CalcThai
calcthai.com · Freelance Rate Calculator
Money & tax
Freelance Rate Calculator
Set an hourly and daily freelance rate from your target income, business costs, insurance and savings, a tax reserve and realistic billable hours, and see cash received after 3% withholding tax.
Ask about this page
The AI assistant answers only questions about the calculator on this page.
Set an hourly and daily freelance rate from your target income, business costs, insurance and savings, a tax reserve and realistic billable hours, and see cash received after 3% withholding tax.
How it works
Monthly invoices = (target take-home + business costs + insurance and savings) ÷ (1 − tax reserve). Hourly rate = invoices ÷ billable hours; day rate = hourly × hours per day. When a juristic-person client withholds 3% on service fees, cash received = invoices × 97%; the withheld amount is credited in your annual return.
Example: a THB 40,000 take-home target plus THB 5,000 costs and THB 3,000 insurance and savings is THB 48,000. With a 5% tax reserve you need THB 50,526.32 of invoices. Over 100 billable hours that is THB 505.26 an hour or THB 4,042.11 a day. After 3% withholding you receive THB 49,010.53.
The tax reserve is an estimate; actual tax is annual and depends on income type, deductible expenses and allowances. Withholding tax is a prepayment, not an extra cost. VAT is excluded if you are VAT-registered. Billable hours are usually fewer than hours worked.
Frequently asked questions
How many billable hours should I enter?
Count only hours clients pay for, excluding finding work, sales calls, unpaid revisions and admin. Many freelancers bill about half to two-thirds of their working time.
Do I still file tax after 3% withholding?
Yes, file your annual return as usual. Withheld tax is credited; any excess can be refunded and any shortfall must be paid.
Why include insurance and savings?
Freelancers have no employer paying into social security or a provident fund, so rates must cover these benefits.
Sources
Rates last verified 25 Aug 2026