Tax residency decides which country has the first claim on a company's or an individual's income, fixed by statutory tests and observable facts rather than preference; it settles who taxes first, not how much. Individuals are usually tested by day count, most commonly 183 days in a tax year, backed by factors such as permanent home and family. Companies face either the incorporation test or the central management and control test used in the UK, Ireland and much of the Commonwealth, so a firm registered in one country but run from another can be resident in both. A double taxation agreement's tie-breaker then assigns one residence. For a licensed EMI, tax management-and-control evidence overlaps with the regulator's substance review.
How is tax residency determined?
Individuals are usually caught by a day-count test, with 183 days in a tax year the most common threshold, backed by secondary factors when the count is close: where the permanent home is, where the family lives, where economic interests sit. Companies face one of two tests. The incorporation test makes a company resident where it is registered. The central management and control test, used across the UK, Ireland and much of the Commonwealth, looks at where the board actually decides things.
Incorporated in one country, resident in another
Those two company tests do not always agree, and neither yields to the other. A firm registered in one jurisdiction whose directors meet, sign and decide somewhere else can be resident where the directors sit as well as where it is registered. Nothing has to be concealed for this to happen. It is the ordinary consequence of running an entity from a different place than it was formed.
Regulators ask the substance question too
A licensed EMI or payment institution is expected by its financial regulator to have real substance where it is authorized: local directors, local staff, decisions taken locally. The tax authority's management-and-control enquiry and the regulator's substance review draw on almost the same evidence — board minutes, employment contracts, who holds signing authority. Firms that satisfy one usually satisfy the other, and firms that fail one tend to fail both.
What is tax residency anchored to?
Residency follows facts that are awkward to relocate: where people are employed, where contracts are signed, where bank mandates are held. Re-registering a holding company without moving those things frequently creates a second residency claim instead of replacing the first, leaving the group worse off than before. Non-resident holders of local assets also meet foreign investment tax rules that apply on top of any residency-based charge.
Resident in two places at once
Dual residency under two sets of domestic rules is common enough to have a standard fix. Where a double taxation agreement exists, its tie-breaker assigns a single residence: for individuals through permanent home, center of vital interests, habitual abode and nationality in that order; for companies through place of effective management, or in newer treaties by agreement between the two authorities. Without a treaty both claims stand, and double taxation is the result.