Someone paid you and kept 24% of it. Or you are the business that now has to hold money back from a vendor. Either way this is fixable, usually faster than people expect.
Backup withholding is a type of federal tax that the business paying you must withhold from certain payments and remit to the IRS on your behalf. It is not a penalty and the money is not gone. Backup withholding means prepaid tax, and it comes back as a credit when the return for that year is filed.
The tax rate has been 24% since 2018 and did not move for 2026. What did move is the dollar line that triggers it, and that change caught plenty of accounts payable teams mid-year.
Most business payments arrive gross. Nobody withholds anything. The system assumes the recipient reports the income and the business paying reports it too, on a matching information return.
That assumption breaks when there is no good taxpayer identification number on file. The Internal Revenue Service cannot match a form to a person without one, so section 3406 requires withholding at the source instead.
A payer then takes 24% off future covered payments, sends it in, and shows the tax withheld in the withholding box of the 1099 issued at year end. Backup withholding is a federal tax collected early, not an extra charge, and these rules require withholding at the source rather than trusting the paperwork.
The list is broader than most people assume. Payments subject to backup withholding include interest and dividends, rents, royalties, commissions, nonemployee compensation, broker and barter exchange proceeds, patronage dividends, and payments by fishing boat operators, all of which land on an information return. Certain gambling winnings require backup withholding too. So do ordinary payments for work you do as a contractor, and earnings you collect when you make an investment that throws off interest or dividend income.
Several categories are excluded from backup withholding. Real estate transactions, cancelled debt, retirement and ABLE account distributions, long-term care benefits and unemployment compensation are not otherwise subject to withholding under these rules. The IRS backup withholding page keeps the current list.
One rule sits underneath all of it. If an amount is not reportable on Form 1099 to begin with, no withholding attaches. That is why the 2026 threshold change matters so much.
For seventy years the number was $600. Pay a contractor that much across a calendar year and you owed a form, and with no W-9 on file you owed withholding on top.
Section 70433 of the One Big Beautiful Bill Act raised the reporting floor for Forms 1099-NEC and 1099-MISC to $2,000 for payments made after December 31, 2025. Because payments reportable on Form 1099 are what the withholding rules hang on, the trigger climbed alongside it, so fewer vendors may be subject to backup withholding at all this year. From 2027 the figure indexes for inflation in $100 steps rather than sitting frozen.
Some numbers held still. Royalties still generate a form at $10 and attorney gross proceeds at $600. Form 1099-K reverted to more than $20,000 and more than 200 transactions, with Treasury issuing proposed regulations in 2026 to align section 3406 with it. Our breakdown of the 1099-K reporting threshold covers that thread.
Watch the states. Many kept their own floors at $600 or lower, so federal relief may not shrink the filing load at all.
There are only two doors in.
A missing or wrong TIN. Either the payee did fail to provide a number, or the name and number combination does not match IRS records. This is the common one, and it is why the Form W-9, formally the Request for Taxpayer Identification Number and Certification, exists. Signing it supplies a social security number, an employer identification number or an individual taxpayer identification number, and lets you certify that you're not subject to backup withholding.
A notice from the IRS. Where someone underreported interest and dividends on a prior federal income tax return, the IRS will notify the taxpayer first, then the business paying them. Backup withholding can apply for years after the original filing. Being subject to backup withholding due to previous underreporting behaves differently from the TIN version, and paperwork alone will not end it.
The mechanics live in Publication 1281, Backup Withholding for Missing and Incorrect Name/TIN(s), and the clock runs faster than most teams expect.
After information returns are filed, the IRS notifies the payer of mismatches through a CP2100 or CP2100A notice listing missing and incorrect combinations, so you learn about the problem months after the money moved. Smaller filers receive the CP2100A version.
Where a TIN is missing, begin backup withholding immediately. There is no grace period.
Where a combination is wrong, you get 15 business days from the CP2100 notice to send a First B Notice with a blank W-9 attached. If nothing comes back within 30 business days, withholding starts. Should the same account appear again within three calendar years, a Second B Notice goes out, this time without a W-9. The payee must validate the name and number with the Social Security Administration or IRS and return proof, so the account is subject to mandatory backup withholding until they do.
Amounts held are deposited and reported annually on Form 945, which is separate from payroll deposits. Missing that IRS form creates a second problem on top of the first.
The smarter move is upstream. The free TIN Matching service checks a name and number against IRS records before a single dollar moves, which will usually prevent backup withholding from ever arising. Collecting a W-9 before the first check clears handles the rest, and it is how you avoid backup withholding in the first place.
If a bad number caused it, the fix is short. Sending the correct TIN to the payer on a signed W-9 stops the deduction going forward, and providing the correct TIN early avoids the whole detour. It does not reach backward, so anything already withheld under the backup withholding rules stays with the government until you file.
If underreporting caused it, you need to correct the reason you became subject to backup withholding rather than the paperwork. File or amend the return for the year in question, pay what is owed, and ask the IRS for a determination that withholding can end. Once satisfied, the agency will notify the business paying you to stop.
Either way the money returns through your income tax return for the year. It is a credit against what you owe and can produce a tax refund if you overpaid overall.
A business that should have withheld and did not is responsible for backup withholding out of its own pocket, plus interest. The IRS imposes that liability on the payer, not the recipient.
Then come information return penalties. For returns due in 2026 they run $60 each if corrected within 30 days, $130 if corrected by August 1, and $340 if not, with intentional disregard at $680 and no annual cap. Across a vendor list that stops being a rounding error quickly.
Our guide to 1099-NEC and 1099-MISC filing requirements covers the surrounding deadlines.
For CPA firms facing a January that never gets shorter, Madras Accountancy handles 1099 preparation and W-9 chasing so exceptions reach a reviewer instead of a queue.
1. What is backup withholding tax? A flat 24% that a payer must take out of certain types of income and send in when a payee has no valid TIN, or when the IRS informs the payer that the recipient is subject to it.
2. Why is my client withholding 24% of my payments? Almost always a name and number mismatch, or a W-9 you never returned. Occasionally it follows a letter about underreported interest or dividend income.
3. How do I stop backup withholding? Give the correct TIN to the payer on a signed W-9. If underreporting was the cause, resolve that tax year with the IRS and wait for it to release the account.
4. Do I get the money back? Yes. It appears in the withholding box of your 1099 and is credited when you file, which may produce a refund.
5. What is the threshold in 2026? $2,000 for most 1099-NEC and 1099-MISC payments, up from $600, indexed from 2027. Royalties, attorney proceeds and card transactions follow their own numbers.
6. Who is exempt from backup withholding? Corporations for most payment types, tax-exempt organizations, government units and certain financial institutions. Payees claim it in the exemptions box of the W-9.
7. What happens if I receive a notice and ignore it? Nothing pauses. Backup withholding may still be required on future payments, and the IRS requires the payer to cover any tax it failed to collect, plus per-return penalties.
8. Does this apply to foreign payees? No. Nonresident aliens and foreign entities document status on a Form W-8 and fall under a separate chapter 3 regime instead.
This article is general information, not tax advice. The deadlines here are short, so confirm your facts with an advisor before acting.
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