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: First version, launched on overtimecalculators.com
- Overtime calculator: federal 40-hour rule; daily and seventh-day rules for California, Alaska, Nevada, Colorado and Kentucky; bonus and a second pay rate in the regular rate; hours as 8.5 or 8:30; pay stub check; take-home after Social Security, Medicare and federal income tax (IRS brackets and standard deduction).
- No tax on overtime calculator (IRC 225): W-2 box 12 code TT from 2026, the 2025 one-third method from IRS Notice 2025-69, the $12,500 / $25,000 cap and the income phase-out rounded down as on Schedule 1-A.
- No tax on tips calculator (IRC 224): the 71 occupations on Treasury’s final list (April 13, 2026) and the $25,000 per-return cap.
- Overtime laws for all 50 states and DC, from the Labor Department’s state table.
- Published test cases (also as test-cases.json) built from official worked examples; the site is not built if one fails.
- Corrected before publishing, after a line-by-line check against the sources: Form 1040 line 11b (not line 11) for income; teachers, doctors, lawyers and outside salespeople can be exempt without a salary test; California flat-sum bonuses noted as a limit; "every other state follows federal law" narrowed to "most".
- Added at launch after an independent audit: hospital 8/80, police and fire, and public-agency comp-time overtime count differently for the deduction (IRS FS-2026-13, Q17); Colorado’s across-midnight rule and Alaska’s 10-hour-day plans listed as not modelled; the nurse example replaced, since many hospital nurses are on 8/80 plans; Kentucky’s seventh-day rule reworded to the statute (KRS 337.050: it does not apply when the employer does not permit over 40 hours).