W-4 Multiple Jobs Calculator

Why two paychecks under-withhold on their own

Nothing is wrong with either employer's arithmetic. Payroll follows Publication 15-T, and that method annualises the wages it pays, subtracts the full standard deduction for your filing status, and runs the remainder up through the brackets from the bottom. It has no way of knowing another job exists. Do that twice and the household gets the standard deduction twice, and the low brackets twice — but the tax return only allows one of each.

For 2026 the standard deduction is $16,100 single, $32,200 married filing jointly and $24,150 head of household. A two-earner married couple whose employers each shield $32,200 has $32,200 of income sheltered that will not be sheltered on the return. Add the duplicated 10% and 12% bands and a four-figure balance due is the normal outcome, not an unusual one. Step 2 of Form W-4 exists solely to undo this.

Three ways to fix it — and which one the IRS prefers

Step 2 asks you to do exactly one of three things. They are not equally good, and the form is unusually direct about the ranking.

The checkbox works by telling both payrolls to halve the standard deduction and every bracket width — $16,100 each instead of $32,200 each, for a married couple. Two equal salaries then reassemble into exactly the right answer. Two very unequal ones do not: the small job burns through its halved low brackets almost immediately and withholds at rates the household never actually pays, and the size of that error grows with the gap between the two salaries.

Note also what Step 2(c) reveals. Ticking it tells your employer that someone in your household has another job. Form W-4 acknowledges this and offers Step 2(b) as the private alternative — the worksheet stays with your records and only a dollar amount reaches payroll.

The Step 2(b) worksheet, line by line

1. Line 1 — two jobs. Find the higher-paying job's annual taxable wages in the row headings and the lower-paying job's in the column headings, and take the value where they cross. Then skip to line 3. Married filing jointly with one job each uses this line too.
2. Line 2a — three jobs, first pair. Same lookup, using the highest-paying job as the row and the second-highest as the column.
3. Line 2b — three jobs, third job. Add the wages of the two highest-paying jobs together and use that combined figure as the row; use the third job's wages as the column.
4. Line 2c. Add lines 2a and 2b.
5. Line 3 — pay periods. The number of pay periods per year at the highest-paying job: 52 weekly, 26 biweekly, 24 twice monthly, 12 monthly.
6. Line 4 — the answer. Divide line 1 or line 2c by line 3. That per-paycheck amount goes on Step 4(c) of the highest-paying job's Form W-4, added to any extra you already wanted withheld.

Two constraints bound the whole exercise. The worksheet is completed on one Form W-4, not one per job. And it only covers up to 3 jobs with at most one paying above $120,000; past either limit, Form W-4 points to the extra tables in Publication 505 or to the online estimator.

2026 Multiple Jobs Worksheet tables

These are the tables printed on page 5 of Form W-4 (2026). Rows are the higher-paying job's annual taxable wage and salary; columns are the lower-paying job's. The value where they cross is the annual amount for line 1 or line 2a — divide it by pay periods before it reaches Step 4(c).

Reissued each year with the inflation-adjusted brackets, so a worksheet you filled in for a previous year no longer matches. The amounts rise steeply along both axes because the table is recovering a duplicated standard deduction plus a duplicated run through the lower brackets.

What goes on the other Forms W-4

Almost nothing, and that is the point. Steps 3 and 4(b) both reduce withholding, so entering them on more than one form subtracts the same dependents or the same itemized deductions twice. Form W-4 states the rule plainly: complete Steps 3 through 4(b) on only one Form W-4, and withholding is most accurate if that is the highest-paying job's.

• •Step 1 — filing status and personal details go on every form. This one is not shared.
• •Step 2(c) — if you use the checkbox, it must be ticked on both forms. If you use 2(b), the resulting Step 4(c) amount goes on one form only.
• •Step 3 — dependent and other credits, once. $2,200 per qualifying child under 17, $500 per other dependent, available at total income of $200,000 or less ($400,000 MFJ).
• •Step 4(a) and 4(b) — other income and non-standard deductions, once, on the same form as Step 3.
• •Step 4(c) — the only line that can sensibly appear on several forms, if you deliberately want extra withheld from more than one paycheck.

Common multiple-jobs mistakes

• Checking Step 2(c) on only one form. Half the fix produces roughly half the correction, and the household still owes.
• Using the checkbox on wildly unequal jobs. A $150,000 salary alongside a $15,000 weekend job will over-withhold noticeably. That is a large interest-free loan to the government, recovered only at filing.
• Doing both 2(b) and 2(c). They are alternatives. Doing both double-corrects and over-withholds.
• Claiming dependents on both spouses' forms. The single most expensive error in this whole area, because Step 3 subtracts full dollars from withholding rather than adjusting a rate.
• Never revisiting it after a job ends. Step 4(c) is a flat dollar amount that keeps withholding after the second job is gone. When a household drops back to one job, remove the entry and untick the box.
• Forgetting self-employment. A W-2 plus 1099 household owes self-employment tax the worksheet does not model. Form W-4 sends these cases to the estimator for exactly this reason.
• Assuming the state follows. Federal Form W-4 does not drive state withholding. Most states have their own certificate with its own multiple-jobs treatment.