CARF & 1099-DA: what it means for crypto tax

CARF and 1099-DA are new reporting frameworks expanding how crypto activity reaches tax authorities, the OECD's Crypto-Asset Reporting Framework internationally, and Form 1099-DA from US exchanges. Both mean more of your activity is reported automatically.

General information, not tax advice. Crypto tax rules differ by country and change over time, verify against your country's guidance or a qualified advisor.

An example

A US exchange now reports gross proceeds on Form 1099-DA, so those disposals reach the tax authority whether or not you report them.

Why it matters for your tax

As automatic reporting expands, accurate self-reporting matters more, because a position that depends on activity never being seen is fragile.

CryptaTax handles this automatically across your wallets and exchanges, so the concept is applied consistently without you tracking it by hand. Try the crypto tax calculator →

Related terms

• 1099-DA form
• Reporting
• Tax by country

See the full crypto tax glossary for every term, or the crypto tax guides for how they fit together.

CARF & 1099-DA: what it means for crypto tax

Definition in context

The Crypto-Asset Reporting Framework (CARF) is an international standard developed by the OECD for the automatic exchange of information on crypto-asset transactions between tax authorities. Form 1099-DA is a US information return that digital asset brokers will use to report certain sales and exchanges of digital assets to the IRS and to taxpayers. Together, they represent a shift toward systematic, automated reporting of crypto activity, reducing reliance on self-reporting.

Why it matters to crypto records

These frameworks mean that tax authorities will increasingly receive third-party data on your crypto transactions. This makes accurate record-keeping essential, as discrepancies between your reported income and the data received from exchanges or brokers can trigger inquiries. For crypto users, understanding what is reported helps in reconciling your own records with official reports, ensuring consistency and reducing the risk of errors or audits.

Record example

Suppose you bought 1 ETH for $2,000 and later sold it for $3,000 on a centralized exchange. Under the new reporting, the exchange may issue a 1099-DA showing the gross proceeds of $3,000. Your own records should show the cost basis of $2,000 and the resulting gain of $1,000. When you file your taxes, you report the gain, and the IRS can cross-check this against the 1099-DA. If you had failed to report the sale, the mismatch would be flagged.

Distinctions and next steps

CARF is international, while 1099-DA is US-specific. CARF focuses on information exchange between countries, whereas 1099-DA is a domestic reporting form. Unlike a tax form that calculates tax due, these are information returns that provide data. To prepare, ensure you have complete transaction history from all platforms, including decentralized exchanges and wallets, as reporting may not cover all activity. Regularly reconcile your records with any forms you receive, and consider using crypto tax software to maintain accurate records.

Reporting terminology should be kept separate from the underlying transaction evidence. Build a file that links the statement or report received from a platform to the wallet and exchange records that support it, then record any differences for review. A report may use its own categories, dates or asset names, so do not assume that a label alone resolves the accounting or tax treatment. Preserve the version received, the period it covers and the reconciliation notes. This makes later reporting work traceable without claiming that one reporting framework determines every local filing outcome.

A careful next step

Before acting on this term, return to the original record and write down the question it raises: what changed, which source proves it, and whether another related concept describes the event more accurately. Keep that note with the export or wallet evidence. It makes a later review faster and avoids turning a short label into an unsupported conclusion about tax, accounting or reporting.