Filing and paying California income tax
- Return
- Form 540 for full-year residents. The Franchise Tax Board's CalFile lets many residents file directly for free.
- Deadline
- April 15, 2026 for 2025 returns. California grants an automatic extension to October 15, 2026 to file, with no form needed, but any tax owed is still due April 15.
- Estimated payments
- California front-loads them: 30% of the year's estimate by April 15, 40% by June 15, nothing in September, and the last 30% by January 15. The federal schedule is four equal payments.
To see how California sits against every other state on top rate, bracket count and standard deduction, see state income tax rates for 2026 — all 51 jurisdictions in one sortable table.
How California Income Tax Compares to Neighboring States
Total income tax (federal + state) on a $100,000 annual salary in 2026, single filer using the standard deduction:
| State | State Tax | Total Income Tax | vs. California |
|---|---|---|---|
| California (here) | $5,055 | $18,225 | — |
| Oregon | $7,148 | $20,318 | +$2,093 |
| Nevada | $0 | $13,170 | -$5,055 |
| Arizona | $2,098 | $15,268 | -$2,957 |
A negative "vs." figure means that state collects less total income tax than California. Federal portion is identical across states; only state tax varies.
Frequently Asked Questions
What is the California state income tax rate for 2026?
California state income tax for 2026 ranges from 1% on the lowest bracket to 13.3% on income above $1,000,000 (single filer). Most earners stay below the top bracket; the top rate applies only to high earners. The Franchise Tax Board publishes California's 2026 brackets and deduction late in the year. Until it does, 2026 estimates here use the 2025 amounts, which is also what the FTB's own 2026 estimated-tax instructions tell filers to use.
How much income tax will I pay in California on a $100,000 salary?
For a single filer earning $100,000 in California in 2026, expect approximately $13,170 in federal income tax and $5,055 in California state income tax — for a total income tax of about $18,225, an effective rate of 18.2%. This excludes FICA (Social Security and Medicare), which adds roughly 7.65% on top.
Does California tax capital gains at a lower rate?
No. California taxes all capital gains as ordinary income, at the same rates as wages, up to 13.3%. There is no separate long-term rate as there is federally.
Does California tax Social Security and retirement income?
California does not tax Social Security benefits. Pensions and IRA or 401(k) withdrawals are taxed as ordinary income, and early withdrawals before age 59½ owe an extra 2½% California tax.
Do the federal no-tax-on-tips and overtime deductions apply in California?
No. California generally does not conform to the 2025 federal tax law, so the deductions for tips, overtime, car loan interest, and seniors lower your federal tax only.
When are California estimated tax payments due?
For 2026: 30% of the year's estimated tax by April 15, 2026, 40% by June 15, 2026, and 30% by January 15, 2027. No payment is due in September, unlike the federal schedule.
For the preferential federal rates on long-term gains, see the Capital Gains Tax Calculator. For the federal brackets, standard deduction, and Social Security wage base that sit underneath this state calculation, see 2026 Tax Calculators.