Form FWP BENCHMARK 2021-B31 MORTG Filed by: CITIGROUP COMMERCIAL MORTGAGE SECURITIES INC

From: Citi Cmbs Syndicate (CITIGROUP GLOBAL MAR) At: 12/02/21 11:33:21 UTC-5:00

Subject: BMARK 2021-B31 -- New Issue Announcement (Public)

BMARK 2021-B31 -- New Issue Announcement (Public)

Co-Lead Managers & Joint Bookrunners: Citigroup, J.P. Morgan, Deutsche Bank Securities, Goldman Sachs & Co. LLC

Co-Managers: Academy Securities Inc. & Drexel Hamilton

*Class sizes and/or WALs subject to change as detailed in the term sheet. Possible

ranges below:

Term Sheet

<Attached>

Annex A-1

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THE SECURITIES OFFERED BY THESE MATERIALS ARE BEING OFFERED WHEN, AS AND IF ISSUED. THIS FREE WRITING PROSPECTUS IS NOT AN OFFER TO SELL OR A SOLICITATION OF AN OFFER TO BUY THESE SECURITIES IN ANY STATE OR OTHER JURISDICTION WHERE SUCH OFFER, SOLICITATION OR SALE IS NOT PERMITTED. THESE SECURITIES DO NOT REPRESENT AN INTEREST IN OR OBLIGATION OF THE DEPOSITOR, THE SPONSORS, THE ORIGINATORS, THE MASTER SERVICER, THE SPECIAL SERVICER, THE TRUSTEE, THE CERTIFICATE ADMINISTRATOR, THE OPERATING ADVISOR, THE ASSET REPRESENTATIONS REVIEWER, ANY DIRECTING HOLDER, ANY RISK RETENTION CONSULTATION PARTY, THE COMPANION LOAN HOLDERS (OR THEIR REPRESENTATIVES), THE UNDERWRITERS OR ANY OF THEIR RESPECTIVE AFFILIATES. NEITHER THESE SECURITIES NOR THE MORTGAGE LOANS ARE INSURED OR GUARANTEED BY ANY GOVERNMENTAL AGENCY OR INSTRUMENTALITY OR PRIVATE INSURER.

The depositor has filed a registration statement (including a prospectus) with the Securities and Exchange Commission (“SEC”) (SEC File No. 333-228597) for the offering to which this communication relates. Before you invest, you should read the prospectus in the registration statement and other documents the depositor has filed with the SEC for more complete information about the depositor, the issuing entity and this offering. You may get these documents for free by visiting EDGAR on the SEC website at www.sec.gov. Alternatively, the depositor or any underwriter or dealer participating in this offering will arrange to send you the prospectus if you request it by calling toll-free 1-800-831-9146.

Any legends, disclaimers or other notices that may appear at the bottom of the email communication to which this free writing prospectus is attached relating to (1) these materials not constituting an offer (or a solicitation of an offer), (2) no representation being made that these materials are accurate or complete and that these materials may not be updated or (3) these materials possibly being confidential, are, in each case, not applicable to these materials and should be disregarded. Such legends, disclaimers or other notices have been automatically generated as a result of these materials having been sent via Bloomberg or another system.

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