You can legally reduce crypto tax by using allowances, timing disposals, offsetting gains with losses, transferring assets to a spouse and giving to charity. What works depends on your country: UK investors have a £3,000 annual exempt amount and a 30-day matching rule, while US investors pay lower rates on assets held for more than a year.
What is the difference between tax planning, avoidance and evasion?
Tax planning means using reliefs and allowances the law intends you to use. Tax evasion, such as hiding gains or falsifying records, is a crime. Between the two sits artificial tax avoidance, which tax authorities can challenge: the UK has a general anti-abuse rule and Australia's Part IVA targets schemes whose main purpose is a tax benefit. The strategies below are mainstream planning, but how they apply depends on your circumstances, and a qualified adviser can confirm what is appropriate.
Does holding crypto longer reduce tax?
In many countries, yes. The US taxes gains on assets held for more than a year at 0%, 15% or 20%, against ordinary rates of up to 37% for short-term gains. Australian individuals can usually halve a gain on an asset held for at least 12 months. Germany exempts gains on crypto held for more than a year, and Portugal exempts gains on crypto held for 365 days or more. The UK is different: capital gains tax is charged at 18% within the basic-rate band and 24% above it, whatever the holding period, so timing matters mainly for using each year's allowance. Our comparison of crypto tax by country gives the details.
How does tax-loss harvesting work for crypto?
Tax-loss harvesting means selling an asset that has fallen in value to realise a loss that offsets gains elsewhere. Whether you can buy the same asset straight back depends on where you live:
| Country | Rule | Effect on harvested losses |
|---|---|---|
| United Kingdom | Same-day and 30-day matching rules apply to cryptoassets | A rebuy within 30 days is matched with the sale, so the harvested loss is largely cancelled |
| United States | Section 1091 wash-sale rule covers stock and securities only (as of 21 Oct 2026) | Selling and rebuying non-security crypto does not currently trigger the rule; a pending bill would change this |
| Australia | ATO treats wash sales as possible tax avoidance under Part IVA | Losses from selling and quickly rebuying can be denied |
| Canada | Superficial loss rule for capital property | A loss can be denied if you rebuy the same property within 30 days before or after the sale |
UK example: you bought 1 ETH for £3,000. On 1 March you sell it for £2,000, and on 10 March you buy 1 ETH back for £2,050. Because the repurchase falls within 30 days, HMRC matches the sale with the 10 March purchase: your loss is £2,000 − £2,050 = £50, not £1,000. To keep the larger loss, you would need to wait more than 30 days before buying the same token again, and accept the price risk in the meantime.
How should you use your annual allowance and losses?
In the UK, the first £3,000 of total gains in the 2026/27 tax year is tax-free, and unused allowance cannot be carried forward. Spreading disposals across tax years can keep more gains within the allowance, but rebuying the same token within 30 days changes the calculation. Losses in the same year must be set against that year's gains first, while losses brought forward from earlier years only need to reduce gains down to the allowance. Report losses within four years so you can use them.
In the US there is no allowance, but long-term gains fall in the 0% band if your 2026 taxable income stays at or below $49,450 (single) or $98,900 (married filing jointly), so some investors realise gains in low-income years.
Can transferring crypto to a spouse reduce tax?
In the UK, transfers between spouses or civil partners who live together are treated as no gain, no loss. Each partner has their own £3,000 allowance and their own income tax bands, so a couple can sometimes pay less if the partner with the lower rate disposes of the tokens. The gift must be genuine and outright. In the US, transfers between spouses are also generally not taxable, and married couples filing jointly share the wider joint brackets.
Is donating crypto to charity tax-efficient?
In the UK, giving crypto to a charity is not a taxable disposal for the donor, so no capital gains tax is due. However, HMRC's Gift Aid guidance says cryptoassets are not money, so Gift Aid cannot be claimed on crypto gifts, and crypto is not a qualifying investment for the income tax relief on gifts of shares and land. If the charity needs Gift Aid, you would have to sell the crypto (a taxable disposal) and donate cash.
In the US, donating crypto held for more than a year to a qualifying charity generally gives a deduction at fair market value and avoids capital gains tax on the increase. The IRS Chief Counsel has said a qualified appraisal is needed for a claimed deduction over $5,000; an exchange price is not enough.
Does your cost basis method matter?
In the UK there is no choice: HMRC requires the same-day rule, then the 30-day rule, then the Section 104 pool's average cost. In the US you may specifically identify which units you sell, for example choosing higher-cost lots to reduce a gain, provided your records support it; otherwise first-in, first-out applies. Good records make every strategy above possible, so see our guide to what crypto tax records to keep, and our overview of how crypto is taxed for the basics. Tax authorities now receive platform data directly through Form 1099-DA and the Crypto-Asset Reporting Framework, so reported figures should match what platforms send.
Frequently Asked Questions
Does the 30-day rule apply to crypto in the UK?
Yes. HMRC matches a disposal of tokens with tokens of the same type bought on the same day, then with any bought in the next 30 days, before using the Section 104 pool. If you sell at a loss and buy back within 30 days, the loss is worked out against the new purchase price, which largely cancels the loss you hoped to harvest.
Can you claim Gift Aid on crypto donations?
No. HMRC does not consider cryptoassets to be money, and Gift Aid applies only to gifts of money. Gifts of crypto to a UK charity are free of capital gains tax for the donor, but they do not qualify for Gift Aid or for the income tax relief available on gifts of listed shares or land.
Is there a wash-sale rule for crypto in the US?
Not yet for crypto that is not a security. The wash-sale rule in section 1091 applies to stock and securities. A bill that would extend it to digital assets was approved by the House Ways and Means Committee in September 2026 but was not law on 21 October 2026, and it could take effect from an earlier date if enacted.
Can I carry forward crypto losses?
In most countries, yes. In the UK you must report a capital loss to HMRC within four years of the end of the tax year in which you made it, and unused losses can be carried forward indefinitely. In the US, net capital losses offset up to $3,000 of other income a year and the rest carries forward.
Sources & References
- HMRC Cryptoassets Manual — CRYPTO22253: the 30-day rule (example) (accessed 21 Oct 2026)
- HMRC — Charities detailed guidance, Chapter 3: Gift Aid (cryptoassets are not money) (accessed 21 Oct 2026)
- HMRC Cryptoassets Manual — CRYPTO22100: what is a disposal (gifts to charity) (accessed 21 Oct 2026)
- IRS Chief Counsel Advice 202302012 — appraisals for donated cryptocurrency (accessed 21 Oct 2026)
- Australian Taxation Office — Wash sales: the ATO is cleaning up dirty laundry (accessed 21 Oct 2026)
Reviewed against the cited official sources on 21 October 2026.
Disclaimer: Educational content only. Wealtii is early-stage and is not regulated by any financial regulator. Tax and legal rules change frequently and differ by country. This article is general information, not tax or legal advice — consult a qualified professional in your jurisdiction.
