If federal tax was withheld on your savings account interest, it’s almost certainly backup withholding: a flat 24% that your bank is required to deduct when something has gone wrong with your taxpayer information or your prior tax filings. Regular savings accounts don’t have tax taken out. When they do, it’s because one of a short list of compliance triggers has been pulled. The money isn’t lost. You’ll claim it as a credit when you file, and once you fix the underlying problem, the withholding stops.
Why Your Bank Is Withholding 24%
Backup withholding is set by federal law at a flat 24% rate, and it applies regardless of your actual tax bracket.1Office of the Law Revision Counsel. 26 USC 3406 – Backup Withholding For someone in the 12% bracket, that’s a heavy over-withholding. For someone in the 32% bracket, it’s actually less than they’d owe. Either way, the math evens out when you file.
There are four things that can trigger it:
- You never gave the bank a Social Security number, or the one on file doesn’t match IRS records.
- The IRS told the bank your taxpayer identification number (TIN) is wrong, through what’s called a CP2100 or CP2100A notice.2Internal Revenue Service. Backup Withholding B Program
- The IRS determined that you underreported interest or dividend income on a past return and instructed the bank to start withholding.
- You didn’t return a Form W-9 the bank asked you to sign, certifying your TIN and that you aren’t currently subject to backup withholding.3Internal Revenue Service. About Backup Withholding
For most people, it’s a TIN mismatch. A name change after marriage, a typo on the original account application, or a data entry error at the bank will do it. The next most common cause is a W-9 request that never got returned. If your bank started withholding after mailing you a form or a “B Notice,” that’s the trail.
When the IRS flags an underreporting problem, the process is slower. You get at least four notices over a minimum of 120 days before the withholding order ever reaches the bank.4eCFR. 26 CFR 35a.3406-2 – Imposition of Backup Withholding for Notified Payee Underreporting So if this is the cause, you’ll usually know. If none of those notices rings a bell, the trigger is almost certainly on the TIN side.
How to Get the Withheld Money Back
Your bank reports the withholding to both you and the IRS on Form 1099-INT. Box 1 shows the interest you earned for the year. Box 4, labeled “Federal income tax withheld,” shows what was taken out.3Internal Revenue Service. About Backup Withholding The IRS gets an identical copy of that form.
When you file, that Box 4 amount goes on Line 25b of Form 1040.5Internal Revenue Service. 1040 (2025) Instructions That’s the line for federal tax withheld from 1099 forms, separate from paycheck withholding on Line 25a. Both work the same way: they’re refundable credits that reduce your total tax bill dollar for dollar. If the credits add up to more than you owe, the excess comes back as a refund.
A quick example. Say you earned $833 in savings interest and the bank withheld 24%, or $200. If your actual bracket is 12%, you only owed about $100 in tax on that income. The other $100 comes back to you at filing time, either lowering your bill or increasing your refund.
If you have multiple accounts or multiple payers, gather every 1099 that has a Box 4 amount. The number you report needs to match what the IRS already has on file from those payers.
One quiet advantage worth knowing: federal withholding is generally treated as paid evenly across the year for penalty purposes. So even if all of it happened in December, the IRS counts it as if it had been spread across four quarters. Estimated payments don’t get that treatment.
How to Stop the Withholding Going Forward
Claiming the credit gets your money back for the year that’s already passed. To stop the 24% from coming out of future interest, you have to fix whatever caused it.
If the Problem Is Your TIN
For a first B Notice from your bank, the fix is a completed and signed Form W-9 with your correct Social Security number.6Internal Revenue Service. About Form W-9, Request for Taxpayer Identification Number and Certification Once the bank validates it, backup withholding must stop within 30 days.7eCFR. 26 CFR 31.3406(e)-1 – Period During Which Backup Withholding Is in Effect
If this is the second B Notice on the same account, a W-9 alone isn’t enough. You’ll need to give the bank either a copy of your Social Security card or an IRS Letter 147C confirming your name and number.2Internal Revenue Service. Backup Withholding B Program The IRS wants independent verification the second time around, not another self-certification.
If the Problem Is Underreported Income
Here the instruction to withhold came from the IRS, so only the IRS can call it off. You’ll need to file any missing returns or amend earlier ones to correctly report the interest and dividend income the IRS says you left off. You don’t need to write or call separately once the corrected return is in.8Internal Revenue Service. Backup Withholding C Program
After the IRS processes what you filed and confirms you’re no longer liable, it notifies the bank to stop.8Internal Revenue Service. Backup Withholding C Program The bank can’t act on its own. Expect a lag: your return has to be processed, and then the stop notice has to travel from the IRS to your bank. Check your statements over the next few months. If the 24% is still coming out after a reasonable window, follow up with both.
Don’t Try to Certify Your Way Out
Every Form W-9 you sign is a certification under penalties of perjury that your TIN is correct and that you aren’t currently subject to backup withholding. If you know you are subject to it and sign the form saying otherwise, that’s a $500 civil penalty per false statement under Internal Revenue Code Section 6682, on top of any tax still owed.9Office of the Law Revision Counsel. 26 U.S. Code 6682 – False Information With Respect to Withholding Willful false statements can carry criminal penalties under separate perjury statutes.
There’s no reason to take that risk. The withholding isn’t a tax you’re paying twice. Whatever the bank takes above your actual liability comes back to you when you file. Fix the underlying issue, claim the credit on Line 25b, and the account returns to normal.