StateTakeHome computes what you actually keep from your paycheck — for all 50 US states, DC and every Canadian province. 2026 federal, state and FICA rates, each verified against the IRS, the SSA and every state's Department of Revenue, with an explicit data vintage on every page.

Beyond the calculators, the whole tax engine's output is published as open data: 11 CC BY 4.0 datasets (take-home pay by state, property tax for 3,125 counties, sales tax, federal brackets) with DOIs on Zenodo and Harvard Dataverse — free to reuse, including commercially. Embeddable widgets are available for anyone who wants to put a paycheck calculator on their own site.

No signup, no paywall, no data collection.