On 1 October 2026, the National Tax Agency (NTA) officially released the 2026 version (Reiwa 8) of the Year-End Adjustment Software, a critical tool for employers and payroll administrators to calculate annual income tax withholding for employees. This release incorporates the major tax reforms enacted in the FY2026 Tax Reform Act, most notably the increase in the Basic Exemption from 480,000 yen to 580,000 yen (for total income up to 24 million yen) and the revision of the Commuting Allowance Tax-Free Limit. The software automates the complex recalculation of withholding tax amounts, the preparation of Withholding Tax Records, and the generation of statutory reports for submission to tax offices by January 31, 2027.
Key Takeaways
- Basic Exemption Increase Implementation: The software automatically applies the raised basic deduction (100,000 yen increase), reducing year-end tax liability for the vast majority of salary earners and requiring employers to update master data immediately.
- Revised Commuting Allowance Limits: Reflects the increased monthly tax-free limit for commuting allowances (e.g., for long-distance commuters), impacting net pay calculations and social insurance premium bases.
- My Number Portal Integration: Enhanced linkage with My Number Portal allows pre-filling of dependent and deduction certificate data (insurance premiums, mortgage interest), minimizing manual entry errors and accelerating the adjustment process.
Disclaimer: This article is compiled and summarized by the AI based on publicly available information and is for general information purposes only. It does not constitute any form of formal tax advice, legal opinion, or basis for performance. Please consult a qualified professional tax advisor or legal counsel for tax advice.
Source: Read Official Announcement