# W-4 calculator: additional amount to be withheld per paycheck (2026)

Form W-4 step 4(c) is a dollar box: “Extra withholding” / additional amount to be withheld each paycheck. It is not a tax rate and not the same as claiming dependents. Type that extra in the calculator. Cash take-home falls by about that amount each period; the annual federal liability sketch still comes from brackets — you are simply sending more to the IRS during the year.

Step 4(c) is an additional flat dollar amount per paycheck. Dependents (and other Step 3 credits) reduce withholding by estimating credits on the return; they are not a substitute for typing $50 in 4(c). Multiple jobs or a working spouse usually belong in Step 2 (checkbox or worksheet), not as a guess in 4(c). This page only models the extra dollar line.

Summer, seasonal, and part-year work matter. If you only receive 12 biweekly checks instead of 26, $50 extra per check is $600 for the year, not $1,300. The engine still annualizes as if the pay pattern runs all year — so for a short assignment, scale the extra yourself (target annual cushion ÷ remaining checks) rather than copying a full-year tip.

Worked example: $80,000 California, single, biweekly, no 401(k). With $0 extra, engine take-home is about $60,859.53 a year (~$2,340.75 per check). With $50 extra withholding per paycheck, annual cash falls by $1,300 to about $59,559.53 (~$2,290.75 per check). State tax and FICA are unchanged by this federal extra field.

People use extra withholding for a side gig, a spouse’s under-withheld job, or to avoid an April balance due. This page does not pick the “correct” extra — it shows what a chosen amount does to each check. Reviewed October 2, 2026.

## Sample estimates

### $80k CA biweekly, no extra

- Gross: $79,999.92
- Federal income tax: $8,769.98
- Social Security: $4,960.00
- Medicare: $1,160.00
- State income tax: $3,210.41
- Net / take-home: $60,859.53 (effective tax 23.9%)
- Per paycheck net: $2,340.75 (26 periods)

### $80k CA biweekly, $50 extra / check

- Gross: $79,999.92
- Federal income tax: $8,769.98
- Social Security: $4,960.00
- Medicare: $1,160.00
- State income tax: $3,210.41
- Net / take-home: $59,559.53 (effective tax 25.6%)
- Per paycheck net: $2,290.75 (26 periods)

Label: engine estimates, not pay stubs.

## FAQ

### How much should I withhold on my W-4?

This page does not pick the “correct” extra. Type a dollar amount for Form W-4 step 4(c) and see each check. For a second job, people use extra withholding or the W-4 step 2 checkbox (not modeled here).

### Is step 4(c) the same as dependents?

No. Dependents and Step 3 credits change estimated credits. Step 4(c) is a flat extra dollar amount per paycheck on top of the computed withholding.

### Per paycheck or per year?

The field is dollars per paycheck. Annual extra is that amount times the number of periods you actually receive (26 if biweekly all year).

## Related

- [California paycheck calculator](https://takehomecash.com/california-paycheck-calculator/index.md)
- [$80,000 salary take-home](https://takehomecash.com/80000-salary-take-home-pay/index.md)
- [Two jobs paycheck calculator](https://takehomecash.com/two-jobs-paycheck-calculator/index.md)