Verify a paycheck, line by line.

What this checks: regular/OT pay math, FICA (Social Security 6.2% / Medicare 1.45%) against taxable wages only, exclusion of accountable-plan per diem and reimbursements from FICA wages, the 2026 Social Security wage base cap ($176,100), federal income tax withholding using the IRS Publication 15-T (2026) Percentage Method for Automated Payroll Systems (Worksheet 1A) based on the W-4 selections entered, and that Total Pay − Taxes − Deductions reconciles to Net Pay. What it can't verify: state income tax withholding, which depends on the employee's state withholding form and that state's tables — shown for reference only, not flagged as an error. The federal check also assumes this paycheck is representative of a full, regular pay period; a one-off irregular check (first/last check, large bonus, etc.) may legitimately differ from the annualized estimate.