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In Thailand, stamp duty is a tax on certain documents (“instruments”), including many private loan agreements. It’s often skipped in informal loans, but it can matter if you ever need to enforce the loan in a Thai court.
Stamp duties are taxed on instruments and not on transactions or persons. The tax placed on legal document for the attaching or impressing of official stamps, usually in the transfer of assets or property (Source: Thailand revenue department).
Chapter 6
Section 103 In this Chapter, unless the context otherwise requires:
Specific business tax (SBT) is imposed on certain types of businesses whose value added is difficult to define such as banking, finance, credit foncier, life insurance, pawnshops, and real estate. Such businesses are considered to be outside the VAT system and therefore are not subject to VAT (source: the Thailand Revenue Department).
Chapter 5
Section 91 Specific business tax is an assessment tax.
Value Added Tax (VAT) has been implemented in Thailand since 1992 replacing Business Tax (BT). The VAT is currently imposed at a rate of 7%, with a few exceptions, such as small entrepreneur whose annual turnover is less than 1.8 million baht. A company must register for Value Added Tax if it is expected that its gross income will exceed 1.8 million baht per annum or within 30 days of the date they reach 1,8 million baht in sales (check for possible changes). Companies registered for VAT must file VAT returns and pay tax (if any) to the local district office monthly, within 15 days from the end of the month which the VAT is to be accounted for (source Thailand revenue department).
Businesses with an annual turnover of less than 1.8 million Thai Baht are exempt from mandatory VAT registration.
Source: Thai Revenue Department regulations
Chapter 4
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Part 1
Section 77 Value added tax is an assessment tax.
Tax benefits for SME's, the general corporate tax rate on the net profit in Thailand is 20%. The government has reduced corporate income tax rates to promote specific business sectors and small and medium enterprises. Enterprises qualify as small and medium-sized enterprises (SMEs) if the paid up share capital does not exceed 5 million baht. The tax rate for companies with a paid up share capital not more than 5 Million Thai Baht at the end of its tax year shall be taxed over the net profit as shown in the table below.
As of 2025, small and medium-sized enterprises (SMEs) in Thailand benefit from reduced progressive tax rates:
| Net Profit (THB) | Tax Rate |
|---|---|
| Up to 300,000 | 0% |
| 300,001 – 3,000,000 | 15% |
| Above 3,000,000 | 20% |
Applicable only to companies with paid-up capital not exceeding 5 million THB and annual revenue not exceeding 30 million THB.
Part III
Section 65 Taxable income under this Part is net profit which is calculated by deducting income from business or income arising from business carried on in an accounting period with expenses in accordance with conditions prescribed in Section 65 Bis and Section 65 Ter. An accounting period shall be twelve months except in the following cases where it may be less than twelve months: