What is backup withholding?

Backup withholding is a penalty mechanism the IRS uses when there's a problem with your taxpayer information. When triggered, the person paying you must hold back 24% of your payments and send it directly to the IRS instead of to you. You eventually get this money back as part of your tax refund — but it takes months to a year, and it crushes your cash flow in the meantime.

For a freelancer earning $80,000 from a client, backup withholding means $19,200 going to the IRS over the year instead of into your bank account. That's the difference between paying your bills and being broke.

What triggers backup withholding

1. You don't provide a W-9

If a payer asks for your W-9 and you don't provide it, they're required by IRS rules to withhold 24% from every payment to you. This is the most common cause.

2. You provide an incorrect TIN

If your name and TIN don't match what's on file with the IRS (typo on your W-9, transposed digits, wrong SSN), the IRS will eventually notify the payer with a "B notice" requiring them to start backup withholding.

3. The IRS notifies you of underreporting

If you fail to report all your interest, dividends, or other income on past tax returns, the IRS can require backup withholding on those types of payments going forward. They'll send you a notice (CP2100 or CP2100A) telling you about it.

4. You fail to certify on your W-9

If you don't sign Part II of the W-9, or if you cross out item 2 (which says you're not subject to backup withholding) when you shouldn't have, the payer must withhold.

Income types subject to backup withholding

Interest payments (1099-INT)
Dividends (1099-DIV)
Independent contractor payments (1099-NEC)
Rents, royalties, prizes, awards (1099-MISC)
Broker payments and barter exchanges (1099-B)
Payment card and third-party network transactions (1099-K)
Gambling winnings in some cases

How to fix it if it's already happening

If backup withholding has already started on your payments:

Find out why. Ask the payer or check for IRS notices. Was your W-9 missing? Was your TIN wrong?
Submit a corrected W-9 with accurate name and TIN. Make sure name matches Social Security Administration records (for SSN) or IRS EIN records (for EIN).
For TIN mismatches: contact the SSA (if SSN is wrong) or IRS (if EIN issue). Your name on the SSN must match exactly.
For underreporting issues: respond to IRS notices and file any missing returns. The IRS may need to send you a "C notice" releasing you from backup withholding.

Once corrected, the payer can stop backup withholding on future payments. The amounts already withheld are credited toward your tax bill when you file your return.

How to recover withheld amounts

You don't lose the money — it just took a long detour. Backup withholding amounts are reported on the 1099 you receive in January (in Box 4). When you file your tax return, you report the full income amount AND the backup withholding amount as a tax payment, similar to W-2 withholding. If your actual tax liability is less than what was withheld, you get a refund.

How to avoid it entirely

Always provide a W-9 when asked, before you start working
Double-check your name matches Social Security records exactly (especially after marriage/divorce)
Triple-check your TIN — transposed digits are the #1 cause
Sign and date the W-9 in Part II
Don't cross out item 2 unless the IRS has actually told you you're subject to backup withholding
Report all 1099 income on your tax return — the IRS computer-matches everything

Backup Withholding Explained