If you see federal interest withheld from your bank account, your bank has deducted 24% of your interest earnings and sent it to the IRS under a rule called backup withholding. It happens when the IRS believes there is a problem with your taxpayer identification information or your past reporting of interest and dividend income. The money is not a penalty and it is not lost. You can recover it on your tax return, but the deductions will continue on every payment until you fix the underlying problem with your bank.
What Backup Withholding Is
Normally, banks and brokerages pay you the full amount of interest you earn and report that income to the IRS on Form 1099-INT. You handle the tax when you file. Backup withholding reverses that. The institution pulls a flat 24% off the top and sends it directly to the Treasury before you see the rest.1Internal Revenue Service. Backup Withholding
Once triggered, the withholding covers all reportable payments on the affected account, including dividends and certain other income types, not just future interest. Your bank has no discretion to waive it. It continues until you provide the paperwork that resolves the problem or the IRS tells the payer to stop.1Internal Revenue Service. Backup Withholding
Why Your Bank Started Withholding
Backup withholding is triggered by one of four specific compliance failures. Identifying yours matters because the fix is different for each.
- You never provided a Taxpayer Identification Number. If you opened the account without giving a Social Security number, or wrote “Applied For” and never followed up within 60 days, the bank must start withholding.2Internal Revenue Service. Instructions for the Requester of Form W-9
- Your TIN does not match IRS records. The IRS cross-references the name-and-number combination your bank reported against its master file. A mismatch causes the IRS to send the payer a CP2100 or CP2100A notice, and the payer then sends you what is called a B Notice asking you to correct the information.3Internal Revenue Service. Understanding Your CP2100 or CP2100A Notice
- You never certified your TIN. Even if the bank has your number, you also have to sign a Form W-9 certifying under penalty of perjury that it is correct. With no signed W-9 on file, withholding is mandatory.4Internal Revenue Service. Withholding and Reporting Obligations
- The IRS flagged you for underreporting. If you previously failed to report all your interest or dividend income on a return, the IRS can direct your payers to withhold. This is the most serious trigger and involves a separate resolution process with the IRS.
The first three are paperwork problems. The fourth involves a tax history problem, and the fix is longer.
TIN Mismatches (B Notices)
A mismatch is the most common cause. A name change after marriage, a typo when the account was opened, or a transposed digit in your SSN can all trigger one. When the IRS notifies your bank of the mismatch, the bank sends you a B Notice. What it asks for depends on whether it is the first or the second such notice for that account.
For a first B Notice, you complete and return a signed Form W-9 with your correct TIN. If you do not respond, the bank must begin withholding no later than 30 business days after it received the IRS notice.3Internal Revenue Service. Understanding Your CP2100 or CP2100A Notice
For a second B Notice, meaning the same account showed up again within three years, a W-9 is not enough. You must provide a copy of your Social Security card or an IRS Letter 147C verifying the name-and-number combination.5Internal Revenue Service. Backup Withholding “B” Program If your name genuinely does not match what the Social Security Administration has on file, because of a legal name change for example, update your records with the SSA and get a corrected card before the bank can resolve the mismatch.
Underreporting (C Notices)
The underreporting trigger uses a different process. Before your payers are ever told to withhold, the IRS sends you a series of at least four notices over a period of at least 120 days, giving you a chance to correct the issue. If you ignore all of them, the final notice warns that withholding is about to begin, and the IRS contacts your payers directly.6Internal Revenue Service. Backup Withholding “C” Program
Once C-Notice withholding starts, a Form W-9 will not stop it. You have to resolve the underlying tax problem, usually by filing amended or delinquent returns and paying what you owe. Once the IRS is satisfied, it issues a CP542 notice confirming you are no longer subject to backup withholding and notifies your payers to stop. If your payers do not receive the CP542 directly from the IRS, you need to give them a copy by December 31 of that year, and the payer then has 30 days to stop withholding.7Internal Revenue Service. Understanding Your CP542 Notice This is where a lot of people get stuck. They fix things with the IRS but forget to close the loop with the bank, and withholding continues for months.
How to Stop the Withholding
Match the fix to the trigger.
- Missing TIN or no signed certification on file: submit a completed, signed Form W-9 to the financial institution. The bank must stop withholding within 30 calendar days of receiving it.7Internal Revenue Service. Understanding Your CP542 Notice
- First B Notice: submit a corrected, signed Form W-9. Same 30-day timeline.
- Second B Notice: provide your Social Security card or an IRS Letter 147C to the payer. A W-9 by itself is not sufficient.5Internal Revenue Service. Backup Withholding “B” Program
- C Notice underreporting: resolve the tax issue with the IRS, obtain a CP542 stop-withholding notice, and deliver a copy to each affected financial institution.7Internal Revenue Service. Understanding Your CP542 Notice
Your bank will not stop withholding based on a phone call. It needs written documentation, either a completed W-9, your Social Security card, or an official IRS notice. If you are unsure which trigger applies to your account, call the bank and ask whether it received a B Notice, a C Notice, or simply never had a W-9 on file. That answer tells you exactly what to submit.
Getting the Withheld Money Back
The 24% is not a fee. It is a prepayment of your federal income tax, and you can claim every dollar of it when you file your return. Your bank reports the withheld amount in Box 4 of Form 1099-INT, which you should receive by the end of January for the prior tax year.8Internal Revenue Service. Form 1099-INT – Interest Income
On Form 1040, report the full amount of interest you earned before withholding on the interest income line. If your total interest for the year exceeds $1,500, complete Schedule B as well.9Internal Revenue Service. About Schedule B (Form 1040), Interest and Ordinary Dividends Then enter the amount from Box 4 of your 1099-INT on Line 25b of Form 1040, where federal income tax withheld from 1099 forms is reported.10Internal Revenue Service. Instructions 1040
That amount is added to your W-2 withholding, estimated payments, and any other tax already paid during the year. If the total exceeds what you owe, the difference comes back as a refund. If your other income was modest, you may recover the entire withheld amount.
One catch. You have to actually file a return to get the money back. If you do not file, the IRS keeps the withheld funds. Even if your income is low enough that filing is otherwise optional, backup withholding is a strong reason to file anyway.11Internal Revenue Service. Topic No. 307, Backup Withholding
If You Are Not a U.S. Person
If you are a nonresident alien, the deductions on your account are probably not backup withholding at all. The 24% backup rate generally applies only to U.S. persons.12Internal Revenue Service. Tax Withholding Types Nonresident aliens fall under a separate regime with a default 30% rate on U.S.-source interest, which can often be reduced by submitting Form W-8BEN to claim tax treaty benefits. If that is your situation, ask your bank whether it has a valid W-8BEN on file rather than a W-9. The W-9 route described above does not apply to you.