Backup withholding is a tax collection tool the IRS uses when you don't provide a correct taxpayer ID number or when you underreport income on certain accounts

Backup withholding is a mandatory 24% tax withholding that the IRS requires financial institutions, employers, and other payers to take from your income or account withdrawals. It is not a penalty — it is a collection mechanism. The IRS imposes it when you either fail to provide a correct Social Security number or employer ID number (called a TIN, or taxpayer identification number), or when the IRS has notified a payer that you have underreported income from that source in the past.

The 24% rate is fixed by federal law and does not change based on your actual tax bracket. The money withheld goes to the IRS as a credit against your tax liability for that year. If too much is withheld, you can claim it back when you file your tax return. If too little is withheld, you will owe the difference.

Key Takeaways

  • Backup withholding is triggered when you do not provide a valid TIN to a payer, or when the IRS notifies a payer that you have underreported income from that account or source.
  • The withholding rate is always 24%, regardless of your tax bracket, and applies to interest, dividends, broker proceeds, gambling winnings, and certain other payments.
  • You can stop backup withholding by providing a correct TIN or by resolving the underreporting issue with the IRS, usually through amended returns or payment arrangements.
  • Backup withholding does not appear on your W-2 or 1099 forms in the normal way — it is reported separately, and you must track it to claim it as a credit on your return.

When the IRS orders backup withholding to start

Backup withholding begins in two main scenarios. The first is when you fail to provide a TIN or provide an incorrect one. Banks, brokerages, and employers are required to ask for your Social Security number or EIN before opening an account or processing payments. If you refuse or give a wrong number, they must report this to the IRS and begin withholding 24% from any payments made to you.

The second scenario occurs when the IRS has reason to believe you have underreported income. This typically happens when a payer (such as a bank paying interest, a brokerage paying dividends, or a business paying you for services) reports income to the IRS on a Form 1099, but you do not report the same amount on your tax return. The IRS cross-checks these reports. If there is a mismatch, the IRS can send a notice to the payer instructing them to begin backup withholding on future payments to you.

You will usually receive a notice from the IRS before backup withholding starts, but not always. Some payers begin withholding immediately upon receiving an IRS notice. Others send you a warning first. The rules vary by payer type.

Which payments are subject to backup withholding

Backup withholding applies to a specific list of payments. These include interest paid by banks, dividends from stocks or mutual funds, broker commissions and proceeds from the sale of securities, payments for services (such as consulting or freelance work reported on a Form 1099-NEC or 1099-MISC), gambling winnings, and certain government payments such as unemployment benefits or state tax refunds.

Backup withholding does not apply to wages paid by an employer on a W-2, because employers already withhold income tax through the normal payroll system. It also does not apply to Social Security benefits, federal tax refunds, or certain other government payments.

If you receive multiple payments from the same payer during a year, the 24% withholding applies to each payment. This can add up quickly, especially if you have significant investment income or freelance earnings.

How to stop backup withholding

To stop backup withholding, you must address the underlying cause. If the issue is a missing or incorrect TIN, contact the payer directly and provide a correct Social Security number or EIN. You may need to complete a Form W-9 (for U.S. citizens and residents) or a Form W-8BEN (for foreign nationals). Once the payer receives a valid TIN from you, they must stop withholding within 30 days.

If the issue is underreported income, you have two main options. The first is to file an amended return (Form 1040-X) for the year in question, reporting the income you missed and paying any tax owed. Once you do this, you can contact the IRS and request that backup withholding be lifted. The second option is to contact the IRS directly and work out a payment plan if you cannot pay the full amount owed immediately.

The IRS has a specific process for lifting backup withholding. You must request it in writing, usually by sending a letter to the IRS office that issued the backup withholding notice. Include your name, Social Security number, the tax year in question, and an explanation of how you have resolved the issue. Processing can take several weeks.

Tracking backup withholding on your tax return

Backup withholding does not appear in the normal withholding boxes on your 1099 forms. Instead, payers report it in Box 4 of Form 1099-B (for broker transactions), Box 4 of Form 1099-DIV (for dividends), Box 4 of Form 1099-INT (for interest), or similar boxes on other 1099 forms. Some payers may also send you a separate statement.

You must add up all backup withholding from all sources and report it on your tax return as a credit against your tax liability. On Form 1040, this goes on the line for "Other income tax payments." If you overpaid through backup withholding, the excess will be refunded to you. If you underpaid, you will owe the difference.

Keep copies of all 1099 forms and payer statements showing backup withholding. If the amounts do not match what you received, contact the payer to request a corrected form. The IRS will also have a record of the withholding, so discrepancies can trigger an audit.

The difference between backup withholding and normal tax withholding

Normal tax withholding, such as what an employer takes from your paycheck, is based on your W-4 form and is meant to estimate your actual tax liability for the year. Backup withholding is a flat 24% rate that has nothing to do with your actual tax bracket or filing status. It is a collection tool, not a tax calculation.

Normal withholding is reported on your W-2 in boxes 2 and 4. Backup withholding is reported separately on 1099 forms. If you have both normal withholding and backup withholding in the same year, you must track them separately and add them both up when you file your return.

Another key difference: normal withholding stops when you leave a job or close an account. Backup withholding continues on all payments from that payer until you take action to stop it. This is why it is important to resolve the underlying issue as soon as you learn about it.

What happens if you disagree with backup withholding

If you believe backup withholding was imposed in error — for example, because you did provide a correct TIN, or because you did report the income on your return — you can dispute it. Contact the payer first and ask them to verify their records. If they confirm they have a valid TIN from you, they should stop withholding immediately.

If the payer says they received a notice from the IRS to begin withholding, you will need to contact the IRS directly. Call the IRS at 1-800-829-1040 and explain the situation. You may be asked to provide documentation, such as a copy of your tax return showing the income in question, or proof that you provided a TIN to the payer. The IRS can issue a revised notice to the payer instructing them to stop withholding.

Do not ignore backup withholding notices or assume they will go away. The longer you wait, the more money is withheld, and the harder it becomes to resolve the issue.

Frequently Asked Questions

Can backup withholding affect my refund?

Yes. If backup withholding reduces your tax liability below zero, you will receive a refund. However, if backup withholding is too high and you owe other taxes, the IRS will apply the withheld amount to what you owe before refunding any excess. Always report all backup withholding on your return so the IRS can credit it correctly.

What if I move and the payer cannot reach me?

Backup withholding continues regardless of whether you receive notices. The payer is required to withhold based on the IRS notice they received. Update your address with the IRS and contact the payer directly to provide a correct TIN or resolve any underreporting issue. Do not rely on mail to stop the withholding.

Does backup withholding apply to retirement account distributions?

Backup withholding can apply to IRA and other retirement account distributions if you fail to provide a TIN or if the IRS has notified the plan administrator of underreporting. However, retirement accounts have their own withholding rules, so the interaction is complex. Contact your plan administrator if you receive a backup withholding notice on a retirement distribution.

How long does it take to stop backup withholding after I provide a TIN?

Once a payer receives a valid TIN from you, they must stop withholding within 30 days. However, if the issue is underreported income, stopping backup withholding requires IRS approval, which can take several weeks or longer depending on how quickly you resolve the underlying tax issue.