Chainalysis has estimated that potentially taxable onchain crypto activity exceeded $457 billion worldwide in 2025, while transactions within the practical reach of international reporting rules represented only 14% of the total.
$457 Billion in Potentially Taxable Activity
Chainalysis said in an Aug. 26 crypto tax report that the other 86% included decentralized exchange activity, peer-to-peer transfers, onchain income and crypto payments that fall outside the practical scope of the OECD's Crypto-Asset Reporting Framework. The analytics firm examined realized gains, income, and payments across Bitcoin, Ethereum, Solana, Tron, BNB Smart Chain, and Base. Activity recorded inside centralized exchanges was excluded because trades conducted within their internal systems do not appear on public blockchains.
At $112.6 billion, the United States generated the largest amount of any country. Chainalysis divided the US figure into $64.6 billion in payments, $30.1 billion in gains, and $17.9 billion in income. North America ranked first among regions with $134.6 billion, ahead of the European Union at $125.1 billion and East Asia at $54.7 billion. Germany followed the US with $24.1 billion, while China accounted for $21 billion. The findings build on Chainalysis's broader work tracking illicit crypto activity, as seen in its recent identification of 7,700 suspect accounts in a separate investigation.
CARF Captures Only 14% of Onchain Activity
The Crypto-Asset Reporting Framework, developed by the OECD in 2022, creates a system for participating tax authorities to exchange information about crypto transactions across national borders. Reporting Crypto-Asset Service Providers, a category that largely covers centralized exchanges and brokers, must collect customer details and submit transaction data to authorities. Data collection started on Jan. 1, 2026, in 48 jurisdictions.
Even within that structure, CARF-covered events represented just 14% of the potentially taxable onchain activity. DeFi and private wallets leave transaction histories incomplete because decentralized exchanges may operate through smart contracts without a central custodian. The compliance gap mirrors challenges seen in exchange-level enforcement, such as the Kraken dust transfer incident that exposed the limits of transaction monitoring.
DeFi and Private Wallets Create Reporting Gaps
Cost basis presents a separate problem. When a customer acquires crypto on one platform and later sends it elsewhere for sale, the receiving exchange may know the proceeds but not the original purchase price. Historical records can remain missing because CARF does not apply retroactively. Aggregate reports may also lack the transaction-level detail required to rebuild a complete sequence of wallet activity.
South Korea has said its planned 22% crypto tax will cover income from private wallets and exchanges when the regime starts on Jan. 1, 2027. U.S. custodial brokers began filing Form 1099-DA for customer disposals made during the 2025 tax year. Gross proceeds are reported first, while cost-basis reporting phases in for covered transactions made in 2026. According to Chainalysis, the US crypto tax gap was estimated at roughly $50 billion annually in 2022.
