How to Fill Out a W-4 When You Have Two Jobs

To fill out a W-4 when you have two jobs, complete Steps 3 and 4 on only one form — the W-4 for your higher-paying job — and use Step 2 on that same form to account for the wages from your second job. Leave Steps 3 through 4(b) blank on the W-4 for the lower-paying job. That single rule prevents the most common error people make with two paychecks, which is claiming the same dependents, deductions, and standard deduction twice.

Why Two Jobs Throw Off Your Withholding

Federal income tax uses a progressive rate structure: the first slice of your income is taxed at 10 percent, the next at 12 percent, and so on up through higher brackets.¹ With one job, your employer applies those brackets to your one salary and withholds roughly the right amount. Add a second job and neither employer knows about the other paycheck. Each one withholds as if its wages are your only income, giving you the benefit of the low brackets twice. Your combined income actually pushes you into a higher bracket, and neither payroll system is withholding for that. Step 2 of the W-4 exists to close that gap.²

What to Have In Front of You

Before you touch the form, gather a few numbers:

Recent pay stubs from your current job, so you know your annual gross wages or can annualize year-to-date earnings.
The expected wages from the new job. If you are starting mid-year, estimate only what you will actually earn between your start date and December 31, not a full year.
Your filing status: single, married filing jointly, married filing separately, or head of household.
Which job pays more. Almost every adjustment goes on the higher-paying job’s W-4, so you need to know which is which.

If you are starting the second job partway through the year, the IRS recommends the online Tax Withholding Estimator over the paper worksheet, since it can account for partial-year wages and withholding already collected.²

The Three Ways to Handle Two Jobs in Step 2

Step 2 of the W-4 gives you three options. Pick one; you do not need all three. Each reaches the same goal — right-sizing your withholding — but they differ in accuracy, effort, and how much your employer sees.²

The IRS Tax Withholding Estimator

The IRS provides a free tool at irs.gov/W4App that walks you through wages from every job, expected credits, and other adjustments, then generates a pre-filled W-4 you can print or download.³ It is the most accurate option, especially if you start mid-year or have income like dividends or retirement distributions. The tool does not ask for personally identifiable information.⁴ If you or your spouse have any self-employment income, the IRS specifically directs you to use the estimator rather than the other two methods.

The Multiple Jobs Worksheet

Page 3 of the W-4 has a worksheet you can complete by hand. Three steps:

Find the intersection amount. On the table on page 4, find your higher-paying job’s annual wages on one axis and your lower-paying job’s annual wages on the other. The dollar figure where they meet is the extra annual tax you need withheld.
Divide by remaining pay periods at the higher-paying job. If you are paid every two weeks starting in January, that is 26.
Enter the result on Step 4(c) — “Extra withholding” — of the W-4 for your higher-paying job only.²

Example: if the table shows an extra $3,000 for the year and you have 20 pay periods left, enter $150 in Step 4(c). Hold three jobs? The worksheet has extra lines to combine the second and third before you divide.

The Step 2(c) Checkbox

If you have exactly two jobs and they pay roughly similar amounts, check the box in Step 2(c) on both W-4s. That tells each employer to cut the standard deduction and tax brackets in half when calculating withholding, effectively splitting the tax burden between the two paychecks.² This works best when the lower job pays more than half of what the higher job pays. The wider the gap in pay, the more this method will over-withhold — bigger refund, smaller paychecks along the way.

What Goes on the Lower-Paying Job’s W-4

This is where people slip up. Do not fill out both W-4s the same way. The IRS instruction is explicit: complete Steps 3 through 4(b) on only one W-4, the higher-paying job’s, and leave those steps blank on the other.² Claiming your dependents or deductions on both would double-count them and leave you under-withheld.

On the lower-paying job’s W-4, fill out Step 1 (name, address, Social Security number, filing status) and Step 5 (signature and date). If you used the worksheet, leave Step 4(c) blank there — the extra withholding lives on the higher-paying job’s form. If you used the Step 2(c) checkbox, check it on both forms, but still leave Steps 3 through 4(b) blank on the lower-paying job’s form.

