Vietnam has an extensive double tax treaty (DTA) network of roughly 80 agreements, including with the US, UK, most of the EU, Australia, Canada, Japan, South Korea, Singapore, and China. Treaty relief is not automatic — taxpayers must actively apply to GDT (or the relevant local tax department) for treaty benefits, typically by submitting a treaty relief application with a tax residency certificate from the treaty partner country, well before or alongside the relevant tax filing.
Foreigners assuming their home-country treaty automatically prevents double taxation in Vietnam are often wrong in practice — GDT requires a specific application with notarized/legalized supporting documents, and missing the procedural steps means paying full Vietnamese tax with no automatic offset, leaving you to chase a refund or foreign tax credit later.
Key Facts
Vietnam has active DTAs with around 80 countries/territories, covering most major source markets for expatriates and investors (US, UK, Australia, Canada, most of the EU, Japan, South Korea, Singapore, China, and more).
Treaty relief must be actively claimed via a treaty application dossier filed with the local tax department, generally including a tax residency certificate issued by the treaty partner's tax authority, legalized/consularized and translated into Vietnamese.
Typical treaty provisions reduce or eliminate Vietnamese withholding tax on dividends, interest, and royalties paid to a treaty-country resident, and provide relief from double taxation on employment/business income via a foreign tax credit or exemption method.
The short-term business visitor exemption (commonly a 183-day rule within the relevant treaty article) can exempt employment income from Vietnamese tax if the individual is present under 183 days, paid by a non-Vietnam employer, and the cost isn't borne by a Vietnam permanent establishment — but Vietnam's domestic 183-day/leased-residence residency test can still apply for other purposes.
Where no treaty exists, Vietnam's domestic law still allows a unilateral foreign tax credit for residents on foreign-source income already taxed abroad, subject to a cap.
Steps
Confirm a treaty exists and identify the relevant article — Check whether Vietnam has a DTA with your country of tax residence and which article covers your income type (employment, dividends, business profits, capital gains, pensions).
Obtain a tax residency certificate from your home country — Request an official tax residency certificate from your home tax authority for the relevant tax year — this is the core evidentiary document GDT requires to grant treaty relief.
Legalize and translate documents — Have the residency certificate and supporting documents consular-legalized (or apostilled where applicable) and translated into Vietnamese by an authorized translator before submission.
File the treaty relief application — Submit the treaty application dossier to the local tax department, generally before the relevant withholding or filing deadline — late applications can still be considered but risk having tax already withheld at the non-treaty rate.
Claim a refund or credit if tax was already withheld — If Vietnamese tax was withheld before treaty relief was processed, file for a refund of the excess withholding, or claim a foreign tax credit in your home country if that route is more practical.
Timelines
Treaty relief application processing: Typically 15-30 working days once a complete dossier is filed
Tax residency certificate from the treaty partner country (current tax year)
Consular legalization or apostille of the residency certificate
Vietnamese translation by an authorized translator
Treaty relief application form (filed with the local tax department)
Employment contract, income statements, or dividend/interest payment evidence supporting the specific treaty article claimed
Common Mistakes
Assuming treaty relief applies automatically at source, then being surprised when full Vietnamese withholding tax is deducted anyway.
Submitting a tax residency certificate that has expired or covers the wrong tax year relative to the Vietnam income being claimed.
Skipping consular legalization/apostille and Vietnamese translation, which are near-universal procedural requirements GDT enforces strictly.
Confusing the treaty's short-term business visitor exemption (up to 183 days, employer-paid abroad) with Vietnam's own domestic tax residency test, which uses similar but not identical day-count and housing criteria.