Start with gross pay
Gross pay is what you earn before taxes and most deductions — salary for the period, or hourly rate × hours. Everything else on a stub is a subtraction (or sometimes an employer-paid benefit line that does not reduce cash).
Pre-tax vs after-tax deductions
Pre-tax items (often traditional 401(k) or certain health premiums in the US) reduce taxable wages before income tax is estimated. After-tax items (Roth contributions, garnishments, some benefits) come out of net pay. Canada has analogous ideas via TD1 claims and benefit elections, but the labels differ.
Income tax is not a single percentage
Progressive brackets mean higher slices of income face higher marginal rates. Your effective rate (total tax ÷ income) is usually lower than your top marginal rate. That is why “I am in the 22% bracket” does not mean 22% of every dollar disappears.
Payroll contributions
In the US, FICA covers Social Security and Medicare. In Canada, CPP (or QPP in Quebec) and EI (or QPIP approximations) apply. These are separate from income tax and often have wage bases or thresholds.
State / provincial layer
Some US states have no wage income tax; others use flat or progressive systems. Canadian provinces add provincial tax on top of federal tax. Local city taxes (NYC, some Ohio cities, etc.) can add another layer our calculators may not fully model yet.
Try it with numbers
Use the paycheck calculator with identical salaries in Texas and California to see how regional tax posture changes estimated take-home.
Frequently asked questions
Why doesn’t a calculator match my stub?
Withholding methods, benefits, local taxes, and year-to-date caps differ by employer. Treat calculators as planning tools.
Is filing status important?
Yes for US federal estimates. It mainly changes standard deduction and bracket application in simplified models.
Do no-tax states mean zero tax?
No. Federal income tax and FICA still apply. See our no-income-tax states guide.
Is this tax advice?
No. Educational estimates only.