Crypto Wash Sale Rules

The crypto wash sale rules question is whether the 30-day repurchase restriction on wash sales applies to cryptocurrency. The IRS has not explicitly ruled, creating ambiguity for crypto traders managing tax losses.

The wash-sale rule and its original scope

The wash-sale rule, codified in IRC Section 1091, prohibits a taxpayer from deducting a loss on a stock or bond if they repurchase the same security within 30 days before or after the sale. The purpose is to prevent “loss harvesting” (realizing a loss for a deduction) while maintaining economic exposure (immediately buying back). If you sell 100 shares of Apple at a $10,000 loss and buy 100 shares back within 30 days, the loss is disallowed and added to your cost basis in the new purchase.

The rule is mechanical: it does not depend on intent. You can accidentally trigger it by selling for tax purposes and immediately buying back to keep your position. The rule applies to direct repurchases (buying the identical stock) and to “substantially identical” securities—most practitioners interpret this to mean the same company’s stock, though close substitutes (preferred shares, derivatives) are contested.

The statute and cryptocurrency silence

IRC Section 1091 specifies “stocks and securities.” The statute does not explicitly list cryptocurrency; it was enacted in 1932, long before digital currencies existed. The question then becomes whether crypto assets are “securities” within the meaning of the tax code. The answer hinges on whether crypto is classified as a capital asset (subject to Section 1091) or property or a commodity (exempt from Section 1091).

The IRS Notice 2014-21 states that cryptocurrency is property for federal income tax purposes. Property owners can realize gains and losses. But does “property” status mean that Section 1091 applies? The statute refers to “securities,” a narrower class. The IRS has not issued guidance explicitly applying or exempting wash-sale rules from crypto.

Practitioner interpretations and divergent risk profiles

Most tax professionals assume the wash-sale rule applies to crypto as a precaution, even in the absence of explicit IRS ruling. The reasoning is that crypto assets are property, and losses on property sales are subject to limitations in the tax code. If the IRS were to challenge a claimed loss on a crypto sale followed by a 15-day repurchase, it could invoke the wash-sale rule (or similar substance-over-form arguments) to disallow the loss. The burden would then be on the taxpayer to litigate, incurring legal costs.

A minority of practitioners argue that wash-sale rules do not apply to crypto because Section 1091 specifies “securities,” and crypto is property, not a security. Under this view, a trader could sell Bitcoin at a loss and immediately buy it back to harvest the loss deduction. This interpretation is more aggressive and carries audit risk; the IRS could challenge it and the practitioner views it as uncertain at best.

Tax-loss harvesting in crypto

Many crypto investors practice tax-loss harvesting by selling losing positions in down markets to lock in losses for deductions, then buying them back or buying similar assets. A trader holding Bitcoin that has fallen 40% from purchase might sell it, realize a large loss, and immediately purchase Ethereum (a different asset, not “substantially identical” to Bitcoin). This appears to circumvent the wash-sale rule because Ethereum is a different asset.

However, if the IRS were to challenge this and argue that Bitcoin and Ethereum are “substantially identical” (e.g., both are cryptocurrencies with correlated price movements), the loss could be disallowed. The phrase “substantially identical” is not defined in the statute and is interpreted narrowly by courts in equity cases (where two stocks are nearly identical) and broadly in substance-over-form cases (where the economic exposure is the same). The IRS has not ruled on whether different cryptocurrencies are substantially identical for wash-sale purposes.

Safe harbor strategy and documentation

To avoid audit risk, many tax advisors recommend waiting 31 days after selling a crypto asset before repurchasing it or a closely correlated asset. This is the safe harbor approach. A trader might sell a losing Bitcoin position, wait 31 days, then buy Bitcoin back at the same or different price. The 31-day waiting period is copied directly from the equity wash-sale rule and is an accepted convention.

For documentation, keep detailed records of all sales and repurchases with dates, amounts, and prices. If audited, the IRS will compare sales and subsequent purchases to identify potential wash-sale violations. If there is a 45-day gap between the sale and repurchase, you are safe. If there is a 5-day gap, the IRS may question whether the loss should be disallowed. Crypto exchange records and blockchain transaction histories provide timestamped evidence; compile these proactively.

Cross-asset wash-sale complexity

The question becomes murkier when different cryptocurrencies are involved. Suppose a trader sells Bitcoin at a loss, waits 15 days, and buys Ethereum. Are they “substantially identical”? Arguments for substantial identity include: both are cryptocurrencies, both are volatile, both are exposed to similar regulatory and adoption risk. Arguments against: they are different cryptocurrencies, with different use cases and price correlations. An Ethereum position does not perfectly replicate the economic exposure of a Bitcoin position.

The IRS has not ruled on this. Prudent advisors recommend either: (a) waiting 31 days before repurchasing any cryptocurrency after a loss sale, or (b) purchasing a different asset class (e.g., a crypto fund rather than the individual token) with a longer time horizon to reduce audit risk. Some traders use a “rotation” strategy, selling one losing crypto and buying another uncorrelated crypto (e.g., selling Bitcoin, buying a governance token), to reduce economic identity concerns, though this provides no legal protection.

Staking and mining: additional complications

Earning staking rewards or mining income in cryptocurrency is taxable income, treated separately from capital gains or losses. A trader who sells a crypto asset at a loss and then earns staking rewards is in a different position than simply buying the asset back. Staking rewards are new income, not a continuation of the prior position. However, if the staking validator or mining pool is the same asset (e.g., staking Ethereum after selling Ethereum), the IRS might argue that the economic exposure is substantially the same and the wash-sale rule applies.

Documentation here is critical. If you sell Ethereum and earn Ethereum staking rewards within 30 days, the staking income is taxable, and the question is whether the staking position violates wash-sale rules. Keeping separate records—sale date, staking start date, rewards earned—allows you to demonstrate that the staking is a separate transaction from the sale and repurchase.

IRS guidance and future resolution

As of 2024, the IRS has not issued specific guidance on wash-sale rules and cryptocurrency. The agency is aware of the question, and practitioners have submitted comment letters on wash-sale treatment in virtual currency transactions. A formal ruling or notice is possible, but the IRS is slow to issue guidance on crypto matters. Until a ruling is issued, taxpayers must make a judgment call: assume wash-sale rules apply (conservative) or assume they do not (aggressive). The conservative approach is safer for audit purposes.

Some members of Congress have proposed legislation to clarify that wash-sale rules apply to crypto. Such legislation has not passed, but it signals that lawmakers view crypto as property subject to similar restrictions as securities. If the law is clarified, it will almost certainly apply wash-sale rules retroactively to prior years, potentially triggering adjusted assessments and penalties for prior returns claiming losses on crypto positions within 30 days of repurchase.