Greater China CRS Reporting 2026: How Mainland China, Hong Kong, Taiwan and Macau Exchange Your Account Data

What CRS does

Under the OECD's Common Reporting Standard, financial institutions identify accounts held by foreign tax residents, collect a self-certification of tax residence at account opening (plus annual reviews of pre-existing accounts), and report account details — name, address, residence jurisdiction, taxpayer ID, date of birth, account balance and income — to their home tax authority once a year. That authority then automatically exchanges the data with the account holder's residence jurisdiction. No request needed, no tip-off required.

Implementation status by jurisdiction

Hong Kong's network is the widest: 126 reportable jurisdictions (expanded from 75 by the 2019 ordinance, effective 1 January 2020). Taiwan's network is the narrowest by design — as a non-MCAA jurisdiction it exchanges only under bilateral agreements (Australia, Japan, UK confirmed).

What financial institutions must do

Banks, securities firms, insurers with cash-value products, trusts and asset managers in all four jurisdictions must:

1. Collect self-certification of tax residence from every new account holder (individual or entity, including controlling persons of entities);
2. Run due-diligence procedures on pre-existing accounts to find indicia of foreign residence;
3. Report reportable accounts to the local tax authority annually (Macau's deadline, for example, is 30 June).

Missing or inconsistent documentation does not make an account invisible — it triggers reporting based on the indicia the institution already holds.

Impact on high-net-worth individuals

Two practical consequences, with no sugar-coating:

• The "offshore account is invisible" assumption is dead. Any financial account — bank, securities, cash-value insurance, trust or asset-management account — held outside your tax residence is reported each year and exchanged back to your residence jurisdiction. Holding structures across Hong Kong, Singapore, the mainland and Taiwan are all inside the net.
• New accounts everywhere require tax-residence self-certification at opening. Contradictory answers, or residence in a jurisdiction inconsistent with your documents, get flagged. Deliberately mis-certifying is a compliance offense in its own right, separate from any underlying tax issue.
• Entity accounts look through to controlling persons. A BVI or Cayman company holding the account does not shield the individual behind it — the institution identifies and reports the controlling persons' residences too. This is where most legacy "offshore company" planning quietly fails under CRS.

What CRS does not cover (yet)

CRS is powerful but not total. Know its boundaries:

• Real estate held directly is not a financial account — a condo in your own name is not CRS-reported (rental income and sales still have their own tax rules, and some jurisdictions run separate property-transaction reporting).
• Crypto held in self-custody (your own wallet, not an exchange account) sits outside CRS; exchange and custodian accounts are generally in scope. A separate OECD framework for crypto (CARF) is rolling out to close this gap.
• Accounts below due-diligence thresholds still get reviewed — CRS has no minimum balance that exempts an account from identification, only procedural thresholds for how deeply pre-existing accounts must be searched.

None of these are planning tools — they are simply the current edges of the regime, and the direction of travel is uniformly toward more coverage.

Mainland–Hong Kong–Taiwan data flows to know

• Mainland ↔ Hong Kong: bilateral CRS arrangement effective 6 September 2018 — Hong Kong accounts of mainland tax residents flow to the State Taxation Administration, and vice versa.
• Taiwan's bilateral model: exchanges run only with signed partners. If your residence jurisdiction has no agreement with Taiwan, Taiwan-held accounts are not automatically exchanged to it — but do not confuse this with secrecy: Taiwan's institutions still run full due diligence, and treaty/upon-request exchange channels remain.

Next steps

1. Inventory every account across the four jurisdictions (plus Singapore, the US and anywhere else) and confirm the tax residence you certified at each — mismatches are the single most common CRS problem.
2. Fix documentation before the next reporting cycle: if your residence changed (emigration, new visa, 183-day shifts), update self-certifications proactively; banks report what they have on file.
3. Do not close-and-reopen to dodge reporting — re-opened accounts get fresh self-certification, and closures themselves can be reportable events.
4. Get advice before restructuring: moving assets between Hong Kong, Singapore or mainland entities changes which authority reports, not whether reporting happens.