Corporate Tax Calculator
Estimate Thai corporate income tax at the standard rate or the progressive SME brackets.
Estimated corporate tax
฿105,000
Bracket-by-bracket breakdown
| ฿0 – ฿300,000 @ 0% | ฿0 |
| ฿300,000 – ฿3,000,000 @ 15% | ฿105,000 |
| ฿3,000,000+ @ 20% | ฿0 |
| Total | ฿105,000 |
How this is calculated
Non-SME companies pay a flat 20% on net profit. Qualifying SMEs instead pay progressive rates: 0% on the first 300,000 THB, 15% on the next tier up to 3,000,000 THB, and 20% above that — similar in shape to personal income tax brackets.
Frequently asked questions
What counts as net profit here?
Net profit for corporate tax purposes is calculated after allowable deductions under the Revenue Code, which can differ meaningfully from accounting profit. This tool takes whatever figure you enter as the taxable base.
Why is the standard rate 20%?
That's Thailand's standard corporate income tax rate for companies that don't qualify for the reduced SME brackets.