State Disability Insurance pays for disability and family leave
The SDI line on a California paystub funds both disability insurance and Paid Family Leave, run by the Employment Development Department. Since the wage ceiling was removed, high earners pay SDI on all their wages: on $250,000 the salary table above shows $3,250.00. Some employers run an approved Voluntary Plan instead of the state plan; the calculator assumes the state plan.
No city income tax on wages
California cities don’t tax employees’ wages. San Francisco and Los Angeles levy business and payroll taxes, but those are paid by employers and don’t appear on your paycheck.
Bonuses and stock
Employers may withhold California tax on bonuses and stock options at a flat 10.23% under Revenue and Taxation Code section 18663, which rarely equals the tax actually owed. The calculator shows annual liability, so add a bonus to your yearly gross to see its real cost and compare that with what was withheld.
Credits the calculator doesn’t include
The California Earned Income Tax Credit, Young Child Tax Credit, renter’s credit and child and dependent care credit can lower or refund tax for eligible households. They depend on details beyond pay, so they are listed under “not covered” rather than estimated.