Rental Tax on Thailand Property: 7 Steps for International Investors in 2026

An investor renting out a condominium in Bangkok faces taxation in two jurisdictions simultaneously. This is not a procedural quirk - it is a direct consequence of the absence of a bilateral Double Tax Treaty (DTT) between Thailand and most European countries, including Poland. In 2026, this gap costs investors between 3 and 12 percentage points of additional tax burden if the ownership structure is not planned carefully before purchase.

Rental income from Thai property is taxable both in Thailand (as the source country) and in the investor's country of tax residence. Thailand collects either a withholding tax at source or requires annual self-assessment from non-residents. Most European tax authorities simultaneously require residents to declare global income. Without a DTT, the only available relief mechanism is a proportional foreign tax credit - meaning tax paid in Thailand can offset (but not eliminate) the liability at home, subject to strict limits.

Below is a full breakdown of the process: from signing a lease agreement in Thailand to filing the corresponding tax return in your home country.

Quick answer

• Thailand has no Double Tax Treaty with Poland or most EU countries - rental income is taxable in both jurisdictions
• Thailand withholds 15% WHT on rental payments made by corporate tenants or property management companies to non-resident landlords
• When the tenant is an individual, no WHT is deducted automatically - the landlord must self-assess under Thailand's progressive income tax scale of 5-35%
• Tax paid in Thailand can be credited against home-country liability using the proportional foreign tax credit method
• Transaction costs at purchase in Thailand total approximately 1.1-6.3% of the assessed value, depending on the seller's holding period
• Cambodia follows a similar framework: 14% WHT on rental income, no DTT with European countries, and a 4% transfer tax paid by the buyer

Options and scenarios

Scenario 1: Bangkok condominium rented at 30,000 THB per month

Assume a purchase price of 3,000,000 THB (approximately 85,000 USD) and monthly rent of 30,000 THB (approximately 850 USD). Annual gross rental income: 360,000 THB (approximately 10,200 USD).

Thai tax side:

• If the tenant is a company or a management agent, they will withhold 15% WHT at each payment - approximately 54,000 THB per year (around 1,530 USD)
• If the tenant is a private individual, no WHT is deducted; the landlord should file an annual return with the Thai Revenue Department under the progressive scale, though many non-residents omit this step - a compliance risk

Home country tax (flat-rate equivalent at approximately 8.5%):

• Annual rental income: approximately 10,200 USD
• Flat-rate tax at 8.5%: approximately 867 USD
• Foreign tax credit (proportional): up to 867 USD, limited to the domestic tax due on that income
• With 15% WHT paid in Thailand (approx. 1,530 USD), the credit fully offsets the home-country liability - net additional payment: 0 USD

Home country tax (progressive scale at 12%):

• Taxable income after deductions (management fees, depreciation): approximately 7,000 USD
• Tax at 12%: approximately 840 USD
• Thai WHT credit: covers the full amount
• Net additional payment: likely 0 USD, subject to the investor's total income base

Scenario 2: Phuket villa rented at 80,000 THB per month

Purchase price 12,000,000 THB, annual rent 960,000 THB (approximately 27,200 USD).

Thai tax side:

• WHT at 15%: 144,000 THB (approximately 4,080 USD)
• Alternatively, progressive self-assessment at 5-35% if no agent withholds

Home country tax (flat rate):

• On income up to approximately 28,000 USD: 8.5% = approximately 2,380 USD
• On income above that threshold: 12.5%
• Thai WHT credit (4,080 USD) exceeds the flat-rate liability - net additional payment: 0 USD

Scenario 3: Cambodia for comparison

Cambodia presents an identical treaty situation. The WHT rate on rental income for non-residents is 14%. The annual property tax is 0.1% of value exceeding approximately 25,000 USD. The foreign tax credit mechanism available in most European tax systems applies the same way as for Thailand. For investors comparing both markets, Cambodia's lower WHT rate is partially offset by a higher transfer tax at acquisition.

Comparison table

Parameter	Thailand	Cambodia	Home country (EU resident)
WHT on rental income (non-resident)	15%	14%	n/a
Personal income tax scale	5-35%	0-20% (residents)	Varies by country (typically 12-45%)
Transfer fee at purchase	2% of assessed value	4% of market value	n/a
Specific Business Tax (SBT)	3.3% (if held under 5 years)	Not applicable	n/a
Stamp duty	0.5% (if SBT not applicable)	Not applicable separately	n/a
Annual property tax	0.02-0.3% (Land and Building Tax)	0.1% above threshold	n/a
Double Tax Treaty with EU	None	None	n/a
Double taxation relief method	Proportional foreign tax credit	Proportional foreign tax credit	n/a
Who pays transfer fee	Negotiated - typically 50/50	Buyer pays	n/a

Risks and mistakes

1. Assuming that Thai WHT settles the global tax obligation. This is the most common error. Tax residents of most countries must declare worldwide income regardless of whether a higher tax was paid abroad. Failure to file the relevant return with a foreign income schedule can result in significant penalties under local tax law.

2. Failing to obtain official WHT documentation. To claim a foreign tax credit, tax authorities require proof of tax paid abroad. In Thailand, the relevant document is Form Por. Ngor. Dor. 3 - a withholding tax certificate issued by the payer. Without it, the credit may be disallowed during an audit.

