How the IRS Classifies Digital Assets

The Property Framework

The IRS's approach to digital assets begins with a single, foundational determination: cryptocurrency is property, not currency. IRS Notice 2014-21 established this classification, and every reporting obligation, gain calculation, and enforcement action flows from that decision.

Under Notice 2014-21, "virtual currency" is treated as property for federal tax purposes. General tax principles applicable to property transactions apply. This means that every time a taxpayer disposes of cryptocurrency — whether selling for cash, exchanging for another token, or using it to buy a cup of coffee — they have engaged in a taxable disposition of property and must calculate gain or loss.

Practitioners accustomed to advising clients on stock sales will find the conceptual framework familiar. The same principles that govern the sale of IBM shares govern the sale of Bitcoin. Gain equals the amount realized minus the adjusted basis. Holding period determines whether the gain is short-term or long-term. Losses are subject to the same netting rules and the same $3,000 annual deduction limit against ordinary income.

But the practical reality is far more complex than stock transactions, because cryptocurrency moves faster, trades on more platforms, and generates taxable events in contexts that have no analog in traditional securities markets.

From Virtual Currency to Digital Assets

Notice 2014-21 used the term "virtual currency." The Infrastructure Investment and Jobs Act of 2021 (IIJA) introduced the broader term "digital asset," defined under IRC §6045(g)(3)(D) as any digital representation of value recorded on a cryptographically secured distributed ledger or any similar technology. This definition is deliberately expansive. It covers Bitcoin and Ethereum, but it also encompasses stablecoins, wrapped tokens, certain NFTs, and governance tokens issued by DeFi protocols.

The IIJA's definition matters because it determines what falls within the new broker reporting requirements. Beginning with tax year 2025 (with phased implementation), "brokers" — a term the statute defines to include centralized exchanges, and which proposed Treasury regulations controversially extended to certain DeFi front-ends — must file Form 1099-DA reporting gross proceeds from digital asset sales.

Form 1099-DA is the digital asset equivalent of Form 1099-B. It requires brokers to report the customer's name, address, gross proceeds, and — when available — adjusted cost basis. The phased rollout means that for tax year 2025, brokers must report gross proceeds. Cost basis reporting is required for assets acquired on or after January 1, 2026.

Rev. Rul. 2019-24: Hard Forks and Airdrops

Revenue Ruling 2019-24 addressed two questions that had bedeviled practitioners since the Bitcoin Cash hard fork in August 2017:

Hard forks resulting in an airdrop: When a cryptocurrency undergoes a hard fork and the taxpayer receives new units of cryptocurrency (an "airdrop"), the taxpayer has ordinary income equal to the fair market value of the new cryptocurrency at the time the taxpayer obtains dominion and control over it. The basis in the new cryptocurrency equals the amount included in income.

Hard forks without an airdrop: If a hard fork does not result in the taxpayer receiving new cryptocurrency — perhaps the exchange they use does not support the new chain — there is no taxable event.

The key phrase is "dominion and control." A taxpayer who holds Bitcoin in a self-custody wallet when Bitcoin Cash forks has dominion and control the moment the fork occurs — they hold the private keys to both chains. A taxpayer whose Bitcoin sits on Coinbase has dominion and control only when Coinbase credits the new tokens to their account and allows withdrawal.

Practitioner Tip: Many clients received airdropped tokens in 2020-2022 that they never claimed or even knew about. If the tokens sat in an unclaimed state in a smart contract, the taxpayer arguably did not have dominion and control. But if the tokens appeared in their wallet automatically, income was realized at that moment — even if the client never checked their wallet and had no idea the tokens existed.

The Form 1040 Digital Asset Question

Since tax year 2022, Form 1040 has included a mandatory yes/no question about digital asset transactions: "At any time during [tax year], did you: (a) receive (as a reward, award, or payment for property or services); or (b) sell, exchange, gift, or otherwise dispose of a digital asset (or a financial interest in a digital asset)?"

Answering "No" when the correct answer is "Yes" constitutes a false statement on a federal tax return. The IRS has positioned this question prominently — it appears near the top of Form 1040, before the income section — to ensure taxpayers cannot claim ignorance.

Advise clients that simply holding digital assets without any transactions during the year requires a "No" answer. But any disposition, receipt of staking rewards, mining income, airdrop receipt, or payment in cryptocurrency triggers a "Yes" answer and corresponding reporting obligations.

Stablecoins: Property That Behaves Like Currency

Stablecoins — tokens pegged to the U.S. dollar (USDC, USDT, DAI, BUSD) — illustrate the tension between the property classification and economic reality. Functionally, stablecoins behave like digital dollars. But legally, they are property, and every disposition triggers gain or loss calculation.

In practice, stablecoin transactions rarely produce significant gains or losses because the peg maintains a value near $1.00. But they can: if a client purchases USDC at $1.00 and later sells it at $0.998 (as occurred during brief de-peg events), the loss is technically reportable. If a client earns interest on USDC and later receives a stablecoin that has appreciated slightly above the peg, the gain is technically reportable.

The reporting burden is disproportionate to the economic reality. A DeFi user who swaps USDC to USDT (two dollar-pegged stablecoins) to access a specific liquidity pool has technically disposed of property and must calculate gain or loss, even though the economic substance of the transaction is exchanging one digital dollar for another.

Practitioner Tip: While the theoretical gain or loss on stablecoin transactions is usually negligible, the transactions must still be reported on Form 8949 if they constitute dispositions. Some practitioners aggregate de minimis stablecoin transactions and report them in a single line on Form 8949, noting "various stablecoin conversions" with net near-zero gain/loss. The IRS has not addressed whether this aggregation is acceptable, but it is a common practical approach.

The Broker Definition Controversy

The IIJA's broker reporting provisions generated intense controversy when Treasury proposed regulations that would extend the "broker" definition beyond centralized exchanges to include DeFi front-end operators — the developers and operators of websites and applications that facilitate access to decentralized protocols. Under this broad definition, a developer who creates a user interface for Uniswap could be classified as a broker required to collect customer information and file Form 1099-DA.

The DeFi industry objected that decentralized protocols cannot perform know-your-customer (KYC) verification by design, and that requiring front-end operators to act as brokers would drive DeFi development offshore. Final regulations narrowed the scope somewhat, but the definition remains broader than many in the industry expected. Practitioners should monitor implementation carefully, as the scope of 1099-DA reporting will directly affect which client transactions are reported to the IRS and which require self-reporting.