Deductible expenses are personal expenses that may be deducted to calculate the Thai personal income tax depending on the category of assessable income of a taxpayer as follows:

• For the income under the categories of assessable income (1), (2) and for copyright under (3), a deduction of 40% is allowed subject to a maximum of Baht 60,000.
• For the income under the category of assessable income (3), other than for copyright and under (4), no deductions are allowed.
• For the income under the category of assessable income (5), the rates of deduction vary from 10% to 30% depending on the type of rented property.
• For the income under the categories of assessable income (6), (7) and (8), the rates of deduction vary from 30% to 85% depending on the type of income or type of business.

Moreover, the deduction of expenses in relation to assessable income under categories (5) – (8) may be made on an actual basis only if satisfactory evidence of the expenditure can be provided to the tax authorities.

Consult MSNA for Thai personal income tax computation.