Missing GBP values can understate or overstate your taxable income. They can also make later capital gains calculations unreliable. Record the receipt date, token quantity, and supportable GBP market value for each payment. Do this even if you have not sold the tokens.
Receipt date and GBP value usually matter first
Crypto rewards can be income when they reach your account or wallet. Use their fair market value in GBP at receipt.
Unsold rewards can still be taxable
Keeping the token does not always delay crypto tax. If Nexo credits ETH interest on 15 January, record its GBP value then. Use the date it was credited and available to you. Do not use its value when you later withdraw it.
For the 2025/26 tax year, the Personal Allowance is £12,570 for most people. The Personal Savings Allowance is normally £1,000 for a basic-rate taxpayer. It is normally £500 for a higher-rate taxpayer. These thresholds do not prove that a crypto payment qualifies as savings income.
The date of receipt often sets the first tax record.
A reward called “cashback”, “airdrop”, or “bonus” is not automatically tax-free. The key question is why it was paid. Check what you had to do to receive it. A platform may pay it for lending, marketing, spending, or another service.
Classify every credit by token, reason, date, time, GBP value, and supporting evidence. Think of this as labelling receipts before completing a tax return.
| Payment type | Facts to record | Likely review point | Useful evidence |
|---|
| Lending interest | Assets lent, rate, credit time | Income at receipt | Terms, CSV, account history |
| Staking reward | Protocol, validator, claim date | Income analysis at receipt | On-chain record, validator log |
| Welcome or referral bonus | Required action and campaign | Promotion or service-linked income | Campaign terms, dashboard image |
| Cashback | Card spend and merchant | Discount versus separate reward | Card statement, platform terms |
| Airdrop or promotion | Eligibility and activity required | Facts determine treatment | Wallet history, announcement |
Cashback needs its own evidence
Cashback linked directly to a purchase may be closer to a discount. It may not be payment for services. A separate token bonus for joining a card programme may need different treatment.
Referral and airdrop facts come first
For a referral reward, record the action that earned it. This could be introducing a friend, opening an account, depositing Bitcoin, or completing a trading task. For an airdrop, record whether you performed a service. Also record whether you held a token passively or joined a marketing campaign.
Platform labels are marketing words, not tax answers.
Receipt-time GBP prices set income and later cost
Use the GBP market value at receipt, not today’s balance. That value can also form the acquisition cost for Capital Gains Tax later.
How one reward can create two tax records
1. Receive
0.005 BTC credited
15 January, £250
→
2. Record
Potential income: £250
Token cost record: £250
*Before allowable fees and the UK matching and pooling rules.
A full GBP example
Suppose a platform credits 0.005 BTC as lending interest. At that time, it is worth £250. Record £250 as the value received. If you later sell the same economic holding for £320, the simple starting gain is £70. This is before sale fees and share matching rules.
✅Our recommendation
A current UK crypto tax reference book can help when checking income, disposal, and allowable loss terms. It works best with your own platform exports and HMRC guidance.
- Explains UK Income Tax and Capital Gains Tax terms in one place
- Helps compare platform statements with Self Assessment entries
- Gives a paper reference for rebuilding older transactions
Check availability →In a separate example, assume a platform credits 0.005 BTC on 15 January. Its GBP market value is £250. The platform charges no receipt fee. Treat £250 as crypto income at receipt. Record it as the acquisition amount for relevant Capital Gains Tax records.
If a later sale produces £330, assume a £10 exchange fee. The simple proceeds are £320. The simple capital gains calculation is £70. That is £320 less £250.
In practice, Bitcoin is subject to UK share-matching and Section 104 pooling rules. The final allowable cost may not be £250 for that single credit. Keep the receipt date and fair market value source. Keep the platform credit record and all fees. This lets you reconcile lending records.
One reward may create income first and a gain later.
Lending deposits may create a separate disposal
A transfer to a platform can be a disposal. This can happen if you exchange beneficial ownership for a new right or token.
Check ownership and contractual rights
Read the terms that applied on the deposit date. Look for title transfer and rehypothecation wording. Check if the platform can lend assets to third parties. Also check withdrawal rights. Your balance may be an IOU, not the original Bitcoin.
Receipt tokens and token swaps differ
An interest-bearing receipt token may show a crypto-to-crypto exchange. One example is a token that represents deposited ETH. A simple account entry on a custodial platform may have different facts.
