Japan Part-time Income Benchmarks

Show representative yearly income thresholds for tax, social insurance, and dependent deduction criteria by reference year.

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Calculation basis and official references

Reviewed on:

Formula basis

Convert annual income to salary income and check each wall by fiscal threshold, then overlay social insurance applicability rules by wage and hours.

Calculation method

This calculator gives a practical view of Japanese tax and social-insurance thresholds used by working students and part-time workers.

Exclusions and checks required

  • Tax and social-insurance thresholds are separate; both are evaluated independently.
  • Employer size, contract hours, company scale, and student status alter social-insurance treatment.
  • Policy changes such as temporary suspension of the 1,060,000 JPY wall should be confirmed by effective date and employer category.

Example input:：Part-time worker: 20 hours/week at 90,000 JPY/month

annualSalaryYen
1080000
monthlySalaryYen
90000
weeklyHours
20
employerEligibleEmployees
100
student
No
spouseDependent
Yes

Single income values cannot lock in spouse dependency or benefit continuity; confirm all conditions with authority guidance.

Official references

FAQ

Who is this calculator for?

Show representative yearly income thresholds for tax, social insurance, and dependent deduction criteria by reference year.

What values should I enter?

Applies to: Japan Customs & Living Expenses

How should I interpret this estimate?

This calculator gives a practical view of Japanese tax and social-insurance thresholds used by working students and part-time workers.

How to use

  1. Enter your input values and press Calculate.
  2. Review the result and compare it with expected context.

Official references