Thailand and Cambodia Property Taxes for International Investors: 7 Key Facts (2026)

Buying a condominium in Bangkok for 5 million THB (approximately 130,000 USD) exposes an international investor to between six and eleven separate fees and taxes across two jurisdictions, two continents, and up to three currencies. The absence of a double taxation treaty between many investors' home countries and Thailand means that the same rental income can be taxed twice. This is not a theoretical risk - it can erode up to 40% of net profit.

For any investor holding tax residency in a country without a double taxation agreement (DTA) with Thailand or Cambodia, understanding the full structure of transaction and ongoing costs is a prerequisite for achieving positive returns. Below is a detailed, number-driven breakdown covering both markets.

Quick answer

• Thailand and Cambodia have no DTA with Poland, and limited DTAs with many other countries. Rental income from Thai or Cambodian property is typically taxable in both the source country and the investor's country of tax residency.
• Transfer fee in Thailand is 2% of the government-appraised value of the property, customarily split 50/50 between buyer and seller.
• Specific Business Tax (SBT) in Thailand is 3.3% (3% plus 10% local surcharge) and applies when the seller has owned the property for fewer than 5 years.
• Withholding tax on sale in Thailand is calculated on a progressive scale from 5% to 35%, depending on the length of ownership and the official appraised value.
• Transfer tax in Cambodia is 4% of property value, paid entirely by the buyer.
• Rental withholding tax in Cambodia is 14% for non-residents.
• Investors must verify their home-country tax obligations for foreign-sourced income regardless of whether tax was paid at source.

Options and scenarios

Scenario 1: Purchasing a Bangkok condominium for 5,000,000 THB

The property is purchased on the secondary market from an individual seller who has owned it for 3 years.

• Transfer fee (2%): 100,000 THB total. By convention, the buyer covers 50,000 THB and the seller covers 50,000 THB, though this is negotiable.
• Specific Business Tax (3.3%): 165,000 THB, borne by the seller (ownership period under 5 years).
• Withholding tax: calculated progressively on the appraised value divided by years of ownership. For a 3-year holding period on a 5,000,000 THB property, the estimated liability for the seller is approximately 100,000 to 150,000 THB.
• Stamp duty (0.5%): not applicable when SBT is charged - the two taxes are mutually exclusive.

For the buyer, the direct transaction cost is approximately 50,000 to 70,000 THB (transfer fee plus minor administrative charges), representing just over 1% of the purchase price.

Scenario 2: Renting the same apartment at 25,000 THB per month

Annual gross rental income: 300,000 THB (approximately 8,000 USD).

In Thailand: Rental income is subject to Thai personal income tax on a progressive scale (5% to 35%). After standard deductions, the effective tax rate at 300,000 THB income typically falls in the 5 to 10% range, resulting in a tax bill of roughly 15,000 to 30,000 THB per year.

In the investor's home country: In the absence of a double taxation treaty, the investor cannot automatically apply an exemption-with-progression or proportional credit method. Most countries require worldwide income to be declared. Tax paid in Thailand may be creditable against domestic tax liability, but only up to the proportional domestic tax due on that foreign income. If Thai tax paid is lower than the home-country equivalent, a top-up will be due.

Scenario 3: Purchasing an apartment in Phnom Penh for 80,000 USD

• Property transfer tax (4%): 3,200 USD, paid by the buyer in full.
• Annual property tax: 0.1% of assessed value above the threshold of approximately 25,000 USD. On an 80,000 USD property, the taxable base is 55,000 USD, yielding an annual tax of roughly 55 USD.
• Rental withholding tax: 14% for non-resident landlords, deducted at source.
• Home-country tax obligations apply in the same way as for Thai properties: foreign income must be declared and the investor may owe additional tax depending on domestic rates and available credits.

Comparison table

Parameter	Thailand	Cambodia	Home Country (typical obligation)
Transfer fee	2% (split by convention)	4% (buyer pays 100%)	None on foreign property
Specific Business Tax	3.3% (seller, ownership under 5 years)	No equivalent	None
Withholding tax on sale	5-35% progressive (seller)	4% capital gains-style tax	Capital gains tax on profit
Stamp duty	0.5% (only when SBT does not apply)	None	Varies by jurisdiction
Rental income tax	5-35% Thai PIT (progressive)	14% WHT for non-residents	Declared as foreign income
Annual property tax	Land and Building Tax up to 0.3%	0.1% above threshold (~25,000 USD)	None on foreign property
DTA with major investor countries	Limited coverage	Very limited coverage	Verify individually
Who pays transfer fee	50/50 by convention	Buyer 100%	Not applicable

Risks and mistakes

1. Failing to declare foreign rental income domestically. Tax authorities in most developed countries participate in the Common Reporting Standard (CRS) automatic exchange of information. Bank accounts in Thailand and Cambodia are reportable. Assuming 'no one will find out' is not a tax strategy - it is a liability.

