Inheritance tax is not automatically calculated on the deceased person’s entire estate as one combined amount. The general threshold applies to the net value received by each recipient from each deceased person, including inheritances received on more than one occasion. Check whether the amount exceeds THB 100 million and whether the recipient falls within the statutory rules.
How to review a potential inheritance tax obligation
- List the assets received and keep evidence of their value on the relevant date.
- Gather inherited liabilities and confirm which debts may be deducted under the law.
- Review each recipient separately and separate inheritances from each deceased person.
- Check the tax rate and any exemption that applies to the recipient’s relationship or status.
- Confirm the form, supporting documents, and deadline against the latest law and official guidance.
The Revenue Department explains the scope of inheritance tax, who may be liable, and the rates and calculation. The relevant Act and ministerial regulations should also be checked before using a figure in a real case.
If an estate includes real property, business shares, or assets outside Thailand, ask a qualified professional how the assets should be valued and which rules apply. The outcome depends on the type of asset and the facts of the case.