US Income Tax Calculator
Calculate US Income Tax step by step: Tax = progressive brackets applied to (gross income − standard deduction).
In short
Formula: Tax = progressive brackets applied to (gross income − standard deduction).
What this calculator does
Calculate US Income Tax step by step: Tax = progressive brackets applied to (gross income − standard deduction). Worked example, questions and limitations included.
Use it to turn Gross annual income, Filing status into a checked result you can compare, copy, or rerun with different assumptions.
The page shows the formula, a numeric worked example, and the assumptions that affect this tax calculation.
Inputs and what they mean
- Gross annual income
- — number value.
- Filing status
- — choice value.
How to use it
- Enter each value in the unit shown next to the box (use the unit converter first if your numbers are in other units).
- Check the breakdown to see every intermediate step.
- Read the limitations before relying on the result.
Formula
Brackets and standard deduction for tax year 2025 from IRS Rev. Proc. 2024-40.
Single and married-filing-jointly statuses only; head of household and married filing separately are not modelled.
Credits, itemized deductions and other adjustments are not included.
Tax = progressive brackets applied to (gross income − standard deduction).
Inputs used: Gross annual income, Filing status.
Worked example
Single filer, $80,000
- Taxable income = 80,000 − 15,000 = $65,000.
- 10% of 11,925 = 1,192.50; 12% of (48,475 − 11,925) = 4,386; 22% of (65,000 − 48,475) = 3,635.50.
- Total tax = 1,192.50 + 4,386 + 3,635.50 = $9,214.
Reading the result
The headline figure is the main answer. Any breakdown underneath shows the parts that make it up, so you can check the working and see what changes when you adjust an input.
Limitations and assumptions
- Tax year 2025 only.
- No credits, itemized deductions or other filing statuses.
- No state or local tax.
- Not tax advice.
- Estimates from official published rates for the stated tax year only. They ignore credits, deductions other than the standard deduction, and state or local taxes. Not tax advice — check with a qualified tax professional.
Common questions
Which tax year does this use?
Tax year 2025 (the return filed in 2026), from IRS Rev. Proc. 2024-40.
Does it include state income tax?
No. State and local taxes vary widely and are not modelled.
Does it include Social Security and Medicare?
No — those are payroll (FICA) taxes. Use the US take-home pay calculator for a net-pay estimate that includes them.
How do I use the US Income Tax Calculator?
Enter the required values for Gross annual income, Filing status. The calculator applies the formula on this page and shows the main result with any supporting breakdown so you can check the arithmetic.
What formula does the US Income Tax Calculator use?
Tax = progressive brackets applied to (gross income − standard deduction). The visible formula section above lists the calculation path and the edge cases the page handles, so the result can be checked without relying on the form alone.
Can the US Income Tax Calculator be used for exact decisions?
Use it as a calculation aid, not as a substitute for checking the underlying rule, contract, policy, or professional advice that applies to your situation. When a result depends on local rules, personal details, prices, or dates, enter those values yourself and confirm them before acting.
Related tools
Calculate US Take-Home Pay step by step: Take-home = gross − federal income tax − Social Security (6.2% up to the wage base) − Medicare (1.45%).
Calculate India Income Tax step by step: Tax = new-regime slabs on (gross − ₹75,000 standard deduction), minus the Section 87A rebate where it applies, plus 4% cess.
Calculate India Take-Home Pay step by step: Take-home = gross salary − income tax under the new regime (including cess).