What is the difference between juridical and economic double taxation?
Juridical double taxation is the same person taxed on the same income by two states. Economic double taxation is the same profit taxed in two different hands, typically a company and someone related to it. The distinction is not academic, because treaty relief is built for the first. Credit and exemption articles operate on a taxpayer's own income and a taxpayer's own foreign tax, so they work when the person on both sides is you. Where the two taxpayers are different persons, those articles have nothing to attach to, and relief has to come from an adjustment in one of the countries instead. Establishing which of the two you are holding is the first step, because it decides the route.
Both countries say I am resident — who wins?
Neither, until the question is decided under the treaty. Each country applies its own residence test, and both can be satisfied at once, which is the purest form of juridical double taxation: one person, one income, two residence claims. Where a treaty covers the corridor it contains a sequence of tie-breaker tests applied in order, so the answer turns on facts such as where a permanent home is available to you and where your personal and economic ties are centred, rather than on which country asked first. The outcome is a single treaty residence for the year, with the other country restricted to what it may tax as a source country.
Why does my accountant call it juridical double taxation?
To mark which kind of problem you have. The word juridical points at the identity of the taxpayer: it is you who is taxed twice, on the same income, by two states. That label tells anyone reading the file that the relief articles in a treaty are in scope, and that the work is to decide which state has the prior right and which gives relief. The alternative label would put the same income in two different hands and send the file down a different route entirely. Practitioners use the term because it is shorter than the sentence, not because the concept is difficult.
Can two countries tax me on the same salary?
Yes, and it is common. One country may tax it because the work was done there, and the other because you live there. Both claims can be valid under domestic law at the same time, and nothing in that is an error. What a treaty does is rank them: it identifies which state may tax employment income and on what conditions, and it obliges the other to relieve the tax the first has charged, by credit or by exclusion. The relief is claimed on a return. Until it is claimed you are the same person, with the same salary, holding two assessments, which is exactly the situation the term describes.
Does a treaty always fix juridical double taxation?
It is designed to, and it usually does, though not always completely. A treaty can only relieve the taxes and the persons it covers, so a levy outside its scope, or a corridor with no agreement at all, leaves domestic relief as the only route. Relief by credit is also capped at the residence country's own tax on the income, so a higher foreign rate leaves a residue with you. And where the two countries disagree about the facts or about the article, the treaty's own procedure for the authorities to take the case up between them may be the only way to reach a single answer.
How do I prove I am resident of one country?
With the document the other country asks for, which is normally a residence certificate issued by the tax authority of the country you claim to be resident in, for the year in question. It is evidence of the domestic position rather than proof of the treaty outcome, so where both countries claim you it supports your case without settling it. Keep the underlying material as well: the dates you were present, where a home was available to you, where your family lived, where your accounts and income sources sat. If residence is ever examined, that record is what decides it, and it is far easier to assemble in the year than afterwards.
Which kind of investor income is most exposed to double taxation?
Dividends from a foreign corporation. They have already borne corporate tax, the source country withholds on payment, and your residence country taxes the receipt — three layers, only two of which a credit can reach. Interest and royalties carry the same source withholding without the corporate layer. This is why the withholding article and the paperwork that reduces it matter more for portfolio income than for salary. See dividends, interest and royalties articles.
Is double taxation illegal?
It is legal. Two countries can each have a valid claim on the same income — one because the income arose there, the other because you live there — and nothing prohibits both from exercising it. What exists instead is relief: tax treaties allocate the claim, and domestic law gives a credit for foreign tax paid. The relief is not automatic, though. It is claimed on a return, and unclaimed relief is simply lost. See how double taxation is relieved.
