Process summary
Decide classification, value in GBP, and report on Self Assessment.
Complete four stages: classify, value, report, and preserve evidence.
Allow 30–120 minutes per airdrop to gather records and calculate values for a simple case.
Identify whether the airdrop was for services, employment, promotion, or was gratuitous.
Record token amount, UTC timestamp, wallet address and any issuer communication.
Capture the token ID and sending wallet hash for every receipt.
Capture the market price and GBP FX rate at the receipt timestamp.
Take a timestamped screenshot or an API export showing price and FX.
What Self Assessment needs
Report income in the tax year of receipt on SA100 in the correct income box.
Report disposals on SA108 with GBP proceeds, acquisition cost and gain or loss.
Attach a short computation showing valuation sources and box references for HMRC.
⚠️ Do not omit the UTC timestamp; missing timestamps cause most valuation disputes.
Classifying and valuing airdrops for UK tax purposes
Classify the airdrop as income or capital to set the tax point.
The decisive test is whether the recipient provided consideration in return for the tokens.
If the recipient provided services, promotional activity or employment, treat the airdrop as income on receipt.
If the airdrop was gratuitous and unconditional, treat it as a capital asset for CGT on disposal under TCGA 1992.
Tests to identify taxable income
Check contracts, marketing terms and issuer messages for an exchange of services or obligations.
Look for wording such as "reward for participation", "payment" or "assigned rights" as indicators of income.
The common error is assuming all airdrops are non‑taxable gifts; that often leads to unpaid Income Tax where consideration existed.
This fact is decisive: if services were provided, tax applies at receipt.
Valuation at receipt
Obtain a GBP value for tokens at the exact receipt timestamp.
Use an exchange mid‑price, a reputable aggregator or a documented OTC price when needed.
Record the source, conversion method and timestamp so HMRC can verify the valuation.
Retain one clear supporting file per airdrop that shows price and FX together.
Market price selection
Prefer the exchange where the token traded actively at the receipt time.
If no active venue exists, use CoinMarketCap or CoinGecko and record the choice and rationale.
Document why the chosen source best reflected market value at receipt for audit clarity.
Valuation for illiquid tokens
Prepare a reasoned valuation using comparable trades, tokenomics or recent OTC deals.
Document all assumptions and supply timestamped evidence such as screenshots or trade blotters.
This works well in theory, but in practice thin markets cause disputes and take extra time to resolve.
Record‑keeping and legal deadline
Record and retain valuation evidence, conversion details and issuer communications.
Retain records for at least five years from 31 January following the tax year to which they relate.
⚠️ Do not rely on memory or loose notes; undocumented valuations trigger HMRC enquiries.
Step 3: Report on Self Assessment
Enter figures on Self Assessment in the tax year of receipt using the correct schedules.
Include income values on SA100 or disposals on SA108 as appropriate.
Attach a supporting computation that shows sources and the exact SA boxes used.
SA100 phrasing and placement
If taxable as employment income, include it under employment pay and benefits.
If not employment income, include it under "Other UK income" with a separate computation.
State the issuer, receipt date, valuation method and GBP value in the computation file.
SA108 capital gains entries
Record proceeds in GBP and list acquisition cost as the GBP value at receipt.
Show gain or loss and apply pooling rules and the annual exempt amount where applicable.
Refer to HMRC guidance when preparing computations for a final check. HMRC guidance on cryptoassets
⚠️ Enter the GBP value in the tax year of receipt; valuing at disposal inflates income and causes errors.
Step 4: prepare evidence and reconciliation
Gather issuer communications, wallet receipts, exchange screenshots and transaction history.
Produce a reconciliation log that maps each platform report to your records.
Keep each reconciliation entry succinct and timestamped for audit purposes.
Fields to capture
Capture token amount, token ID, UTC timestamp, wallet address and GBP valuation source.
Include issuer messages and any contract or terms that show consideration.
A short audit trail linking wallet, issuer and valuation reduces HMRC query risk.
Map wallet addresses to platform accounts and preserve KYC links and snapshots.
Expect platforms to report under DAC8 and OECD standards from 2026 onward.
An anonymous case: a taxpayer failed to map a hot wallet and received a data mismatch query from HMRC.
⚠️ Do not assume platforms will match your labels; keep raw transaction hashes and screenshots.
If the case is complex or the sums are large, seek a specialist tax adviser before filing.
Frequently asked questions
Are crypto airdrops taxable in the UK?
Yes: when the airdrop is received as payment for services or employment it is taxable as income on receipt.
If the airdrop is gratuitous there is no Income Tax at receipt and a later disposal triggers CGT.
Provide issuer messages and valuation evidence to support the chosen treatment.
How should I value a foreign airdrop for HMRC?
Use the best available market price at the receipt timestamp and convert to GBP with a recognised FX source.
