What Is Foreign Source Income?
Foreign Source Income is a tax classification for income deemed to arise outside the taxing country, with sourcing criteria set by national law and treaties.
Also known as: Foreign Income, Overseas Income.
How Foreign Source Income works
Foreign Source Income is identified by applying the taxing country's sourcing rules to each item, such as where personal services are performed, where a payer resides or where property is located, and the label then decides whether residents, non-residents or specific regimes bring the item into tax. Under United States law, for example, compensation for services performed outside the country and gains on foreign real property are foreign source, yet citizens and resident aliens remain taxed on worldwide income. Territorial or remittance-based systems may exempt or defer such income, and foreign tax credit limits usually depend on the classification.
Foreign Source Income vs Source of Income
Unlike Source of Income, which is the general set of rules locating any income item, Foreign Source Income is the outcome of those rules when the item is placed outside the taxing country.
Example
Illustrative example: A consultant resident in Country A performs work while physically in Country B for a client in Country C. Country A may treat the fee as foreign source but still tax the fee under worldwide taxation, granting a credit for Country B tax, while a territorial Country A might leave the fee untaxed locally.
Common misconception
Myth: Income paid into a foreign bank account is automatically foreign source income.
Reality: Foreign Source Income depends on sourcing criteria such as place of work or property location, not on the currency or bank account receiving the payment.
Frequently asked questions
Is foreign source income taxable?
Foreign Source Income is generally taxable for residents of worldwide systems, such as United Kingdom residents and United States citizens, subject to relief for foreign tax, while territorial or remittance-based systems may exempt or defer the income.
How do I know if income is foreign or domestic source?
Foreign Source Income is identified through national sourcing rules, which typically look at where services are performed, where the payer is resident or where property is located, and treaties may adjust the result.
Related terms
- Source of Income — Underlying rules which assign income a source
- Worldwide Taxation — System taxing residents on foreign source income
- Territorial Tax System — System often exempting foreign source income
- Foreign Tax Credit (FTC) — Relief limited by foreign source income amount
- Remittance Basis — Taxes foreign income only when brought in
Related guides
- Tax treaties and international taxation — Treaties allocating taxing rights over foreign income
- Thailand tax rules guide — Example of rules on foreign-sourced income
Sources
Last verified: 2026-10-08. This entry is general information, not tax or legal advice; rules vary by country and change over time.
