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CRS and CARF: your tax information travels on its own

Short answer: Spain and Thailand automatically exchange your financial data through CRS, and crypto gets covered by its cousin, CARF. Long answer: hiding isn't a strategy; changing your residency properly and documenting it is. Here's how it works and why it matters.

Published 18 · 07 · 2026 · Bexpat

What CRS is

CRS (Common Reporting Standard) is the OECD standard under which countries automatically exchange information about the financial accounts of non-residents. In plain terms: your bank identifies your tax residency and reports your balances and income to the relevant country's tax authority. It's not a case-by-case request; it's an annual, automatic flow. Spain and Thailand both take part, so the snapshot of your accounts crosses the border without anyone asking for it.

And CARF for crypto

What CRS did for bank accounts, CARF (Crypto-Asset Reporting Framework) does for crypto assets: it requires crypto service providers to report transactions and holders, and that information is also exchanged between countries. It's why portfolio hygiene before you move —documenting balances and acquisition cost— has gone from "good idea" to "essential."

Difference between CRS and CARF
CRSCARF
What it coversFinancial accountsCrypto assets
Who reportsBanks and financial institutionsCrypto service providers
HowAutomatic annual exchangeAutomatic exchange (rolling out)
What it means for youYour balances are visibleYour crypto transactions too

What it means for someone moving

The conclusion is liberating, not threatening: the right strategy was never to hide. Legally reducing taxes when you move to Thailand comes from changing your tax residency properly —the 180-day rule, the Thai certificate, an orderly exit from Spain— and taking advantage of local rates. That's solid and CRS-proof. The alternative —opaque accounts, odd movements— is fragile precisely because the information travels on its own.

Bexpat tip: check that your tax residency is correctly declared at every bank and exchange where you hold an account. CRS reports to wherever your institution believes you reside; if your bank still lists you as a Spanish resident once you already live in Thailand, the snapshot that travels is the wrong one. Updating that detail is one of the first things to do once you close out your change of residency.

Where Bexpat fits in

We don't handle your reports: we handle the move (visa, flight, arrival and apartment). The visa test is the starting point.

Frequently asked questions

What is CRS?

The OECD standard under which countries automatically exchange financial account information about non-residents. Your bank reports your balances and income to your country of tax residency. Spain and Thailand both take part.

What about my crypto?

CARF extends automatic exchange to crypto assets: crypto providers report transactions and holders. It's the crypto version of CRS, rolling out across participating countries.

Can I hide accounts?

It's neither viable nor advisable: the information travels on its own. What legally reduces taxes is changing your tax residency properly and documenting it, not hiding.

At ease because it's done properly

We handle the move. It all starts with a free, twenty-minute call.