What this site is
Tax Calculator US helps people estimate what they will owe and what they will keep from their pay under 2026 US federal and state income tax rules. Everything runs in your browser: the numbers you enter are not sent to us or stored.
We are an independent website. We are not a CPA firm, a law firm or a tax preparer, and we are not affiliated with the IRS or any state tax agency. We do not prepare or file returns and do not give advice about your specific situation.
How the calculations work
- Federal income tax uses the 2026 brackets and standard deductions for your filing status, then the Child Tax Credit.
- Social Security (6.2% up to the $184,500 wage base) and Medicare (1.45%, plus 0.9% above the high-income threshold) are added for employees.
- State income tax uses each state’s 2026 rates, standard deduction, personal exemption or credit, applied to wages after pre-tax contributions.
- Pre-tax 401(k) contributions lower income tax; pre-tax health, HSA and FSA contributions lower income tax and payroll tax.
What is not modeled: itemized deductions (except where a calculator asks for them), local city or county taxes, state disability or paid-leave payroll taxes, refundable credits, capital gains outside the capital gains calculator, and phase-outs of some state credits. Head of household and married filing separately use single-filer state tables. Results are estimates.
Sources and how we check them
Federal figures come from the IRS (Rev. Proc. 2025-32 and related guidance) and the Social Security Administration. State rates and brackets come from the Tax Foundation’s 2026 compilation. Each page lists its sources at the bottom and shows the date its figures were last checked. We re-check figures when annual tax numbers change, and only change a page’s date when its content actually changes.
How we use AI
We use AI tools to help write and build pages and calculators. AI is never treated as a source: every figure is checked against the primary sources listed on the page, and the calculators are plain, testable formulas.
Corrections
If you think a figure or explanation is wrong, tell us at techjits.com@gmail.com with the page address and, if you can, a link to the official source. See the contact page. For advice on your own return, talk to a licensed tax professional.