“I want to work within my spouse’s dependents coverage without pushing myself too hard, but how will the upcoming reform affect me?”
If you are working part-time or balancing housework and work, this is a common concern!
Starting around October 2026, major updates will be made to social insurance and work-hour regulations in Japan. Here is a clear breakdown for those who want to stay covered under social insurance as dependents or understand the income limit before paying personal income tax.
Major Reform: The “1.06 Million Yen Barrier” for Social Insurance Will Be Removed!
Previously, one of the key conditions for enrolling in social insurance (health insurance and employee pension) at companies of a certain size was earning 88,000 yen or more per month (approx. 1.06 million yen per year). This earnings threshold is officially being eliminated.
Going forward, the standard will shift from “how much you earn” to “how many hours you work per week.”
| Period | Key Criteria for Social Insurance Enrollment |
| Before Reform | Working 20+ hours/week AND earning 88,000+ yen monthly (at companies with 51+ employees, etc.) |
| After Reform (From Oct 2026) | Working 20+ hours/week (at companies with 51+ employees, etc. / Earnings threshold removed) |
In short, even if your hourly wage rises and your annual income exceeds 1.06 million yen, you will not be required to enroll in social insurance as long as you work under 20 hours per week.
Choose Your Goal: How Much Can You Earn? Key Target Lines
Set your target income and working hours based on whether you want to remain a dependent under social insurance or avoid paying personal income tax.
1. To Stay Covered Under Social Insurance as a Dependent and Protect Your Take-Home Pay
Recommended Target: Under 20 hours per week AND under 1.3 million yen per year
If you remain a dependent under your family member’s social insurance, you do not have to pay insurance premiums (which can cost tens to hundreds of thousands of yen annually) out of your own pocket. To maintain this status, make sure to meet two conditions:
- Keep scheduled working hours under 20 hours per week (To comply with the October 2026 social insurance rule).
- Keep annual income under 1.3 million yen (The standard threshold for social insurance dependent status).
Note: From April 2026, the 1.3 million yen assessment is based on the “expected annual income written in your employment contract” rather than temporary actual earnings. If your contractual annual salary is under 1.3 million yen, temporary overtime during peak seasons will not immediately cause you to lose dependent status.
2. To Keep Your Personal Income Tax at 0 Yen (Tax-Exempt)
Recommended Target: Up to 1.78 million yen per year (From tax year 2026)
The tax-exempt threshold for individual income tax is being raised, meaning you will not owe income tax on annual earnings up to 1.78 million yen.
Key Tip: Even if you exceed 1.78 million yen, tax will only apply to the portion above that amount. It will not cause a sudden drop where your net take-home pay becomes lower than what you earned before reaching the limit.
3. To Earn Higher Income Without Worrying About Net Pay Reversals
Recommended Target: No upper limit (Targeting 1.5 million yen or more per year)
If you work 20 or more hours per week and enroll in social insurance at your workplace, insurance premiums will be deducted, creating a temporary zone (around 1.06 to 1.25 million yen) where take-home pay decreases slightly. To push past this zone and significantly increase your net earnings, it is recommended to aim for 1.5 million yen or more per year. A major benefit of this route is that your future pension payouts will increase.
Summary: Your Strategy for Part-Time Work Moving Forward
If you want to make the most of working as a dependent, the strategy is very simple:
- To maximize take-home pay efficiency: Set your contract to under 20 hours per week (e.g., 19.5 hours) and aim for an annual income under 1.3 million yen.
- To earn as much as possible: Step outside the dependent framework, work 20+ hours per week, and target 1.5 million yen or more annually.
Take a look at your hourly wage and contractual hours to find the working style that best fits your goals!
