Cross-Border Advisory · Relocation

Two countries.
One residency.
The tie goes to whoever proves it first.

When two countries' domestic rules both call you a resident, the risk isn't either country's rules alone — it's the unresolved tie between them. A treaty tie-breaker decides it, not a feeling, and not whichever tax authority asks first.

Map your move → Walk through the test ↓
What's actually movingYou, your income, or your tax residence — three crossings
What decides a tieTreaty tie-breaker, not domestic law alone
What we promiseA position built once — not contested across two countries
The tie-breaker, walked through

Most tax treaties resolve a tie in the same five steps.

Following the OECD Model Tax Convention's Article 4, the test runs in order — and stops at the first stage that gives a clear answer.

1
Permanent home available

Where do you have a home available to you on a continuing basis — owned or rented, not a hotel or a relative's spare room? If only one country qualifies, the test stops here.

2
Centre of vital interests

If a permanent home exists in both — or neither — which country holds your closer personal and economic ties: family, business interests, social and civic life, where your assets actually sit.

3
Habitual abode

If vital interests don't resolve it, the test turns to where you actually spend your time, measured over a meaningful period — not a single tax year in isolation.

4
Nationality

Still unresolved? The tie goes to the country whose nationality you hold — one of the few points in tax law where citizenship itself does the deciding.

5
Mutual agreement

In the rare case nothing above resolves it, the two countries' tax authorities settle it between themselves — the slowest and least predictable outcome, and the one good planning avoids needing.

Most cases never reach stage 3
What's actually at risk

The risk isn't either country's rules. It's the gap between them.

Unresolved dual residency
Without a documented tie-breaker position, both countries can assert a claim — leading to double taxation that a treaty was specifically designed to prevent, but won't prevent on its own.
Exit tax exposure
Several countries tax unrealised gains on the way out for departing residents. Leaving without reviewing this first can crystallise a tax bill on assets you haven't actually sold.
Permanent establishment risk
If your business moves with you, a foreign tax authority can claim your company has created a taxable presence there — based on where management decisions are actually made, not where the company is registered.
How Ayin helps

Settled in one place, not contested across two.

01 Map

What's actually moving — you, your income, or your tax residence — and which treaty and tie-breaker stage applies. Free, no charge.

02 Clear

The residence route, the day-count plan, the documented tie-breaker position, and the banking that actually works at the destination.

03 Hold

Annual review as the treaty, your circumstances, or either country's rules change — so the position doesn't quietly go stale.

The full Codex entry on tax-residency tie-breaker rules is still in drafting — this page reflects our current working knowledge of the OECD framework. Browse the Codex →

→ Map your own crossing in the Instrument → See what's changing across tracked regimes
Before you ask

The questions everyone asks first.

What is a tax residency tie-breaker test?
When two countries' domestic rules both classify you as resident, most treaties apply a sequential test — permanent home, then vital interests, then habitual abode, then nationality, then mutual agreement — stopping at the first stage that gives a clear answer.
Can I just leave and stop being tax resident in my old country?
Rarely automatically. Most countries apply day-count or permanent-home tests, and several apply exit taxes on unrealised gains. Breaking residency cleanly usually requires a documented, deliberate severing of ties.
Does moving my business with me create new risk?
Yes — you, your income, and your business's tax residence are three different crossings. A company can trigger permanent-establishment risk in a new country based on where management decisions are actually made.
How long does this take to do properly?
Properly sequenced, most personal relocations are workable inside a single tax year, though exit-tax exposure and treaty timing can extend that. We map the realistic timeline before any fee is charged.
Is this legal or tax advice?
No. Ayin is an advisory and compliance practice, not a law firm or tax adviser of record. We build and map the standing, and recommend qualified legal and tax counsel confirm the position in your specific jurisdictions.

Done right, this is settled in one place. Done loosely, it's contested across two.

Map your move →