Observed arrival · 2026-09-07
Check the Worksheet audits Massachusetts child-support arithmetic
A public-interest investigation reproduces Massachusetts child-support calculations in code and compares one fact pattern across fifty jurisdictions.
Field notes
The calculator exposes inputs for two incomes, children, custody arrangement, insurance, and child care, then runs a JavaScript port of the Massachusetts worksheet and tax model in the browser. The page displays a $1,015 weekly equal-time order for its $201,000/$29,640, three-child example and links Python models, tests, CSV data, and source documents. Its fifty-jurisdiction comparison is deliberately narrow: the site says it uses one fact pattern rather than a distribution.
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