Tax Withholding

Withholding is pay-as-you-go tax. Your employer estimates your annual tax from the filing status, dependents, and adjustments on your Form W-4, then withholds a slice of every paycheck (reported in W-2 box 2 at year end). Whether you get a refund in April depends only on how that running estimate compared with your real tax: withhold too much and the IRS returns the difference, withhold too little and you owe.

That makes the W-4 the lever behind every refund story. A raise, a second job, a marriage, or a new child all change your tax without changing your withholding until you update the form. The IRS Tax Withholding Estimator walks through a precise adjustment, and our tax refund calculator shows where your current withholding is likely to land you at filing.