Summary Prospectus by Investment Company (Form 497K)

Summary Prospectus December 1, 2021 American Century Investments® One Choice® Blend+ 2055 Portfolio
Investor Class: AADVX I Class: AADWX	A Class: AADZX R Class: AAEDX	R6 Class: AAEEX

	Before you invest, you may want to review the fund's prospectus, which contains more information about the fund and its risks. You can find the fund's prospectus, reports to shareholders, and other information about the fund online at the web addresses listed below. You can also get this information at no cost by calling or sending an email request. The fund's prospectus and other information are also available from financial intermediaries (such as banks and broker-dealers) through which shares of the fund may be purchased or sold.
	Retail Investors americancentury.com/docs 1-800-345-2021 or 816-531-5575 [email protected]	Financial Professionals americancentury.com/fadocs 1-800-345-6488 [email protected]
	This summary prospectus incorporates by reference the fund's prospectus and statement of additional information (SAI), each dated December 1, 2021 (as supplemented at the time you receive this summary prospectus), as well as the Report of Independent Registered Public Accounting Firm and the financial statements included in the fund's annual report to shareholders, dated July 31, 2021. The fund's SAI and annual report may be obtained, free of charge, in the same manner as the prospectus.

Investment Objective

The fund seeks the highest total return consistent with its asset mix.

Fees and Expenses

The following table describes the fees and expenses you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in American Century Investments funds. More information about these and other discounts is available from your financial professional and in Calculation of Sales Charges on page 66 of the fund's prospectus, Appendix A of the fund's prospectus and Sales Charges in Appendix B of the statement of additional information.

Shareholder Fees (fees paid directly from your investment)
	Investor	I	A	R	R6
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	None	None	5.75%	None	None
Maximum Deferred Sales Charge (Load) (as a percentage of the lower of the original offering price or redemption proceeds when redeemed within one year of purchase)	None	None	None¹	None	None
Maximum Annual Account Maintenance Fee (waived if eligible investments total at least $10,000)	$25	None	None	None	None

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
	Investor	I	A	R	R6
Management Fee	0.58%	0.38%	0.58%	0.58%	0.23%
Distribution and Service (12b-1) Fees	None	None	0.25%	0.50%	None
Other Expenses2	0.00%	0.00%	0.00%	0.00%	0.00%
Total Annual Fund Operating Expenses	0.58%	0.38%	0.83%	1.08%	0.23%

1 Purchases of $1 million or more may be subject to a contingent deferred sales charge of 1.00% if the shares are redeemed within one year of the date of the purchase.

2 Other Expenses are based on estimated amounts for the current fiscal year.

Example

The example below is intended to help you compare the costs of investing in the fund with the costs of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods, that you earn a 5% return each year, and that the fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

	1 year	3 years
Investor Class	$59	$186
I Class	$39	$122
A Class	$655	$825
R Class	$110	$344
R6 Class	$24	$74

Portfolio Turnover

Because the fund buys and sells shares of other American Century mutual funds directly from the issuers, the fund is not expected to incur transaction costs directly other than transaction costs associated with purchasing exchange-traded funds. However, as a shareholder in the underlying mutual funds, the fund indirectly pays transaction costs, such as commissions, when the underlying mutual funds buy and sell securities (or "turn over" their portfolios). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. For the period from March 10, 2021, the fund's inception, to the fiscal year ended July 31, 2021, the fund's portfolio turnover rate was 10% of the average value of its portfolio.

Principal Investment Strategies

One Choice Blend+ 2055 Portfolio is a "fund of funds," meaning that it seeks to achieve its objective by investing in other mutual funds and exchange-traded funds (ETFs) advised by American Century (collectively, the underlying funds) that represent a variety of asset classes and investment styles. The underlying stock funds draw on growth, value and quantitative investment techniques and diversify investments among small, medium and large U.S. and foreign companies. The underlying bond funds invest in fixed-income securities that vary by issuer type (corporate and government), credit quality (investment-grade and high-yield or "junk bonds") and geographic exposure (domestic and international). Short-term investments include underlying funds that invest in fixed-income or debt instruments and have a shorter-term weighted average duration, typically three years or less. The following table indicates the fund's neutral mix; that is, how the fund's investments generally will be allocated among the major asset classes. The table also shows the neutral weightings of each underlying fund currently being used within the various asset classes. This information is as of the date of this prospectus.

