An educational estimate — not tax advice.

Not professional advice

The information and estimates on this site are provided for general educational purposes only. They are not tax, legal, financial, or accounting advice, are not a substitute for advice from a qualified professional, and don’t create any advisory relationship. What you put on a W-4 changes how much tax is withheld from your pay — before you act, confirm your situation with the current-year Form W-4 and its worksheet, the IRS Tax Withholding Estimator, or a tax professional.

Estimates, not a guaranteed outcome

The calculator produces an estimate of the Line 4(c) figure, not a guarantee that you’ll owe nothing or get a refund. In particular:

• Table 1 lookup. We read the Multiple Jobs Worksheet grid from the current-year Form W-4 keyed by your higher salary, lower salary, and filing status. Table 1 is a banded grid — real incomes fall inside a range — so the annual amount is an approximation by the worksheet’s own design, and your actual tax depends on your full return.
• Per-paycheck division. The Line 4(c) number is the annual amount divided by your pay periods. If you choose the mid-year option, we divide over the pay periods remaining this year so the catch-up lands over the checks you have left; the standard option divides over the full-year count, matching the worksheet’s own division. We label which basis a result uses — but bonuses, raises, mid-year job changes, or other income can still shift your outcome.
• Two jobs only. Table 1 and Step 2(b) are built for exactly two jobs (or two earners filing jointly). For three or more jobs, or if more than one job pays a high salary, use the IRS Tax Withholding Estimator instead — this tool deliberately does the one worksheet path.

Time-sensitive and subject to change

The Form W-4 and its Table 1 are reissued every year, and the figures change. This tool reflects the current-year Form W-4 Multiple Jobs Worksheet as transcribed from the IRS source PDF, with a visible “Last updated” date and the tax year the result reflects. A stale table would be wrong — always confirm you’re working from the current-year form before you file your W-4.

Federal only

Line 4(c) is a federal withholding line. This tool covers federal withholding only; state withholding uses separate state forms and rules. And the W-4 can’t fix 1099 or self-employment income — that’s paid as quarterly estimated tax (see quarterlytaxplan.com).

Verify before you rely on it

For the authoritative worksheet and grid, use the current-year IRS Form W-4 (fw4.pdf); for the mechanics of adjusting withholding mid-year, see IRS Publication 505; and for complex cases use the IRS Tax Withholding Estimator. We do our best to keep figures accurate and to cite primary sources, but we make no warranty of accuracy or completeness and accept no liability for decisions made based on this site. See our terms of use.

No affiliation

Line 4C.com is an independent tool operated by Red Goggles LLC. It is not affiliated with, endorsed by, or connected to the Internal Revenue Service, any state tax agency, any payroll provider, or any employer.

Last updated: June 4, 2026