Why this site exists
Pay that is not a plain salary is hard to figure out. Tips, overtime and bonuses follow special rules, and self-employed people pay a tax that employees never see on a pay stub. Many calculators hide the math or skip the newest rules.
This site shows the result and the steps behind it. Under each calculator you will find the formula and a worked example, so you can check the numbers yourself.
Who runs it
KeepMath is an independent project run by one person. It is not run by a tax firm, an accountant or a payroll company, and nothing here is professional tax advice.
Where the numbers come from
- Tax brackets and the standard deduction for 2026 come from the IRS inflation adjustments (Revenue Procedure 2025-32).
- The Social Security wage base of $184,500 comes from the Social Security Administration's 2026 figures.
- Rules for the tips and overtime deductions follow IRS guidance on the 2025 tax law changes.
Each calculator states which filing statuses it supports. Where a rule is simplified, the page says so.
How we keep it current
Tax figures change every year. We update the calculators when the IRS and the Social Security Administration publish new numbers, and each page names the tax year it uses.
Found a mistake?
If a result looks wrong, please tell us through the contact page. Include the numbers you entered and the result you expected. Confirmed errors are fixed as soon as possible.
Please remember
Results are estimates for planning. Your real tax depends on your full return. For advice about your situation, talk to a qualified tax professional. Read the full disclaimer.