Crypto Tax Reporting Goes Global as CARF Takes Effect Across 48 Jurisdictions Starting 2026

What CARF changes for exchanges

Under CARF, in-scope crypto platforms will be required to collect and verify significantly more information from users, including tax residency details and self-certifications, and to report balances and transactions annually to tax authorities.

Lucy Frew, partner and head of the Global Regulatory & Risk Advisory Group at international law firm Walkers, told Cointelegraph that the framework represents a “game-changer” for the industry, reshaping compliance obligations for both businesses and customers.

For exchanges, CARF is expected to trigger deep operational changes rather than superficial compliance updates. Platforms will need to integrate the new reporting rules into existing Know Your Customer (KYC) and Anti-Money Laundering (AML) systems, redesign onboarding processes, and invest in reporting infrastructure capable of producing standardized, machine-readable tax data.

UK-based exchanges are already preparing for these shifts. Asher Tan, CEO and co-founder of CoinJar, said users will be asked to provide additional tax residency information as CARF rules are phased in.

He noted that regulated platforms face the challenge of meeting regulatory expectations while preserving a clear and user-friendly experience, something that could ultimately become a competitive advantage as crypto adoption continues to expand.

Automatic reporting replaces ad hoc disclosures

In the UK, the CARF framework, referred to locally as CAFR, will require crypto-asset service providers to submit detailed reports directly to HM Revenue & Customs (HMRC).

Andrew Duca, founder of Awaken Tax, explained that the shift lies in automation and consistency. While exchanges already provide data to HMRC upon request, he said the process has been fragmented. From 2026 onward, providers will be required to submit standardized reports automatically, covering user details and transaction histories across crypto conversions, exchanges, wallet transfers, stablecoin activity, and crypto debit card payments.

The first reporting deadline is set for 31 May 2027, covering activity from the 2026 calendar year, with annual submissions required thereafter. HMRC estimates the new framework could generate up to £315 million in additional tax revenue by 2030.

Duca also warned that the cost of compliance could be passed on to users, particularly as exchanges invest in systems to ensure data accuracy and regulatory alignment.

Retail users face higher audit risk, not new taxes

For individual investors, CARF does not introduce new taxes but significantly raises the likelihood of audits and enforcement.

A UK-based crypto tax practitioner known as The Bitcoin & Crypto Accountant told Cointelegraph that from 2026, HMRC will receive standardized data directly from exchanges, including overseas platforms, making discrepancies between tax returns and exchange records far easier to detect.

Common issues, he said, often stem from omissions rather than deliberate evasion, such as unreported offshore exchange activity, frequent small trades assumed to be immaterial, or misreported decentralized finance (DeFi) and non-fungible token (NFT) transactions.

Tax specialists warn that historical data may also come under scrutiny once reporting begins, urging users with unresolved tax positions to act early while voluntary disclosure options remain available.

DeFi taxation still under review

While CARF focuses on centralized reporting, the taxation of DeFi activities remains a complex and evolving area. Under current UK rules, many DeFi transactions, including token swaps, staking rewards, and liquidity provision, are taxable when they occur.

Duca noted that a single DeFi strategy can trigger multiple tax events, potentially involving capital gains and income tax at different stages. The UK government is currently consulting on a possible “no gain, no loss” approach for DeFi deposits, which could defer certain tax liabilities until assets are disposed of. However, he stressed that existing rules still apply for the 2024–25 tax year.

Offshore platforms and self-custody offer no safe harbor

Experts caution that using non-UK or offshore platforms does not remove reporting obligations. If a provider operates in a CARF-adopting jurisdiction, user data may still be shared with HMRC through international agreements. Even activity on platforms outside the framework remains legally reportable.

With more than 70 jurisdictions now committed to CARF, global alignment on crypto tax reporting is accelerating. While some users may seek noncompliant alternatives in the short term, analysts expect international norms to gradually close remaining loopholes.

As tax authorities gain clearer visibility into crypto markets, the message to users and platforms alike is becoming harder to ignore: transparency is no longer optional, and preparation ahead of 2026 may prove critical.