How Do You Update Your W-4 After a Divorce?

Quick answer

After a divorce, redo your W-4: in Step 1 change your filing status from married to Single (or Head of Household if you have a qualifying child), undo any Step 2 adjustment you'd made for your ex's income, and update Step 3 dependents based on who claims the children. Do it soon after the divorce is final so your paychecks match your new tax picture.

Why you need a new W-4 after divorce

Divorce changes three things the W-4 cares about: your filing status is no longer married, you can no longer count your former spouse's income, and the children may now be claimed by only one parent. Leaving your old W-4 in place usually means too little tax is withheld — and a surprise bill in April.

Step 1: Change your filing status

Switch from Married filing jointly to Single. If you pay more than half the cost of keeping up a home for a qualifying child, you may instead qualify for Head of Household — which gives a larger standard deduction and better brackets, so less tax is withheld. Pick the one you'll actually file.

Step 2: Remove your ex's job

If, while married, you checked the Step 2 box or used the multiple-jobs worksheet counting your spouse's income, undo it. As a newly single filer you only account for your own jobs. (If you personally work two jobs, Step 2 still applies — see our two-jobs guide.)

Step 3: Who claims the children?

Only the parent who will claim a child on their tax return puts that child in Step 3 ($2,200 per qualifying child under 17). Follow your divorce decree or Form 8332 — if you both claim the same child, the IRS will flag it. See our dependents guide for the full rules.

A note on alimony

For divorces finalized after 2018, alimony is not taxable to the person receiving it and not deductible for the person paying it — so it doesn't affect your W-4. For divorces finalized in 2018 or earlier, the old rules may still apply; check with a tax pro if that's you.

Frequently asked questions

You can if you're unmarried at year-end, pay more than half the cost of your home, and have a qualifying child living with you more than half the year. Head of Household beats Single — a bigger standard deduction and lower brackets — so choose it on your W-4 Step 1 if you qualify.

Yes, as soon as the divorce is final. Your filing status and dependents changed, and your old married W-4 almost certainly under-withholds now. Updating promptly spreads the correction across the rest of the year instead of leaving a bill in April.

Only the parent entitled to claim the child on their return — per your divorce decree or Form 8332 — lists the child in Step 3. Never both. If you're the custodial parent releasing the exemption, you leave the child off your Step 3.