Understanding U.S. Federal Income Tax
A comprehensive overview of how federal taxes, standard deductions, and payroll taxes are calculated in 2026.
Progressive Tax Brackets
The U.S. federal tax code is structured into seven statutory tax brackets: 10%, 12%, 22%, 24%, 32%, 35%, and 37%. Income fills these tiers incrementally. Each dollar you earn is taxed strictly at the rate of the tier in which it sits.
Standard vs. Itemized Deductions
Deductions lower your taxable income before brackets apply. Taxpayers can claim either the flat standard deduction or itemize eligible personal expenses (such as mortgage interest and state/local taxes). Claiming the higher deduction maximizes your tax savings.
Marginal vs. Effective Tax Rates
Your marginal rate is the highest tax bracket applied to your last dollar of income. Your effective rate is your actual total federal tax liability divided by your gross annual income, showing your true blended tax burden.
FICA Payroll Taxes
The Federal Insurance Contributions Act (FICA) funds Social Security and Medicare. In 2026, employees contribute 6.2% toward Social Security (up to the wage base limit of $176,100) and 1.45% toward Medicare, with high earners paying an additional 0.9%.