Collateral is not lending income
Collateral is crypto posted to secure a loan. It is not automatically income. A liquidation can be a disposal. The protocol may sell collateral to repay the debt.
Use a transaction-by-transaction decision path. Do not treat every transfer as lending income. Do not treat every deposit as a disposal. First, check whether the platform took beneficial ownership. It may merely hold the crypto in custody.
Next, check if the transfer created a receipt token or contractual claim. Check for another transferable right too. A receipt token or instant token swap may need separate disposal analysis. Then separate borrowing collateral from assets supplied for returns. Collateral is not crypto lending interest itself. A liquidation may still be taxable.
For DeFi, keep the smart-contract transaction and receipt token. Keep the relevant terms too. Legal and economic rights can differ from centralised platform credits.
The error most often seen here is treating every deposit alike. The next section explains why lost access also needs proof.
A falling account balance is not automatically an allowable capital loss. First identify the asset or legal right owned. Then check if a disposal occurred. Record the GBP proceeds or recovery value.
Frozen balances are not automatic losses
A frozen balance on an insolvent platform does not automatically create a tax loss. This remains true when withdrawals stop. Keep account statements and creditor claims. Keep insolvency notices and recovery distributions. Also retain proof of the rights you held.
Liquidations need a full transaction record
A DeFi liquidation can include a disposal of collateral. It can also include fees, debt repayment, and residual tokens. Record the quantity liquidated and timestamp. Record the GBP market value and protocol fees. Record any amount returned to your wallet.
Evidence to gather before self assessment
Your records should let another person rebuild each event without guessing.
- Keep CSV exports showing credits, deposits, withdrawals, trades, and fees.
- Keep wallet addresses, transaction hashes, and on-chain histories for DeFi and liquidity pools.
- Keep a GBP price source, timestamp, and conversion method for every reward.
- Keep platform terms, campaign rules, referral pages, and card statements.
- Keep loan, collateral, and liquidation records, including recovered assets.
Good records turn a platform statement into checkable tax evidence.
This guidance may not be relevant if you only bought and held crypto. It also may not apply if you received no crypto returns. It does not cover cases where assets, income, and tax residence are outside the United Kingdom. It is not personalised advice for substantial sums or failed platforms. Seek advice for complex DeFi contracts, business activity, or mixed tax residence. This includes residence across England, Wales, Scotland, Northern Ireland, or another country.
Frequently asked questions
Do I pay tax on crypto interest before selling it?
Crypto interest can be taxable when received, based on its GBP market value. Keeping the tokens does not always delay tax. A later sale may create a separate Capital Gains Tax calculation. The receipt value may form part of the cost basis.
No, a year-end balance cannot replace each reward’s GBP value at receipt. Keep the platform export and a price source. Do this for every material credit.
Does depositing Bitcoin into DeFi trigger tax?
A DeFi deposit can trigger a disposal if it creates a different asset or right. Check the smart-contract outcome and any receipt token. Check the terms that govern ownership.
A failed platform balance is not automatically an allowable loss when access is lost. You need proof of the asset or claim. You also need the relevant disposal or loss event. Record any recovery received.
Rebuild every platform payment from evidence before filing.
The essentials:- Record each reward at its actual GBP value when received, not at withdrawal or year end.
- Keep income records separate from later gains or losses when you sell received tokens.
- Review lending deposits, collateral, and receipt tokens as separate transactions with different legal rights.
- Do not claim a platform-related loss until you check the disposal and evidence.
Before submitting Self Assessment, reconcile platform CSV data with wallet history. Identify each event as income, a disposal, or both at different times. Keep lending rewards separate from later gains and losses. Do not net them just because they involve the same token.
Review staking rewards, crypto cashback, referral rewards, bonuses, and airdrops separately. Their treatment can depend on services performed. It can also depend on campaign terms or a direct purchase discount.
Check GBP values, timestamps, fees, missing transfers, and duplicate imports. Do this before relying on tax software. Seek professional advice if a platform failed. Do the same where DeFi issued receipt tokens or liquidated collateral. Advice also helps where records cannot show ownership. It may be needed if activity amounts to trading rather than investment.
Learn more
Here are some additional resources on this subject:
