California has one of the most progressive state income tax systems in the United States, with nine marginal brackets stretching from 1% all the way up to 12.3%, plus an extra 1% mental-health surcharge on taxable income above one million dollars. Stack that on top of federal income tax and FICA payroll taxes, and a six-figure salary can feel a lot smaller by the time it hits your bank account.
This California tax calculator estimates your 2024 take-home pay by applying the official IRS federal brackets, the California FTB state brackets, and the Social Security and Medicare payroll taxes to your gross salary. Enter your annual income, pick your filing status, and add any pre-tax 401(k) contribution you already make — every figure updates instantly so you can see exactly where your money goes.
How to Use
- Enter your Annual Gross Income — the full salary your employer reports on your W-2 before any pre-tax deductions. If you have side income, add it in as well; the tool treats the total as ordinary earned wages.
- Choose your Filing Status. This drives both the federal and California standard deduction amounts and the bracket thresholds. Single filers use the narrowest brackets; married couples filing jointly use roughly double the thresholds.
- Add your Pre-Tax 401(k) / 403(b) Contribution if you make one. Traditional pre-tax deferrals reduce both federal and California taxable income dollar-for-dollar (Roth contributions do not, so do not count them here).
- Read the result card from top to bottom: federal income tax, California state tax, Social Security tax, Medicare tax, then total tax, annual net pay, monthly take-home, and your effective tax rate.
- Slide the pre-tax contribution upward to see how much tax you save on each additional dollar deferred to your retirement plan.
- Compare two scenarios — for example, a raise of $10,000 versus an extra $10,000 into your 401(k) — to see which leaves you with more cash in pocket.
The engine uses marginal brackets: only the dollars inside each band are taxed at that band's rate, so raising your income into a higher bracket never makes the dollars below it taxable at the new rate.
How California State Tax Is Calculated
California uses a progressive marginal structure (2024 tax year, single filer):
| Bracket (over) | Rate |
|---|---|
| $0 | 1% |
| $10,756 | 2% |
| $25,499 | 4% |
| $40,245 | 6% |
| $55,009 | 8% |
| $69,783 | 9.3% |
| $360,659 | 10.3% |
| $466,848 | 11.3% |
| $698,271 | 12.3% |
The California standard deduction is about $5,540 for single filers and $11,080 for married couples filing jointly for 2024. There is no special capital-gains rate at the state level — long-term gains are taxed as ordinary income, which surprises many new arrivals from states that give gains a break.
Federal income tax follows the 2024 IRS brackets (10%, 12%, 22%, 24%, 32%, 35%, 37%) on top of the $14,600 single / $29,200 married-joint standard deduction. FICA adds 6.2% for Social Security on wages up to $168,600, plus 1.45% Medicare on every dollar with no cap.
Examples
Example 1 — A single software engineer at $75,000. With no 401(k) contribution, federal taxable income is $60,400; federal tax is about $8,341. California taxable income is $69,460, and state tax is about $3,034. Social Security takes $4,650 and Medicare $1,088. Total deductions are about $17,113, leaving net pay of $57,887 per year, or roughly $4,824 per month — an effective tax rate of about 22.8%.
Example 2 — Married couple, $150,000 household income, $10,000 into 401(k). Adjusted gross is $140,000. Federal tax after the $29,200 joint deduction is around $14,482. California state tax is about $8,580. FICA totals $11,475. After all deductions the household keeps $115,483, or about $9,624 per month.
Example 3 — A six-figure earner at $250,000 single. Federal tax jumps to about $53,015, California state tax to roughly $19,305, and FICA to about $14,528 (Social Security still caps at the $168,600 wage base, and the 0.9% Additional Medicare kicks in above $200,000). Total tax is around $86,848, leaving $163,152 net — an effective rate near 34.7%, even though the marginal federal rate is 32% and the marginal California rate is 9.3%.
Example 4 — High earner above $1M. On $1,200,000 of single wages, federal tax is about $396,786 and California state tax about $131,208 (including the 1% mental-health surcharge). FICA totals about $36,853 because Social Security stops at $168,600 and the 0.9% Additional Medicare Surtax kicks in above $200,000. Total deductions are roughly $564,847, leaving about $635,153 net — an effective rate around 47%.
FAQ
How much is taken out of a paycheck in California?
On a typical $75,000 single salary, expect roughly 22–23% to go to federal tax, California state tax, and FICA combined. That breaks down to about $8,300 federal, $3,100 state, and $5,700 FICA annually, or about $1,430 per month withheld. Your employer's W-4 elections can shift the timing of withholding but not the final annual bill.
Does California tax Social Security and capital gains?
California does not tax Social Security retirement benefits, which is a major advantage for retirees. It does tax long-term capital gains as ordinary income at your full marginal rate — up to 13.3% at the top — unlike the federal government, which gives long-term gains preferential 0/15/20% rates. That is one of the biggest shocks for people moving to California from a no-income-tax state.
What is California's top tax rate?
The top marginal rate is 12.3% on taxable income above $698,271 (single, 2024). On income above $1,000,000, an extra 1% mental-health services tax pushes the top effective state rate to 13.3%. That 1% surcharge was originally temporary but has been extended repeatedly and is currently scheduled through 2030.
Why is my effective tax rate lower than my marginal rate?
Marginal rate is the rate you pay on your next dollar. Effective rate is total tax divided by total income. Because the first dollars you earn are taxed at 1% federally (and 1% in California), the average across all your income lands well below the top bracket you hit. For someone earning $250,000, the marginal federal rate is 32% and California's is 9.3%, but the combined effective rate is closer to 35%.
Does contributing to my 401(k) reduce California tax?
Yes. Traditional pre-tax 401(k) and 403(b) elective deferrals reduce both federal and California taxable income. A $10,000 pre-tax contribution in the 24% federal + 9.3% state bracket saves about $3,330 per year. Roth contributions do not save tax today, but qualified withdrawals in retirement are federal- and California-tax-free.
Are there any deductions this calculator does not include?
This tool uses the standard deduction. It does not itemize mortgage interest, SALT (which is capped at $10,000 federally), charitable gifts, student-loan interest, or the Child Tax Credit. If you itemize, your actual tax will be lower than the estimate. Run the numbers against your prior-year return to calibrate.
Is FICA the same for everyone in California?
Yes. Social Security is 6.2% on wages up to the annual wage base ($168,600 in 2024) and Medicare is 1.45% on every dollar. There is no state-level payroll tax on employees in California beyond the state income tax itself, though employers pay their own matching FICA. High earners also owe an extra 0.9% Additional Medicare on wages above $200,000 single.
Related Calculators
- Capital Gains Calculator — estimate federal tax on short- and long-term investment gains.
- After-Tax Calculator — compare gross salary to net take-home in other states.
- California Property Tax Calculator — estimate your annual 1% proposition-based property tax.
- 401(k) Calculator — project how your retirement contributions grow over time.
- IRA Contribution Calculator — check your 2025 Roth IRA limit and MAGI phase-out.
Disclaimer
This California tax calculator is provided for informational purposes only and does not constitute tax, legal, or financial advice. Estimates use simplified 2024 federal and California brackets and the standard deduction; they do not account for itemized deductions, credits, dependents, Additional Medicare Tax, local taxes, or quarterly estimated payments. Actual tax liability depends on your full return. Consult a qualified CPA or enrolled agent before filing or making financial decisions.