Crypto Wash Sale Rules

The wash sale rule lives in Section 1091 of the tax code, and its trigger words are "stock or securities." Sell a security at a loss, buy a substantially identical one within 30 days before or after, and the loss is disallowed; it gets folded into the basis of the replacement shares instead.

Crypto never made it into that sentence. IRS Notice 2014-21 classified virtual currency as property for federal tax purposes, and later guidance has kept that classification. Property is not "stock or securities," so a loss on a direct crypto sale is not disallowed by Section 1091 even if you repurchase the identical coin the same afternoon.

So the honest framing is this: crypto tax-loss harvesting without a 30-day wait is a real, currently-legal planning tool, and it is also a tool with an expiration risk that nobody can date for you. Use it while it exists. Do not architect your whole tax life around it surviving.

Tax-loss harvesting means selling a position that is worth less than you paid so the paper loss becomes a deductible capital loss, then redeploying the cash. In a stock account, rebuying the same ticker inside 30 days kills the loss. In direct crypto, under current law, it does not. Here is the arithmetic on a realistic scale.

Where the harvested loss lands depends on the rest of your capital gains picture, which is its own planning topic. Our guide to capital gains tax planning covers the rate brackets and netting rules, and the capital gains tax calculator lets you test your own numbers before you sell anything.

The property classification only protects the coin itself. The moment your crypto exposure is wrapped in a security, the ordinary wash sale rule is back in force, and this is where harvesters get sloppy.

• Crypto-related stocks: shares of a crypto exchange, a bitcoin miner, or a company holding bitcoin on its balance sheet are ordinary corporate stock. Sell at a loss and rebuy within 30 days, and the loss is disallowed.
• Crypto futures ETFs: the fund shares are securities; the wash sale rule applies to the shares you trade, regardless of what the fund holds underneath.
• Spot bitcoin and ether ETPs: the technically interesting case. These are grantor trusts, and there is a genuine argument that shareholders own the underlying coin, which is property. In practice, brokers report these shares on Form 1099-B and apply wash sale adjustments like any other security. Plan around the broker treatment, not the law review article.

One more boundary worth naming: nothing in current law stops you from selling coin at a loss and buying an ETP, or vice versa, but the "substantially identical" question has no crypto-specific guidance, and mixing the two inside a 30-day window when the LOSS side was a security is asking for a fight. When the loss leg is a security, respect the full 30-day rule.

The wash sale rule is not the only doctrine in the building. Section 7701(o) codifies the economic substance doctrine: a transaction only counts if it meaningfully changes your economic position apart from the tax benefit, and you had a substantial non-tax purpose for it.

An instantaneous sell-and-rebuy of the identical coin, executed only to book the loss, is the kind of circular transaction that doctrine was written about. Here is the honest state of play: there is no crypto-specific authority disallowing an investor's instant harvest, the doctrine's application to individuals is generally limited to transactions connected with a trade or business, and the IRS has not, to date, run an enforcement campaign against retail crypto harvesting. It is also true that penalties for transactions found to lack economic substance are severe, with a strict-liability accuracy penalty of 20 percent, or 40 percent if undisclosed.

The practical hygiene is cheap: sell into the open market rather than to a related party, avoid any pre-arranged repurchase, and let real market risk exist between the legs. In crypto, even a short interval carries genuine price exposure, which is the economic substance argument working in your favor. A same-second, fee-free, round-trip with yourself on both sides is a different animal from a market sale followed by a market rebuy.

Harvesting only works if your basis records survive contact with the IRS, and the reporting environment changed hard. Custodial brokers now report gross proceeds from digital asset sales on Form 1099-DA for transactions occurring on or after January 1, 2025. For covered digital assets acquired in a broker account on or after January 1, 2026, brokers must also report cost basis.

The quieter change matters just as much: universal cost basis accounting is dead. Since January 1, 2025, basis methods apply wallet by wallet and account by account, not across your whole crypto life as one pool. Rev. Proc. 2024-28 gave taxpayers a one-time safe harbor to allocate their unused basis across wallets as of that date, an allocation that is irrevocable and has to be backed by records showing each unit's original cost and acquisition date.

For a harvester, the implications are direct. The IRS increasingly sees your proceeds whether you report cleanly or not. Your loss math has to be computed per wallet. And if you want to sell your highest-basis units rather than whatever a default method picks, that specific identification has to be documented by the time of the sale, not reconstructed in March.

1. Inventory your lots, wallet by wallet. Every unit with its acquisition date and basis, organized per wallet and per exchange account, because that is how the rules now measure you.
2. Pick the harvest lots by specific identification. Highest-basis lots generate the biggest losses. Document which units you are selling no later than the sale itself.
3. Execute the sale, then the rebuy. Real market orders, real exposure between the legs, and eyes open about fees and spread on both trades.
4. Apply the loss. Net against gains first, then up to $3,000 against ordinary income, then carry the remainder forward and track it.
5. Reconcile to the 1099-DA in January. Expect broker forms, and expect the IRS to match them. Your records should agree with the forms or explain the difference.

Harvesting is one lever among several. If the broader goal is cutting this year's bill, our guide to how to reduce taxable income walks the full stack of options in priority order.

Three things get glossed over in most crypto harvesting content, and they belong in your math.

The round trip is not free. Trading fees, bid-ask spread, and slippage hit both legs. On a large position in a thin market, the friction can eat a meaningful slice of the tax benefit. Price the trade before you celebrate the deduction.

It is deferral, not disappearance. Your rebuy resets basis lower and restarts the holding period, so the harvested loss comes back as future gain, potentially short-term gain, when you eventually sell. Deferral has real value, especially when you control the timing of the future sale, but it is a different product than tax that vanished.

The rule can change. The wash sale gap for crypto has survived several attempts to close it, and two proposals were live in Congress within the past year, one of which, as drafted, would reach tax years beginning after 2025. Plan with the rule as it stands, keep receipts, and hold the strategy loosely. If your financial plan only works while a known loophole stays open, it is not a plan; it is a bet on Congress staying distracted.