How to Fill Out Step 2b on W-4: Lines 1–4 for Multiple Jobs

Step 2(b) on Form W-4 is the Multiple Jobs Worksheet, and to fill it out you pull the annual wages for every job in your household, look up a dollar figure in the table on page 5 that matches your filing status, divide that figure by the number of pay periods at your highest-paying job, and enter the result as extra withholding on Step 4(c) of page 1. The worksheet itself stays with your records. Only the final per-paycheck dollar amount reaches your employer.¹

What the Worksheet Is Actually Fixing

Each employer withholds federal income tax as though its paycheck is your only income, applying the full standard deduction and the lowest brackets on its own. When you combine all your wages on your return, you get one standard deduction, and more of your income lands in higher brackets. The gap between what was withheld across all jobs and what you actually owe is often large enough to trigger a penalty.²

The worksheet closes that gap by producing one number: an additional dollar amount that one employer will withhold from each paycheck.

Is Step 2(b) Even the Right Choice for You

Step 2 gives you three options, and you use only one. The paper worksheet at 2(b) works well when your highest-paying job pays more than roughly double the next one. If the two jobs pay similar amounts and there are only two of them, the 2(c) checkbox on both W-4s is simpler. If you want the most accurate result, or you started a job mid-year, or you have four or more jobs in the household, use the IRS Tax Withholding Estimator at irs.gov/W4App, which is option 2(a).³¹

The 2(c) checkbox is limited to exactly two jobs. Households with three or more need either the worksheet or the online estimator.

What You Need Before You Start

Pull the most recent pay stub for every job in your household and work out the annual wage for each one, or a reasonable estimate. Have Form W-4 open to page 3 (the worksheet) and page 5 (the lookup tables). Two tables sit on page 5: one for Married Filing Jointly and one for Single or Head of Household. Use the one that matches your filing status.¹

Line 1: If Your Household Has Two Jobs

Find the row in the page 5 table for the higher-paying job’s annual wages and the column for the lower-paying job’s annual wages. The number where they meet is the additional annual tax needed to close your withholding gap. Enter that number on Line 1 and skip to Line 3.¹

Lines 2a Through 2c: If You Have Three Jobs

Three jobs take two lookups.

For Line 2a, use the highest-paying job’s wages as the row and the second-highest job’s wages as the column. Enter the intersection value.

For Line 2b, add the two highest-paying jobs’ annual wages together. Use that combined total as the row and the third job’s wages as the column. Enter the new intersection value.

For Line 2c, add Lines 2a and 2b. That combined figure takes the place of Line 1 for the rest of the worksheet.¹

The worksheet stops at three jobs. Four or more, and the online estimator gives a more reliable number.

Line 3: Pay Periods

Enter the number of pay periods per year for the highest-paying job. Weekly is 52, biweekly 26, semimonthly 24, monthly 12. This is tied to the highest-paying job specifically, not whichever job’s W-4 you happen to be filling out.¹

Line 4: The Per-Paycheck Amount

Divide Line 1 (or Line 2c for three jobs) by Line 3. The result is the extra dollar amount to withhold from each paycheck. If the table gave you $2,600 on Line 1 and the highest-paying job pays biweekly, $2,600 divided by 26 comes out to $100 per paycheck.

Moving the Number to Page 1

The Line 4 amount goes on page 1 at Step 4(c), the line labeled “Extra withholding.” That is the only figure from the worksheet that reaches your employer. The worksheet is marked “Keep for your records” and is not submitted.¹

Put the extra withholding on the W-4 for the highest-paying job only. If you and your spouse both work, each of you completes a separate W-4, but the worksheet adjustment should appear on just one of them. The IRS recommends putting it on the form for whichever job pays the most, because that produces the most accurate withholding.²

Then complete Step 1 (name, address, Social Security number, filing status) and sign at Step 5. Those are the only other required steps. Submit page 1 to payroll, either on paper or through your employer’s online portal. If the portal has a field for “additional withholding” or “extra tax per pay period,” that’s where the Line 4 result belongs.

Check Your Next Paycheck

Federal law requires your employer to put a new W-4 into effect no later than the start of the first payroll period ending on or after 30 days from the date you submit it. Employers can apply it sooner, and most payroll departments process the change within one or two pay cycles.⁴

Look on your next pay stub for an “additional withholding” or “extra tax” line item matching the amount you put in Step 4(c). If it doesn’t show up after two pay cycles, call payroll. You can also run the Tax Withholding Estimator after that first adjusted paycheck, feeding in year-to-date withholding from the stub, to confirm you’re on track.³

When to Run the Worksheet Again

The numbers you enter reflect a snapshot. Redo the worksheet whenever the snapshot changes:

You or a spouse starts or leaves a job. Any change in the number of jobs shifts the math. Mid-year starts are better handled through the online estimator, since the tables assume a full year of wages.¹
Your filing status changes. Marriage, divorce, or a spouse starting or stopping work all change which lookup table applies. Federal rules require a new W-4 within 10 days of a change that reduces the withholding you’re entitled to claim.⁵
A raise or pay cut moves either job into a different row or column of the table.

Even without a life change, run the numbers once a year. The IRS updates the lookup tables annually to reflect inflation adjustments and tax law changes; the 2026 tables incorporate changes from Public Law 119-21.⁶

What Happens If You Skip It or Get It Wrong

Skipping Step 2 or entering wrong numbers can leave you owing at filing time, and the IRS charges interest on the shortfall at a rate that changes quarterly. For the first quarter of 2026, that rate is 7%.⁷ You avoid the penalty if you meet any one of these safe harbors: you owe less than $1,000 after subtracting withholding and credits; your total withholding and estimated payments covered at least 90% of the current year’s tax; or your total payments equaled 100% of the prior year’s tax liability. The last threshold rises to 110% if your prior-year adjusted gross income exceeded $150,000, or $75,000 for married filing separately.⁸

If your household falls in the 110% range, add a small buffer to Step 4(c) rather than trying to hit the number exactly. A small refund costs less than a penalty.

1
Internal Revenue Service. Form W-4 (2026) Employee’s Withholding Certificate
2
Internal Revenue Service. FAQs on the 2020 Form W-4
3
Internal Revenue Service. Tax Withholding Estimator FAQs
4
Office of the Law Revision Counsel. 26 USC 3402 – Income Tax Collected at Source
5
Internal Revenue Service. Publication 505 Tax Withholding and Estimated Tax
6
Internal Revenue Service. 2026 Publication 15-T Federal Income Tax Withholding Methods
7
Internal Revenue Service. Quarterly Interest Rates
8
Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax