What Should I Claim on My W-4 If Married? Jointly and Dependents

If you just got married, what to claim on your W-4 comes down to four decisions: pick “Married Filing Jointly” in Step 1, coordinate Step 2 with your spouse if you both work, have only one of you (the higher earner) claim any dependents in Step 3, and use Step 4 for outside income or an extra flat amount if you want a cushion. The IRS asks you to submit the updated form to your employer within 10 days of the wedding.¹

The W-4 is the form that tells your employer how much federal income tax to pull from each paycheck. Get it right and you break even in April. Get it wrong and you either owe money or hand the government an interest-free loan for a year.

Step 1: Pick Married Filing Jointly

Step 1 sets the baseline your employer uses to calculate every paycheck’s withholding. For 2026, the standard deduction for married filing jointly is $32,200, compared to $16,100 for single filers or those married filing separately.² The wider brackets that come with joint filing are the reason most married couples choose it.

Your status is determined by whether you’re married on the last day of the tax year. A December 31 wedding counts as married for the full year. A legal separation under a divorce or separate maintenance decree makes you unmarried for tax purposes.³

Married filing separately is worth considering in a few specific situations: when one spouse is on an income-driven student loan repayment plan, or when one spouse has large medical expenses that only clear the deduction threshold on a smaller income. Otherwise it usually produces a higher combined tax bill.

Head of household is rare for newly married couples. It requires you to be considered unmarried, to have paid more than half the cost of maintaining your home, and to have had a qualifying dependent living with you for more than half the year.⁴

A boundary worth flagging: registered domestic partnerships and civil unions are not marriages under federal law. If that describes your relationship, you cannot select either married status on the W-4.⁵

Step 2: Coordinate If You Both Work

This is where most dual-income couples go wrong. Without a Step 2 adjustment, each employer applies the full married-filing-jointly brackets and the full $32,200 standard deduction as if that paycheck were the household’s only income. Add the two together and you’ve under-withheld, sometimes badly. The IRS offers three ways to fix it.

The Online Withholding Estimator

The IRS Tax Withholding Estimator at irs.gov/W4App is the most accurate option, especially if your incomes are unequal, you have side income, or you’re starting a new job mid-year. You’ll need recent pay stubs for both spouses.⁶ If either of you has self-employment income, the IRS specifically recommends this method.⁷

The Multiple Jobs Worksheet

Page three of the W-4 instructions has a worksheet that uses the highest-paying and lowest-paying jobs to look up a value in a tax table. Divide that number by your annual pay periods and enter it as extra withholding in Step 4(c).⁷ It’s a paper alternative to the online tool.

The Step 2(c) Checkbox

If there are exactly two jobs in the household and they pay similar amounts, both spouses can check the box in Step 2(c). Each employer then cuts the standard deduction and tax brackets in half when calculating withholding. Both W-4s have to have the box checked for the math to work. If one job pays significantly more than the other, this method over-withholds, and the gap grows as the pay difference widens.⁷ You’ll see the excess again as a refund, but you’ve lent the money out for free until then.

Step 3: Only One Spouse Claims Dependents

Step 3 reduces your withholding to account for the Child Tax Credit and the credit for other dependents. For tax year 2026, the credit is $2,200 for each qualifying child under 17.⁸ Other dependents, such as children 17 and older or elderly relatives you support, are worth $500 each.

Multiply your qualifying children by $2,200, your other dependents by $500, and add the two. That combined figure goes on the form and reduces your withholding across every remaining paycheck instead of showing up as a refund next spring.

The critical rule for married couples: only one of you claims the dependents. If both spouses enter the same three kids in Step 3, the household under-withholds by $6,600 and you owe that amount at tax time. Put the dependents on the higher earner’s W-4, because a larger per-paycheck reduction is easier to absorb against a bigger paycheck.

The credit phases out at a rate of $50 for every $1,000 of income above $400,000 for married couples filing jointly.⁸ If your combined income is close to that threshold, use the Withholding Estimator rather than the flat Step 3 math.

Step 4: Outside Income, Deductions, and a Cushion

Step 4 has three optional lines that fine-tune what Steps 1 through 3 don’t cover. None are required, but skipping them when they apply is a common source of April surprises.

Line 4(a): Other Income

Enter the annual total of income that doesn’t come from a job and isn’t otherwise withheld against: interest, dividends, rental income, retirement distributions. Your employer will withhold a little extra from each paycheck to cover the tax on it. Do not include wages from any job or self-employment income here; the W-4 instructions specifically exclude both.⁷ For self-employment income, use the Withholding Estimator, since it also has to account for self-employment tax.

