Specific Business Tax in Thailand: 7 Transaction Costs Every Investor Must Know (2026)

Selling a property in Thailand within five years of purchase triggers a 3.3% Specific Business Tax (SBT) on the registered or transacted value, whichever is higher. For international investors, this charge often comes as a surprise - and when combined with the remaining six transaction costs, it can meaningfully erode projected returns on a Bangkok condominium or Phuket villa. Understanding the full cost structure before signing a purchase agreement is not optional; it is fundamental to accurate yield modelling.

Thailand and Cambodia apply distinct fiscal frameworks to foreign property buyers. Thailand has maintained a double taxation agreement (DTA) with numerous countries since the 1980s, while Cambodia has no such network, making cross-border tax planning more complex for investors resident in treaty-partner countries.

Quick answer

• Specific Business Tax (SBT) in Thailand equals 3.0% base tax + 0.3% local surcharge = 3.3% of the registered or transacted value (whichever is higher), applied when a property is sold within less than 5 years of acquisition
• Properties held for more than 5 years are exempt from SBT; instead, a stamp duty of 0.5% applies
• Transfer fee is set at 2% of the registered value and is typically split equally between buyer and seller
• Withholding tax (WHT) for individual sellers is calculated on a progressive scale (0-35%) based on the registered price and the number of years the property was held
• In Cambodia, the property transfer tax is 4% of market value, paid by the buyer
• Rental income in Thailand is taxed progressively at 0-35%; in Cambodia the rate is 10% of gross income for non-residents
• International investors must account for their home-country tax obligations on worldwide income, applying any applicable DTA provisions to avoid double taxation

Options and scenarios

Scenario 1: Buying a new condominium in Bangkok at THB 5,000,000

A foreign investor acquires a freehold unit in a building where aggregate foreign ownership does not exceed 49% - the legal threshold under Thai condominium law. The property is purchased directly from the developer.

Typical buyer-side costs:

• Transfer fee: commonly negotiated so the developer covers 1% and the buyer covers 1%, amounting to THB 50,000
• Land Office registration fee: a few hundred THB
• Sinking fund contribution: one-time payment, project-specific

Developer-side costs:

• SBT at 3.3%: THB 165,000 (developers sell in the course of business, so SBT is mandatory regardless of holding period)
• Corporate withholding tax: applied under standard corporate rules

Scenario 2: Reselling the same unit after 3 years at THB 6,000,000

The investor sells before the five-year threshold. Seller-side costs include:

• SBT: 3.3% x THB 6,000,000 = THB 198,000 (approximately USD 5,500)
• Withholding tax: calculated by dividing the registered price by the number of years held (3), computing progressive PIT on that figure, then multiplying back by 3 years
• Transfer fee (seller's share): THB 60,000 (half of 2%)

Total seller-side transaction costs in this scenario can reach 5-7% of the sale value, substantially reducing net profit on a short holding period.

Scenario 3: Selling after 6 years

SBT no longer applies. Stamp duty at 0.5% replaces it: THB 30,000 on a THB 6,000,000 transaction. The saving relative to Scenario 2 exceeds THB 160,000 on SBT alone. This mathematics is why experienced investors in Thailand typically target a minimum five-year holding period, favouring a buy-and-hold strategy over short-term flipping.

Scenario 4: Purchasing a condominium in Phnom Penh, Cambodia at USD 80,000

Cambodia permits foreigners to own units from the first floor upward under the co-titled (strata title) system, subject to a 70% cap on foreign ownership per building.

• Property transfer tax: 4% x USD 80,000 = USD 3,200 (paid by the buyer)
• Annual property tax: 0.1% on value exceeding approximately USD 25,000 - at this price point, annual liability is typically a few tens of dollars
• Rental income tax: 10% of gross income for non-residents; 14% tax on profit for registered corporate entities

Comparison table

Parameter	Thailand - sale under 5 years	Thailand - sale over 5 years	Cambodia
Transfer fee	2% (typically split 50/50)	2% (typically split 50/50)	4% (paid by buyer)
Specific Business Tax	3.3% (paid by seller)	Not applicable	Does not exist
Stamp duty	Not applicable (SBT takes precedence)	0.5% (paid by seller)	0.1% at registration
Withholding tax	Progressive 0-35% (seller)	Progressive 0-35% (seller)	4% of sale price (seller)
Rental income tax	Progressive 0-35% personal income tax	Progressive 0-35% personal income tax	10% of gross (non-resident)
Annual property tax	0.02-0.3% Land and Building Tax	0.02-0.3% Land and Building Tax	0.1% above threshold
Double taxation treaty network	Yes (broad network)	Yes (broad network)	Limited / none with many countries

Risks and mistakes

1. Underestimating SBT on short-term flips. Investors projecting a 15-20% gross margin on a three-year flip often omit the 3.3% SBT. When added to withholding tax and the seller's share of the transfer fee, total transaction costs can absorb a substantial portion of the gain. Net return calculations must include all exit costs from day one.

