % 182,040.65 88,214.61 55,632,117.98 55,543,903.37 12/06/2031 0 98 0
30530169 7 A1 RT Tucson AZ 04/06/2024 3.36100 % 159,180.69 - 55,000,000.00 55,000,000.00 10/06/2031 0 0 0
30508159 8 A1 MF FL 04/06/2024 3.97000 % 164,093.33 - 48,000,000.00 48,000,000.00 12/06/2031 0 0 0
30508147 9 MU New York NY 04/01/2024 3.99000 % 156,674.00 - 45,600,000.00 45,600,000.00 12/01/2031 0 0 0
30320449 A-1-2 MU Cambridge MA 04/06/2024 2.79200 % 168,295.56 - 70,000,000.00 70,000,000.00 11/06/2036 0 0 0
30320450 A-1-4 MU Cambridge MA 04/06/2024 2.79200 % 120,211.11 - 50,000,000.00 50,000,000.00 11/06/2036 0 0 0
30320451 A-1-9 MU Cambridge MA 04/06/2024 2.79200 % 10,004.51 - 4,161,224.43 4,161,224.43 11/06/2036 0 0 0
30320452 A-3-3 MU Cambridge MA 04/06/2024 2.79200 % 57,652.27 - 23,979,591.86 23,979,591.86 11/06/2036 0 0 0
Total Count = 62 4,364,604.69 342,929.45 1,488,317,784.80 1,487,974,855.35
Reports Available at sf.citidirect.com v. 21.09.28 Page 15 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
NOI DETAIL
April 17, 2024
Property Ending Preceding Most Most Recent Most Recent
Type Scheduled Fiscal Recent Financial As of Financial Asof
Loan ID OMCR (1) City State Balance Year NOI NOI Start Date End Date
30508068 10 N/A 42,283,214.94 4,051,730.75 3,973,862.97 01/01/2023 09/30/2023
30508200 11 A1 MF Harrison NJ 43,000,000.00 3,589,217.12 4,629,836.76 01/01/2023 12/31/2023
30508148 12 MF IL 42,500,000.00 2,161,245.29 2,598,042.69 Not Available Not Available
30507887 13 A1 IN Town of Burrillville RI 40,000,000.00 5,805,023.16 5,915,410.67 Not Available Not Available
30508193 14 A1 RT Tualatin OR 40,000,000.00 7,389,128.22 8,052,027.31 01/01/2023 12/31/2023
30320459 15 A1 IN 40,000,000.00 5,541,655.43 5,626,332.86 Not Available Not Available
30508186 16 MF Fort Lee NJ 33,983,774.74 1,672,007.04 1,672,007.04 Not Available Not Available
30508108 17 MF Kew Garden Hills NY 30,708,903.42 4,696,325.29 5,008,594.27 01/01/2023 12/31/2023
30507803 18 OF Lehi UT 30,400,000.00 3,230,926.48 3,274,838.95 01/01/2023 12/31/2023
30507941 19 A2 RT Concord CA 30,000,000.00 9,646,613.43 11,090,788.91 01/01/2023 12/31/2023
30508000 20 N/A 16,246,711.00 1,183,447.88 1,499,984.97 Not Available Not Available
30507995 21 IN Oregon OH 8,380,000.00 747,641.00 723,690.00 01/01/2023 12/31/2023
30508009 22 OF Beverly Hills CA 23,200,000.00 2,324,354.75 1,894,354.76 01/01/2023 09/30/2023
30508065 23 MU New York NY 23,100,000.00 1,459,562.91 1,860,051.28 01/01/2023 12/31/2023
30508219 24 OF Sunnyvale CA 21,000,000.00 2,305,364.74 2,527,633.13 01/01/2023 12/31/2023
30508187 25 N/A New York NY 21,000,000.00 1,327,322.32 1,263,319.11 Not Available Not Available
30508028 26 A3 RT Los Angeles CA 20,000,000.00 7,790,101.69 8,050,769.98 01/01/2023 09/30/2023
30508006 27 RT Morrow GA 19,975,000.00 8,888,890.14 9,371,569.69 01/01/2023 09/30/2023
30508080 28 A2 RT Audubon NJ 18,061,912.94 3,496,394.69 3,485,676.09 01/01/2023 12/31/2023
30508197 29 MH El Cajon CA 18,500,000.00 1,448,762.49 1,619,335.78 01/01/2023 12/31/2023
30320453 2 A1 OF Greenwich CT 56,400,000.00 8,664,114.23 8,654,703.01 01/01/2023 12/31/2023
