US Crypto Tax-Loss Harvesting: Capital Loss and Wash-Sale Rules

Tax-loss harvesting converts an unrealized decline into a reportable loss through a real disposition. The loss can reduce capital gains, but the wash-sale analysis depends on whether the digital asset is stock or a security under section 1091—not merely whether it is called crypto.

Reviewed September 1, 2026. This guide addresses federal treatment for individual investors. Tokenized securities, derivatives, business assets, related parties, retirement accounts and states can require additional rules.

What tax-loss harvesting actually changes

An unrealized loss has no current capital-loss effect. Selling, exchanging or otherwise disposing of the investment closes the position for tax purposes. Capital proceeds are compared with adjusted basis; the resulting loss enters Form 8949 and Schedule D.

Harvesting changes timing, not economic history. Rebuying creates a new position with a new basis and holding period. A current tax reduction can therefore be followed by a larger future gain if the replacement asset recovers.

A market decline alone is not deductible

The IRS requires a closed and completed transaction fixed by an identifiable event. Chief Counsel Memorandum 202302011 concludes that cryptocurrency that merely declined substantially, retained value and was not abandoned or disposed of did not generate a section 165 loss.

A transfer between wallets owned by the same taxpayer is not a sale. A sham, circular or self-directed entry that leaves ownership unchanged should not be treated as a disposition. Preserve actual execution, counterparty, proceeds and fees.

Capital losses follow short- and long-term netting

Short-term losses first net within the short-term category and long-term losses within the long-term category. The category results are then netted. A net capital loss can reduce other income only up to $3,000 per year, or $1,500 for married filing separately; unused loss carries forward.

IRS Topic 409 confirms the limit. The value of harvesting depends on which gain is offset: eliminating a high-rate short-term gain can differ from offsetting a long-term gain. Use the US crypto loss guide for carryovers.

Section 1091 covers stock or securities

The current text of 26 USC section 1091 disallows a loss when substantially identical stock or securities are acquired within the 61-day window beginning 30 days before and ending 30 days after the loss sale. It does not say that all property is subject to the rule.

Ordinary cryptocurrency treated as property but not stock or a security generally falls outside section 1091 under current law. But a digital asset can also be a tokenized stock, debt instrument or other security. The final broker regulations and Form 1099-DA rules expressly account for wash sales of tokenized securities that are stock or securities for section 1091.

A blog claiming either “wash sales apply to every crypto” or “wash sales never apply to crypto” is therefore wrong.

Immediate repurchase is not a universal safe harbor

For non-security spot crypto outside section 1091, an immediate market sale and repurchase can still produce a recognised loss under current law. That is not a guarantee for every structure. Confirm asset classification and ensure the sale is genuine.

• tokenized securities can fall directly within section 1091;
• options, funds, derivatives and wrapped rights can have separate rules;
• sales to related parties can trigger section 267 limitations;
• retirement-account acquisitions can create special consequences for stock or securities;
• transactions lacking economic substance or real transfer can be challenged;
• Congress can change future law, but proposals are not current law.

Rebuying lowers or resets basis

If section 1091 does not disallow the loss, replacement crypto generally takes its actual new purchase cost as basis and starts a new holding period. The current loss is real, but more gain can arise later because the new basis is lower.

If section 1091 does apply to a tokenized security, the disallowed loss generally adjusts basis in the replacement units and defers rather than permanently erases the loss, subject to special cases. Do not apply the spot-crypto workflow to a security token.

Choose lots before execution

Different lots can have different basis and holding periods. Adequate identification should be made in accordance with current wallet- or account-level rules and supported before or at disposition. A year-end report that selects the highest basis after execution may not establish valid identification.

Review both loss size and holding-period effects. Selling a lot one day before it becomes long-term can change the character of later gains after repurchase. The US capital-gains guide explains lots and holding periods.

Fees and slippage reduce the economic benefit

Eligible acquisition and disposition costs affect basis or amount realised. Network fees paid in another crypto asset can create a separate disposal. Slippage, spreads, withdrawal costs and time out of market can exceed the tax value of a small loss.

Compare present tax reduction with transaction cost and the future gain created by lower basis. “Tax saved” without the future basis effect is incomplete.

Harvesting records

• asset classification and why section 1091 does or does not apply;
• specific lot, acquisition date and adjusted basis;
• sale timestamp, units, proceeds and fees;
• replacement purchase and new holding period;
• short- and long-term netting worksheet;
• capital-loss carryover reconciliation;
• Form 8949 and broker-statement adjustments.

Use the Form 8949 guide and retain source files, not only a dashboard screenshot.

US crypto loss-harvesting FAQ

Disclaimer: This article is for general informational purposes only and does not constitute tax advice. For individual tax advice, consult a licensed tax professional.