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GigTax

California Self-Employed Tax Calculator

Federal + 15.3% SE + California state income tax on 2026 1099 income. Includes CA's progressive brackets up to 13.3%.

California taxes self-employment income through progressive state brackets on top of federal and SE tax. Total effective rate for CA freelancers commonly lands between 28% and 40% of net profit.

Self-employed income & expenses

Estimate federal + SE + state tax for the 2026 tax year in one pass.

Estimated total tax bill
$13,930
Refund / owed
-$13,930
Effective rate
23.2%

Detailed breakdown

Mileage deduction$5,600
Total business expenses$8,100
Net self-employment income$51,900
Self-employment tax (15.3%)$7,333
½ SE deduction (above-the-line)$3,667
Adjusted gross income$48,233
Taxable income$32,133
Federal income tax$3,608
State tax (est.)$2,988
Quarterly estimated payment$3,260
Marginal rate21.3%

California city tax rates for self-employed workers (2026)

California cities do not levy a personal income tax, but several large cities charge a gross-receipts or business license tax on self-employment revenue, filed separately from your Form 540.

Local and state tax rates for self-employed residents of major California cities in 2026
CityLocal rateState rateWhat gig workers should know
Los Angeles0.10%–0.45% gross receipts (LABT)1%–13.3% stateBusiness tax registration required; small-business exemption under $100,000 in receipts if you file on time.
San Francisco0.053%–1.008% gross receipts1%–13.3% stateRegistration fee plus gross receipts tax; small-business exemption applies under roughly $2.5M.
San DiegoFlat business tax certificate (~$34–$125/yr)1%–13.3% stateNo local income tax; annual business tax certificate renewal.
San JoseFlat business tax (~$204/yr base)1%–13.3% stateSole proprietors pay the base rate; no local income tax on profit.
Sacramento0.04%–0.4% gross receipts1%–13.3% stateBusiness operations tax certificate required for home-based gig work.

California local and state filing deadlines

  • Q1 CA Form 540-ES (30%)April 15, 2026

    California front-loads estimates: 30% of the year's total is due in Q1.

  • Q2 CA Form 540-ES (40%)June 15, 2026

    The largest California installment.

  • Q3 CA Form 540-ES (0%)No payment

    California skips the September installment.

  • Q4 CA Form 540-ES (30%)January 15, 2027

    Final installment of the 2026 year.

  • CA Form 540 returnApril 15, 2027

    Automatic extension to October 15, 2027 to file, not to pay.

  • City business tax renewalVaries (LA: Feb 28; SF: May 31)

    Miss the deadline and you lose the small-business exemption.

  • Q1 federal 1040-ESApril 15, 2026

    Covers income earned January 1 – March 31.

  • Q2 federal 1040-ESJune 15, 2026

    Covers April 1 – May 31.

  • Q3 federal 1040-ESSeptember 15, 2026

    Covers June 1 – August 31.

  • Q4 federal 1040-ESJanuary 15, 2027

    Covers September 1 – December 31.

  • California conforms to federal AGI, so the $0.70 per business mile 2026 standard mileage rate reduces your state tax too.
  • State estimates are required if you expect to owe $500 or more ($250 if married filing separately).

See every California tax form you need to file — annual, quarterly, and local →

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