Record exchange name, price, timestamp and the conversion method to provide clear evidence.
If the market is thin, prepare a reasoned valuation and document comparable trades.
How do I report disposal of an airdropped token?
Report disposal proceeds and allowable costs on SA108 capital gains pages in GBP.
Use the GBP value at receipt as acquisition cost when the token was taxed as income.
Show pooling calculations and the annual exempt amount on the SA108 computation.
Can I claim foreign tax credit for tax paid?
Yes, claim double taxation relief when foreign tax is comparable and documented.
Declare the taxable amount in GBP and show the foreign tax paid on the Foreign pages of SA100.
Include the foreign tax certificate and the credit calculation in your computation.
Do I need to keep chain data and exchange records?
Yes, retain wallet transaction history, exchange screenshots and issuer communications for at least five years.
HMRC expects a clear audit trail linking wallet, issuer and valuation for every airdrop claimed.
Store records in a searchable folder with one file per airdrop for quick retrieval.
What if the airdrop involves the remittance basis?
If claiming the remittance basis, offshore airdrops kept entirely overseas generally need not be reported until remitted.
If tokens move to a UK exchange or funds enter a UK bank, that act usually creates a remittance and tax becomes due.
Document offshore holdings, non‑UK exchange wallets, timestamps and all transfers for evidence.
Worked examples, templates and checklist
Prepare examples and templates for immediate copy and paste when filing Self Assessment.
Allow 20–60 minutes to adapt each example to a real case.
Example a: income on receipt
Scenario: 1,000 TOKEN received for consulting on 15 Oct 2025 at 14:00 UTC.
Market price: TOKEN = $2.00 at receipt. GBP rate at 14:00 UTC = 1 GBP = $1.28.
Conversion: 1,000 × $2.00 = $2,000. $2,000 ÷ 1.28 = £1,562.50 taxable as income.
Tax: add £1,562.50 to taxable income for 2025/26 and apply marginal rates.
If marginal rate is 40%: Income Tax due ≈ £625.00 plus any NICs.
Example b: gratuitous airdrop
Scenario: 500 TOKEN gratuitously received 01 Feb 2024 at 10:00 UTC.
Market value at receipt = £1.00 per TOKEN. No Income Tax at receipt if genuinely gratuitous.
Disposal: sold 01 Aug 2025 for 500 × £3.00 = £1,500.
Acquisition cost: £500; chargeable gain: £1,000 before the Annual Exempt Amount.
Apply CGT rates and allow for individual circumstances under TCGA 1992. See the SA108 entry example below for an alternative presentation.
Example c: foreign tax
Scenario: income airdrop valued at £2,000 taxed abroad at 10%.
UK taxable income includes £2,000; foreign tax paid £200.
Claim double taxation relief on Self Assessment with evidence and show the credit computation.
SA100 support note template for HMRC
Computation: Airdrop received 15 Oct 2025 (1,000 TOKEN) valued at £1,562.50.
Reason: Token issued as consulting consideration; evidence: issuer email dated 12 Oct 2025.
Valuation: Exchange mid price at 14:00 UTC; attach exchange XYZ API output.
Tax treatment: Included as "Other income" on SA100; see attached computation.
SA108 entry example
Disposal date: 01 Aug 2025
Proceeds: £1,500
Acquisition cost: £0 (gratuitous airdrop 01 Feb 2024)
Gain: £1,500
Pooling: not applicable
| Criteria |
Income on receipt |
Capital gains on disposal |
| Trigger |
Consideration for services or employment |
Gratuitous receipt, no consideration |
| Tax point |
Receipt date; value taxed as income |
Disposal date; gain taxed under TCGA 1992 |
| Valuation |
GBP at receipt timestamp |
Proceeds and base cost both in GBP |
1Classify: income or capital
2Value: GBP at receipt
3Report: SA100/SA108
4Preserve: evidence and log
- Record issuer messages and contract terms.
- Export wallet transaction history with hashes.
- Capture exchange price and FX rate at receipt timestamp.
- Prepare computation for SA100 or SA108 and attach valuation proof.
- Retain all records for at least five years from 31 January after the tax year.
References and legal anchors
HMRC Cryptoassets Manual and guidance pages underpin these steps along with Income Tax Act 2007 and TCGA 1992.
International reporting moves under DAC8 and OECD standards with implementation expected from 2026.
Examples seen in practice include valuing income at disposal instead of at receipt, which inflated taxable bases.
If the case involves remittance basis, trust arrangements, or complex cross‑border tax credits consult a specialist adviser; this guide does not substitute for bespoke advice.
Where do I put airdrop income on my Self Assessment
Include taxable airdrop income in the tax year of receipt on SA100 in the appropriate income box.
Provide a separate computation and attach it as "Other income: airdrop receipt" if not employment.