Equity Securities (Stock Funds)	88.51	%
Focused Dynamic Growth Fund	14.20	%
Avantis U.S. Equity Fund	21.54	%
American Century Low Volatility ETF	0.00	%
NT Focused Large Cap Value Fund	14.20	%
NT Heritage Fund	3.41	%
NT Mid Cap Value Fund	3.41	%
Small Cap Growth Fund	1.93	%
Avantis U.S. Small Cap Value Fund	1.93	%
Focused International Growth Fund	4.43	%
Avantis International Equity Fund	7.92	%
Non-U.S. Intrinsic Value Fund	4.43	%
NT International Small-Mid Cap Fund	1.81	%
NT Emerging Markets Fund	3.98	%
Avantis Emerging Markets Equity Fund	2.66	%
NT Global Real Estate Fund	2.66	%

Fixed-Income Securities (Bond Funds)	11.49	%
Avantis Core Fixed Income Fund	6.20	%
Global Bond Fund	2.30	%
NT High Income Fund	1.57	%
Emerging Markets Debt Fund	0.85	%
Short Duration Inflation Protection Bond Fund	0.00	%
Inflation-Adjusted Bond Fund	0.57	%
Short-Term Investments (Short-Term Funds)	0.00	%

The target date in the fund name (2055) refers to the approximate year an investor plans to retire and likely would stop making new investments in the fund. The target date does not necessarily represent the specific year you expect to need your assets. It is intended only as a general guide and assumes a retirement age of 65. The fund may not be appropriate for an investor who plans to retire at or near the target date, but at an age well before or after 65. The fund is designed for investors who plan to withdraw the value of their account gradually after retirement. Over time, the fund's neutral mix will become more conservative by decreasing the allocation to stocks and increasing the allocation to bonds and short-term investments. The fund will reach its most conservative allocation approximately five years after the target date, at which point its neutral mix is expected to become fixed at 40% stock funds, 54% bond funds and 6% short-term funds. The following chart shows how the neutral mix is expected to change over time according to a predetermined glide path.

The portfolio managers regularly review the fund's allocations to determine whether rebalancing is appropriate. In order to better balance risks in changing market environments, the portfolio managers may make modest deviations from the neutral mix in light of prevailing market conditions. We reserve the right to modify the neutral mix and underlying funds from time to time should circumstances warrant a change.

Principal Risks

•Allocation Risk - The fund's performance and risks depend in part on the managers' skill in determining the fund's neutral mix, selecting and weighting the underlying funds, and implementing any deviations from the neutral mix. The managers' evaluations and assumptions regarding asset classes or underlying funds may differ from actual market conditions.

•Fund of Funds Risks - The fund's performance and risks reflect the performance and risks of the underlying American Century Investments funds in which it invests. The fund's investment in other American Century Investments funds may create a conflict of interest for the fund's advisor.

•"Growth" and "Value" Style Risks - The underlying funds represent a mix of investment styles, each of which has risks associated with it. Growth stocks can be volatile and may lack dividends that can cushion share prices during market declines. Value stocks may continue to be undervalued by the market for long periods of time.

•Small- and Mid-Cap Stock Risks - Stocks of smaller companies may be more volatile than larger-company stocks. Smaller companies may have limited financial resources, product lines and markets, and their securities may trade less frequently and in more limited volumes than the securities of larger companies, which could lead to higher transaction costs. To the extent an underlying fund invests in these companies, it may take on more risk.

•Interest Rate Risk - Generally, when interest rates rise, the value of an underlying fund's fixed-income securities will decline. The opposite is true when interest rates decline. Underlying funds with longer weighted average maturities are more sensitive to interest rate changes. A period of rising interest rates may negatively affect the performance of underlying fixed-income funds.

•Credit Risk - The value of an underlying fund's fixed-income securities will be affected adversely by any erosion in the ability of the issuers of these securities to make interest and principal payments as they become due. Changes in the credit rating of a fixed-income security held by an underlying fund could have a similar effect.

•Foreign Securities Risk - Some of the underlying funds invest in foreign securities, which are generally riskier than U.S. securities. Political events, social and economic events, natural disasters and public health emergencies occurring in a country where the fund invests could cause the fund's investments in that country to experience gains or losses. Securities of foreign issuers may be less liquid, more volatile and harder to value than U.S. securities. Fluctuations in currency exchange rates also may affect an underlying fund's share price.

•Emerging Market Risk -Investing in securities of companies located in emerging market countries generally is also riskier than investing in securities of companies located in foreign developed countries. Emerging market countries may have unstable governments and/or economies that are subject to sudden change. These changes may be magnified by the countries' emergent financial markets, resulting in significant volatility to investments in these countries.

•Market Risk - The value of the fund's shares will go up and down based on the performance of the underlying funds in which it invests. The value of the underlying funds' shares will, in turn, fluctuate based on the performance of the securities they own and other factors generally affecting the securities market. Market risks, including political, regulatory, economic and social developments, can affect the value of the fund's investments. Natural disasters, public health emergencies, terrorism and other unforeseeable events may lead to increased market volatility and may have adverse long-term effects on world economies and markets generally.