Line 4(b): Deductions

If you plan to itemize instead of taking the standard deduction, this line accounts for the difference. Use the Deductions Worksheet on page three of the W-4 instructions to calculate the excess over $32,200 in combined mortgage interest, state and local taxes (up to the $10,000 cap), and charitable contributions. If your itemized total is close to the standard deduction, leave this line blank. The small withholding reduction isn’t worth risking a shortfall.

Line 4(c): Extra Withholding

A flat dollar amount pulled from every paycheck on top of the normal calculation. If you owed $1,200 last year and are paid biweekly, entering $47 here ($1,200 ÷ 26) roughly covers the gap. This is the line to use when your income is unpredictable, when you’ve owed at tax time before, or when you simply want a refund cushion.

Submit Within 10 Days and Verify Your Next Paycheck

The IRS asks newly married employees to submit an updated W-4 within 10 days of the marriage.¹ Most employers use a digital payroll portal; if yours takes paper, hand the signed form to payroll or HR. Look at your next two pay stubs to confirm the federal withholding line has actually changed.

You can update the W-4 any time during the year, not just after a life event. If your first pass over-withholds or under-withholds, run the estimator again mid-year with current pay stubs and submit a new form. The tool accounts for taxes already withheld and recalculates what’s needed for the remaining pay periods.⁹

Avoiding an Underpayment Penalty

If your combined withholding falls too far short of what you owe, the IRS adds an underpayment penalty. It’s essentially interest on what you should have paid, calculated at the federal short-term rate plus three percentage points, compounded daily. As of early 2026, that rate is 7%.¹⁰

You avoid the penalty entirely if you meet any one of these:

You owe less than $1,000 after subtracting withholding and refundable credits from your total tax.
You paid at least 90% of the tax you owe for the current year through withholding and estimated payments.
You paid at least 100% of the tax shown on last year’s return (110% if your adjusted gross income last year exceeded $150,000).¹¹

The last one is the easiest planning target. Pull line 24 from last year’s Form 1040, make sure your combined current-year withholding meets or exceeds it, and the penalty is off the table regardless of raises or bonuses.

A Few Situations That Change the Answer

Name Change After the Wedding

If either spouse changed their last name, the name on your tax return has to match Social Security Administration records. A mismatch between your W-2 and SSA can delay your refund.¹² Update the SSA first at ssa.gov or 800-772-1213, then notify your employer so payroll records match.

Non-Resident Alien Spouse

By default, you cannot file jointly if your spouse is a non-resident alien. You’d file as married filing separately or, if you qualify, head of household.¹³ You can elect to treat your spouse as a U.S. resident for tax purposes, which opens up joint filing, but then both of you must report worldwide income every year the election stays in effect, and your spouse needs an SSN or ITIN. Use the Withholding Estimator to work out the W-4 in this situation.

Exempt from Withholding

If you owed zero federal income tax last year and expect to owe zero this year, you can write “Exempt” below Step 4(c) and skip Steps 2 through 4.⁷ The election expires every February 15, so you’d resubmit each year.

State Withholding

The federal W-4 covers federal tax only. Most states with an income tax have their own withholding form; nine states have no income tax at all. Ask your employer or your state tax agency what’s required.

1
Internal Revenue Service. Newlyweds Tax Checklist
2
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill
3
Office of the Law Revision Counsel. 26 US Code 7703 – Determination of Marital Status
4
Internal Revenue Service. Publication 501 (2025), Dependents, Standard Deduction, and Filing Information
5
Internal Revenue Service. Answers to Frequently Asked Questions for Registered Domestic Partners and Individuals in Civil Unions
6
Internal Revenue Service. IRS Tax Withholding Estimator Helps Taxpayers Get Their Federal Withholding Right
7
Internal Revenue Service. Form W-4 (2026) Employee’s Withholding Certificate Instructions
8
Office of the Law Revision Counsel. 26 US Code 24 – Child Tax Credit
9
Internal Revenue Service. Essential Tax Tips for Marriage Status Changes
10
Internal Revenue Service. Quarterly Interest Rates
11
Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty
12
Internal Revenue Service. Name Changes and Social Security Number Matching Issues
13
Internal Revenue Service. Nonresident Spouse