The W-4 your employer hands you today is not the form your parents filled out. Since 2020 there are no "allowances" — the form now works in plain dollars. It is shorter, but the instructions read like they were written by the tax code itself. Here is each step translated.
Step 1: Name and filing status — the only mandatory part
Personal details plus one of three boxes: Single or Married filing separately, Married filing jointly, or Head of household. This sets which standard deduction and bracket schedule your withholding assumes. Head of household is the one people miss — if you are unmarried, pay more than half the cost of keeping up a home, and a qualifying person lives with you, this box is worth real money.
Step 2: Multiple jobs — skip it if it does not apply
Only touch this if you hold two jobs at once or you file jointly and your spouse also works. The point: two incomes taxed as if each were the only income means too little withheld. If it applies, the most accurate route is the IRS estimator at irs.gov/W4App — it gives you a number to drop into Step 4(c).
Step 3: Dependents — dollars, not people
For 2026, multiply qualifying children under 17 by $2,200 and other dependents by $500, then write the total. Writing a number here directly reduces the tax withheld from each check — this is the form's replacement for the old allowance math.
Step 4: The three tuning dials
- 4(a) Other income — interest, dividends, side income with no withholding. Enter the annual total so tax on it comes out of your paycheck instead of surprising you in April.
- 4(b) Deductions — if you itemize and expect deductions above the standard deduction, enter the excess. Most people leave this blank.
- 4(c) Extra withholding — a flat dollar amount extra per paycheck. The scalpel: use it when the calculator shows you coming up short.
Step 5: Sign it — an unsigned form is not a form
Signature, date, hand to your employer — never the IRS. Then verify: run your numbers through our calculator, print the pre-filled W-4 worksheet from your report, and compare the new withholding against the estimate on your next paystub.