Backup withholding is a 24% tax that payers must withhold from certain payments when you haven’t provided a valid taxpayer ID — or when the IRS has flagged your account. If it starts, you’ll receive less than your full payment. Here’s exactly what triggers it and how to stop it.
The Basics: Why Backup Withholding Exists
The IRS uses backup withholding to collect taxes from people who fail to report income from 1099-type payments. If a payer doesn’t have your correct Social Security Number or EIN, they can’t file an accurate 1099. Without a 1099, the IRS has no way to verify you reported that income.
Backup withholding ensures the IRS collects some tax upfront — similar to payroll withholding on wages — even when normal 1099 reporting is broken.
2026 Backup Withholding Rate
The backup withholding rate is 24% — a flat rate that applies regardless of your tax bracket. If you’re in the 12% bracket and your freelance payment is $1,000, backup withholding takes $240 — double what you might actually owe in marginal tax. The excess is returned when you file your return.
What Payments Are Subject to Backup Withholding
| Payment Type | Typical Form |
|---|---|
| Interest | 1099-INT |
| Dividends | 1099-DIV |
| Freelance/contractor payments | 1099-NEC |
| Broker proceeds (stock sales) | 1099-B |
| Rents | 1099-MISC |
| Royalties | 1099-MISC |
| Gambling winnings (with W-2G) | W-2G |
Regular employee wages (W-2 income) are not subject to backup withholding. Neither are most real estate transactions.
Four Things That Trigger Backup Withholding
1. Missing TIN
You didn’t provide a Social Security Number or EIN to the payer. Most payers request a W-9 to collect this; if you don’t return it before payment, they must withhold.
2. Incorrect TIN
You provided a number that doesn’t match IRS records. The IRS sends payers a “B-Notice” (IRS Letter 972CG) when a TIN doesn’t match the name in their database. The payer must begin withholding within 30 days.
3. IRS Notification of Underreported Income
The IRS notified the payer that you underreported interest or dividend income in a prior year. This triggers withholding on future payments from that payer until the IRS lifts it.
4. Failure to Certify Exemption
Some payments require the payee to certify they are not subject to backup withholding (on Form W-9). If you fail to certify, withholding begins.
What Payers Must Do
When any of the above applies, payers must:
- Withhold 24% from each payment
- Deposit the withheld amount with the IRS
- Report withholding in Box 4 on your 1099 or W-2G at year end
Payers who fail to withhold when required can be held liable for the unwithheld amount.
How to Stop Backup Withholding
The fix depends on the cause:
| Trigger | How to Stop It |
|---|---|
| Missing TIN | Provide a completed W-9 to the payer |
| Incorrect TIN (mismatch) | Correct the TIN on a new W-9; payer stops after IRS confirms match |
| Underreported income (IRS-ordered) | File missing returns, pay owed tax, request IRS to issue release notice |
| Certification failure | Submit a W-9 certifying correct TIN and non-subject-to-backup-withholding status |
For IRS-ordered backup withholding, contact the IRS at 1-800-829-1040 to find out what you need to resolve and request the “stop backup withholding” notice once your account is current.
How to Recover Backup-Withheld Amounts
Backup withholding goes to your IRS tax account. When you file your tax return:
- The backup withheld amount appears in Box 4 of your 1099 (or Box 4 of your W-2G)
- Enter this on Form 1040, Line 25b as federal income tax withheld
- It reduces your total tax owed or increases your refund — exactly like paycheck withholding
Example: Mike had $3,200 in backup withholding on broker proceeds. His actual tax owed for the year is $1,900. He receives a refund of $1,300 ($3,200 withheld − $1,900 owed).
Backup Withholding vs. Regular Withholding
| Feature | Regular Payroll Withholding | Backup Withholding |
|---|---|---|
| Who it applies to | Employees | Contractors, investors, others |
| Form used | W-4 | W-9 |
| Rate | Calculated per tax tables | Flat 24% |
| What controls it | Your W-4 elections | IRS TIN matching, IRS notices |
| How to stop | Adjust W-4 | Correct TIN / resolve IRS issue |
Backup withholding is most often triggered by a missing or incorrect taxpayer identification number — see tax ID numbers (TIN, EIN, SSN) for the types of IDs and how to obtain one. The standard mechanism for providing your TIN to a payer is Form W-9, which certifies your number and avoids the 24% withholding. The 24% backup rate is entirely separate from regular paycheck withholding — see withholding tax for how standard federal income tax withholding works.
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