Baito Wage Calculatorバイト 給料 計算 — with the night premium
Estimate what a part-time job will actually pay each week and month. Enter your hourly rate and hours; the calculator applies the legal 25% late-night premium and warns students about the 28-hour weekly limit.
Per week
¥18,000
Per month (≈)
¥77,940
Total hours/week
15 h
Estimate only — before tax and any transport allowance. Actual pay depends on your contract and prefecture minimum wage. See how part-time pay works.
The 25% night premium
By law, work between 22:00 and 05:00 pays at least 25% more than the base rate. A konbini night shift at ¥1,200/hour must pay ¥1,500 during those hours — enter your night hours separately above to see the difference. More detail in how much part-time jobs pay in Japan.
The 28-hour student limit
Student-visa holders with a 資格外活動許可 may work up to 28 hours per week (40 during official school vacations). The calculator flags you when your total crosses 28. Working over the cap is unauthorised work and can affect your visa — see the 28-hour rule explained.
How to use it, step by step
- Enter the hourly wage from the job ad.
- Enter your daytime hours per week.
- Enter, separately, any weekly hours between 22:00 and 5:00, which earn the late-night premium.
- Read the weekly and monthly estimates, and check the warning if you are a student over 28 hours a week.
Frequently asked questions
Is the late-night premium required by law?
Yes. Under the Labour Standards Act, work between 22:00 and 5:00 must be paid at least 25% above your normal hourly wage.
Is overtime paid extra too?
Yes. Hours over 8 a day or 40 a week earn at least 25% extra. If overtime also falls between 22:00 and 5:00, the two premiums add up to at least 50%.
Is the result my take-home pay?
No. It is an estimate of gross pay. Income tax may be withheld, and if you work enough hours you may also pay social insurance, so the amount paid into your bank account will be lower.
Is the transport allowance included?
No. Transport allowance (交通費) is paid separately by most employers, so add it on top if the job offers it.
What is the minimum wage?
It is set separately for each prefecture and revised every year around October. Your hourly wage, including during training, must not be below your prefecture’s minimum.
Ready to apply?
Found a job worth chasing? Build the resume for it on the part-time resume page, or explore more resume tools.