Bilateral Tax Treaty
An international agreement between two states that allocates taxing rights over cross-border income and provides relief from double taxation.
Definition
What it is
A bilateral tax treaty (also called a Double Taxation Convention or DTAA) is a binding agreement between two countries that overrides domestic law to the extent it is more favourable. Most modern treaties are based on the OECD Model Tax Convention or, for treaties involving developing countries, the UN Model. They cover business profits, dividends, interest, royalties, capital gains, employment income, and several special categories.
Core articles
- **Residency (Article 4)** and tie-breaker rules
- **Permanent establishment (Article 5)**
- **Business profits (Article 7)**
- **Dividends, interest, royalties (Articles 10, 11, 12)** with reduced WHT rates
- **Capital gains (Article 13)**
- **Employment income (Article 15)** with the 183-day rule
- **Methods to eliminate double taxation (Article 23)**: credit or exemption
- **Mutual Agreement Procedure (Article 25)**
- **Exchange of information (Article 26)**
Anti-abuse and the MLI
Since BEPS Action 6, treaties typically include a Principal Purpose Test (PPT) and/or a Limitation on Benefits (LOB) clause. The OECD Multilateral Instrument modifies thousands of treaties simultaneously. Treaty access requires residency, beneficial ownership, and increasingly substance.
When you'll encounter it
You will use a bilateral tax treaty whenever you reduce withholding tax on cross-border dividends, interest, royalties, or services, when assessing whether activities abroad create a permanent establishment, when relocating executives, when claiming foreign tax credits, and when invoking a Mutual Agreement Procedure during double-taxation disputes.
FAQ
How many tax treaties exist?
More than 3,000 bilateral tax treaties are currently in force worldwide, with the OECD Model serving as the dominant template.
Do treaties always reduce tax?
They usually reduce or allocate taxing rights, but they cannot create a tax liability that does not exist under domestic law - a treaty is a relieving instrument, not a charging one.
What is the Principal Purpose Test?
A general anti-abuse clause that denies treaty benefits where one of the principal purposes of an arrangement was to obtain those benefits, unless granting them would be in line with the treaty's object and purpose.
References
- OECD - Tax treaties https://www.oecd.org/tax/treaties/
- UN - Model Double Taxation Convention https://www.un.org/development/desa/financing/document/un-model-double-taxation-convention-developed-and-developing-countries-2021