Topic 09 · 5 min read
How to Complete a Federal W-4
The one form that decides your whole paycheck.
The W-4 tells your employer how much federal tax to hold out of each paycheck. It is not a tax return and it is not permanent — you can hand in a new one any time your life or your pay changes.
What to know
- Step 1 is the only required part
- Name, address, Social Security number, and filing status. If you stop there, withholding is calculated at the standard amount for that status.
- Step 2 is for second incomes
- A second job, or a working spouse, means each employer alone withholds too little. Use the IRS estimator or the checkbox when the two jobs pay similarly.
- Step 3 claims dependents
- Enter the annual credit amount for qualifying children and other dependents; this lowers withholding across the year instead of waiting for the refund.
- Step 4 fine-tunes
- Add other income with no withholding, extra deductions you expect, or a flat extra dollar amount per paycheck.
- Exempt is rare
- You may only write 'exempt' if you owed nothing last year and expect to owe nothing this year, and it must be renewed each February.
The tax benefit
Accurate withholding keeps your own money in your paycheck all year instead of overpaying the government and waiting for it back.
Worked example
Two part-time jobs
A student earning $14,000 across two jobs finds each employer withholding almost nothing and owes at filing. Checking the Step 2 box on both W-4s balances the withholding and removes the surprise.
Watch out for
- Update the form after marriage, a new baby, or a second job — stale W-4s cause most April surprises.
- Claiming exempt when you actually owe tax can bring penalties.
- State withholding usually uses a separate form.
Terms from this topic
Form W-4WithholdingFiling statusExempt
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