30320454 2 A2 OF Greenwich CT 37,600,000.00 8,664,114.23 8,654,703.01 01/01/2023 12/31/2023
30508145 30 MF North Providence RI 18,250,000.00 1,485,630.50 1,637,220.20 01/01/2023 12/31/2023
30508188 31 N/A 18,000,000.00 1,881,242.54 1,785,563.28 Not Available Not Available
30508047 32 N/A 18,000,000.00 1,709,415.87 1,703,533.44 01/01/2023 09/30/2023
30508070 33 IN Haverstraw NY 17,875,000.00 1,472,629.42 2,019,564.48 01/01/2023 12/31/2023
30320461 34 MF Los Angeles CA 17,600,000.00 1,364,878.18 1,336,642.15 01/01/2023 12/31/2023
30507953 35 OF Blue Ash OH 15,900,000.00 1,652,738.83 1,736,441.82 01/01/2023 12/31/2023
30508142 36 MU Jackson Heights NY 15,100,000.00 1,184,928.65 1,253,466.40 01/01/2023 12/31/2023
30530175 37 RT Vinton VA 13,265,000.00 1,276,689.26 1,313,472.59 01/01/2023 12/31/2023
30508066 38 RT Gastonia NC 13,250,000.00 1,442,993.09 1,721,945.77 01/01/2023 12/31/2023
30508049 39 OF Pomona CA 12,750,000.00 2,043,241.29 1,891,405.48 01/01/2023 09/30/2023
Reports Available at sf.citidirect.com v. 21.09.28 Page 16 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
NOI DETAIL
April 17, 2024
Property Ending Preceding Most Most Recent Most Recent
Type Scheduled Fiscal Recent Financial As of Financial Asof
Loan ID OMCR (1) City State Balance Year NOI NOI Start Date End Date
30320455 3 A1 OF Plainsboro NJ 75,000,000.00 20,861,195.36 21,283,911.55 01/01/2023 12/31/2023
30508195 40 N/A Nanuet NY 12,000,000.00 1,008,561.68 1,014,993.68 01/01/2023 12/31/2023
30508069 41 RT Austin TX 10,058,459.06 987,920.78 1,035,429.11 01/01/2023 12/31/2023
30508046 42 IN Topeka KS 9,830,000.00 756,861.34 761,043.17 01/01/2023 12/31/2023
30508052 43 MF Jackson MS 9,407,704.80 624,161.52 953,791.77 01/01/2023 12/31/2023
30530176 44 IN Indianapolis IN 8,200,000.00 793,199.55 1,195,678.00 01/01/2023 12/31/2023
30530172 45 RT Mason OH 7,800,000.00 930,146.83 933,914.99 01/01/2023 12/31/2023
30508007 46 OF West Palm Beach FL 7,550,000.00 798,988.07 618,510.75 01/01/2023 12/31/2023
30530177 47 OF Houston TX 7,100,622.73 643,699.18 620,057.89 10/01/2022 09/30/2023
30508144 48 MF Ann Arbor MI 7,000,000.00 747,652.96 813,613.23 Not Available Not Available
30508051 49 MF Orange NJ 7,000,000.00 363,889.99 432,706.54 01/01/2023 06/30/2023
30507836 4 A5 OF Cambridge MA 35,000,000.00 31,184,646.64 30,874,106.83 01/01/2023 12/31/2023
30507837 4 A6 OF Cambridge MA 28,150,000.00 31,184,646.64 30,874,106.83 01/01/2023 12/31/2023
30508185 5 N/A 58,500,000.00 7,046,667.92 7,050,583.81 Not Available Not Available
30508158 50 SS TN 6,660,000.00 673,509.46 675,949.25 Not Available Not Available
30508073 51 IN Yonkers NY 6,600,000.00 594,832.15 579,836.89 01/01/2023 12/31/2023
30508106 52 RT Springfield VT 6,203,832.06 598,912.81 542,311.73 01/01/2023 09/30/2023
30508192 53 MF Southfield MI 5,700,000.00 620,063.85 521,799.18 01/01/2023 09/30/2023
30508218 54 MF Brooklyn NY 4,000,000.00 312,814.58 366,271.14 01/01/2023 12/31/2023
30508010 55 OF Melbourne FL 3,600,000.00 306,970.64 323,233.49 01/01/2023 12/31/2023
30320462 56 MF Los Angeles CA 2,400,000.00 164,125.58 111,385.90 01/01/2023 12/31/2023
