A plain-language look at the factors behind our paycheck calculator, so you know what's going into your estimate.
Last updated: July 4, 2026Your paycheck estimate accounts for the standard layers of withholding that apply to most U.S. employees.
Calculated using current federal tax brackets based on your income and filing status.
Applied based on your selected state's tax rules — some states have no income tax at all, which the calculator accounts for.
The standard federal payroll tax that funds Social Security and Medicare, applied to nearly all employee wages.
Whether you're paid hourly or salaried, and how often you're paid, affects how your annual figures translate into each paycheck.
For final-paycheck scenarios, we also factor in state-specific rules about what must legally be included in a departing employee's last check, such as accrued unused vacation time where required by state law. See our final paycheck rules guide for the full breakdown, or head to the calculator itself to try the numbers yourself.
We review and update the tax brackets, state figures, and legal reference points behind both calculators on an ongoing basis to reflect current law and available data.
Tax brackets, state minimums, and legal reference figures change over time, sometimes with little notice. We monitor for these updates and revise our calculators when we identify a change, rather than on a fixed schedule — so if you notice something that looks outdated, we want to know.
Spotted something that looks off? Tell us on our Contact page and we'll take a look. Corrections help keep the calculators useful for everyone.
They are: free, fast tools to help you understand roughly where you stand, using publicly available legal and tax reference points.
They aren't: a substitute for a licensed attorney reviewing your specific case, or a CPA reviewing your specific tax situation. See our Legal Disclaimer for the full picture.