All customers of Coinbase, Inc. are required to submit their IRS Form W-9 with Coinbase by January 1, 2027, per new IRS tax reporting regulations.
Form W-9 allows US persons to provide and certify their Taxpayer Identification Number (TIN) or Social Security Number (SSN), name, address, and exemption from backup withholding
For tax purposes, US persons are citizens of the United States or persons who meet either the green card test or substantial presence test for the calendar year
IRS Form W-8 information for the Retail Tax Center will be available for Non US persons to electronically verify in 2026. Please work with your local tax advisor if you are a non-U.S. person filing a U.S. tax return.
Coinbase uses this information to report taxable income to the IRS when required. Ensuring this information is correct helps prevent tax reporting issues.
If the information you used to create a Coinbase account doesn’t match the information on your Form W-9, you’ll need to make corrections and submit your form for reverification.
Common reasons for re-verification include:
Name mismatch – Your name must match the Social Security Administration (SSA) or IRS records, including suffixes (e.g., "Jr." or "III")
Incorrect TIN – Your TIN must match the SSA or IRS records
Visit IRS.gov for more information, including how to contact the Social Security Administration.
Verify your Form W-9
To verify your form W-9 information:
Go to Coinbase Taxes.
Select Settings.
In the Tax status section, select Verify your info.
Submit your information and select Continue.
Review the Confirm tax information page and select Agree. This will start the review process, which can take up to 48 hours.
If you enter any of your information incorrectly, fill out the verification form again after the review period.
Backup withholding
Starting January 1, 2027, you will be subject to backup withholding if you have not verified your Form W-9 with Coinbase, as mandated by the IRS.
Backup withholding requires financial institutions to withhold a portion of payments to certain customers and remit it to the IRS. The rate is currently 24% on all proceeds, with some states requiring an additional percentage.
Prevent backup withholding by verifying your Form W-9.
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