Chainalysis: $457B in Taxable Crypto Activity, CARF Catches Only 14%

Blockchain analytics firm Chainalysis has estimated that potentially taxable onchain crypto activity reached at least $457 billion globally in 2025, with the United States accounting for $112.6 billion of that total. North America led all regions at $134.6 billion, followed closely by the European Union at $125.1 billion. The estimates, drawn from six major blockchains, include realized gains, income from mining, staking and lending, and crypto-denominated payments, though they exclude trading activity on centralized exchanges.

Despite the scale of taxable crypto transactions, the OECD's Crypto-Asset Reporting Framework (CARF) covers just 14% of the onchain activity Chainalysis identified. The remaining 86% flows through decentralized exchanges, peer-to-peer transfers, onchain income streams and direct crypto payments — channels largely invisible to existing international reporting rules. CARF, developed by the OECD in 2022, relies on crypto intermediaries to collect and share customer transaction data with tax authorities, a structure that inherently excludes decentralized finance where no custodial operator exists.

CARF data collection officially began on January 1, 2026, across 48 jurisdictions including the UK and EU member states. Covered crypto platforms are now required to gather customer tax residency information and report transaction data domestically for cross-border exchange. Colby Mangels, a former OECD adviser who helped shape CARF, explained that the framework was intentionally built around businesses that facilitate crypto transactions as intermediaries, leaving most DeFi activity outside its reporting perimeter.

Regulators may eventually close that gap. According to Mangels, tax authorities are closely tracking anti-money laundering rulemaking, particularly efforts to classify certain DeFi platforms or their operators as regulated crypto service providers. Until then, the vast majority of taxable onchain crypto activity will continue to fall outside international reporting frameworks, posing a growing challenge for governments seeking to capture revenue from the digital asset economy.