Key Changes in FY2026 Tax Reform
Japan’s 令和８年度税制改正の大綱, approved in December 2025, introduces several critical changes to individual income taxation, many of which take effect April 1, 2026.(mof.go.jp) Notably:
- Basic deduction (基礎控除) is raised for individuals with aggregate income (合計所得金額) up to ¥23,500,000. For example, those below that threshold can now claim ¥620,000 (up ¥40,000).(mof.go.jp)
- Lowest guarantee for employment income deductions is likewise adjusted upward, helping reduce taxable income for salaried workers.(mof.go.jp)
- Minimum taxable income, or the threshold under which income isn’t taxed heavily, is exceptionally raised to ¥1,780,000, offering more relief for low-to-middle income earners.(mof.go.jp)
Implications for Expats and High Earners
These reforms significantly affect those filing in Japan:
- If you’re an expat earning ¥20–25 million gross income, the increased deductions may translate to considerable tax savings—especially if you're filing as a resident taxpayer.
- For high earners above certain thresholds, the threshold for deductions begins tapering off, meaning that some of the benefit phases out.(mof.go.jp)
Planning Tips for Expats
- Reevaluate your withholding tax rates and estimated income to avoid surprises at year-end.
- Consider whether increased deductions make it worthwhile to split income (if possible) or adjust compensation structure.
- Document overseas allowances, commuting and meal provisions—they may benefit from increased non-taxable limits.(nta.go.jp)
Example Scenario
Let’s say Maria is a foreign national living in Tokyo. She earns ¥24,000,000 annually and previously claimed a basic deduction of ¥580,000. With the changes:
- Her basic deduction now drops because her income exceeds ¥23,500,000—but those close to the threshold see benefit.
- Her effective taxable income may still rise compared to past years, so keeping careful records of deductible expenses and allowances matters more than ever.
Actionable Checklist
- Review your income level relative to new thresholds and deductions.
- Monitor payslips to ensure correct deduction amounts are applied.
- Consult with a tax advisor to optimize deductions, especially if you have foreign income, investments or complex sources of revenue.
- Stay updated: rulebooks like "源泉徴収のあらまし" explain new non-taxable commuting and meal expense limits.(nta.go.jp)
Bottom line: Japan’s FY2026 reform shifts meaningful weight toward fairness and inflation adjustment. If you’re an expat—or pay taxes in Japan—these changes can help, but only if you plan around them.