California · 1099 quarterly taxes · 2026

1099 Quarterly Taxes in California (2026)

Last reviewed May 22, 2026 · Sourced from IRS Rev. Proc. 2025-32 and state revenue agencies

Estimates only — not personalized tax advice. See disclaimer.

If you're self-employed in California — freelancer, contractor, gig worker, or single-member LLC — you owe quarterly estimated taxes to two agencies: the IRS (federal) and the California Franchise Tax Board (state). California has the most aggressive state income tax in the country, so getting your estimates right matters more here than almost anywhere else.

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Updated May 6, 2026 2026 · Sources: California FTB, IRS Form 1040-ES

Income tax

California state income tax (2026)

California uses a progressive bracket system on top of federal tax. For single filers in 2026:

Income	Marginal rate
$0 – $10,756	1.0%
$10,756 – $25,499	2.0%
$25,499 – $40,245	4.0%
$40,245 – $55,866	6.0%
$55,866 – $70,606	8.0%
$70,606 – $360,659	9.3%
$360,659 – $432,787	10.3%
$432,787 – $721,314	11.3%
$721,314+	12.3% (+1% mental health surcharge over $1M)

California also charges a 1% Mental Health Services Tax on income over $1 million, bringing the top combined rate to 13.3%.

Due dates

Quarterly payment due dates

Federal due dates apply nationwide: April 15, June 15, September 15, 2026, and January 15, 2027.

California FTB due dates are the same as federal, BUT California's quarterly schedule is unusual: instead of paying 25% per quarter, the FTB expects:

Q1 (April 15) — 30% of total estimated tax
Q2 (June 15) — 40%
Q3 (September 15) — 0%
Q4 (January 15, 2027) — 30%

This trips up new freelancers who assume California works like federal. Skipping Q3 is correct; under-paying Q1 or Q2 triggers penalties.

How to pay

How to pay California estimated taxes

The fastest way is FTB Web Pay: ftb.ca.gov/pay — bank transfer, no fee. You can also mail Form 540-ES with a check, or pay via the FTB mobile app. Credit card payments incur a 2.3% fee through ACI Payments.

Deductions

Common deductions for California freelancers

California allows the same self-employment business expenses as federal.
Half of SE tax is deductible federally but not on the CA return — you'll need to add it back on Schedule CA.
QBI deduction does not apply on California taxes (CA doesn't conform to IRC Section 199A).
SEP-IRA / Solo 401(k) contributions reduce both federal and California taxable income.

City taxes

City-level taxes that surprise California freelancers

California's state-level math is only half the story. Major cities have their own business taxes that hit self-employed people directly:

San Francisco Gross Receipts Tax (GRT): Self-employed individuals and single-member LLCs operating in San Francisco owe GRT once gross receipts attributable to SF exceed $2.25 million annually. Below that threshold you owe nothing — but registration is still required if your business has any SF nexus. The GRT rate varies by industry, generally 0.05%-0.65% on attributable gross.
San Francisco Business Registration Fee: $52-$45,000 annually based on revenue. Most solo freelancers fall in the $52-$262 bracket but registration is required.
Los Angeles Business Tax (BTRC): All LA-based freelancers must register for a Business Tax Registration Certificate. Rates vary by classification: "professionals" (consultants, designers, writers) pay $1.27 per $1,000 of gross receipts; "businesses" pay $1.01 per $1,000.
Mello-Roos (Bay Area + suburbs): If you have a home office in a Mello-Roos community-facilities district, the special property assessment isn't deductible as a home-office expense beyond the standard property-tax portion.

Classification

The AB 5 + Dynamex 1099 classification trap

California's AB 5 (and follow-on Prop 22) created the strictest worker-classification rules in the country. The "ABC test" presumes anyone working for a California business is an employee unless ALL three of these are true:

(A) The worker is free from the company's control over how they perform work,
(B) The work is outside the usual course of the company's business, and
(C) The worker is customarily engaged in an independently established trade or business.

Practical implication: if a CA company hires you as 1099 to do work that's central to their business (e.g., a SaaS company hiring a "1099 software developer" to build features), they may legally be required to make you W-2. This affects you in two ways: you might be missing out on benefits you're entitled to, AND if the IRS or CA EDD reclassifies retroactively, your "1099 income" might convert to wages with payroll tax owed by the company (not you, generally).

Most legitimately-independent freelancers (multiple clients, your own business setup) clear the ABC test fine. But solo-client engagements lasting many months in CA are a yellow flag worth a CPA consult.

High income

High-income California freelancer math

California's bracket structure is steep at the top:

Net SE income $200k: ~$15,000 CA tax (~7.5% effective)
Net SE income $500k: ~$50,000 CA tax (~10% effective, hitting the 10.3% bracket)
Net SE income $1M: ~$120,000 CA tax (~12% effective, hitting the 13.3% top bracket — which already includes the 1% Mental Health Services surtax on income over $1M)

Above $1M, California's top rate of 13.3% (12.3% top bracket + 1% MHS surtax, combined into the 13.3% headline) plus federal (37%) plus self-employment (2.9% Medicare on excess) plus Additional Medicare (0.9%) puts the marginal rate above 50%. High-income CA freelancers should run S-corp election math and consider whether splitting time to a no-tax state is worth the complexity.

Residency

The CA-vs-other-state question for tech freelancers

Many CA-based tech freelancers move to TX, FL, NV, or WA to escape state tax. The catch: California aggressively audits "departures" and applies a "domicile" test that goes beyond just "where I sleep most nights." The Franchise Tax Board looks at:

Where your driver's license is
Where you're registered to vote
Where your spouse and kids physically live
Where your physician, accountant, gym, and dentist are
Where you receive mail
How many days you spent in CA (the 183-day rule kicks in)

Half-measures — keeping a CA apartment, returning monthly — typically fail FTB scrutiny. Genuine residency change requires severing CA ties and establishing them elsewhere.

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