Tax glossary

Backup Withholding

Backup Withholding — what it means, how it works, and a real example, explained without the jargon.

What is Backup Withholding?

Backup withholding is a flat rate a payer must hold back from certain payments when your taxpayer info is missing or flagged.

How it works

If you don't give a correct TIN on a W-9, or the IRS notifies a payer that you've under-reported, the payer withholds a set percentage (currently 24%) from payments like interest, dividends, and contractor pay, and sends it to the IRS as a prepayment of your tax.

A quick example

A contractor who submits a W-9 with a wrong Social Security number may see 24% withheld from their pay until the mismatch is fixed.

What people get wrong

Backup withholding is almost always avoidable — just make sure the name and TIN on your W-9 exactly match IRS records. A typo is the usual culprit.

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Frequently asked questions

What does Backup Withholding mean?

Backup withholding is a flat rate a payer must hold back from certain payments when your taxpayer info is missing or flagged.

How does Backup Withholding work?

If you don't give a correct TIN on a W-9, or the IRS notifies a payer that you've under-reported, the payer withholds a set percentage (currently 24%) from payments like interest, dividends, and contractor pay, and sends it to the IRS as a prepayment of your tax.

What's the most common mistake with backup withholding?

Backup withholding is almost always avoidable — just make sure the name and TIN on your W-9 exactly match IRS records. A typo is the usual culprit.