Tax Planning
Optimizing Tax Deductions under the FY2026 Personal Income Tax Reforms in Japan
Recent changes to basic exemptions and deductions in Japan open opportunities for individuals to reduce taxable income—if they act before the rules take effect.
By NomadicTax Research Team • 5-8 min read • September 16, 2026
## What Changed in FY2026 (令和８年度) Personal Income Tax Reforms
The Japanese government approved major reforms under **令和８年度税制改正の大綱** (“Framework of FY2026 Tax Reform”) which impact deductions and withholding tax rules for individual income. Key changes include:
| Element | Old Rule | New Rule | Effective From |
|---|---|---|---|
| **基礎控除** (Basic Exemption) for income tax | As before | Increased by **¥40,000** for those with total income ≤ ¥23,500,000 | December 1, 令和８年 (for taxable year 令和８年 and after) ([mof.go.jp](https://www.mof.go.jp/tax_policy/tax_reform/outline/fy2026/08taikou_gaiyou.htm?utm_source=openai)) |
| **給与所得控除** (Employment Income Deduction) lowest guaranteed amount | ¥650,000 | Raised to ¥690,000 | Same timing as above ([mof.go.jp](https://www.mof.go.jp/tax_policy/tax_reform/outline/fy2026/08taikou_gaiyou.htm?utm_source=openai)) |
| **扶養親族等の所得要件** (Income eligibility for dependents) and eligibility criteria for certain deductions | Existing thresholds | Adjusted under the new reform; see related Q&A from NTA ([nta.go.jp](https://www.nta.go.jp/users/gensen/2026kiso/index.htm?utm_source=openai)) |
## Why These Deductions Matter
- Increase in基礎控除 and最低給与所得控除等 helps **lower taxable income**, especially benefiting **middle and lower income earners** who may have previously paid more tax due to static thresholds during inflation.
- Changes affect not only annual tax returns but also **源泉徴収** (withholding tax) procedures from December 2026. Payroll admins need to adapt for 年末調整 (year-end tax adjustment). ([nta.go.jp](https://www.nta.go.jp/users/gensen/2026kiso/index.htm?utm_source=openai))
## Planning Tips to Maximize Benefits
- Review your **income forecast** for 令和８年 (the FY2026 taxable year) to see if you will qualify for deductions based on new thresholds.
- If you have dependents, examine whether your dependents meet the revised所得要件—some may no longer qualify depending on dependent’s income. Planning their income (e.g., sourcing income differently) could make a difference.
- For employees, ensure that deductions are properly declared via the required申告書such as 配偶者控除等申告書, 特定親族特別控除申告書, 基礎控除申告書, etc., before 年末調整. If missing, you may need to claim through確定申告. ([nta.go.jp](https://www.nta.go.jp/publication/pamph/gensen/aramashi2026/index.htm?utm_source=openai))
## Example Scenario
Consider Kenji, earning ¥20 million in salary during 令和８年, with a spouse earning less than the revised income eligibility threshold. Under the old system, he may not fully utilize spouse deductions. Under the new law, with increased 基礎控除 and lowered thresholds, he may now deduct more, reducing his tax liability by tens of thousands of yen. Ensuring correct submissions of deduction declarations now will lock in this savings.
## Action Checklist before Rule Takes Effect
1. Estimate your income and dependent incomes before December 2026.
2. Collect documentation for dependents, insurance, etc., to satisfy new criteria.
3. Update payroll withholding settings if you’re an employer—train staff on the changes.
4. For freelancers, include these deductions in your self-filing plans early.
By understanding and applying these reforms proactively, individuals can reduce their tax bills and avoid being caught off guard by transitional rules.