Double tax treaties — how foreign investors apply them to reduce tax in Vietnam

When a foreign investor receives dividends, loan interest, or royalties from Vietnam, that income can be taxed twice: once in Vietnam (where the income arises) and once in the investor’s country of residence. A Double Taxation Agreement (DTA) is the legal instrument that prevents this — allowing the investor to pay tax only once, or at a rate far lower than Vietnam’s domestic tax law. As of July 2026, Vietnam has DTAs in force with 80 countries and territories, forming a wide treaty network for inbound investment.

This guide explains how foreign investors apply DTAs to reduce tax in Vietnam: eligibility conditions, the current legal framework, the filing dossier and procedure, and the mistakes that get applications rejected. Important update: since 1 July 2026, treaty procedures have been governed by Circular 95/2026/TT-BTC — older articles still citing Circular 80/2021/TT-BTC are out of date.

1. What is a double tax agreement?

A DTA is a bilateral treaty between Vietnam and another country or territory that allocates taxing rights over the same income between the two states and prevents fiscal evasion. Most of Vietnam’s DTAs follow the OECD model and cover:

• Corporate income tax on business profits, dividends, interest, and royalties;
• Personal income tax on salaries, wages, and capital gains;
• Dispute resolution where the two states interpret taxing rights differently.

The core principle: once income has been taxed in Vietnam in accordance with the treaty, the investor’s country of residence must eliminate double taxation (by exemption or by crediting the tax paid in Vietnam). The investor’s total tax burden is therefore not doubled.

2. How can foreign investors reduce tax under a DTA?

Vietnam’s DTAs typically offer three relief mechanisms:

2.1. Full exemption in Vietnam for certain income

Some treaties provide that Vietnam may not tax (or only the residence state may tax) specific categories of income — for example, profits from international transport. Qualifying investors file for a full exemption from Vietnamese tax on that income.

2.2. Reduced withholding tax rates

This is the most-used mechanism. Instead of Vietnam’s domestic withholding rates, the investor applies the lower treaty rate. Typical rate ranges across Vietnam’s DTAs:

• Dividends: generally 5% to 15%, depending on the treaty and the ownership percentage (higher ownership usually means a lower rate);
• Interest: commonly capped at 10%;
• Royalties: commonly capped at 10%.

Caution: these are common ranges only. The exact rate must be read from the specific bilateral treaty between Vietnam and the investor’s country of residence — each treaty has its own rate schedule.

2.3. Foreign tax credit in the residence state

Even after paying tax in Vietnam, the investor may credit that tax against its home-country tax liability. This mechanism is governed by the residence state’s domestic law, so investors should coordinate with their home-country tax advisers.

3. Conditions for treaty benefits

Treaty relief is not automatic for every foreign investor. Under Vietnam’s DTA implementation guidance, the taxpayer must:

• Be a tax resident of the treaty partner state — proven by a Certificate of Residence issued by the home tax authority;
• Be the beneficial owner of the income — the person genuinely entitled to it, not a mere conduit;
• Derive income covered by the treaty — the income type must fall within the treaty’s scope;
• Complete the notification/application procedure with the Vietnamese tax authority (see section 5).

Vietnamese tax authorities increasingly scrutinize beneficial ownership, especially for multi-tier holding structures set up mainly to access treaty benefits (treaty shopping). Investors should document genuine business substance in their residence state.

4. The current legal framework: Circular 95/2026/TT-BTC

This is the most important recent change — and one many investors and advisers still miss:

• Circular 95/2026/TT-BTC, issued by the Ministry of Finance on 1 July 2026 and effective from the signing date, is the current guidance on DTA implementation. It replaced Circular 205/2013/TT-BTC and Circular 45/2021/TT-BTC, and for the first time provides detailed guidance on the Mutual Agreement Procedure (MAP) and Advance Pricing Agreements (APA).
• The Law on Tax Administration No. 108/2025/QH15 took effect on 1 July 2026, replacing Law No. 38/2019/QH14. As a result, guidance documents issued under Law 38/2019 — including Circular 80/2021/TT-BTC — are no longer the legal basis for new treaty relief filings. Article 62 of Circular 80/2021 (the old treaty-relief procedure) no longer applies.