30508110 57 RT Newnan GA 1,600,000.00 166,215.47 149,593.92 01/01/2023 12/31/2023
30508191 6 OF TX 55,543,903.37 5,371,586.65 8,518,760.00 01/01/2023 06/30/2023
30530169 7 A1 RT Tucson AZ 55,000,000.00 8,410,130.64 9,335,258.08 01/01/2023 12/31/2023
30508159 8 A1 MF FL 48,000,000.00 7,201,467.96 8,193,152.53 01/01/2023 12/31/2023
30508147 9 MU New York NY 45,600,000.00 3,113,186.43 3,108,391.69 01/01/2023 12/31/2023
30320449 A-1-2 MU Cambridge MA 70,000,000.00 66,918,171.00 76,535,443.00 01/01/2023 12/31/2023
30320450 A-1-4 MU Cambridge MA 50,000,000.00 66,918,171.00 76,535,443.00 01/01/2023 12/31/2023
30320451 A-1-9 MU Cambridge MA 4,161,224.43 66,918,171.00 76,535,443.00 01/01/2023 12/31/2023
30320452 A-3-3 MU Cambridge MA 23,979,591.86 66,918,171.00 76,535,443.00 01/01/2023 12/31/2023
Total Count = 62 1,487,974,855.35 504,737,069.59 554,876,952.80
Reports Available at sf.citidirect.com v. 21.09.28 Page 17 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
DELINQUENCY LOAN DETAIL
April 17, 2024
Actual Paid Current P&I Total P&I Cumulative Other Expense Payment Workout Most Recent
Principal Through Advances Advances Accrued Unpaid Advances Status Strategy Special Serv Foreclosure Bankruptcy REO
Loan ID OMCR Balance Date (Net of ASER) Outstanding Interest Advances Outstanding (2 ) (3 ) Transfer Date Date Date Date
No Loans with Delinquency Activity to Report.
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Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
COLLATERAL PERFORMANCE - DELINQUENCY AND LOAN STATUS DETAIL
April 17, 2024
Delinquent
(Does not include loans in Bankruptcy, Foreclosure, or REO)
30 Day 60 Day 90 Day 120 + Day Bankruptcy Foreclosure REO
Distribution
Date Count Balance Count Balance Count Balance Count Balance Count Balance Count Balance Count Balance
0 0 0 0 0 0 0 0 0 0 0 0 0 0
04/17/2024
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 0 0 0 0 0 0 0 0
03/15/2024
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 0 0 0 0 0 0 0 0
02/16/2024
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 0 0 0 0 0 0 0 0
01/18/2024
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 0 0 0 0 0 0 0 0
12/15/2023
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 0 0 0 0 0 0 0 0
11/17/2023
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 0 0 0 0 0 0 0 0
10/17/2023
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 0 0 0 0 0 0 0 0
09/15/2023
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 0 0 0 0 0 0 0 0
08/17/2023
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 0 0 0 0 0 0 0 0
07/17/2023
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 0 0 0 0 0 0 0 0
06/16/2023
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 0 0 0 0 0 0 0 0
05/17/2023
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
Reports Available at sf.citidirect.com v. 21.09.28 Page 19 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
APPRAISAL REDUCTION DETAIL
April 17, 2024
Beginning Ending Appraisal Appraisal Most Recent Cumulative
Loan ID OMCR Property Name Scheduled Balance Scheduled Balance Reduction Amount Reduction Date ASER Amount ASER Amount
No Loans with Appraisal Reduction Activity.
