Standard Monthly Remuneration (Hyōjun Hōshū Getsugaku)
What 'standard monthly remuneration' is, how it determines your social insurance premiums, and when it's updated.
【What it is】
Your actual monthly income mapped to one of approximately 50 standardized "grades." Social insurance premiums (health and pension) are calculated based on this grade, not your exact income.
【How it's set】
Each September, a new grade is determined based on your average April–June wages (annual determination). New hires get a grade based on their actual starting salary (interim determination).
【Example grades】
¥150,000/month → ¥150,000 grade → premiums calculated on ¥150,000
¥300,000/month → ¥300,000 grade → premiums calculated on ¥300,000
【On your payslip】
Look for the "標準報酬月額" note in the deductions section of your payslip.
【Watch out】
Working lots of overtime in April–June can raise your grade, increasing social insurance premiums from September onward.
使用範例
¥50,000 overtime/month Apr–Jun → grade rises one level → social insurance up ~¥2,000/month from September
這篇文章對您有幫助嗎？