3. Confusing gross income with net income when choosing the tax method. Flat-rate taxation applies to gross rental receipts with no deductions. Progressive taxation allows deduction of operating costs - property management fees, repairs, depreciation. When costs are high, the progressive scale can be more efficient despite its higher headline rate.

4. Ignoring exchange rate fluctuations. Rental income in Thai Baht (THB) must be converted to the investor's home currency for tax purposes, typically using the central bank's average rate on the business day preceding each receipt. THB/EUR or THB/USD fluctuations can shift the effective tax burden by several percentage points over a full year.

5. Overlooking the Thai annual filing requirement. Even when WHT has been deducted at source, the Thai Revenue Department may expect a non-resident landlord to file an annual return (Form PND.90 or PND.91). Non-residents whose only Thai income has been fully withheld at source are technically exempt from filing, but interpretation varies. Always confirm with a licensed Thai tax adviser.

6. Underestimating hidden transaction costs. In Thailand, the allocation of transfer fees between buyer and seller is a matter of contract negotiation, not statutory obligation. On new-build units, developers often absorb the transfer fee and Specific Business Tax - but price these into the unit cost. Review every clause of the sale and purchase agreement before signing.

FAQ

Does Thailand have a Double Tax Treaty with European countries?

Thailand has DTTs with a number of countries, but not with Poland or several other EU member states. Investors should verify the specific treaty status for their country of tax residence before structuring any investment. Where no DTT exists, the only available relief is a unilateral foreign tax credit under domestic law.

What is the rental income tax rate in Thailand for foreigners?

When the tenant is a company or a property management firm, they are required to withhold 15% WHT from each rental payment made to a non-resident landlord. When the tenant is a private individual, no automatic withholding applies and the landlord must self-assess under Thailand's progressive income tax scale of 5% to 35%.

How do I report Thai rental income on my home-country tax return?

You must declare Thai rental income in your annual tax return (the specific form depends on your country of residence) and attach a foreign income schedule. The proportional tax credit method allows you to offset tax paid in Thailand against your domestic liability, up to the amount of domestic tax attributable to that income. You will need the Thai WHT certificate (Form Por. Ngor. Dor. 3) or an official receipt from the Revenue Department as supporting documentation.

Is a flat-rate or progressive tax method better for Thai rental income?

A flat-rate approach (where available) is simpler and generally more efficient when operating costs are low. The progressive scale becomes more advantageous when documented costs - such as management fees, maintenance, and depreciation - are substantial, since these reduce the taxable base and can significantly lower the effective rate despite the higher nominal rates.

Who pays the transfer fee when buying property in Thailand?

Thai law does not prescribe who bears the transfer fee. By market convention it is split equally between buyer and seller, but this is always negotiable. On new-build developments, the developer frequently covers the transfer fee and Specific Business Tax, though these costs are typically factored into the unit price.

What is the annual property tax in Thailand?

The Land and Building Tax, introduced in 2020, applies to residential property at rates between 0.02% and 0.1% of the official assessed value. Commercial properties and undeveloped land may be taxed at up to 0.3%. In practice, the annual liability on a typical condominium unit is modest relative to rental yields.

What are the purchase costs when buying property in Cambodia?

The transfer tax in Cambodia is 4% of the market value of the property and is paid by the buyer. In addition, an annual property tax of 0.1% applies to property value exceeding approximately 25,000 USD (100,000,000 KHR). There is no Specific Business Tax equivalent, and stamp duty is not levied separately.

Do I need to report a foreign property purchase to my domestic tax authority?

The acquisition itself typically does not require a separate notification, but income generated from the property - rental income or capital gains on sale - must be declared annually. In some jurisdictions, foreign assets above certain thresholds must also be reported as part of broader foreign asset or financial account disclosure requirements. Confirm the rules applicable in your country of residence.

How do I convert THB rental income to my home currency for tax purposes?

Use the official central bank average exchange rate for the business day preceding each income receipt. For monthly rental payments this means 12 separate conversions per year. Keep a record of the applicable rates and the corresponding payment dates, as tax authorities may request this documentation.

What is the Specific Business Tax in Thailand and when does it apply?

The Specific Business Tax (SBT) is levied at 3.3% of the higher of the assessed value or the sale price when a property is sold within 5 years of acquisition. If the seller has held the property for more than 5 years, SBT does not apply and stamp duty of 0.5% is charged instead. On the secondary market, the allocation of SBT between parties is subject to negotiation.

---

Transaction cost checklist for buying and renting property in Thailand:

• Transfer fee: 2% of assessed value (typically split 50/50)
• Specific Business Tax: 3.3% (if seller has held the property under 5 years)
• Stamp duty: 0.5% (charged when SBT does not apply)
• Seller WHT: 1% of assessed value or sale price (whichever is higher)
• Land and Building Tax (annual): 0.02-0.3% of assessed value
• WHT on rental income (withheld by corporate tenant): 15% of rent received
• Legal fees and due diligence: approximately 30,000-80,000 THB depending on complexity

The key recommendation is consistent: before acquiring property in Thailand or Cambodia, engage both a tax adviser specialising in cross-border income in your home country and a licensed adviser in the country of investment. The absence of a Double Tax Treaty means that tax efficiency requires precise advance planning - not assumptions.

---

Ready to invest in Thailand or Cambodia property? Send us a request - our experts will find the best options for you.

Contact us ->