Dependents, Credits, and Non-Wage Income

Step 3 reduces your withholding for tax credits you expect to claim. For 2026, the child tax credit is worth up to $2,200 per qualifying child.⁵ The form has you multiply qualifying children by the credit amount, add credits for other dependents on a separate line, and enter the total. All of that goes on the higher-paying job’s W-4 only.

Step 4(a) is for income that will not have taxes withheld automatically — interest, dividends, rental income, retirement distributions.² Entering an amount here tells your employer to take a little extra from each paycheck to cover the tax on it, which usually removes the need for separate estimated payments. Do not put wages from any job in Step 4(a); it is only for non-wage income.

Step 4(b) is for deductions above the standard deduction, such as sizable itemized deductions. Leave it blank if you take the standard deduction.

Keeping the Second Job Off Your Employer’s Radar

You may not want your employer knowing you have a second job or outside income. The form has quiet workarounds. Step 4(a) asks for a dollar amount of other income, which your employer would see. You can skip Step 4(a) and instead put a lump-sum extra withholding figure in Step 4(c).² Your employer just sees that you want more tax taken out, not why. If you would rather not check the Step 2(c) box (which signals a second job), use the worksheet and put the result in Step 4(c) instead. The Tax Withholding Estimator can also route adjustments through Step 3 rather than Step 4(a), further limiting what payroll sees.⁴

Submitting the Form and Confirming It Took Effect

Give the completed W-4 to your employer’s payroll or HR department. Many companies accept an upload through a payroll portal or direct entry into an electronic system; smaller employers may want paper. Federal law requires your employer to begin using the new information no later than the start of the first payroll period ending on or after the 30th day from the date it received your form.⁶

Check your next few pay stubs. Confirm the extra withholding from Step 4(c) is actually being deducted. If it does not show up within that 30-day window, follow up with payroll. Keep a copy of every W-4 you turn in; it makes reconciling anything at tax time far easier.

If Your Second Job Is Freelance or Contract Work

Everything above assumes both jobs are W-2 employment with real payroll withholding. If your second job pays you on a 1099 instead, you do not fill out a W-4 for it — there is no employer withholding on your behalf. You are responsible for income tax and self-employment tax (Social Security and Medicare) directly, generally through quarterly estimated payments on Form 1040-ES.⁷

Two ways to handle it. You can make quarterly estimated payments yourself based on your projected self-employment income.⁸ Or, if you also hold a W-2 job, ask that employer to withhold extra by raising the amount in Step 4(c). The IRS notes this can eliminate the need for separate estimated payments. Because the math is trickier when self-employment is involved, the Tax Withholding Estimator is the IRS’s recommended tool for that situation.²

State Income Tax Is a Separate Form

The W-4 handles federal income tax only. Most states with an income tax use their own withholding form, though a few accept the federal W-4. If your two jobs are in different states, you may need to account for withholding in both, or only your home state if the two have a reciprocity agreement. Ask each employer’s payroll department what state form they need, especially if you live in one state and work in another.

When to File a New W-4 Later

A W-4 stays in effect until you replace it, so there is no annual refile. Redo it when your situation changes:

You start or leave a second job. Your combined income changes, so the extra withholding needs to change with it.
Your filing status changes. Marriage, divorce, or becoming head of household shifts your brackets and standard deduction.
You gain or lose a dependent. That changes what you can enter in Step 3.
Your income changes meaningfully. A raise, a new bonus structure, or a cut in hours can throw off the earlier math.

If a change means your current withholding will fall short for the rest of the year, the IRS expects an updated W-4 within 10 days. If your filing status shifts in a way that raises your tax, you generally have until December 1 of that year or 10 days after the change, whichever is later.

1
Internal Revenue Service. Federal Income Tax Rates and Brackets
2
Internal Revenue Service. Form W-4 (2026)
3
Internal Revenue Service. Tax Withholding Estimator
4
Internal Revenue Service. Tax Withholding Estimator FAQs
5
Internal Revenue Service. Child Tax Credit
6
Internal Revenue Service. Publication 15 (2026), Employers Tax Guide
7
Internal Revenue Service. Self-Employed Individuals Tax Center
8
Internal Revenue Service. Estimated Taxes