2. Confusing registered value with market price. The Thai Land Office uses the appraised value or the contractual transaction price, whichever is higher, as the tax base. Understating the sale price in the contract to reduce tax liability is illegal and can result in the Land Office refusing to process the title transfer.

3. Overlooking Cambodia's withholding tax on disposals. In Cambodia, a 4% withholding tax on the gross sale price is collected automatically at the point of transfer, in addition to the 4% property transfer tax paid by the buyer. Sellers effectively face an 8% combined transfer cost on a Cambodia exit, which must be factored into return models.

4. Neglecting annual holding costs. Thailand's Land and Building Tax, introduced in 2020, levies 0.02%-0.1% annually on residential properties and up to 0.3% or more on commercial properties and vacant land. These recurring costs reduce net rental yield over a multi-year holding period.

5. Missing home-country tax filing obligations. Investors resident in countries with worldwide income taxation must declare foreign rental income and capital gains in their home jurisdiction. Applicable DTA provisions determine how foreign taxes paid can be credited or deducted. Failure to file correctly can result in double taxation or penalties.

6. Skipping specialist legal and tax advice. A transaction spanning two jurisdictions requires professionals who understand both Thai or Cambodian property law and the investor's home-country tax code. The cost of proper advice is modest relative to the potential liability from errors.

FAQ

What exactly is the Specific Business Tax in Thailand?

The Specific Business Tax (SBT) is a charge of 3.3% (3.0% base rate plus 0.3% local surcharge) levied on the sale of property held for fewer than five years. It is paid by the seller and replaces stamp duty when it applies. The tax base is the higher of the Land Office appraised value or the actual transaction price.

Who pays the transfer fee when buying property in Thailand?

Thai law does not prescribe who must pay, so it is a matter of negotiation. Market convention is a 50/50 split between buyer and seller, meaning each party covers 1% of the registered value. When purchasing from a developer, the allocation may differ and is always worth negotiating explicitly before signing.

How is withholding tax calculated for individual sellers in Thailand?

The Land Office divides the registered sale price by the number of years the seller held the property. The resulting annual figure is taxed at the progressive personal income tax rate (0-35%). That tax amount is then multiplied by the number of years held to arrive at the total withholding tax. The Land Office performs the calculation at the time of registration.

How can sellers legally avoid Specific Business Tax in Thailand?

The only lawful route is to hold the property for more than five years from the registration date. After that threshold, stamp duty of 0.5% applies instead of SBT at 3.3%, producing a saving of 2.8 percentage points on the sale value. Transfers to direct lineal descendants also qualify for an exemption under certain conditions.

What is the property transfer tax in Cambodia and who pays it?

Cambodia charges a 4% property transfer tax on the market value of the asset. This is paid by the buyer at the time of title registration. Sellers are additionally subject to a 4% withholding tax on the gross sale price, making the combined transfer friction on both sides significant.

What is the annual property tax in Cambodia?

Annual property tax in Cambodia is 0.1% of the assessed value exceeding approximately USD 25,000 (100,000,000 KHR). For lower-value properties, the tax may not apply at all. The liability is relatively modest compared to the upfront transfer costs.

How is rental income taxed in Thailand for foreign investors?

Rental income in Thailand is subject to personal income tax on a progressive scale from 0% to 35%, depending on total annual income. Non-residents earning Thai-source income are liable for Thai withholding on rental proceeds. Investors should verify whether a DTA between Thailand and their country of residence allows a credit for Thai taxes paid.

Can foreigners own land in Cambodia?

No. Foreign nationals cannot hold direct freehold title to land in Cambodia. They may own condominium units from the first floor upward under the strata title system, provided that aggregate foreign ownership within a single building does not exceed 70%.

What are the total seller-side costs when selling a Thai property held for less than 5 years?

Total seller-side costs typically fall in the range of 5-7% of the transaction value, comprising SBT at 3.3%, progressive withholding tax, and the seller's half of the 2% transfer fee (approximately 1%). Exact figures depend on the registered price, years held, and the seller's income bracket.

Does Cambodia tax rental income for non-resident investors?

Yes. Non-resident investors receiving rental income in Cambodia are subject to a 10% tax on gross rental receipts under the withholding tax mechanism. Corporate entities registered in Cambodia pay a 14% tax on net profit. Investors should consult a local tax adviser to confirm the applicable regime for their specific ownership structure.

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