Backup withholding is a tax the IRS collects directly from your income when you do not provide a correct taxpayer identification number or when you have underreported income in the past
The IRS uses backup withholding as a collection tool, not a penalty. When a business pays you money — whether as a contractor, freelancer, investment income, or other non-employment payment — they are supposed to report that payment to the IRS on a Form 1099. To do that, they need your Social Security Number or Employer Identification Number. If you do not give them a number, give them a wrong one, or the IRS flags your account for underreporting income, the business must withhold 24% of what they pay you and send it to the IRS instead of giving it all to you.
Backup withholding is separate from the income tax withholding that comes out of a regular paycheck. It is a federal backup collection mechanism, and it stays in place until you resolve the underlying problem — usually by providing the correct identification number or by correcting your tax history with the IRS.
Key Takeaways
- Backup withholding removes 24% from payments you receive if you have not provided a valid taxpayer identification number to the payer.
- The IRS initiates backup withholding when you have underreported income on past tax returns or when a business reports a mismatched or missing identification number.
- You can stop backup withholding by providing the correct identification number to the payer or by resolving the underreporting issue with the IRS.
- The 24% withheld is credited against your tax liability when you file your return, so it is not an additional tax — it is prepayment.
The three situations that trigger backup withholding
Missing or incorrect identification number: This is the most common trigger. When you receive a 1099 form from a payer — a freelance payment, investment income, or other reportable payment — you must provide your Social Security Number or EIN. If you leave it blank, provide the wrong number, or the payer cannot match your number to IRS records, the payer receives a notice to begin backup withholding. The payer then withholds 24% from each payment until you provide the correct number.
Underreporting of income: If you reported income on a past tax return but the amount did not match what businesses reported to the IRS on 1099 forms, the IRS may place you under backup withholding. This usually happens after the IRS sends you a notice of underreporting and you do not respond or do not correct the issue within a set time.
Failure to pay backup withholding tax: If you were already under backup withholding and did not pay the tax owed when it came due, the IRS can continue or reinstate backup withholding on future payments.
How backup withholding affects your income and tax return
When backup withholding is in effect, you receive less money than the payer owes you. If a freelance client owes you $1,000, they withhold $240 and send it to the IRS, and you receive $760. The payer reports the full $1,000 on your 1099 form, so the IRS knows about the entire amount.
When you file your tax return, the $240 withheld is treated as a tax payment you already made — similar to withholding from a paycheck. If your total tax liability for the year is less than the amount withheld, you may receive a refund. If your liability is more, you owe the difference. The key point: the 24% is not an extra tax. It is prepayment toward what you owe.
Backup withholding can create cash flow problems because you receive less money upfront, even though you still owe tax on the full amount reported. This is why resolving the underlying issue quickly matters.
How to stop backup withholding
The path to stopping backup withholding depends on why it started. If the issue is a missing or incorrect identification number, provide the correct number to the payer in writing. Use Form W-9 (Request for Taxpayer Identification Number and Certification) if the payer asks for it, or provide the number directly if they have another process. Once the payer has the correct number and reports it to the IRS, backup withholding typically stops within one to two pay cycles.
If backup withholding started because of underreported income, you must contact the IRS directly. The IRS will have sent you a notice (usually CP2000 or a similar letter) explaining the discrepancy. You can respond to that notice by either agreeing with the IRS's correction or providing documentation that your original return was correct. Once the IRS resolves the discrepancy, they will notify the payer to stop backup withholding.
If you cannot locate the notice or do not know why backup withholding is in effect, call the IRS at 800-829-1040 (individual taxpayer line) or 800-829-4933 (business line) and provide your Social Security Number or EIN. The IRS can tell you the reason and what steps to take next.
Backup withholding versus other types of withholding
Backup withholding is often confused with regular income tax withholding from a paycheck, but they work differently. Regular withholding comes from W-2 wages and is based on the Form W-4 you file with your employer. The rate varies depending on your filing status and claimed dependents. Backup withholding is flat at 24% and applies only to non-employment income when a specific problem exists.
Backup withholding also differs from estimated tax payments. If you are self-employed or have income not subject to withholding, you may need to make quarterly estimated tax payments. Backup withholding is not a substitute for estimated payments — it is a collection tool the IRS uses when you have not complied with identification or reporting requirements.
What happens if you disagree with backup withholding
If you believe backup withholding was started in error — for example, you provided the correct identification number but the payer still withholds — you can dispute it. First, confirm with the payer that they have your correct number on file. Ask them to verify what they submitted to the IRS. If they confirm they have the right number, ask them to contact the IRS to request that backup withholding be removed.
If the issue is underreported income and you disagree with the IRS's assessment, respond to the notice you received. The notice will include instructions for filing a response, usually within 30 days. You can agree, disagree, or provide additional documentation. If you do not respond, the IRS's information becomes final and backup withholding continues.
Frequently Asked Questions
Does backup withholding explore to all 1099 income?
No. Backup withholding applies to specific types of 1099 income: 1099-NEC (nonemployee compensation), 1099-MISC (miscellaneous income), 1099-INT (interest), 1099-DIV (dividends), and a few others. It does not explore to 1099-R (retirement distributions) or 1099-S (real estate sales). The payer will know whether backup withholding applies to the type of payment they are making.
Can I get a refund of the backup withholding amount?
Yes, if the total amount withheld exceeds your tax liability for the year. When you file your tax return, the IRS credits the backup withholding against what you owe. If you overpaid, you receive a refund. The refund is processed with your regular tax return, which typically takes 21 days or longer depending on how you file.
What if I provide the correct identification number but backup withholding continues?
It can take one to two pay cycles for the payer to update their records and notify the IRS. If backup withholding continues after that, contact the payer again to confirm they submitted the correct number. If they did and withholding still continues, contact the IRS at 800-829-1040 to report the issue and request that backup withholding be removed from your account.
Does backup withholding affect my credit score or borrowing?
Backup withholding itself does not appear on your credit report. However, if backup withholding results in unpaid taxes, the IRS can file a tax lien, which does affect your credit. The best approach is to resolve the underlying issue — provide the correct identification number or respond to any IRS notice — as soon as you become aware of it.