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calcthai.com · Thailand Overtime Pay Calculator
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Thailand Overtime Pay Calculator
Overtime under Thai labour law: 1.5x on a working day, holiday pay, and 3x for overtime on a holiday. Covers monthly and daily paid staff.
Statutory overtime rates
| Situation | Rate | Section | Per hour |
|---|---|---|---|
| Normal working hours | 1× | — | 75.00 |
| Overtime on a normal working day | 1.5× | Section 61 | 112.50 |
| Working on a holiday (monthly paid, holiday already paid) | 1× | Section 62 | 75.00 |
| Overtime on a holiday | 3× | Section 63 | 225.00 |
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The AI assistant answers only questions about the calculator on this page.
Thai overtime is not a single rate. The law defines three separate situations paying very different multiples, from 1.5× up to 3× the hourly wage. A great many employees are underpaid simply because neither they nor their employer identified which situation applied — most often overtime worked on a holiday, which carries the highest rate of all.
This applies to foreign employees working in Thailand exactly as it does to Thai employees. The Labour Protection Act does not distinguish by nationality.
How it works
Start with the hourly wage. For a monthly-paid employee the law divides the monthly salary by 30 to get a daily wage, then divides that by normal working hours per day. Note the divisor is always 30, not the actual number of days in that month. For a daily-paid employee, simply divide the daily wage by the hours worked.
Situation 1 — overtime on a normal working day, 1.5×. Under Section 61, this is working beyond normal hours on a day you were already scheduled to work. If you normally finish at 5pm and stay until 8pm, those three hours are paid at 1.5×.
Situation 2 — working on a holiday. Under Section 62 this splits by pay type. A monthly-paid employee already receives their wage for the holiday, so the law requires one additional multiple. A daily-paid employee receives nothing for a holiday they do not work, so the law requires two. The end result for both is broadly similar; only the counting differs.
Situation 3 — overtime on a holiday, 3×. Under Section 63, the highest rate. This is coming in on a holiday and then working beyond normal hours on top. Say you work a Sunday from 9am to 8pm with normal hours of 8: the first 8 hours fall under situation 2, and the remaining 3 hours are paid at 3× under this one.
Limits the law imposes. Overtime requires the employee’s consent — an employer cannot compel it, except for certain categories of work the law specifies. Overtime hours combined with holiday working hours must not exceed 36 hours per week.
Some roles are excluded from overtime. Employees with authority to hire, reduce wages or dismiss on the employer’s behalf, along with certain transport roles, have no overtime entitlement — though they do still receive holiday working pay.
Frequently asked questions
On an 18,000 baht salary, what is my overtime rate?
18,000 ÷ 30 gives a daily wage of 600 baht. Divided by 8 hours, the hourly wage is 75 baht. Overtime on a normal working day is therefore 112.50 baht an hour, and overtime on a holiday is 225 baht an hour.
Why divide by 30 when the month has 31 days?
Because the law sets 30 as the standard divisor for monthly-paid employees regardless of the actual length of the month. Using a fixed number keeps the hourly wage constant rather than fluctuating with the calendar.
Does this apply to foreign employees?
Yes. The Labour Protection Act covers employees working in Thailand regardless of nationality, so the same overtime rates and the same 36-hour weekly limit apply. If your contract states a rate below the statutory minimum, the statutory rate prevails — a contract cannot reduce an entitlement the law grants.
Can my employer require me to work overtime?
As a general rule, no. Overtime requires the employee’s prior consent, with exceptions for work of a continuous nature that would suffer if interrupted, and for emergencies. Overtime combined with holiday working must also stay within 36 hours per week.
What if I have been underpaid?
Gather evidence first — time records, payslips, or messages instructing you to stay late. Then file a complaint with a labour inspector at the Labour Protection and Welfare Office for your area. It costs nothing and you do not need a lawyer.
Sources
Rates last verified 25 Aug 2026