Tax rule update log

Per-year ruleVersion and settlementStatus. Your entered information is never altered automatically; only derived calculations update.

2025 · jp-personal-2025-v1 · settled
FY2025 module. Settled. Calculation logic is separate from entered data.
2026 · jp-personal-2026-v2 · provisional
Figures for 令和8年分 (tax year 2026) follow the MOF 大綱 (tax reform outline) / NTA 2026kaisei pamphlet (permanent + temporary layers). Official R08 forms are expected around late January 2027; do not print or file until settlementStatus is settled and forms are verified.