What is the difference between an exemption and a credit under a treaty?

Both remove double taxation but work differently. With the exemption method, one country simply does not tax income the treaty assigns to the other. With the credit method, your home country still taxes the income but subtracts the tax already paid abroad. The treaty specifies which method applies to each income type.

Does a double taxation treaty mean I pay no tax in one country?

Not usually. A treaty divides taxing rights and relieves overlap; it rarely makes income tax-free. In many cases you still pay some tax in the host country and the balance at home, or vice versa. The point is that the same income is not taxed in full twice.

What happens if there is no treaty between two countries?

Without a treaty, each country applies its own domestic rules, and the same income can be taxed in both. Some countries offer unilateral relief, such as a foreign tax credit, to soften this, but it is not guaranteed. The absence of a treaty raises the risk and cost of cross-border working.

How does a treaty relate to permanent establishment?

Treaties define when a company's activity in another country becomes a taxable presence, or permanent establishment. That definition affects whether corporate profits, and sometimes employee income, fall within the host country's tax net, which is why treaties matter when placing staff abroad.

Glossary

Double Taxation Treaty

A double taxation treaty is a bilateral agreement between two countries that decides which one has the right to tax particular kinds of income when a resident of one country earns it in the other, preventing the same income from being taxed twice.

Reviewed by Teamed's in-house employment-law team·Last updated 28 July 2026

Also known as: double tax agreement, double tax treaty, tax treaty

What is Double Taxation Treaty?

A double taxation treaty, also called a double tax agreement, is a deal between two countries that stops the same income being taxed in full by both. When someone lives in one country and earns in another, both may claim the right to tax that income. The treaty sets rules that decide which country taxes what, and how any remaining overlap is relieved.

Treaties cover categories such as employment income, business profits, dividends, interest and pensions. For cross-border and mobile workers, the key questions are usually where employment income is taxed and when a short assignment stays taxable only at home. Most treaties follow a common framework, the OECD Model Tax Convention, which is why their structure looks familiar from one country pair to the next.

Relief is not automatic. To benefit from a treaty, the taxpayer or their employer generally has to claim it and provide evidence of residence. Overlooking that step can mean paying tax twice and reclaiming it later, or missing the relief altogether.

How does a double taxation treaty prevent double taxation?

It assigns taxing rights between the two countries for each type of income, and where both can still tax, it provides relief. That relief usually comes as an exemption, where one country steps back, or a credit, where your home country reduces its tax by the amount already paid abroad. The result is that income is taxed once overall.

Why do treaties matter for employing people across borders?

When an employee works in a country different from where they are resident, a treaty often decides whether their salary is taxed at home, in the host country, or split between the two. It can also protect a short assignment from host-country tax. Getting this right avoids both double taxation and unexpected local liabilities.

Does treaty relief apply automatically?

No. In most cases the taxpayer or their employer must actively claim the treaty benefit and show proof of tax residence, often with a certificate from the home tax authority. If no claim is made, the default domestic rates can apply in both countries, and any relief has to be recovered afterwards through a refund process.

Key facts

Treaties based on the OECD Model: More than 3,000 in forceThe OECD Model Tax Convention, first published in 1963 and regularly updated, forms the basis of a global network of more than 3,000 bilateral tax treaties.Source: OECD· verified 2026-07-28

Frequently asked questions

What is the difference between an exemption and a credit under a treaty?
Both remove double taxation but work differently. With the exemption method, one country simply does not tax income the treaty assigns to the other. With the credit method, your home country still taxes the income but subtracts the tax already paid abroad. The treaty specifies which method applies to each income type.
Does a double taxation treaty mean I pay no tax in one country?
Not usually. A treaty divides taxing rights and relieves overlap; it rarely makes income tax-free. In many cases you still pay some tax in the host country and the balance at home, or vice versa. The point is that the same income is not taxed in full twice.
What happens if there is no treaty between two countries?
Without a treaty, each country applies its own domestic rules, and the same income can be taxed in both. Some countries offer unilateral relief, such as a foreign tax credit, to soften this, but it is not guaranteed. The absence of a treaty raises the risk and cost of cross-border working.
How does a treaty relate to permanent establishment?
Treaties define when a company's activity in another country becomes a taxable presence, or permanent establishment. That definition affects whether corporate profits, and sometimes employee income, fall within the host country's tax net, which is why treaties matter when placing staff abroad.

Related terms

Note

This is general information, not legal advice. Statutory rules vary by country and change over time.

Glossary

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Last verified 2026-07-28