Global on-chain cryptocurrency activity potentially subject to taxation reached at least $457 billion in 2025, according to a new analysis from blockchain intelligence firm Chainalysis.
The study examined activity across Bitcoin, Ethereum, Solana, Tron, BNB Smart Chain and Base, covering several categories that could create taxable events depending on local laws.
These included crypto gains, mining and staking income, lending, gambling activity and crypto-powered payments. The report highlights how the growth of digital assets is creating an increasingly significant tax base for governments worldwide.
However, Chainalysis stressed that the $457 billion figure should be considered a lower-bound estimate rather than a complete measurement of global taxable crypto activity.
US Leads Global Crypto Tax Activity
The United States accounted for approximately $112.6 billion of the activity identified by Chainalysis, making it the largest individual market included in the report.
At the regional level, North America led with $134.6 billion, followed closely by the European Union with $125.1 billion.
East Asia ranked third with approximately $54.7 billion in potentially taxable on-chain crypto activity.
The figures demonstrate that crypto taxation is becoming increasingly relevant not only in major digital asset markets but also in countries where blockchain activity represents a meaningful amount compared with government revenues and budget deficits.
Portugal provides one notable example. Chainalysis estimated the country generated approximately $2 billion in taxable crypto activity during 2025, equivalent to 201% of its roughly $1 billion government deficit that year.
In Nigeria, meanwhile, approximately $4.4 billion in taxable crypto activity represented 12.3% of the country's $35.5 billion in government revenue.
$457 Billion Is Only a Lower Estimate
Chainalysis cautioned that its methodology does not capture the entire cryptocurrency ecosystem.
The analysis excludes centralized exchange activity, despite these platforms accounting for a substantial portion of global crypto trading. It also does not cover every blockchain network or every category of transaction that could potentially create a taxable event.
As a result, the true amount of global crypto activity subject to taxation could be significantly higher than $457 billion.
The findings arrive as governments worldwide strengthen their ability to identify and tax digital asset transactions.
For years, tax authorities have faced difficulties tracking activity spread across centralized exchanges, decentralized protocols, self-custody wallets and peer-to-peer transactions. International reporting standards are now attempting to close some of those gaps.
CARF Expands Global Crypto Tax Reporting
A major part of that effort is the OECD's Crypto-Asset Reporting Framework, or CARF, which establishes a standardized system for exchanging information about crypto transactions between participating jurisdictions.
Under CARF, covered crypto service providers will be required to collect and report customer transaction information to tax authorities. Dozens of jurisdictions are expected to begin exchanging this information in 2027.
The system could make it considerably easier for governments to identify cross-border cryptocurrency holdings and taxable transactions, particularly when investors use regulated intermediaries located outside their home countries.
Several governments have already begun adjusting domestic rules and reporting systems in preparation for the international framework.
Most On-Chain Activity Falls Outside CARF
Despite the expansion of international reporting, Chainalysis found a substantial gap between the activity covered by CARF and the broader on-chain economy.
Only 14% of the potentially taxable on-chain activity analyzed by Chainalysis involved events covered by CARF.
The remaining 86% fell outside that scope, including decentralized exchange transactions, peer-to-peer transfers, on-chain income and cryptocurrency payments.
That gap highlights one of the biggest challenges facing tax authorities as crypto becomes increasingly decentralized. Reporting rules focused primarily on intermediaries may provide greater visibility into centralized platforms while leaving substantial activity occurring directly between wallets and decentralized protocols more difficult to monitor.
Chainalysis' findings suggest crypto taxation is therefore becoming a much larger issue for governments. With at least $457 billion in potentially taxable activity recorded across only a selection of blockchains and transaction types, authorities have strong incentives to improve both domestic enforcement and international information sharing.
As CARF implementation approaches, 2027 could become an important turning point for global crypto tax transparency, even if large parts of the on-chain economy remain outside its direct reporting requirements.
