Tax year 2026 · updated October 2, 2026 · engine estimates
401k paycheck calculator / 401(k) contribution impact on take-home pay (2026)
Sample take-home: $60,859.58 a year · $5,071.63 a month · $2,340.75 biweekly.
Tax year 2026, California, single, standard deduction, no 401(k).
This is the “with 401k” landing page: the form starts at 10% traditional 401(k) on an $80,000 California salary. It is not the 401(k) versus take-home comparison essay, which spends its words on 0% vs 10% side by side.
Your pay
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Estimated take-home · CA · Annual
per year
See breakdown
| Item | Annual |
|---|---|
| Gross | $80,000.00 |
| Federal income tax | $7,010.00 |
| Social Security | $4,960.00 |
| Medicare | $1,160.00 |
| State income tax | $2,547.85 |
| CA SDI | $1,040.00 |
| Total tax | $16,717.85 |
| Net / take-home | $55,282.15 |
What this includes. Included: 2026 federal brackets + standard deduction (Rev. Proc. 2025-32), Social Security 6.2% up to $184,500, Medicare 1.45% (plus 0.9% additional Medicare over the threshold), and the state income-tax model (including states with no state income tax); CA SDI, WA Cares, and optional NYC when those lines apply. Not included: other local/city taxes, Child Tax Credit, EITC, itemized deductions, 401(k)/HSA/FSA unless typed in, garnishments. See methodology.
Estimate only — not tax advice or full tax software. 2026 federal brackets and a simplified state model. Locals other than optional NYC, CA SDI, and WA Cares are omitted. Confirm with your pay stub or a tax professional.
The calculator sample starts as a single filer. Change filing status above to see married or head-of-household take-home on this same wage. Numbers update as you type.
Paycheck breakdown
| Period | Gross | Taxes | Take-Home |
|---|---|---|---|
| Annual | $80,000.00 | $19,140.42 | $60,859.58 |
| Monthly | $6,666.67 | $1,595.03 | $5,071.63 |
| Biweekly | $3,076.92 | $736.17 | $2,340.75 |
| Weekly | $1,538.46 | $368.09 | $1,170.38 |
| Hourly | $38.46 | $9.20 | $29.26 |
Tax breakdown
| Line | Amount |
|---|---|
| Federal | $8,770.00 |
| State | $3,210.42 |
| Social Security | $4,960.00 |
| Medicare | $1,160.00 |
| CA SDI | $1,040.00 |
| Total tax | $19,140.42 |
| Effective rate | 23.9% |
| Net % of gross | 76.1% |
A traditional elective deferral reduces federal taxable wages and, in this model, typically California taxable wages. It remains in the Social Security and Medicare wage base. That is why FICA barely moves when you raise the 401(k) percent, while the federal and state income-tax lines fall.
Roth 401(k) is not modeled — Roth dollars do not reduce federal wages. Employer match is omitted because it is not employee cash. We do not enforce the annual IRS dollar cap.
Section 125 health premiums are a different lever: they generally reduce FICA as well. Reviewed October 2, 2026.
Sample estimates
| Sample | State tax | Federal + FICA | Annual take-home | Monthly | Biweekly |
|---|---|---|---|---|---|
| $80k CA single, 0% 401(k) | $3,210.42 | $14,890.00 | $60,859.58 | $5,071.63 | $2,340.75 |
| $80k CA single, 10% 401(k) | $2,547.85 | $13,130.00 | $55,282.15 | $4,606.85 | $2,126.24 |
Engine estimates for tax year 2026 — not tax advice or a pay stub. Omits local taxes, most credits, and SDI/PFML. See methodology.
What this includes. Included: 2026 federal brackets + standard deduction (Rev. Proc. 2025-32), Social Security 6.2% up to $184,500, Medicare 1.45% (plus 0.9% additional Medicare over the threshold), and the state income-tax model (including states with no state income tax); CA SDI, WA Cares, and optional NYC when those lines apply. Not included: other local/city taxes, Child Tax Credit, EITC, itemized deductions, 401(k)/HSA/FSA unless typed in, garnishments. See methodology.
Related: 401(k) vs take-home pay · W-4 extra withholding · Take-home pay calculator 2026
FAQ
What is preloaded?
$80,000, California, single, 10% traditional 401(k), tax year 2026.
Does 401(k) reduce Social Security?
Usually no. Traditional deferrals stay in the FICA base. Health premiums under a cafeteria plan generally reduce FICA wages.
How is this different from 401(k) vs take-home?
That page is a 0% vs 10% explainer. This URL is the with-401(k) calculator, already set to 10%.