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Year-End Tax Adjustment 2026: Basic Deduction Goes Up, So Does the Dependent Income Threshold

If someone in your family only works a part-time job, the income threshold for them to still count as your dependent just went up by 130,000 yen.

Year-End Tax Adjustment 2026: Basic Deduction Goes Up, So Does the Dependent Income Threshold
  • The basic income tax deduction's base amount rises from 580,000 yen to 620,000 yen.
  • The minimum guaranteed employment income deduction rises from 650,000 yen to 740,000 yen.
  • The income ceiling for someone to still qualify as a tax dependent rises from 1,230,000 yen to 1,360,000 yen, effective from the December 2026 year-end adjustment.

Four things that changed this year

Under the Reiwa 8 (2026) fiscal year tax reform, the basic income tax deduction and related amounts have been raised.

First, the minimum guaranteed employment income deduction rose from 650,000 yen to 740,000 yen.

The basic income tax deduction also increases — the base amount rises from 580,000 yen to 620,000 yen.

For a dependent family member whose only income is from a part-time job, the maximum annual income to still qualify as a 'dependent' rose from 1,230,000 yen to 1,360,000 yen.

Who is affected, and what to do

The new rule takes effect on December 1, 2026; salary and withholding tax through the end of November remain unchanged.

Your employer will automatically recalculate using the new table during the December year-end adjustment. However, if this change means a family member now newly qualifies as a dependent, you need to submit a 'Dependent Deduction Declaration' form to your employer.

Words in this article

基礎控除きそこうじょ
basic deduction
給与所得控除きゅうよしょとくこうじょ
employment income deduction
扶養親族ふようしんぞく
tax dependent
年末調整ねんまつちょうせい
year-end tax adjustment
源泉徴収げんせんちょうしゅう
withholding tax
施行しこう
coming into effect
扶養控除等申告書ふようこうじょとうしんこくしょ
dependent deduction declaration form

Notes

This article was checked on September 29, 2026.

The exact amount that changes differs by person — check the National Tax Agency's page or ask your employer's HR staff.

Source: 国税庁 (24 Sept 2026)