If federal tax is being withheld from your savings account, it’s almost certainly backup withholding, a 24% deduction your bank is legally required to apply when there’s a problem with the taxpayer identification number on your account or when the IRS has specifically ordered it.1Internal Revenue Service. Backup Withholding Banks don’t ordinarily withhold anything from interest payments the way an employer withholds from wages. Interest normally arrives in your account in full, and you settle the tax later on your return. Backup withholding is the one situation that changes that, and every case traces back to identity verification or a prior tax compliance issue.
What Backup Withholding Actually Is
Backup withholding takes a flat 24% out of your interest before the bank credits the rest to your account.2Internal Revenue Service. Topic No. 307, Backup Withholding The money goes directly to the IRS. It isn’t a penalty in the legal sense, but it operates like one: the tax gets pulled from every reportable interest payment until you resolve whatever triggered it. The rate doesn’t move with your tax bracket. It’s 24% regardless of who you are or what you actually owe.
The Four Triggers
Federal law defines exactly four circumstances that require a bank to begin backup withholding.3Office of the Law Revision Counsel. 26 USC 3406 – Backup Withholding Identifying which one applies to you is the first step, because the fix is different for each.
You Didn’t Give the Bank a TIN
When you open an account, the bank asks you to provide your Social Security number (or other taxpayer identification number) on Form W-9 and certify it.4Internal Revenue Service. About Form W-9, Request for Taxpayer Identification Number and Certification If that step was skipped or the number is missing, the bank has to start withholding right away.5Internal Revenue Service. Backup Withholding B Program This is the most common trigger and the easiest to resolve.
Your TIN Doesn’t Match IRS Records
You may have given the bank a number that doesn’t match the name the IRS has on file, often because of a name change, a typo, or a mismatched hyphen. When the bank files its 1099-INT and the IRS spots the discrepancy, the IRS sends the bank a CP2100 or CP2100A notice. The bank then mails you a “B-Notice.”5Internal Revenue Service. Backup Withholding B Program
A First B-Notice comes with a blank W-9. You fill it in with the correct number and send it back. If the same mismatch reappears within three years, a Second B-Notice arrives and requires stronger proof: a copy of your Social Security card or IRS Letter 147C confirming that the name and number match.5Internal Revenue Service. Backup Withholding B Program Withholding continues until the bank has the paperwork it needs.
You Didn’t Sign the Certification
The W-9 doesn’t only collect your number. It also requires you to certify, under penalty of perjury, that the number is correct and that you’re not already subject to backup withholding. Providing the number but refusing to sign is grounds for the bank to withhold.3Office of the Law Revision Counsel. 26 USC 3406 – Backup Withholding
The IRS Says You Underreported Interest or Dividends
If the IRS determines you underreported interest or dividend income on a prior return, it can order backup withholding directly. The IRS notifies both you and your bank that withholding must begin.1Internal Revenue Service. Backup Withholding This is the hardest trigger to lift, because the bank has no authority to stop on its own. Only the IRS can end it.
How to Stop the Withholding
The right fix depends on which trigger started the deduction. Getting the wrong document to the wrong place won’t help.
If the problem is a missing TIN or an unsigned certification, submit a complete, signed W-9 to the bank. Once processed, withholding stops. The bank is allowed up to 30 additional days to update its payment systems after receiving your form.3Office of the Law Revision Counsel. 26 USC 3406 – Backup Withholding
If you received a B-Notice, respond with exactly what the notice asks for. A corrected W-9 clears a First B-Notice. A Second B-Notice needs your Social Security card copy or Letter 147C.5Internal Revenue Service. Backup Withholding B Program Ignoring a B-Notice doesn’t buy time. It forces the bank to start or continue withholding, and the second round demands the harder documentation.
If the withholding stems from an IRS underreporting determination, you have to work through the IRS. That can mean paying the assessed tax, showing that no underreporting actually occurred, filing an amended return to correct it, or demonstrating that continued withholding would cause undue hardship and that you’re unlikely to underreport again.6eCFR. 26 CFR 35a.3406-2 – Imposition of Backup Withholding for Notified Payee Underreporting After the IRS makes a favorable determination, it issues you a written certification and notifies the bank to stop. Your bank cannot lift the withholding without that IRS notice.
You Get the Withheld Money Back on Your Return
Backup withholding isn’t lost money. It works exactly like the federal tax your employer withholds from a paycheck: a prepayment against your annual tax bill. The bank reports the total interest paid and the tax withheld on Form 1099-INT, with the withheld amount in Box 4 labeled “Federal income tax withheld.”7Internal Revenue Service. Instructions for Forms 1099-INT and 1099-OID You claim it on your return as federal income tax already paid.2Internal Revenue Service. Topic No. 307, Backup Withholding
Because the withholding runs at a flat 24%, it usually doesn’t line up with your actual tax bracket. Someone in the 12% bracket who had $5,000 of interest hit with backup withholding would see $1,200 taken but owe roughly $600 in tax on that interest, with the other $600 refunded. In the 32% or 35% bracket, the opposite applies: the 24% won’t fully cover what’s owed, and you’ll pay the difference at filing.
If Nothing Is Being Withheld, You Still Owe the Tax
Most people never see backup withholding. The interest arrives in full, and no tax goes to the IRS from the bank. That doesn’t mean the income is untaxed. You owe ordinary income tax on savings interest, and if you owe enough overall, the IRS expects you to pay through the year rather than at filing.
Estimated tax payments are generally required if you expect to owe $1,000 or more after all withholding and refundable credits.8Internal Revenue Service. Form 1040-ES, Estimated Tax for Individuals You can avoid the underpayment penalty by paying at least 90% of the current year’s tax or 100% of the prior year’s tax (110% if your prior-year adjusted gross income exceeded $150,000).9Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty
If you have a regular paycheck, the simpler route is to raise your withholding on Form W-4 so your employer covers the tax on your interest for you.10Internal Revenue Service. Tax Withholding That saves you from mailing quarterly payments and works well when your interest income is predictable.
The Same Trigger Can Hit Your Other Accounts
Backup withholding attaches to the taxpayer, not just the savings account. The same 24% applies to most 1099-reportable income when the same TIN or certification problem exists, including dividends, broker transactions, rents, royalties, freelance and gig income, payment card transactions, certain government payments, and gambling winnings.1Internal Revenue Service. Backup Withholding If backup withholding started on your savings account because of a TIN issue, expect the same problem to surface anywhere else your Social Security number is on file. Fixing the underlying record clears them together.