What is Federal income tax withholding?

Federal income tax withholding is the amount your employer sends to the IRS toward your income tax.

Unlike FICA, federal income tax withholding isn't a flat rate. It depends on your pay, pay frequency, and the choices on your Form W-4.

It's an estimate of your yearly tax. You settle the difference when you file your return.

Where to find it on your paystub

Labeled Federal Income Tax, Fed Withholding, FIT, or FITW.

StubParse reads every line of a paystub, including this one, and checks the math adds up.