Sdi — Payroll Definition

What is State Disability Insurance (SDI)?

Some states and territories require short-term disability insurance or related worker contributions, and program names, coverage, rates, wage bases, and employer or employee shares vary. A deduction may appear as SDI, CASDI, TDI, or another jurisdiction-specific code. Because these rules change and can interact with paid-family-leave programs, verify the deduction with the current state agency instructions instead of applying one national rate.

How to apply this payroll definition

Locate the label beside its current-period amount, taxable-wage basis, and year-to-date total. Compare it with prior genuine statements, benefits materials, the employer's payroll documentation, and the primary source linked on this page. The same abbreviation can carry a different employer-specific meaning.

What the label does not prove

A familiar term or plausible amount does not authenticate a pay statement or confirm identity, employment, wages, deductions, tax compliance, or eligibility. Ask the verified payroll contact about an unknown code. Use current agency instructions or a qualified adviser when a rate, filing, benefit, garnishment, or legal decision depends on the answer.

Browse all payroll definitions or use the pay-statement codes guide.