What Is Source Taxation?
Source Taxation refers to the international tax principle under which a country taxes income arising within national territory, including income earned by non-residents.
Also known as: Source-Based Taxation, Source Principle.
How Source Taxation works
Source Taxation applies when income is treated as arising in a country under its sourcing rules, and the country then taxes the recipient on that income whether or not the recipient is resident, usually by withholding at payment or through a permanent establishment assessment for business profits. IRS guidance, for instance, states that most US-source income of foreign persons is subject to a 30% tax, generally withheld, with treaty reductions available. Double tax treaties based on the OECD or UN Model, the latter published in a 2021 edition, divide rights between source and residence states, and the residence state usually relieves remaining overlap.
Source Taxation vs Residence Taxation
Unlike residence taxation, which reaches a resident's worldwide income through personal connection, Source Taxation reaches only income with a territorial link and applies to residents and non-residents alike.
Example
Illustrative example: A freelancer resident in Country A licenses software to a company in Country B. Country B applies source taxation by withholding tax on the royalty, and the applicable treaty caps the rate; Country A then taxes the royalty and generally credits the Country B tax.
Common misconception
Myth: Leaving a country as a resident ends all tax exposure there.
Reality: Source Taxation can continue to reach income arising in a former residence country, such as rent, royalties or locally performed work, subject to domestic law and treaty limits.
Frequently asked questions
What is the difference between source and residence taxation?
Source Taxation taxes income because the income arises in a country, while residence taxation taxes a person because of residence, generally on worldwide income; treaties allocate rights between both and relieve overlap.
How do tax treaties limit source taxation?
Tax treaties limit Source Taxation by capping withholding rates on dividends, interest and royalties, requiring a permanent establishment before business profits are taxed, and assigning some income exclusively to the residence state.
Related terms
- Worldwide Taxation — Residence-based counterpart to source taxation
- Source Country — State exercising source taxing rights
- Withholding Tax — Main collection tool for source taxation
- Permanent Establishment (PE) — Threshold for source taxation of business profits
Related guides
- Tax treaties and international taxation — Treaty allocation of source and residence rights
Sources
Last verified: 2026-10-09. This entry is general information, not tax or legal advice; rules vary by country and change over time.