2. Confusing Stamp Duty with Specific Business Tax in Thailand. These two taxes are mutually exclusive. When SBT applies (ownership under 5 years or seller is a company), stamp duty at 0.5% is not charged. Buyers should confirm which applies before closing, as it affects the seller's net proceeds and indirectly the negotiating position.

3. Underestimating closing costs in Cambodia. The 4% transfer tax is only one component. Notarial fees, translation costs, and registration charges bring total closing costs to 5 to 6% of the purchase price in practice.

4. Lacking Thai tax documentation for home-country filing. To claim a foreign tax credit, investors need a tax payment certificate from the Thai Revenue Department and supporting payment evidence. These documents are available but the process takes time. Plan ahead before filing season.

5. Ignoring currency conversion rules. Foreign income must be converted to the domestic currency for tax filing purposes, using the official exchange rate on the date of receipt. In years of significant THB or KHR fluctuation, the declared income in home-currency terms may diverge meaningfully from actual receipts.

6. Assuming a 50/50 transfer fee split is legally binding in Thailand. It is a market convention, not a legal requirement. It should be explicitly negotiated and confirmed in the sale and purchase agreement.

7. Overlooking Cambodia's evolving capital gains tax framework. Cambodia introduced a capital gains tax framework at 20%, but implementation has been delayed multiple times. Currently, the 4% transfer tax typically governs property sales. Regulations are subject to change - always verify with a local tax adviser before transacting.

FAQ

Does Thailand have a double taxation treaty with most Western countries?

Thailand has signed DTAs with approximately 61 countries, including Germany, France, the UK, and several others. However, coverage is not universal. Investors should verify whether their specific country of tax residency has a DTA with Thailand. Poland, for example, does not have a DTA with Thailand as of 2026.

What is the transfer fee when buying property in Thailand?

The transfer fee is 2% of the government-appraised (cadastral) value of the property. It is conventionally shared equally between buyer and seller, but this split is negotiable and should be confirmed in writing in the purchase contract.

Who pays Specific Business Tax in Thailand?

SBT at 3.3% is paid by the seller. It applies when the seller has owned the property for fewer than 5 years or when the seller is a registered business entity. When SBT applies, stamp duty of 0.5% does not apply.

How is rental income from Cambodia taxed for foreign investors?

Cambodian rental income is subject to a 14% withholding tax for non-residents, deducted at source. Investors must also declare this income in their home country and pay any additional tax due after applying available foreign tax credits.

Do I need to pay tax in my home country on rental income from Bangkok?

In most countries, yes. Tax residents are typically subject to worldwide income taxation. Rental income earned in Thailand must be declared in your home-country tax return. If Thailand and your country have a DTA, relief may be available. Without a DTA, you may owe additional domestic tax after crediting Thai taxes paid.

What is the annual property tax in Cambodia?

The annual immovable property tax in Cambodia is 0.1% of the assessed market value above a threshold of approximately 100 million KHR (roughly 25,000 USD). On a property valued at 80,000 USD, the annual tax is approximately 55 USD.

Can I credit Thai withholding tax against my home-country income tax?

In most jurisdictions, yes - partially. Foreign tax credits are available but capped at the proportional domestic tax due on the foreign income. If Thai tax paid exceeds the domestic equivalent, the excess is generally not refundable. If Thai tax is lower, a top-up may be owed domestically. Specific rules depend on your country's tax code.

What documents do I need from Thailand to file my home-country tax return?

Typically required: a tax payment certificate from the Thai Revenue Department, the rental agreement or sale and purchase agreement, and bank transfer records showing remittance of funds. Documents in Thai require certified translation.

Is there a capital gains tax on property sales in Cambodia?

Cambodia has a capital gains tax framework at 20%, but enforcement and implementation have been repeatedly deferred. In practice, the 4% transfer tax is the dominant cost on property sales in 2026. The regulatory environment continues to evolve - consult a local tax specialist before any sale transaction.

What is the practical total transaction cost when buying in Cambodia?

Buyers should budget 5 to 6% of the purchase price to cover the 4% transfer tax, plus legal fees, notarial costs, translation, and registration charges. For a property priced at 80,000 USD, total closing costs typically fall between 4,000 and 4,800 USD.

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