US Payroll Tax Data 2026 (Free CSV/JSON)

Download free 2026 US payroll tax data: federal FICA rates and income tax structure for all 50 states in CSV and JSON formats, with official sources cited.

The downloadable CSV and JSON provide a versioned reference snapshot of 2026 federal FICA constants and state individual-income-tax structure. State entries describe rate structures and source notes; they are not payroll withholding tables and do not calculate a worker's state withholding.

Federal reference values include the 6.2% employee Social Security rate up to the configured annual wage base, the 1.45% employee Medicare rate, and the additional Medicare threshold note. Employers and employees can have different obligations, and annual limits can change.

Sources include the IRS, Social Security Administration, and official state revenue agencies. Check the dataset metadata, review date, and linked authority before relying on a value; local taxes, credits, reciprocity, benefits, and employee elections are outside this reference dataset.