International Tax Guides
Plain-language explainers on the concepts that decide where someone pays tax, how much, and on which income. Drawn from the OECD Model Tax Convention, PwC Worldwide Tax Summaries, and country-level authorities.
How Tax Residency Works: The 183-Day Rule and Beyond
How countries determine tax residency, why the 183-day rule is not enough, and the tests that actually trigger residency in OECD jurisdictions.
Territorial vs Worldwide Taxation: The Two Systems Explained
How territorial, worldwide, and remittance-based tax systems work — with the jurisdictions using each approach in 2026.
Withholding Taxes Explained: Dividends, Interest, and Royalties
How withholding taxes work on dividends, interest, and royalties — with treaty rates, holding-company implications, and 2026 country examples.
Double Taxation Treaties: How They Work and When They Help
How double tax treaties allocate taxing rights, the OECD Model framework, and what to check before relying on a treaty position.
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