•Public Health Emergency Risk - A pandemic, caused by the infectious respiratory illness COVID-19, is causing market disruption and other economic impacts. Markets have experienced volatility, reduced liquidity, and increased trading costs. These events may continue to impact the fund and its underlying funds.

•Principal Loss Risk - At any given time your shares may be worth less than the price you paid for them. In other words, it is possible to lose money by investing in the fund, including losses near to, at, or after retirement. There is no guarantee that the fund will provide adequate income at or through your retirement.

An investment in the fund is not a bank deposit, and it is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.

Fund Performance

Because the fund is new, the fund does not have performance history as of the date of this prospectus. When the fund has investment results for a full calendar year, this section will feature charts that show annual total returns, highest and lowest quarterly returns and average annual total returns for the fund. This information indicates the volatility of the fund's historical returns from year to year.

Performance information is designed to help you see how fund returns can vary. Keep in mind that past performance (before and after taxes) does not predict how the fund will perform in the future.

For current performance information, please visit americancentury.com.

Portfolio Management

Investment Advisor

American Century Investment Management, Inc.

Portfolio Managers

Richard Weiss, Chief Investment Officer - Multi-Asset Strategies, Senior Vice President and Senior Portfolio Manager, has been a member of the team that manages the One Choice Blend+ Portfolios since 2021.

Radu Gabudean, Vice President, Portfolio Manager and Head of Research, Multi-Asset Strategies, has been a member of the team that manages the One Choice Blend+ Portfolios since 2021.

Vidya Rajappa, CFA, Vice President, Portfolio Manager and Head of Portfolio Management, Multi-Asset Strategies, has been a member of the team that manages the One Choice Blend+ Portfolios since 2021.

Scott Wilson, CFA, Vice President and Portfolio Manager, has been a member of the team that manages the One Choice Blend+ Portfolios since 2021.

John Donner, Portfolio Manager and Senior Quantitative Analyst, has been a member of the team that manages the One Choice Blend+ Portfolios since 2021.

Purchase and Sale of Fund Shares

You may purchase or redeem shares of the fund on any business day through our website at americancentury.com, in person (at one of our Investor Centers), by mail (American Century Investments, P.O. Box 419200, Kansas City, MO 64141-6200), by telephone at 1-800-345-2021 (Investor Services Representative) or 1-800-345-3533 (Business, Not-For-Profit and Employer-Sponsored Retirement Plans), or through a financial intermediary. Shares may be purchased and redemption proceeds received by electronic bank transfer, by check or by wire.

Unless otherwise specified below, the minimum initial investment amount to open an account is $2,500 ($1,000 for Coverdell Education Savings Accounts and IRAs). However, American Century Investments will waive the fund minimum if you make an initial investment of at least $500 and continue to make automatic investments of at least $100 a month until reaching the fund minimum. Investors opening accounts through financial intermediaries may open an account with $250 for Investor, A and R Classes, but the financial intermediaries may require their clients to meet different investment minimums. The minimum may be waived for broker-dealer sponsored wrap program accounts, fee based accounts, and accounts through bank/trust and wealth management advisory organizations.

The minimum initial investment amount for I Class is generally $5 million ($3 million for endowments and foundations), but the minimum may be waived if you have an aggregate investment in the American Century family of funds of $10 million or more ($5 million for endowments and foundations). This includes accounts held directly with American Century and those held through a financial intermediary.

There is no minimum initial investment amount for R6 Class shares.

For all share classes, there is no minimum initial investment amount for certain employer-sponsored retirement plans, however, financial intermediaries or plan recordkeepers may require plans to meet different minimums. There is a $50 minimum for subsequent purchases, except that there is no subsequent purchase minimum for financial intermediaries or employer-sponsored retirement plans.

Tax Information

Fund distributions are generally taxable as ordinary income or capital gains, unless you are investing through a tax-deferred account such as a 401(k) or individual retirement account (in which case you may be taxed upon withdrawal of your investment from such account).

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase the fund through a broker-dealer or other financial intermediary (such as a bank, insurance company, plan sponsor or financial professional), the fund and its related companies may pay the intermediary for the sale of fund shares and related services in all classes except the R6 Class. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the fund over another investment. Ask your salesperson or visit your financial intermediary's website for more information.

©2021 American Century Proprietary Holdings, Inc. All rights reserved.

CL-SUM-96751 2121

Public link

Please use the above public link if you want to share this noodl on another website.