Crypto Wash Sale Loophole Calculator

Crypto (property) vs stock (security) — side by side

If the loophole closes: repurchase-timing scenarios

Same loss, same tax rate — only how soon you could deduct it changes. This models what happens to the same crypto position if wash-sale-style rules were extended to digital assets.

Why this loophole exists — and why it might not last

The wash sale rule (IRC §1091) was written for "stock or securities" decades before crypto existed. It disallows a tax loss if you sell at a loss and buy the same or a substantially identical security back within 30 days before or after the sale — the loss isn't gone, it's added to the replacement shares' cost basis and deferred until you eventually sell without triggering the rule again. The IRS has classified cryptocurrency as property (Notice 2014-21), not a security, so §1091's text simply doesn't reach it. The practical result: a crypto holder can sell at a loss and buy the identical coin back one second later, keep the exact same position, and still claim the loss on this year's return.

Congress has tried to close this gap repeatedly — it appeared in the 2021 Build Back Better bill and in multiple budget proposals since — and every attempt has stalled. That history matters for how you should treat this calculator's numbers: the tax savings shown for the "crypto" column are real under current law, but they are not guaranteed to stay available. If a future law does extend wash-sale treatment to digital assets, it could apply prospectively (only to trades after enactment) or, in a harsher version, retroactively disallow losses claimed in anticipation of the change — which is exactly the legislative risk the "if it closes" table above is trying to make concrete rather than abstract.

There's a second, separate risk that has nothing to do with future legislation: the IRS's general anti-abuse doctrines, including the step transaction doctrine, exist to disregard a series of transactions that have no economic substance beyond generating a tax benefit. Routine, modest-frequency tax-loss harvesting on a long-term holding has not been successfully challenged this way. Extremely high-frequency same-day round-trips with no other rationale sit closer to that line. None of this is tax advice — the numbers here are for planning conversations with a crypto-literate CPA, not a substitute for one.

FAQ

Does the wash sale rule apply to crypto in 2026?

No, not under current US law. IRC Section 1091 (the wash sale rule) applies to stocks and securities. The IRS treats cryptocurrency as property under Notice 2014-21, not as a security, so the 30-day wash sale window that disallows a loss on stocks does not reach crypto. You can sell a coin at a loss and buy it back immediately -- even the same second -- and still claim the loss on your taxes. Congress has proposed closing this loophole multiple times (including in the 2021 Build Back Better bill), but no law has passed as of 2026.

Is the crypto wash sale loophole risky to use?

The core mechanic is legal under current law, but two risks are worth understanding. First, legislative risk: a future law could apply wash sale rules to digital assets, possibly with an effective date that catches trades made in anticipation of the change -- this has been proposed in multiple budget bills. Second, the IRS's general anti-abuse doctrines (like the step transaction doctrine) exist to disregard transactions that have no purpose other than generating a tax loss; while this hasn't been successfully applied to routine crypto tax-loss harvesting, it is not a zero-risk strategy for aggressive, high-frequency harvesting with no other economic rationale. This calculator is not tax advice -- talk to a crypto-literate CPA before relying on this for a real filing.

How is this different from harvesting losses on stocks?

On stocks, if you sell at a loss and buy back the same or a substantially identical security within 30 days before or after the sale, the loss is disallowed for that tax year -- it isn't gone, it's added to the cost basis of the replacement shares and only recognized when you eventually sell without triggering the rule again. That means stock investors either wait out the 31-day window (staying out of the position and exposed to price risk) or give up the immediate deduction. Crypto investors can repurchase the identical asset instantly, keep the position fully intact, and still claim the loss in the current tax year -- no waiting, no disallowed-loss carryforward, no market-timing risk from sitting in cash.