Tax year 2026 · updated August 23, 2026 · engine estimates
401(k) vs take-home pay (2026)
A traditional 401(k) deferral lowers federal (and usually state) taxable wages, so income tax withholding falls — but Social Security and Medicare generally still apply to the deferred amount. Below is the same $80,000 California single sample at 0% and 10% using the Takehome Cash engine.
Your pay
Estimated take-home
per paycheck
| Item | Paycheck | Annual |
|---|---|---|
| Gross | $80,000.00 | $80,000.00 |
| Federal income tax | $7,010.00 | $7,010.00 |
| Social Security | $4,960.00 | $4,960.00 |
| Medicare | $1,160.00 | $1,160.00 |
| State income tax | $2,547.85 | $2,547.85 |
| Total tax | $15,677.85 | $15,677.85 |
| Net / take-home | $56,322.15 | $56,322.15 |
Estimate only — not tax advice or full tax software. 2026 federal brackets and a simplified state model. Omits local taxes, most credits, and year-to-date wage-base tracking. Confirm with your pay stub or a tax professional.
Ten percent of $80,000 is $8,000 deferred. That money is still yours in the plan; it is not “tax” on this page. Net take-home drops by less than $8,000 because federal and California tax are computed on the remaining wages. FICA is almost unchanged if you have no cafeteria-plan health premium.
Roth 401(k) is not modeled: Roth deferrals do not reduce federal wages. Employer match does not appear on the employee stub as cash, so it is omitted. Annual IRS elective-deferral limits can cap a high-percent election; we do not enforce the dollar cap in v1.
The calculator starts at 10% so you can drag the percent toward zero and watch federal and state lines move. Health premiums (section 125) reduce FICA as well as income tax — a different lever than 401(k). Estimates only, reviewed August 23, 2026.
Sample estimates
| Sample | State tax | Federal + FICA | Est. annual net |
|---|---|---|---|
| $80k CA single, 0% 401(k) | $3,210.42 | $14,890.00 | $61,899.58 |
| $80k CA single, 10% 401(k) | $2,547.85 | $13,130.00 | $56,322.15 |
Engine estimates for tax year 2026 — not tax advice or a pay stub. Omits local taxes, most credits, and SDI/PFML. See methodology.
Related: $80,000 salary take-home · California paycheck calculator · Methodology
FAQ
Does a 401(k) reduce Social Security tax?
Usually no. Traditional elective deferrals stay in the Social Security and Medicare wage base. Pre-tax health premiums under a cafeteria plan generally reduce FICA wages.
What sample is shown?
$80,000 annual, California, single, 0% vs 10% traditional 401(k), no health premium, no extra withholding.
Is the 10% contribution gone?
It is withheld from the check and sent to the plan. This page reports cash take-home, not total compensation.