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Tax rate for the year 2026 (Revenue Department)
Monthly Withholding Tax Calculator
The Monthly Withholding Tax Calculator estimates an income, tax or statutory-cost estimate for the figures entered from the income, employment or business status, relevant period, allowances and current thresholds shown on the page. Replace the example values with your own monthly withholding tax figures and recalculate after changing an assumption. Treat it as a planning estimate and independently verify the current rule or provider terms.
Calculate monthly withholding tax for full-time employees and freelancers. According to the rates and methods of the Revenue Department. Free to use. No membership required.
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Results of calculation of withholding tax
What is withholding tax? And how is it calculated?
Withholding Tax is a system in which the Revenue Department requires employers or payers to deduct taxes from income before paying it to recipients. To collect taxes throughout the year instead of collecting them just once
Calculation method for full-time employees (40(1))
- Calculate income for the whole year (Monthly income × 12)
- Deduct expenses 50% from income but not more than 100,000 baht.
- All deductibles (personal, spouse, children, insurance, etc.)
- Calculate tax on net income based on stepped rates.
- Divided by 12 months = withholding tax per month
Withholding rates by type of income
| Income type | Deduction rate |
|---|---|
| 40(1) Salary / Wages | By steps (5–35%) |
| 40(2) Service wages / Freelance | 3% |
| 40(3) Royalties / Copyright | 3% |
| 40(5) rental fee | 5% |
| 40(6) independent profession | 3% |
Formula used for calculation
Withholding tax = Income × Deduction rate − Monthly deduction
Withholding tax is a tax that an employer deducts from an employee's salary every month. According to the annual income processing and deduction formula set by the Revenue Department. for employees The deduction rate is usually between 5–20% of income after deducting deductions
Calculation example
Example at 1: Salary employee 40,000 baht/month (single)
- Monthly income = 40,000 baht
- Estimated annual income = 40,000 × 12 = 480,000 baht
- Monthly personal allowance = 60,000 ÷ 12 = 5,000 baht
- Estimated monthly net income = 40,000 − 5,000 = 35,000 baht
- Monthly estimated tax deduction ≈ (480,000 − 60,000) × 5% ÷ 12 = 1,750 baht/month
Example at 2: Salary employee 50,000 baht/month (married with 1 children)
- Estimated annual income = 50,000 × 12 = 600,000 baht
- Deduction for the whole year = 60,000 (personal) + 60,000 (spouse) + 30,000 (child 1) = 150,000 baht
- Estimated net income per year = 600,000 − 150,000 = 450,000 baht
- Monthly estimated tax deduction = (450,000 − 150,000) × 0% ÷ 12 = 0 baht/month (No need to deduct)
summarize
People with different salaries Different taxes may be deducted. Depends on the amount of deductions you are entitled to receive. The employer should calculate correctly according to the documents. P. N. D.3 and P. N. D.2 since the beginning
refer: Revenue Department: Withholding standards, year 2026 [Update 2026]
Frequently asked questions
What is withholding tax?
What is the withholding tax rate for salary?
How much withholding tax are withheld from freelancers?
What can the monthly withholding tax be used for?
How much is withholding tax on other types of income?
Learn more from our article.
English calculator guide
How to use the Monthly Withholding Tax Calculator
Use this page to test a specific monthly withholding tax scenario. Enter your own values in the calculator above, review the units beside each field, and recalculate after changing an assumption. The result updates the monthly withholding tax estimate instead of relying on a generic example.
- Build a baseline monthly withholding tax case with figures that match your situation.
- Run a second monthly withholding tax case after changing the rate, period, quantity or other key assumption.
- Record the difference between the two monthly withholding tax results and the input responsible for it.
Inputs for the monthly withholding tax estimate
For this monthly withholding tax calculation, check the income, employment or business status, relevant period, allowances and current thresholds shown on the page. The result is designed to show an income, tax or statutory-cost estimate for the figures entered, not a guaranteed provider price or official decision.
How the monthly withholding tax result is calculated
The calculator applies the displayed statutory rates, thresholds and allowances to the figures you enter. Reusing the same monthly withholding tax inputs will produce the same estimate, which makes the page suitable for controlled scenario comparisons.
Checks for a monthly withholding tax decision
Check the effective date and confirm current rules with the relevant Thai authority or a qualified adviser. For monthly withholding tax, Treat the result as an estimate for planning. Tax rules, eligibility and deduction limits can depend on the tax year and your evidence, so compare the result with current Revenue Department guidance or a qualified adviser. Because this calculation can affect an important financial, legal or health decision, independently verify the inputs and current rules before relying on the result.
- Language QA
- Terminology, numeric values and calculator controls checked
- Calculator scope
- Tax and statutory rate
- Last English review
- 26 July 2026