California gambling tax calculator

California allows gambling losses only as an itemized deduction on the state return, whether or not you itemize federally. Take its standard deduction and it taxes your gross winnings.

Your numbers

State of residence

Total gambling winnings

For each winning bet, what it paid out less what you staked. Add these up for the year, before taking off any losses.

Total gambling losses

What you staked on your losing bets for the year. More than your winnings is normal.

Get a more accurate numberFiling status, other income, deductions and withholding

Filing status

SingleMarried filing jointlyMarried filing separatelyHead of household

Other taxable income

Wages and everything else, before deductions. Leave out Social Security.

Other itemized deductions

Mortgage interest, charitable gifts, and state and local tax up to its federal cap. Enter these even if you usually take the standard deduction. Your losses may make itemizing worth it, and the calculator compares the two for you.

Federal tax already withheld

State tax already withheld

Social Security benefits (optional)

The year’s total from Form SSA-1099, box 5, for both spouses on a joint return. A win can make more of it taxable. Leave blank if you have none.

Your age (optional)

Not givenUnder 6565 or older

At the end of 2026. Federal and some state deductions are larger at 65 or older.

Compare reporting methodsEvery wager, or netted by session

These three numbers require going through every bet of the year by hand and grouping them into days. We are building a paid tool to do this for you.

Days you placed a bet

Total of your winning days

Add up the net gain on every day that finished up.

Total of your losing days

Add up the net loss on every day that finished down, as a positive number.

The calculation runs on your device, so nothing is sent to work out your number. If you accepted cookies, what you enter is also sent to our analytics.

Your estimate

Enter your state, winnings, and losses to see an estimate.

Checked against California’s own sources on 2026-09-25.

How California treats gambling losses

California does not tie the deduction to your federal itemizing choice. You can itemize on the California return even if you take the federal standard deduction, but the losses count only if you do, in place of California's standard deduction.

The two examples below are the same numbers the calculator uses, worked at California rates.

Two examples, worked at 2026 California rates

A single filer with $60,000 of other income who takes the standard deduction on everything except gambling losses.

A losing year

You win $50,000 and lose $52,000, so you finish down $2,000.

Federal: $3,596
California: $364
Total: $3,960

You finished the year down and still owe tax.

Federally you itemize, so your losses offset your winnings, but the 2026 rule caps that deduction at 90 percent and leaves $3,200 taxable. California lets you deduct gambling losses as an itemized deduction on the state return, whether or not you itemize federally. Your California income, after the larger of the standard deduction and your itemized deductions, goes from $54,100 without the win to $60,000 with it. The extra $5,900 is taxed at graduated rates, which comes to $364.

A winning year

You win $50,000 and lose $10,000, so you finish up $40,000.

Federal: $10,350
California: $3,886
Total: $14,236

Federally you take the $16,100 standard deduction, which is worth more than itemizing, so your gambling losses do not reduce your federal tax at all. California lets you deduct gambling losses as an itemized deduction on the state return, whether or not you itemize federally. Your California income, after the larger of the standard deduction and your itemized deductions, goes from $54,100 without the win to $100,000 with it. The extra $45,900 is taxed at graduated rates, which comes to $3,886.

Full California rules, rates and sources