Cross-border tax terms — O
4 terms beginning with O, each defined at mechanism level.
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These entries describe how a term works rather than what it is worth in a given year. That is deliberate — figures move, and a figure remembered from a definition is the kind that ends up on a return unchecked.
Cross-border vocabulary is mostly a record of disagreement. Two countries look at one arrangement and classify it differently, and the gap between the classifications is where the double tax, or the unintended relief, actually lives. So every entry is written in three parts: the meaning, the point at which it costs something, and the filings on this site that it governs.
If this term has turned up in a letter, a slip or an adviser's email and you are not sure which side of it you are on, that is a short call to the helpline rather than a research project. Every page here carries the name of the person who reviewed it and the date they did.
- Ordinarily resident — A status used in some systems for someone habitually resident in the country, which can limit or extend the income within the charge independently of the residence test.
- OIDAR — India's regime for online information and database access services, taxing a foreign supplier on sales to Indian consumers.
- One-stop scheme — A centralised registration and return arrangement letting a seller account for multiple countries' tax through a single filing.
- ODI — Overseas direct investment from India, which brings annual performance reporting for the life of the investment.
What the O entries have in common
4 terms begin with O. Follow the entry itself for the mechanism, the filings it decides, and the fixed fee attached to that work. Three to start with: Ordinarily resident, OIDAR and One-stop scheme.
Nearby letters
N — 15 terms · P — 22 terms. The full A–Z lists all 297 terms in one place.
Back to the full glossary · Cross-border tax answers · Side-by-side comparisons
Files that look like this one
Green Card Kept, Moved to Canada — Both Returns Still Due
Holding a green card does not end the US filing obligation, and living in Canada starts a Canadian one. The engagement fixes residence under the treaty tie-breaker, then decides which return the relief is claimed on so the two do not contradict each other.
Read how this one runsA Canadian Working in the US on a Work Visa
Immigration status and tax residence are different tests, and a visa says nothing about which country taxes the salary. The file fixes residence, applies the employment article, and sequences the two returns so the credit lands where it is usable.
Read how this one runsTrips That Added Up to a Filing Obligation
Short visits are tracked against a treaty threshold that is measured over a moving window rather than a calendar year. Where the threshold is passed, the obligation reaches back over the whole period.
Read how this one runsThree Countries in One File and Two Treaties That Disagree
Income sourced in one country, paid to a resident of a second, held through an entity in a third: three bilateral treaties, no three-way rule. The analysis works out which pair governs each flow, and whether the middle entity is entitled to anything at all.
Read how this one runsPaying a Dividend Up to a Foreign Parent
The withholding rate depends on the treaty, on the size of the holding, and on whether the parent is the beneficial owner rather than a conduit. Establishing all three before the payment is what secures the lower rate at source.
Read how this one runsTreaty Relief Claimed on a Cross-Border Estate
The estate article can extend a proportionate credit where the two systems would otherwise both tax the same asset. Claiming it requires a valuation and a disclosure the estate may not expect to make.
Read how this one runsAn Assignment Priced Without Counting the Days
Nearly every relief in a mobility file — treaty exemption, residence, social security — is decided by a day count that has to be evidenced. The engagement puts the tracking in place at the start, because it cannot be reconstructed at the end.
Read how this one runsAn Assignee Paid at Home and Taxable Away
Where pay stays on the home payroll but the tax arises elsewhere, a shadow run reports the second country's liability without duplicating the payment. Setting it up correctly is what keeps both sides reconcilable.
Read how this one runsAll case studies — every published engagement in one place.
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