Your paycheck stub reveals the complex journey from gross pay to net pay — the amount that actually hits your bank account after federal income tax, state income tax, Social Security (6.2%), Medicare (1.45%), and voluntary deductions for retirement contributions, health insurance, and other benefits. For a $75,000 salary, the difference between gross and net pay is typically 25-35%, meaning you take home $48,750-$56,250 annually depending on your filing status, state, and benefit elections. Understanding each deduction helps you optimize your tax withholding (avoiding large refunds that represent interest-free loans to the IRS), maximize employer benefits, and accurately budget based on your real take-home pay. Our paycheck calculator computes your net pay from gross salary, federal and state tax withholding, FICA taxes, and pre-tax deductions, showing the exact breakdown for weekly, biweekly, semi-monthly, or monthly pay periods.
Federal and state tax withholding explained
Federal income tax withholding depends on your W-4 elections: filing status (single, married, head of household), number of dependents, and any additional withholding amounts. The IRS uses a progressive system — your employer applies the current year's tax brackets to your projected annual income from each paycheck. A single filer earning $75,000 annually with biweekly pay ($2,884.62 gross per period) has approximately $340-380 withheld for federal tax per paycheck. State income tax adds another 0-13.3% depending on your state: California (1-13.3%), New York (4-10.9%), Texas (0%), and Florida (0%) represent the spectrum. Nine states impose no income tax at all. Adjusting your W-4 to claim more allowances reduces withholding but may result in owing taxes at filing time.
FICA taxes: Social Security and Medicare
FICA taxes are flat-rate deductions that fund Social Security and Medicare. Social Security tax is 6.2% of gross pay up to the wage base limit ($168,600 in 2026) — your employer matches this amount, bringing the total to 12.4%. Medicare tax is 1.45% with no wage limit, plus an additional 0.9% surtax on wages exceeding $200,000 (single). Combined FICA for most workers is 7.65% of gross pay. On a $75,000 salary, annual FICA is $5,738 ($220.69 per biweekly paycheck). Unlike income tax, FICA has no deductions or credits — it applies to every dollar from the first paycheck. Self-employed individuals pay both halves (15.3% total) but can deduct the employer-equivalent portion on their tax return.
Pre-tax vs post-tax deductions
Pre-tax deductions reduce your taxable income, saving you money in taxes. Common pre-tax deductions include: traditional 401(k) contributions (saving 22-37% in taxes on each dollar contributed), health insurance premiums (average $500-700/month for family coverage, with employers typically paying 70-80%), HSA contributions ($4,150 individual / $8,300 family limit), FSA contributions ($3,200 limit), and commuter benefits ($315/month for transit or parking). Post-tax deductions — Roth 401(k) contributions, life insurance above $50,000 coverage, union dues, and charitable payroll deductions — do not reduce current taxable income but may provide future tax benefits (Roth) or other value. Maximizing pre-tax deductions is the most effective way to increase take-home pay — a $500/month 401(k) contribution costs only $350-390 in reduced net pay due to the tax savings.