Changelog

Generated from the rate files themselves. A rate cannot change without an entry here.

Date	Area	Change
25 October 2026	US federal 2026	Initial 2026 file.
25 October 2026	US states 2026	Initial file: 2 no-tax states, 7 flat, 5 bracket states. Pilot states TX, FL, CA, NY, IL complete to the level marked in status.
25 October 2026	US states 2026	All 50 states and DC entered from the Tax Foundation 2026 table. State paid-leave deductions for CA, CO, CT, DE, ME, MA, MN, NJ, NY, OR, RI, WA. City taxes for NYC, Yonkers, Philadelphia, Detroit, Baltimore City, Columbus. Each state carries a status flag and notes on what is simplified.
25 October 2026	UK 2026/27	Initial file from GOV.UK employer rates page. Scottish gross thresholds: starter to 16,537, basic to 29,526, intermediate to 43,662, higher to 75,000, advanced to 125,140 (band limits + 12,570).
25 October 2026	VAT 2026	Initial file. EU-27 from the Wikipedia table. GB/CH/NO/IS entered pending confirmation from the national authorities.