1099 Tax Calculator — California

Start with the federal half, which is identical in every state. SE tax applies to 92.35% of net earnings — $69,263 × 15.3% = $10,597, split into $8,589 of Social Security and $2,009 of Medicare. Half of that ($5,299) comes back off your income, and federal income tax on the remainder lands near $4,511.

California is the third layer. It has no separate self-employment tax — it simply taxes your net Schedule C profit as ordinary income. On roughly $39,661 of taxable income this calculator estimates $3,688, pushing the combined bill to about $18,797 and leaving roughly $0.75 of every 1099 dollar in your pocket.

Read the state number as an upper bound. This site applies a single 9.3% rate to California, matching the state comparison table. California’s brackets are progressive, and a single filer at $75,000 sits below the top brackets, so your real effective California rate will be lower. The figure is useful for setting money aside, not for filing.

The state layer is the whole difference between here and a no-tax state: the same $75,000 earned in Texas carries $0 of state income tax, for a total near $15,108.

Figures assume no business expenses. Deductions reduce federal income tax, SE tax, and California tax at once — run yours through the deduction estimator.

The IRS gets Schedule C, Schedule SE, and Form 1040-ES. The Franchise Tax Board — California’s tax agency — gets Form 540 at filing and Form 540-ES during the year. Same income, two returns, two streams of payments. The FTB collects no self-employment tax of its own; the entire 15.3% is federal.

The FTB also doesn’t start from the same number the IRS does. California has no equivalent of the federal 20% QBI deduction, and its standard deduction is a fraction of the federal one, so the income California taxes is larger than the $39,661 of federal taxable income this page applies 9.3% to. That cuts the opposite way from the flat-rate approximation above, and it’s the smaller of the two errors — which is why the $3,688 still reads high. Set money aside against it; don’t file on it. The state tax rate table shows the same approximation applied to every other state.

Federal 1040-ES is four equal payments. Form 540-ES is not: 30% in April, 40% in June, nothing in September, 30% in January. Divide your California bill by four and you underpay the first two installments — the FTB charges an underpayment penalty (Form 5805) even if you pay the full year’s tax by January.

California’s trigger is lower than the federal $1,000: you owe estimated payments if you expect to owe $500 or more ($250 if married or an RDP filing separately) after withholding and credits. Its safe harbor mirrors the federal one — 100% of last year’s California tax, or 110% if your prior-year AGI was $150,000 or more. FTB Web Pay is free, and electronic payment becomes mandatory once a single payment tops $20,000 or your total tax for any year exceeds $80,000.

For the federal column: the quarterly tax calculator sizes each 1040-ES check from your own income, and the estimated tax payments guide covers the safe-harbor rules and what the IRS penalty actually costs if you skip a quarter.

State Disability Insurance — which also funds Paid Family Leave — is a withholding line on W-2 wages. Nothing is withheld from 1099 income, and nothing accrues: self-employment income on its own earns you no SDI or PFL benefits. This is the part most freelancers who left a W-2 job in California miss. The 15.3% self-employment tax buys Social Security and Medicare. It does not buy the state disability coverage that used to appear on your pay stub.

You can buy it back. Sole proprietors, independent contractors, partners, and managing members of an LLC taxed as a sole proprietorship can enroll in Disability Insurance Elective Coverage (DIEC) through the Employment Development Department — a third agency, billing separately from both the IRS and the FTB. There is no comparable opt-in for unemployment insurance; DIEC covers DI and PFL only.

It is not cheap, and the price is the reason most freelancers skip it. EDD sets the DIEC rate each year: for 2026 it is 8.84%of the net profit on your Schedule SE, billed in four equal quarterly installments. On this page’s $75,000 that is about $6,630 a year — roughly 63% of what you already pay in self-employment tax, on top of it. Profits at or below $4,600 pay a flat $406.64 instead.

Two rules make it a commitment rather than a year-to-year call: you must stay enrolled for two complete calendar years unless you close the business or leave California, and you must be six months into the plan before you can claim a benefit. You also need at least $4,600 of annual net profit to qualify, and EDD can cancel coverage if you fall short three years running. Decide before you need it, not after.