Thailand inheritance and estate tax: 10 percent only above a high threshold
Thailand receives 88 out of 100 points for inheritance and estate tax. The result is better than in high-tax jurisdictions, but not perfect, because Thailand has a formal inheritance tax with a top rate.
For estate planning, the central number is the high exemption threshold. Thailand's Revenue Department refers to THB 100 million per deceased person after deducting debts. Using the Bank of Thailand reference rate for 15 July 2026, that is about $2.98 million. In principle, only the amount above that threshold is taxed.
What the measured value means
The measured value is 10 %. It represents Thailand's top inheritance tax rate on taxable inheritances above the threshold. The Revenue Department lists a reduced 5% rate for ascendants and descendants, while other taxable recipients can face 10%.
The practical effect therefore depends more on estate size and family relationship than on the headline rate alone. An estate below the threshold can have a very different tax outcome from a large Thai real-estate or business estate.
Thresholds, rates and example calculation
The main figures should be read in U.S. dollars first, with official source amounts in THB. This article uses the Bank of Thailand rate of THB 33.5520 per USD 1 for 15 July 2026.
- Exemption threshold: about $2.98 million; official amount THB 100 million per deceased person after debts.
- Top rate: 10% on the taxable amount above the threshold.
- Reduced family rate: 5% for ascendants and descendants.
- Example for another heir: about $1.49 million of taxable excess, official amount THB 50 million, produces about $149,000 of tax at 10%.
- Example for a direct descendant: the same excess produces about $74,500 of tax at 5%.
This calculation is why Thailand is not treated like a zero-inheritance-tax country. The threshold is high, but large estates can still create a real tax liability.
The rate is therefore best read as a high-net-worth rule. For ordinary household assets, the exemption dominates. For large estates, the key work is tracing which assets are Thai-situs, who receives them and whether the recipient falls into the 5% or 10% group.
Who can fall within the rules
According to the Revenue Department, the scope depends on the recipient, the deceased person, residence and the type of property. Thai individuals and foreign individuals resident in Thailand can be covered more broadly; non-resident foreign recipients are especially relevant when Thai-situs property is inherited.
For foreigners, the distinction between worldwide property, Thai property, real estate, company shares and bank deposits is critical. Anyone holding Thai real estate, equity or larger accounts should not plan succession only from the home-country perspective.
Filing risks and surcharges
The Revenue Department also lists penalties. Late filing can trigger a penalty equal to one time the tax due. An incomplete or false filing can trigger a penalty equal to 0.5 times the underpaid tax. A monthly surcharge of 1.5% can also apply, capped at the amount of tax due.
That makes the tax operationally important for very large estates, even though the threshold is high. Mixed-nationality families, foreign wills and assets in several countries should review the Thai reporting logic early.
What this indicator does not measure
The indicator does not replace estate planning. It does not decide whether a will is valid, which succession law applies, whether double taxation arises, how gifts are treated or whether a special exemption applies in a specific case.
It also does not measure ongoing income tax, capital gains tax, land tax or stamp duty in Thailand. For wealthier movers, inheritance tax is only one part of the tax picture.
Frequently Asked Questions
Is every inheritance taxable in Thailand?
No. The Revenue Department refers to a THB 100 million threshold per deceased person after debts, about $2.98 million. The excess above that threshold is the relevant starting point.
What is Thailand's inheritance tax rate?
The top rate is 10% on the taxable portion. The Revenue Department lists a reduced 5% rate for ascendants and descendants.
Why is Thailand still relatively attractive despite the tax?
The exemption threshold is very high. Many small and medium estates do not reach it, but large estates with a Thai connection need to plan for the tax seriously.
Should foreign heirs check the Thai rules?
Yes, especially where Thai property, residence or a Thai connection of the deceased person or recipient exists. The exact scope is case-specific.
Related indicators
- 💳 Effective Income Tax Rate in Thailand
- 💰 Top Personal Income Tax Rate in Thailand
- 🛡️ Social Security Contributions in Thailand
- 🧾 VAT / GST / Sales Tax Rate in Thailand
- 📊 Capital Gains Tax Rate in Thailand
Sources
- Thai Revenue Department - scope, threshold and taxable inheritances
- Thai Revenue Department - rates, exemption, calculation and penalties
- Bank of Thailand - USD/THB reference rate for 15 July 2026
This article was created on July 17, 2026
