What Is CARF?

The Crypto-Asset Reporting Framework (CARF) is the OECD's global standard for automatic exchange of crypto transaction data between tax authorities. Think of it as "CRS for crypto" — just as banks already report your account balances to foreign tax authorities, crypto exchanges will soon report your trading activity.

CARF was published by the OECD in June 2023, endorsed by the G20 in October 2023, and is now being implemented across 67 committed jurisdictions.

The Three-Wave Timeline

CARF adoption happens in three waves:

Wave 1: 2027 — Early Adopters (48 Jurisdictions)

The first exchanges of CARF data will occur in 2027, based on data collected throughout 2026. The 48 early adopter jurisdictions include:

Europe: Germany, France, United Kingdom, Italy, Spain, Netherlands, Switzerland, Luxembourg, Ireland, Austria, Belgium, Finland, Norway, Sweden, Denmark
Asia-Pacific: Japan, Australia, Singapore, South Korea, Hong Kong, Indonesia
Americas: Canada, Brazil, Argentina, Mexico
Others: South Africa, Saudi Arabia, Israel

Plus offshore financial centers: Cayman Islands, British Virgin Islands, Bermuda, Jersey, Guernsey, Isle of Man, Gibraltar, and others.

Wave 2: 2028 — Second Wave (19 Additional Jurisdictions)

A second group of 19 jurisdictions joins in 2028, including:

India — one of the world's largest crypto markets
Additional EU member states completing transposition
Southeast Asian nations

Wave 3: 2029 — United States

The US joins CARF exchanges in 2029, aligning with the IRS's own Form 1099-DA broker reporting rules. The US approach is distinct:

IRS Form 1099-DA: Domestic broker reporting (started 2025 for proceeds, 2026 for cost basis)
CARF: Cross-border data exchange with other participating jurisdictions
Both systems run in parallel, creating comprehensive coverage of US taxpayer crypto activity worldwide

What Gets Reported Under CARF

CARF reporting is broader than most people expect. Exchanges must report:

1. Exchange Transactions

Crypto-to-fiat: Every trade where you sell crypto for dollars, euros, pounds, etc.
Crypto-to-crypto: Every swap between different crypto assets (e.g., BTC to ETH)
Aggregate gross proceeds and transaction counts, broken down by asset type

2. Transfer Transactions

Retail payment transactions above jurisdiction-specific thresholds
Cross-border transfers between platforms

3. Account Information

Year-end balances for each crypto asset, valued in reporting currency
Account opening and closing dates

4. Identity Information

Full name, address, date of birth
Tax residence jurisdiction(s)
Tax Identification Number (TIN)

Key Difference from CRS 1.0

The original CRS only covered traditional bank accounts and custodial securities. CARF explicitly covers:

DeFi protocols — where an identifiable service provider exists
Stablecoins — not exempt despite being pegged to fiat
NFTs — treated as crypto assets for reporting purposes
Crypto ATMs — above de minimis thresholds

Who Must Report

CARF defines "Reporting Crypto-Asset Service Providers" (RCASPs) broadly:

Centralized exchanges (Coinbase, Binance, Kraken, etc.)
Crypto brokers and dealers
Crypto ATM operators
Certain DeFi front-ends with identifiable operators
Payment processors handling crypto transactions

An RCASP reports in every jurisdiction where it is tax resident, incorporated, managed, or maintains a place of business.

Look-Through Rules: No Hiding

CARF includes aggressive anti-avoidance provisions:

Self-certification: Exchanges must collect your declared tax residence(s)
Multiple residency: If you're tax resident in multiple countries, data goes to ALL of them
Entity look-through: Shell companies, trusts, and nominees are looked through to the beneficial owner
Inconsistency checks: If your declared residence doesn't match your phone number, address, or IP indicators, the exchange must investigate

The practical effect: using offshore structures, nominee accounts, or multi-jurisdiction arrangements will not prevent your data from reaching your home tax authority.

CARF vs. IRS 1099-DA: Side by Side

Feature	IRS 1099-DA	CARF
Scope	US brokers only	67 jurisdictions globally
First year	2025 (proceeds) / 2026 (cost basis)	2027 (data from 2026)
Reports to	IRS + taxpayer	Home tax authority via exchange
Covers DeFi	Limited (broker definition)	Yes (identifiable service providers)
Cross-border	No	Yes — automatic exchange
Cost basis	Yes (from 2026)	No (proceeds and balances only)

For US taxpayers, both systems operate simultaneously. A US person trading on a Singapore exchange will have data reported via both 1099-DA (if the exchange qualifies as a US broker) and CARF (Singapore → US exchange).

How to Prepare: A Practical Checklist

For Individual Investors

Audit your exchange accounts — Know which platforms hold your data, and in which jurisdictions those platforms operate
Update self-certifications — Ensure your tax residence declaration on every exchange is accurate and current
Export complete transaction history — Don't rely on exchange summaries alone; download raw transaction data for independent verification
Reconcile cost basis now — The biggest risk is having your exchange-reported proceeds not match your filed tax return; resolve discrepancies before CARF data reaches your tax authority
Consider voluntary disclosure — If you have unreported crypto income from prior years, voluntary disclosure programs carry lower penalties than audit-triggered assessments
Use automated tools — dTax imports from 23+ exchange formats, supports 8 international cost basis methods, and offers CARF transaction data export to preview what will be reported

For Tax Professionals

Audit all client crypto holdings — Including foreign platform accounts
Update engagement letters — Explicitly cover CARF reporting obligations
Plan for 2027 data matching — Tax authorities will cross-reference CARF data with filed returns
Implement CARF-ready workflows — Use tools that can generate CARF-format exports for client review
Educate clients proactively — Many crypto holders don't know CARF is coming

Frequently Asked Questions

Will my government know about ALL my crypto?

Every transaction on a platform operated by an RCASP in a participating jurisdiction — yes. Self-custodied crypto in personal wallets is not directly reportable under CARF, but on-ramp and off-ramp transactions (moving crypto to/from exchanges) are.

Does CARF cover DeFi?

Partially. Where a DeFi protocol has an identifiable service provider (a company running the front-end), that provider may qualify as an RCASP. Fully decentralized, autonomous protocols with no identifiable operator are harder to capture, but the OECD has flagged this for future guidance.

Can I avoid CARF by using decentralized exchanges?

Using DEXes may reduce the data that RCASPs report, but it does not eliminate your tax obligations. You are still required to report all crypto gains and income on your tax return. Additionally, on-chain analytics firms increasingly provide data to tax authorities, and future regulations may extend reporting obligations to additional DeFi participants.

What happens if my exchange data doesn't match my tax return?

Tax authorities will receive CARF data and cross-reference it against filed returns. Discrepancies may trigger automated compliance notices, audits, or penalties. The safest approach is to ensure your records are accurate and complete before 2027.

How does dTax help with CARF?

dTax provides:

CARF transaction data export — Preview what exchanges will report, in the exact CARF format
8 cost basis methods — Match your country's required method (FIFO, Share Pooling, PMPA, etc.)
23+ exchange imports — Consolidate all your trading data in one place
CARF 2027 countdown — Track days remaining until automatic exchange begins
15-country CARF status — See adoption timelines for each jurisdiction on our global tax rates page

CARF is the most significant change to global crypto tax reporting since the original CRS. Don't wait until 2027 — start preparing now. Track your crypto taxes with dTax.