Many online guides still cite Circular 80/2021/TT-BTC. Investors should cross-check against Circular 95/2026/TT-BTC and confirm the latest procedure with their directly managing tax authority before filing.

5. Dossier and procedure for treaty-based tax exemption or reduction

As a rule, the foreign investor must submit the dossier to the Vietnamese tax authority before the tax obligation arises. The basic dossier comprises:

1. Application letter for treaty-based exemption/reduction, using the form in the appendix to the current guiding circular;
2. Certificate of Residence: original or certified copy, issued by the residence-state tax authority for the year immediately before the notification year, duly consularly legalized;
3. Copies of contracts signed with Vietnamese (and foreign, if any) organizations or individuals, certified by the taxpayer;
4. Power of attorney (if an authorized representative handles the procedure).

Practical notes:

• Consular legalization takes the most time — the Certificate of Residence must be legalized before it is valid in Vietnam. Start this process early in the tax year.
• If a complete dossier was filed in a prior year, subsequent years usually require only newly signed contracts (if any) — significantly reducing paperwork.
• At finalization, the taxpayer submits the Certificate of Residence for that tax year (legalized) together with the final tax return.
• Where the two states disagree on treaty application, investors may consider the Mutual Agreement Procedure (MAP) — newly detailed under Circular 95/2026 — allowing the two tax authorities to consult and eliminate taxation not in accordance with the treaty.

6. Mistakes that get applications rejected

• Citing expired regulations: filing under Circular 80/2021 forms or procedures when that circular is no longer the applicable basis.
• Certificate of Residence not legalized or issued for the wrong tax year.
• Late filing — the authority may refuse treaty benefits for that tax period.
• Failing to prove beneficial ownership, particularly with multi-tier intermediary structures.
• Assuming the Vietnam–US DTA is in force: signed in 2015, it remains unratified and is not effective. US investors in Vietnam cannot yet claim treaty benefits.
• Applying the wrong rate: using one treaty’s rate cap for an investor resident in a different treaty state — each bilateral treaty stands alone.

7. Frequently asked questions

Must investors complete the treaty procedure every year?

Yes. Treaty relief is assessed per tax year and tied to that year’s Certificate of Residence. However, once a full dossier exists from a prior year, later years follow a simplified procedure.

Can the Vietnamese subsidiary handle the procedure for its foreign parent?

Yes, under a valid power of attorney. In practice, the Vietnamese payer (the party withholding and remitting tax) usually coordinates closely with the foreign investor on the treaty dossier.

What if tax was already withheld at the higher domestic rate?

In principle, a qualifying taxpayer may claim a refund under tax administration law. Still, the safest and cheapest route is to complete the treaty dossier before the income is paid.

Do treaty rates apply automatically?

No. Treaty benefits are never automatic — the investor must proactively file and obtain the tax authority’s acceptance. Without filing, the higher domestic rate applies.

Sources

• Circular 95/2026/TT-BTC dated 1 July 2026 of the Ministry of Finance (effective from signing) — DTA implementation, MAP, APA guidance.
• Law on Tax Administration No. 108/2025/QH15 (effective 1 July 2026).
• Bilateral Double Taxation Agreements between Vietnam and each partner state/territory (consult the specific treaty text for rate schedules).

This article is for general information only and does not replace legal advice for specific cases. Treaty rate schedules may change; investors should check the latest bilateral treaty text and consult a professional before acting.

Contact FLAT Law Firm: if your business needs a treaty-eligibility review, preparation of exemption/reduction dossiers, or handling of DTA disputes, our team is ready to assist. See more articles on foreign investment at flaw.vn.

This article was prepared by the FLAW AI Legal Council, has passed internal QA review, and is pending owner approval. It is not the opinion of a licensed human lawyer and does not replace direct legal advice.