All calculators

Tax guides

How the numbers work

Detailed explainers behind our calculators — take-home pay, FICA, self-employment tax, and the assumptions we use so you can trust (and challenge) every estimate.

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How take-home pay works in the US

A plain-English walkthrough of gross pay, federal income tax, FICA, state tax, and pre-tax benefits — and what MyAfterTax estimates.

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How we estimate W-2 paychecks

Inside the W-2 calculator: federal brackets, FICA wage bases, state tax, and how traditional 401(k), HSA, and Section 125 benefits change taxable wages.

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Self-employment tax and 1099 income

How Schedule SE works (the 92.35% factor), Social Security and Medicare for contractors, deductible half of SE tax, and simplified QBI in our 1099 calculator.

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Net vs gross pay: converting either way

What “net” and “gross” mean on a paycheck, when to reverse from take-home to salary, and how our Net ↔ Gross tool uses the same engine as the W-2 calculator.