SDI is a deduction from employees' wages. Employers withhold a percentage for SDI on all subject wages.The SDI withholding rate for 2025 is 1.2 percent. Effective January 1, 2024, all wages are subject to SDI contributions. You can complete the W4S with your estimated adjusted gross income and any income tax withheld to date to determine if withholdings are recommended. Where is the CA SDI tax reported on the W2 form? Employees paying to the California State Disability program will find the SDI deduction in box 19. Yep, I did it, a 5 star rating for a California State office. Every time I go in, it is less than a 10 minute wait. SmartAsset's California paycheck calculator shows your hourly and salary income after federal, state and local taxes.