Reports Available at sf.citidirect.com v. 21.09.28 Page 20 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
HISTORICAL APPRAISAL REDUCTION DETAIL
April 17, 2024
Distribution Beginning Ending Appraisal Appraisal Most Recent Cumulative
Date Loan ID OMCR Property Name Scheduled Balance Scheduled Balance Reduction Amount Reduction Date ASER Amount ASER Amount
No Loans with Appraisal Reduction Activity.
Reports Available at sf.citidirect.com v. 21.09.28 Page 21 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
LOAN MODIFICATION DETAIL
April 17, 2024
Modification Modification
Loan ID OMCR Property Name Date Code (4)
No Loans with Modification Activity to Report.
Reports Available at sf.citidirect.com v. 21.09.28 Page 22 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
HISTORICAL LOAN MODIFICATION DETAIL
April 17, 2024
Distribution Modification Modification
Date Loan ID OMCR Property Name Date Code (4)
No Loans with Modification Activity to Report.
Reports Available at sf.citidirect.com v. 21.09.28 Page 23 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
SPECIALLY SERVICED LOAN DETAIL
April 17, 2024
Special Servicing Ending Ending Most Most Recent Most Recent Most Recent
Workout Fee Amount Scheduled Actual Recent Valuation Special Servicer Master Servicer
Loan ID OMCR Strategy (3) Plus Adjustments Balance Balance Value Date Transfer Date Return Date
30508148 12 98 6,493.06 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
30508191 6 98 11,976.36 55,543,903.37 55,543,903.37 85,670,000.00 06/23/2023
Total Count = 2 18,469.42 98,043,903.37 98,043,903.37 149,470,000.00
Reports Available at sf.citidirect.com v. 21.09.28 Page 24 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
HISTORICAL SPECIALLY SERVICED LOANS
April 17, 2024
Special Servicing Ending Ending Most Most Recent Most Recent Most Recent
Distribution Workout Fee Amount Scheduled Actual Recent Valuation Special Servicer Master Servicer
Date Loan ID OMCR Strategy (3) Plus Adjustments Balance Balance Value Date Transfer Date Return Date
04/17/2024 30508148 12 98 6,493.06 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
04/17/2024 30508191 6 98 11,976.36 55,543,903.37 55,543,903.37 85,670,000.00 06/23/2023
03/15/2024 30508191 6 98 11,223.76 55,632,117.98 55,632,117.98 85,670,000.00 06/23/2023
02/16/2024 30508191 6 98 12,016.67 55,731,772.09 55,819,373.95 85,670,000.00 06/23/2023
01/18/2024 30508191 6 98 12,035.47 55,819,373.95 55,819,373.95 85,670,000.00 06/23/2023
12/15/2023 30508191 6 98 11,666.59 55,906,690.10 55,906,690.10 85,670,000.00 06/23/2023
11/17/2023 30508191 6 98 12,074.14 55,999,613.25 55,999,613.25 85,670,000.00 06/23/2023
10/17/2023 30508191 6 98 11,703.90 56,086,341.54 56,086,341.54 85,670,000.00 06/23/2023
09/15/2023 30508191 6 98 12,112.57 56,178,697.59 56,178,697.59 85,670,000.00 06/23/2023
08/17/2023 30508191 6 98 12,131.05 56,264,841.78 56,350,705.01 85,670,000.00 06/23/2023
07/17/2023 30508191 6 98 5,095.48 56,350,705.01 56,442,226.55 85,670,000.00 06/23/2023
Reports Available at sf.citidirect.com v. 21.09.28 Page 25 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
UNSCHEDULED PRINCIPAL DETAIL
April 17, 2024
Liquidation / Liquid / Prepay Principal Principal Prepayment Interest Prepayment Yield Maintenance
Loan ID OMCR Prepayment Date Code (5) Collections Adjustments Excess / (Shortfall) Penalties (PPP) Penalties (YM)
No Loans with Unscheduled Principal Activity to Report.
