Crypto Airdrop Tax UK: When Income, When Capital, Worked Examples

Airdrops are not a single tax category in the UK. HMRC's CRYPTO21250 guidance splits them by whether you did anything to earn them — and the difference between "did nothing" and "did something" is the difference between zero income tax and a marginal-rate bill on the receipt.

The two-bucket rule

Bucket one: you received the airdrop without doing anything. You held the right address, the project airdropped to it, you didn't sign up, complete tasks, or provide a service. No income tax on receipt. The tokens enter your Section 104 pool at £0 cost basis. CGT applies only when you eventually dispose.

Bucket two: you did something to qualify. Filled out a form, joined a Discord, completed a quiz, used the protocol's testnet, retweeted, bridged volume, or otherwise performed an action that the project rewarded. HMRC treats this as miscellaneous income, taxable at your marginal rate (20%/40%/45%) in the year of receipt at the GBP-equivalent value when the airdrop landed.

Subsequent disposal of bucket-two tokens triggers a CGT event with cost basis equal to the income-tax-recognised value.

Worked example: Arbitrum ARB

You bridged some ETH to Arbitrum in 2022, used Uniswap once, then forgot about it. In March 2023, ARB airdropped 625 tokens to your wallet at $1.40 each — £730 GBP-equivalent on the airdrop day.

HMRC's view: you used the protocol. ARB was a retroactive reward for that usage. That's a service in exchange for tokens, even if minimal. Bucket two — £730 of miscellaneous income on your 2022/23 Self Assessment. Cost basis for the 625 ARB is £730.

If you sold them later at $2.00 each (£1,000 total), your CGT gain is £270 (proceeds £1,000 minus basis £730).

Worked example: Jupiter JUP

December 2023, Jupiter airdropped tokens to wallets that had used the DEX aggregator. You'd used Jupiter to swap once during 2023. The receipt value was around £1.10 per JUP.

Same analysis as ARB: you used the protocol, the protocol rewarded usage. Miscellaneous income at receipt value. The wider eligibility (anyone who had swapped) doesn't change the analysis — HMRC cares whether YOU did something, not how broad the airdrop was.

Worked example: EigenLayer EIGEN

You restaked some ETH via EigenLayer to earn points. In Q3 2024, EIGEN airdropped to point holders. You'd actively committed capital to the protocol in exchange for a future allocation.

This is the clearest bucket-two case: explicit point-farming for an explicit reward. Miscellaneous income at the GBP receipt value, no ambiguity.

Bucket-one cases are rare

The truly "did nothing" airdrop is uncommon. Examples that might qualify: a community fork airdrop (Bitcoin Cash to BTC holders) where the receiving wallet did nothing other than hold BTC. A genuine surprise — some projects airdrop to ENS holders or to random addresses with no protocol interaction.

Even then, HMRC takes a strict view: holding the prior asset is itself "doing something" in some readings. The conservative path is to treat any airdrop as miscellaneous income unless you can articulate a clear "I did nothing" story.

Forks vs airdrops

A hard-fork resulting in a new token (BCH from BTC, ETC from ETH) is treated by HMRC similarly to an airdrop received passively. The new tokens take a portion of the original asset's cost basis — typically apportioned by relative market value at the fork date — and no income event arises. This is the cleanest bucket-one case in the manual.

Locked, vesting, or claim-required airdrops

If the airdrop tokens are locked or vesting, the income event arises on the date you have a "right to receive" — typically the claim date, not the announcement date. The GBP value is taken at the claim date.

If the airdrop requires an active claim (sign a transaction, pay gas), the claim itself is the trigger. Untouched, unclaimed allocations are not income — you can't be taxed on tokens you never asserted ownership of.

What CryptoLens does with this

The tax engine flags every incoming transaction that matches an airdrop pattern (Genesis-style mint from a contract, no corresponding outgoing transaction). Default treatment is bucket two (miscellaneous income at receipt-date GBP value). If you can demonstrate bucket-one applies, you can reclassify per-event before exporting the SA108-ready report.

For the £3,000 CGT allowance: airdrop income doesn't touch the CGT allowance. It uses your personal allowance (£12,570 for 2025/26) on the income tax side. Subsequent disposal gains use the £3,000 CGT allowance.

This is a quirk: a heavy airdrop year can use up your personal allowance without you ever selling a thing. Plan accordingly — selling enough to cover the income-tax bill in the same tax year often makes sense.