Corporate Income Tax Calculator
The Corporate Income 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 corporate income tax figures and recalculate after changing an assumption. Treat it as a planning estimate and independently verify the current rule or provider terms.
[year 2026 — steps of the stairs 15-37%]
Corporate Tax Calculation by Progressive Ladder (15%, 20%, 30%, 37%)
Calculation results
Corporate tax rate year 2026
| Net income 0-500,000 baht | 15% |
| Net income 500,001-1,000,000 baht | 20% |
| Net income 1,000,001-4,000,000 baht | 30% |
| Net income 4,000,000 baht and above | 37% |
How do you calculate?
- Net income = total income - deductible expenses
- Bring net income to the ladder (each part of income uses a different rate)
- Total tax = sum of each step
What is a deductible expense?
- Salary, wages, compensation.
- Hire, contract.
- Deductible VAT.
- Depreciation of equipment/asset.
- Interest on the loan works.
- Group insurance, retirement benefits.
English calculator guide
How to use the Corporate Income Tax Calculator
Use this page to test a specific corporate income 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 corporate income tax estimate instead of relying on a generic example.
- Build a baseline corporate income tax case with figures that match your situation.
- Run a second corporate income tax case after changing the rate, period, quantity or other key assumption.
- Record the difference between the two corporate income tax results and the input responsible for it.
Inputs for the corporate income tax estimate
For this corporate income 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 corporate income tax result is calculated
The calculator applies the displayed statutory rates, thresholds and allowances to the figures you enter. Reusing the same corporate income tax inputs will produce the same estimate, which makes the page suitable for controlled scenario comparisons.
Checks for a corporate income tax decision
Check the effective date and confirm current rules with the relevant Thai authority or a qualified adviser. For corporate income tax, Use the result as a commercial planning estimate. Confirm supplier prices, payment-provider fees, taxes, minimum charges and contract terms before setting a price or budget. 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