Wash Sale Rule (Crypto)
The Wash Sale Rule is an IRS provision under IRC Section 1091 that disallows a capital loss deduction when a taxpayer sells a security at a loss and repurchases a substantially identical security within 30 days before or after the sale — a rule that currently applies to stocks and bonds but, as of current law, does not apply to cryptocurrency, creating a planning opportunity unique to digital assets.
The wash sale rule was enacted to prevent taxpayers from manufacturing tax losses without meaningfully changing their economic position. Under IRC Section 1091, if you sell a stock or mutual fund at a loss and buy back the same or a substantially identical security within the 30-day window on either side of the sale (a 61-day window in total), the loss is disallowed. The disallowed loss is not permanently lost — it is added to the cost basis of the repurchased shares — but the timing benefit of claiming the deduction in the current tax year is eliminated.
The pivotal distinction for cryptocurrency investors is that the IRS classifies digital assets as property under Notice 2014-21, not as securities. Because Section 1091 specifically applies to stocks, bonds, and other securities, the wash sale rule does not currently extend to cryptocurrency. This means a crypto investor who sells Bitcoin at a loss can immediately repurchase the same amount of Bitcoin, claim the capital loss on their return, and maintain the same market exposure without any waiting period.
This gap has generated significant attention in Congress. The Build Back Better Act, passed by the House in 2021, included a provision extending wash sale rules to digital assets, but it did not advance through the Senate. Subsequent legislative proposals have repeatedly included similar provisions. Taxpayers relying on the crypto wash sale exception should monitor legislative developments, as the gap could be closed retroactively to the beginning of a tax year in which legislation is enacted.
Tax-loss harvesting in crypto is therefore substantially more powerful than in equities. A crypto investor sitting on losses can sell depressed positions to realize losses, reinvest immediately in the same asset, and reset their cost basis — generating a deduction that can offset capital gains from other sources or, subject to the $3,000 annual cap, ordinary income. Carried-forward capital losses are available indefinitely under IRC Section 1212.
Investors must still be careful about related-party transactions, sham transactions, and potential IRS challenges based on economic substance doctrine. Swapping one cryptocurrency for a highly correlated but technically distinct asset — for example, selling Ethereum and buying a wrapped version — may not qualify as a wash sale avoidance strategy if the IRS later rules those assets are substantially identical. Prudent taxpayers should consult a tax professional before executing aggressive loss-harvesting strategies in digital assets.