A second passport or foreign tax ID does not automatically end China IIT residence. You may be resident twice.
183-day residence · Six-year rule · Worldwide IIT · CRS / FATCA · Tax flagship.
Run both domestic tests first. China: domicile or 183+ full days (sister page). The other country uses its own test (US citizen/green-card, UK statutory residence, etc.). If both say “resident” and a DTA exists, run the treaty tie-break — typically permanent home → centre of vital interests → habitual abode → nationality → mutual agreement. No treaty: you can stay dual; credits are not a slogan. The six-year foreign-source exemption is a different clock. CRS self-certs must match the story you tell SAT and the IRS/HMRC.
At a glance
| Question | Short answer |
|---|---|
| Second passport ends China? | No. |
| When tie-break? | Both domestic residents + a DTA. |
| No DTA? | Possibly dual. Credits, not vibes. |
| Six-year? | Separate page. |
| CRS? | Same story on every form. |
- Nationality is the last step, not the first.
- China-only, dual domestic residence, or treaty tie-break if a DTA applies.
- Two homes.
- China only
- Tie-break only if a DTA applies
Scope and legal framework
China IIT residence. Domicile or 183-day calendar-year presence. Details on the 183-day spoke. PR / five-star card is immigration, not this test.
Treaty tie-break (OECD-style). Most China DTAs follow permanent home, centre of vital interests, habitual abode, nationality, then MAP. Read the actual treaty — the US and some others have wrinkles.
Credits if you stay dual. Foreign-tax credit themes live on the worldwide page. A tie-break that fails does not make silence safer.
- No treaty: you may stay dual.
- China domestic test versus the other country’s domestic test.
- Tests.
- Domicile or 183-day page
- US citizen/GC, UK SRT…
Practical workflow
- CRS answers must match.
- Two domestic tests, then ask if a DTA exists, then build the evidence file.
- Evidence.
- 1. Two domestic tests
- 2. Is there a DTA?
- China 183 / domicile worksheet.
- Other country’s test in writing (not a passport photo).
- If both resident: treaty article + home / family / economic-ties file.
Common mistakes
- 183 days in Shanghai still matters.
- Treating a second passport as the end of China tax residence.
- Passport.
- Nationality is the last tie-break step — not the first
- Telling the bank one residence and SAT another.
- Skipping the six-year page because “we tie-broke to the US.”
- Using a rented Shanghai flat as “no permanent home in China.”
Action checklist
- Two domestic conclusions written.
- Treaty cited or “no DTA.”
- Home / family / days evidence folder.
- CRS forms match.
Frequently asked questions
US green card, living in Shanghai 200 days — who wins?
Often dual under domestic law. Then the China–US treaty tie-break and the US citizenship/GC worldwide system. This is a facts file, not a slogan. Bring days, home and family evidence to counsel.
Does a tie-break to the UK stop the six-year clock?
Do not assume it. Treaty residence and the SAT six-year exemption are different machines. Read both pages.
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