Income Tax in United States — 2026 Guide
Key insight: FICA (Social Security + Medicare) sits on top of income tax and isn't optional: Employees pay 6.2% Social Security (up to the annual wage base) plus 1.45% Medicare, both matched by the employer. Self-employed individuals pay both halves themselves as self-employment tax (15.3% combined). Most people underestimate their total deduction by focusing on income tax alone.
United States uses a progressive income tax system, with marginal rates rising from the lowest bracket up to a top rate of 37%.
At a glance
- Currency: USD ($)
- Tax year: 2026
- Top marginal rate: 37%
- Standard deduction (estimated): $15,000
- Typical filing deadline: April 15
- Tax authority: Internal Revenue Service (IRS)
- Payroll/social contribution: FICA (Social Security + Medicare)
How income tax works here
Most residents of United States pay tax on income earned during the 2026 tax year. Employers typically withhold tax throughout the year, with a final reconciliation filed after the year ends. Self-employed individuals and those with additional income sources usually need to file a return directly with the tax authority.
Use the calculator on this page to estimate your take-home pay: enter your gross annual income and see an instant breakdown of tax owed, effective rate, and net income.
Who has to pay it: residency rules
US citizens and green card holders are taxed on worldwide income no matter where they live. Other non-citizens are taxed based on the substantial presence test — a weighted day-count formula across the current and two prior years.
Payroll and social contributions
Employees pay 6.2% Social Security (up to the annual wage base) plus 1.45% Medicare, both matched by the employer. Self-employed individuals pay both halves themselves as self-employment tax (15.3% combined). This calculator's estimate covers income tax only — budget separately for FICA (Social Security + Medicare).
Common mistake to avoid
Assuming the top bracket rate applies to your entire income — a progressive system only taxes the portion of income that falls inside each bracket.
Important note on accuracy
The bracket figures on this page reflect United States's published 2026 tax-year rates. They do not account for every credit, allowance, surcharge, or regional variation that may apply to your situation. Always confirm your final tax position with Internal Revenue Service (IRS) or a licensed local tax advisor before filing or making financial decisions.