Reports Available at sf.citidirect.com v. 21.09.28 Page 26 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
HISTORICAL UNSCHEDULED PRINCIPAL DETAIL
April 17, 2024
Distribution Liquidation / Liquid / Prepay Principal Principal Prepayment Interest Prepayment Yield Maintenance
Date Loan ID OMCR Prepayment Date Code (5) Collections Adjustments Excess / (Shortfall) Penalties (PPP) Penalties (YM)
No Loans with Unscheduled Principal Activity to Report.
Reports Available at sf.citidirect.com v. 21.09.28 Page 27 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
LIQUIDATED LOAN DETAIL
April 17, 2024
Beginning Most Liquidation Net Net Realized Date of Loss with
Scheduled Recent Sales Proceeds Liquidation Proceeds Loss to Current Current Cumulative Cumulative
Loan ID OMCR Balance Value Price Received Expense Available Trust Adj. to Loan Adj. to Loan Adj. to Loan Adj. to Trust
No Loans liquidated to Report.
Reports Available at sf.citidirect.com v. 21.09.28 Page 28 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
HISTORICAL LIQUIDATED LOAN
April 17, 2024
Beginning Most Liquidation Net Net Realized Date of Loss with
Distribution Scheduled Recent Sales Proceeds Liquidation Proceeds Loss to Current Current Cumulative Cumulative
Date Loan ID OMCR Balance Value Price Received Expense Available Trust Adj. to Loan Adj. to Loan Adj. to Loan Adj. to Trust
No Loans liquidated to Report.
Reports Available at sf.citidirect.com v. 21.09.28 Page 29 of 31 © Copyright 2024 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
CREFC® INVESTOR REPORTING PACKAGE LEGENDS
April 17, 2024
1|CREFC Investor Reporting Package Legends
Property Type (1) Workout Strategy (3) Liquidation/Prepayment Code (5)
MF Multifamily 1 Modification 1 Partial Liquidation (Curtailment)
RT Retail 2 Foreclosure 2 Payoff Prior To Maturity
HC HealthCare 3 Bankruptcy 3 Disposition / Liquidation
IN Industrial 4 Extension 4 Repurchase / Substitution
MH Mobile Home Park 5 Note Sale 5 Full Payoff At Maturity
OF Office 6 DPO 6 DPO
MU Mixed Use 7 REO 7 Liquidation prior to 7/1/2006
LO Lodging 8 Resolved 8 Payoff With Penalty
SS Self Storage 9 Pending Return to Master Servicer 9 Payoff With Yield Maintenance
SE Securities 10 Deed In Lieu of Foreclosure 10 Curtailment With Penalty
CH Cooperative Housing 11 Full Payoff 11 Curtailment With Yield Maintenance
ZZ Missing Information 12 Reps and Warranties
SF SF 13 TBD
WH Warehouse 98 Other
OT Other
Modification Code (4)
Payment Status of Loan (2)
1 Maturity Date Extension
A In Grace Period 2 Amortization Change
B Late, but less than 30 Days 3 Principal Write-Off
0 Current 4 Blank (formerly Combination)
1 30-59 Days Delinquent 5 Temporary Rate Reduction
2 60-89 Days Delinquent 6 Capitalization of Interest
3 90-120 Days Delinquent 7 Capitalization of Taxes
4 Performing Matured Balloon 8 Other
5 Non Performing Matured Balloon 9 Combination
6 121+ Days Delinquent 10 Forbearance
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Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
NOTES
April 17, 2024
No Notes available for this deal at this time.
Reports Available at sf.citidirect.com v. 21.09.28 Page 31 of 31 © Copyright 2024 Citigroup