State Income Tax — Payroll Definition

What is State Income Tax (SIT)?

State income-tax withholding varies by jurisdiction. Some states do not tax wage income, while others use flat or graduated rates and their own withholding forms. Work location, residence, reciprocity agreements, local rules, and employer setup can all affect what appears on a pay statement. Check the current instructions from each relevant state revenue department rather than relying on a nationwide percentage.

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.