Investing · Guide

Tax-loss harvesting in crypto: how it works and why it matters

Tax-loss harvesting is realizing losses to offset gains. Crypto tax rules vary by jurisdiction — US, UK, and Australia treat wash-sale and short-interval repurchase very differently. Jurisdiction-specific breakdown.

By Eric Nkando, senior writer · 5 min read · Updated 8 Oct 2026

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Tax-loss harvesting is the practice of selling an investment at a loss to realize that loss for tax purposes, so it can offset gains and reduce tax owed. That is the concept. Whether and how it works for crypto in your situation depends on where you are tax-resident, how your tax authority classifies cryptoassets, and which anti-avoidance rules apply locally.

Tax treatment varies by jurisdiction. Rules governing loss realization, repurchases, wash-sale or anti-avoidance provisions, and the classification of cryptoassets can differ substantially. The sections below cover a handful of jurisdictions where primary-source rules are publicly available. This page is educational and is not tax, legal, or accounting advice.

What tax-loss harvesting is as a concept

At its core, tax-loss harvesting has three moving parts that are consistent across most capital-gains systems:

An unrealized loss. You hold an asset whose current market value is below your cost basis.
A disposal event. You sell, swap, or otherwise dispose of the asset in a way the local tax authority treats as a realization.
An offset. The realized loss reduces your taxable gains for the period (and sometimes a limited amount of ordinary income), subject to local rules on carry-forward, pooling, and anti-avoidance.

The nuance for crypto is that different tax authorities classify tokens differently — some treat them as property, some as intangible assets, some apply bespoke rules — which changes which anti-avoidance provisions attach.

Jurisdiction snapshots

The snapshots below are based on official guidance available at the date of review. Rules change; always re-check the primary source before acting, and consult a qualified local tax professional.

United States

Authority: Internal Revenue Service (IRS); Internal Revenue Code (IRC).
Classification: The IRS treats convertible virtual currency as property for federal tax purposes.
Wash-sale rule: IRC §1091 disallows a loss on the sale of "stocks or securities" where substantially identical stock or securities are acquired within a 30-day window. Because the IRS currently classifies crypto as property rather than as a security, §1091 is not written to reach it on its face. Legislative proposals to extend §1091 to digital assets have been floated but have not been enacted as of the last review date. This may change.
Loss limits: Net capital losses offset capital gains; up to $3,000 of excess per year can offset ordinary income (IRC §1211(b)), with the remainder carried forward (IRC §1212(b)).
Sources: IRS Notice 2014-21 (classification); IRS Rev. Rul. 2023-14 (staking rewards); IRS crypto FAQ; IRC §§1091, 1211, 1212.
Date checked: 2026-10-02.

United Kingdom

Authority: HM Revenue & Customs (HMRC).
Classification: HMRC treats most cryptoassets held by individuals as chargeable assets for Capital Gains Tax, documented in HMRC's Cryptoassets Manual.
Loss realization and matching: HMRC applies share-matching rules to cryptoassets, including a "same-day" rule and a 30-day "bed and breakfasting" rule, before falling back to a pooled (Section 104) cost basis. In practice, disposing of a token at a loss and reacquiring the same token within 30 days causes the reacquired units to be matched against the disposal, which can change or eliminate the loss claimed.
Sources: HMRC Cryptoassets Manual (CRYPTO22200 series on calculating gains and losses for individuals).
Date checked: 2026-10-02.

Australia

Authority: Australian Taxation Office (ATO).
Classification: The ATO treats cryptoassets held by individuals as CGT assets; disposals (including crypto-to-crypto swaps) are generally CGT events.
Anti-avoidance: The ATO has publicly cautioned that "wash sales" — disposing of an asset to crystallize a loss and reacquiring a substantially identical asset shortly afterward — can be challenged under Part IVA of the Income Tax Assessment Act 1936 as a scheme entered into for the dominant purpose of obtaining a tax benefit. There is no fixed day-count safe harbor equivalent to US §1091.
Sources: ATO guidance on cryptoassets and CGT; ATO Taxpayer Alert and public statements on wash sales.
Date checked: 2026-10-02.

If your jurisdiction is not listed here, that is not an opinion about how the rules work there — it means we do not have a primary source we are willing to cite in a YMYL page. Ask a qualified local tax professional.

Timing considerations

Readers often ask whether they can sell at a loss and immediately buy the same token back. The honest answer: the applicability of same-day or short-interval repurchase rules depends on jurisdiction and on the asset's legal classification locally. A US investor's position is not an Australian investor's position, and neither is a UK investor's position. Consult a qualified tax professional for your specific situation before relying on any particular timing.

When loss realization is worth thinking about

Separate from the mechanics, there are moments where it is worth sitting down with your records:

End of the tax year. Review positions with unrealized losses against realized gains for the period.
Rebalancing. Disposals triggered by portfolio rebalancing are already taxable events in most capital-gains systems; it is worth understanding how losses on one leg interact with gains on another.
A large realized gain. If you have crystallized a sizeable gain this year, understanding how losses would offset it (and under what matching rules) is more valuable than usual.

When it does not help

You have no gains to offset and your jurisdiction's ordinary-income offset is capped or unavailable.
The cost-basis tracking effort exceeds the potential tax saving.
The asset dropped for structural reasons and you would not want to rebuy regardless.

Record-keeping

Whatever your jurisdiction, you will need clean records: acquisition dates, cost basis, disposal dates, proceeds, and the specific units matched. Crypto tax software such as CoinTracker, Koinly, or CoinLedger can generate these from exchange and wallet data; see our overview of best crypto tax software.

Frequently asked questions

Does the wash-sale rule apply to crypto?

The answer depends on the jurisdiction and on how local law classifies the asset. In the US, Internal Revenue Code §1091 applies the wash-sale rule to 'stocks or securities,' and the IRS has treated convertible virtual currency as property since Notice 2014-21 — meaning §1091 does not currently reach most crypto on its face. Legislative proposals to change this have been floated but not enacted as of our last review. Other jurisdictions apply different anti-avoidance or 'bed and breakfasting' rules. This is general information, not tax advice — consult a qualified tax professional for your situation.

Can I sell crypto at a loss and immediately buy it back?

The applicability of same-day or short-interval repurchase rules depends on jurisdiction and on how cryptoassets are classified locally. For example, the UK applies 'same-day' and 30-day matching rules under HMRC's Cryptoassets Manual, while the US wash-sale statute (§1091) is written for stocks or securities. Do not assume one country's treatment carries over to another. Consult a qualified tax professional for your specific situation.

How much loss can I claim?

This also varies by jurisdiction. In the US, capital losses first offset capital gains, and up to $3,000 of net capital loss per year can offset ordinary income under IRC §1211, with the remainder carried forward (IRC §1212). Other jurisdictions have their own caps, carry-forward windows, and loss-pooling rules. Check with a qualified tax professional in your jurisdiction.