Get the most from your UK tax return: 2026 crypto edition

Getting the most from your UK tax return is not about loopholes. It is about using the allowances Parliament intentionally gave you, in the right order, before the 5 April cut-off. For the 2025/26 tax year — the one being filed in 2026 — the rate environment changed, the allowance settled at £3,000, and CARF data sharing became operational. This guide covers the practical moves that work within those rules.

What changed for 2026

• Annual exempt amount: £3,000. Down from £6,000 in 2023/24 and £12,300 in 2022/23. The shrinking allowance means more disposals matter.
• CGT rates: 18% / 24%. The basic-rate CGT was raised from 10% and the higher rate from 20% in the 30 October 2024 Budget. Both apply to crypto gains in 2025/26.
• CARF live. Standardised cross-border data sharing means HMRC sees offshore exchange activity automatically. The strategy is no longer non-disclosure; it is correct disclosure.

Use the £3,000 AEA

The annual exempt amount is "use it or lose it". It does not roll forward. Each tax year you can realise up to £3,000 of net gains without paying any CGT.

Practical applications:

• Bed and spouse. Sell £3,000-of-gain worth of crypto, have your spouse re-buy a similar position. Resets the cost basis to current price tax-free.
• Bed and ISA.Sell crypto, use proceeds to fund a stocks-and-shares ISA. Crypto itself isn't ISA-eligible, but the realised gains can fund one — the gain is sheltered by the AEA.
• Annual rebalancing. Take a small slice of your largest winner each year to rebalance, using the AEA to absorb the gain.

Harvest losses before 5 April

Loss harvesting is the second-most-impactful move. The mechanic:

1. Identify holdings sitting at a paper loss.
2. Sell to crystallise the loss.
3. Wait at least 31 days before re-buying the same asset.
4. The loss offsets gains in the same tax year, with excess carried forward.

Critical timing: the disposal must settle by 5 April for the loss to land in the 2025/26 year. On most exchanges, fiat sales settle the same day. On-chain swaps settle in minutes. There is rarely a settlement-timing problem with crypto, unlike with traditional shares.

Spousal transfer

Transfers between spouses or civil partners are not disposals. The receiving spouse takes over the original cost basis. This unlocks two tactics:

• Doubling the AEA. Move some appreciated tokens to your partner, then both of you can realise £3,000 of gain — £6,000 tax-free per household.
• Lower-band disposal.If one spouse sits firmly in the basic-rate band and the other is a higher-rate taxpayer, dispose in the basic-rate spouse's name to pay 18% rather than 24%.

The transfer must be a genuine gift — there is no claw-back for divorce, but family arrangements do need to be real. Document the transfer with an on-chain record or a written instruction.

Claim every allowable cost

Every quid of allowable cost reduces the gain and the tax. HMRC accepts:

• Exchange fees on the buy and sell sides.
• On-chain gas paid on the disposal transaction. Gas paid on transfers between your own wallets is generally not deductible.
• Reasonable valuation costs for difficult-to-price assets.
• Costs of acquiring information about the asset incurred at acquisition or disposal.

For investors, software subscription fees are generally not directly deductible against CGT. They are, however, a deductible expense if your activity rises to the level of a trade — which is rare; see UK reporting obligations for the badges of trade test.

Time income receipts

Staking, mining and lending rewards are taxed as income at the marginal rate (20% / 40% / 45%) at the £ value on the day of receipt. Two timing levers exist:

• Pension contributions. A higher-rate taxpayer making personal pension contributions can lower their marginal rate — meaning crypto income received that year is taxed less.
• Tax-year boundary. If you have control over when rewards are claimed (some staking protocols let you delay), pulling rewards across tax-year boundaries can balance income across two years and avoid tipping into a higher band in either.

CARF: declare cleanly

Under the Crypto-Asset Reporting Framework, HMRC now receives standardised data from UK and partner- country exchanges automatically. Practically:

• Your declared figures are matched to exchange-reported figures.
• Discrepancies trigger nudge letters or, in larger cases, enquiries.
• The strategy of "they won't check" no longer holds even for offshore venues.

The right response is to use the same data feeds the exchange sent HMRC. Modern crypto tax software consumes CARF-aligned exports, so your figures, the exchange's figures and HMRC's figures all reconcile by default.

Year-end calendar

For the underlying calculation method, see how to calculate crypto taxes. For the filing walkthrough, see how to report crypto on taxes. For the broader five-step process, see UK crypto tax best practices.