Tax planning tool

2026 tax calculator Detailed, every field editable

Enter all your income and deductions. Each allowance cap is applied automatically, and you will see which products to add and how much more tax you can save, in time for 31 December 2026.

Calculating tax with a calculator
Tax 2026
Net taxable income–
Tax for the year–
Top marginal rate–
Effective tax rate–
Free
Would you like this tax calculation as a PDF?Prepared by June from the numbers you entered, with advice on deductions to lower your tax, at no cost
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Calculated using the tax rates and deduction caps for 2026 income, filed by 31 Mar 2027. This is an estimate for planning; actual figures follow forms P.N.D. 90/91 and Revenue Department notifications. More information at rd.go.th