Moving Bitcoin to an overseas exchange or hardware wallet before a move, sale or remittance can feel simple. From 6 April 2025, wallet location alone does not make a Bitcoin gain foreign. It also does not restore the old remittance basis.
Plan your bitcoin route, residence evidence and FIG
Your starting point is your UK tax residence. This asks whether the Statutory Residence Test treats you as UK resident for a tax year. The UK tax year runs from 6 April to 5 April.
Before placing any Bitcoin sale, swap or purchase order, make a one-page timeline. Include each tax year, your residence countries, UK day count, and planned arrival or departure dates. Add any planned Bitcoin disposals.
If you are not yet UK resident, check the proposed sale date before arriving. Review your overseas tax position and keep evidence. The immediate risk is becoming UK resident before a planned disposal.
The date you become UK resident can change the whole result.
FIG may help new UK residents for four tax years. You must have been non-UK resident for the previous ten tax years. FIG is a four-year entry route after a long period abroad.
It is not a permanent benefit linked to non-dom status. The remittance basis is not the general answer after 5 April 2025. Check the rules before moving funds or selling Bitcoin.
Key points:
- The remittance basis is not the general solution for UK non-doms after 5 April 2025.
- An offshore wallet or exchange does not, by itself, make Bitcoin gains foreign.
- Bitcoin sales, swaps and purchases can trigger tax consequences. Keep a full sterling-value audit trail.
Bitcoin sales, swaps and payments need records
Selling Bitcoin for sterling can be a disposal of cryptoassets. Swapping Bitcoin for another token can also be a disposal. Paying for goods with Bitcoin can create one too.
HMRC normally expects you to calculate the gain in pounds sterling. Use the value at the time of the transaction. This applies even when no pounds enter your exchange account.
HMRC may not use your chosen coin
HMRC matching rules can change the purchase cost in your calculation. Think of these rules like a queue. HMRC decides which Bitcoin units leave your holding first.
The usual order starts with acquisitions on the same day. Next come acquisitions within the following 30 days. Then HMRC uses the Section 104 pool.
A Section 104 pool is an average-cost pot. It contains your remaining identical tokens. This can produce a different gain from the one you expected.
| Matching rule | Time window | Effect on Bitcoin gain |
|---|
| Same-day rule | Same calendar day | Matches purchases made that day before the pooled holding |
| 30-day rule | Next 30 days | Can override the average cost when Bitcoin is repurchased |
| Section 104 pool | All remaining holdings | Uses an average allowable cost per Bitcoin |
Keep a proof file, not screenshots alone
Your file should show the acquisition date, quantity, sterling value, and fees. Keep exchange statements, wallet addresses, and transfer records. Screenshots alone rarely show the full story.
Transfers between wallets you control are not normally disposals. You still need proof that both addresses remained under your control. Save transaction hashes and exchange exports.
Good records make a later HMRC query far easier.
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Our recommendation
A current UK Bitcoin tax reference can help organise exchange exports. It can also explain the Section 104 pool before Self Assessment. It cannot replace advice where FIG, trusts, or another country’s tax rules apply.
- It helps explain why crypto-to-crypto swaps may need a sterling valuation.
- It gives a paper reference for wallet transfers across several exchanges.
- It supports a structured review before entering gains and losses on Self Assessment.
Check availability →
Income events need separate treatment
Mining income, staking rewards, and some airdrops may count as income when received. A later disposal can then create a capital gain or loss.
This general approach is not enough if you have been UK resident for more than four tax years. It is also not enough if you hold Bitcoin through trusts or companies. Seek advice if you have mixed funds, mine, trade professionally, or use complex crypto-backed loans. Other risks include overseas tax residence, citizenship elsewhere, or a material sale. Double-tax relief, anti-avoidance rules, exchange reporting, and the OECD Cryptoasset Reporting Framework can change the result.
A crypto-backed loan needs a transaction-by-transaction review. Giving Bitcoin as collateral is not normally a disposal. This assumes you retain beneficial ownership and a right to recover it.
The lender may hold the keys or control liquidation. That fact alone does not normally create a disposal. Receiving loan funds is also not usually taxable income.
This treatment remains the same if the loan is in sterling, dollars, or stablecoins. The position changes after a margin call. A sale, exchange, or appropriation of Bitcoin can then be a disposal.
A forced Bitcoin sale can create a taxable gain.
The sterling proceeds and HMRC matching rules determine the gain or loss. Interest, platform charges, and reward arrangements need separate review. They are not always deductible from an individual's Bitcoin capital gain.
Reconcile cryptoasset records to each UK tax year. Do not rely only on an exchange's calendar-year statement. The UK tax year runs from 6 April to 5 April.
For Self Assessment, online returns are normally due by 31 January. This date follows the end of the relevant tax year. The balancing payment is generally due on that same date.
Earlier registration and payment duties can apply where tax is due. Keep raw CSV exports and your gain calculation. Record GBP values, price sources, fees, and wallet-to-wallet transfers.
Also record same-day, 30-day, and Section 104 pool matching. HMRC can compare your return with exchange data. This data may come from UK and overseas exchanges.
Reporting rules are still evolving. They include the OECD Cryptoasset Reporting Framework.
Your questions answered
Can UK non-doms still use the remittance basis?
The remittance basis ceased as the general regime from 6 April 2025. Historic pre-April 2025 matters may still need review. New planning should start with FIG and UK residence.
Does a foreign exchange make my Bitcoin gain foreign?
No, an overseas exchange does not by itself make a Bitcoin gain foreign. The facts, ownership, activity, and legal tax analysis matter more. The platform’s address is not enough.
Is swapping Bitcoin for USDC taxable in the UK?
Yes, a Bitcoin-to-USDC swap can be a taxable disposal for UK Capital Gains Tax. Record the sterling market value. Check same-day, 30-day, and Section 104 matching rules.
Can I spend Bitcoin without creating a UK tax charge?
Spending Bitcoin can create a taxable disposal even without receiving sterling. The gain is usually what you receive in sterling value. Subtract the allowable matched cost.
How long must I be abroad to claim FIG?
You generally need ten prior tax years of non-UK residence for four-year FIG relief. You must claim relief for each relevant year. A claim can affect personal allowances.
What records should I keep for HMRC crypto tax?
Keep dates, quantities, sterling values, fees, exchange exports, wallet transfers, and residence evidence. Retain proof that your own wallet transfers were not sales. Keep enough detail for HMRC to follow each transaction.
Further reading
If you want to learn more about this topic, these sources may interest you:
