You are about to sell part of your BTC, but your spouse has unused Capital Gains Tax allowance. In the UK, transferring between spouses: tax-safe UK methods usually means using the no gain/no loss rule while living together: no immediate CGT arises, but your spouse takes over your original allowable cost and the gain is deferred, not erased.
Who can use the no gain/no loss rule
A crypto transfer between spouses or civil partners is normally treated as taking place at no gain and no loss when they are living together and subject to UK tax rules. Section 58 of the Taxation of Chargeable Gains Act 1992 applies to cryptoassets: the sender has no immediate CGT gain, and the recipient inherits the sender's tax position.
The relationship test is narrow
A spouse is someone legally married to you, while a civil partner has a registered civil partnership. An unmarried partner cannot normally claim this relief, even after years of living together.
| Transfer situation | Immediate CGT result | Recipient's cost | Core proof |
|---|
| Married, living together | Usually no gain/no loss | Sender's historic allowable cost | Marriage and transfer record |
| Civil partners, living together | Usually no gain/no loss | Sender's historic allowable cost | Partnership and transfer record |
| Unmarried cohabiting couple | Market-value disposal normally applies | Usually market value | Gift and valuation record |
| Separated or overseas spouse | Depends on timing and residence | Case-specific | Legal and tax advice |
Separation has newer time limits
Finance Act 2023 changed the rules for transfers from 6 April 2023, extending no gain/no loss treatment in certain cases for up to 3 tax years after the tax year of separation, or indefinitely where a qualifying formal divorce agreement applies. Check the separation date, tax year and agreement before transferring.
A quick eligibility decision path
Start by asking whether the recipient is your legal spouse or registered civil partner at the transfer date. If not, a gift to an unmarried partner is normally a market-value cryptoasset disposal, not a Section 58 transfer. If they are a spouse or civil partner, check whether you are treated as living together in the relevant tax year; if you have separated, apply the Finance Act 2023 separation rules and confirm whether the transfer falls within the extended period or under a qualifying formal divorce agreement. Next, establish whether either person's UK residence, temporary non-residence position or overseas tax exposure changes the analysis.
Check the asset's tax character: crypto held as investment property is different from crypto acquired or transferred as trading stock for business resale. Only after those checks should a spousal crypto transfer or civil partner crypto transfer be documented and completed, with full beneficial ownership and private-key control passing to the recipient.
Transfer first when the later sale is genuine
Moving crypto before a planned sale can place the future disposal in the receiving spouse's tax position, while selling first fixes the gain on the original holder. Each person has their own CGT annual exempt amount, £3,000 for 2025/26, and their own Income Tax band.
A partial BTC transfer uses pooling
You cannot freely choose the cheapest or most expensive Bitcoin lot when transferring part of a holding. UK crypto tax normally applies the same-day rule, then the 30-day rule, then the Section 104 holding. If a pool holds 2 BTC with £30,000 allowable cost, a transfer of 0.4 BTC normally carries £6,000 of pooled cost.
Tax bands can change the outcome
A basic-rate recipient may pay a lower CGT rate on some or all of a gain than a higher-rate taxpayer. For most cryptoasset gains, rates are generally 18% and 24% from 6 April 2025, depending on taxable income and gains. The recipient must receive genuine private-key control, economic benefit and price risk.
A £55,000 transfer value does not create a £55,000 cost for the recipient. In the example, Daniel receives BTC with Priya's £12,000 allowable cost, leaving a £43,000 latent gain at the date of transfer.
Worked example: transfer before sale versus sale
Priya bought 1 BTC for £12,000, including allowable purchase fees, and it is worth £55,000 when she transfers it to Daniel, her spouse, while they are living together.
- The Section 58 TCGA 1992 no gain/no loss rule means Priya has no immediate UK crypto Capital Gains Tax charge, and Daniel receives the BTC with Priya's £12,000 allowable cost, not a £55,000 cost. If Daniel later sells for £60,000 and has no other gains, his gain before reliefs is £48,000. If the relevant CGT annual exempt amount is available, it can reduce that taxable gain.
- His Income Tax band then determines the applicable CGT rate. If Priya had sold for £55,000 before transferring cash, her £43,000 gain would instead have remained taxable on Priya. The transfer therefore creates a deferred capital gain in Daniel's hands.
- It does not make the £43,000 gain disappear.
Applying pooling rules to part of a crypto
For a partial spousal crypto transfer, calculate the sender's matched acquisition cost before treating the transferred amount as moving to the recipient. Suppose Alex holds 1 BTC bought for £20,000 and later buys another 1 BTC for £40,000, creating a £60,000 Section 104 holding of 2 BTC. A transfer of 0.4 BTC will ordinarily take 0.4/2 of the pooled cost, or £12,000, where no later acquisitions alter the matching result. However, the same-day matching rule matches tokens acquired on the transfer date first, and the 30-day crypto rule can match relevant acquisitions made in the following 30 days before the balance is taken from the pool.
These Bitcoin pooling rules matter even though the transfer is no gain/no loss, because they establish the allowable cost that accompanies the quantity transferred. Retain a calculation showing quantities, dates, GBP costs and fees, and keep it with both spouses' records.
Record the transfer and avoid ownership traps
An on-chain transaction ID proves that tokens moved between addresses, but not why they moved or who beneficially owns them. Keep the original purchase data, wallet history, exchange records and cost calculation because they support the recipient's later disposal.
A same-day transfer checklist
Make a short signed note before or on the transfer date that matches the blockchain and exchange evidence.
- Confirm that both people are spouses or civil partners and check whether they are living together for the relevant tax year.
- Calculate the transferred token quantity and allowable cost using same-day, 30-day and Section 104 rules where needed.
- Send tokens from the sender's wallet or exchange account to an address or account controlled by the recipient.
- Save the TXID, both wallet addresses, date, time, token amount, network fee and GBP market value at that time.
- Save exchange CSV files, deposit confirmations and proof of each account holder's identity where an exchange is involved.
- Write: “On [date], [name] transferred [quantity and token] to [name], spouse/civil partner, with beneficial ownership passing in full. The parties intend no gain/no loss treatment under Section 58 TCGA 1992.”
- Store the sender's acquisition records and cost calculation with the recipient's future tax records.
Fees, gifts and cross-border cases
A transfer to a third party, including an adult child or unmarried partner, normally uses the market-value rule even where no money changes hands. Do not assume shared hardware wallets, seed phrases or household access prove a genuine ownership transfer.
Do not rely on this route if you are unmarried, have separated, are divorcing, hold crypto as trading stock, or either spouse has complex UK or overseas tax residence. Transfers involving a formal settlement, a non-UK resident spouse, or unclear beneficial ownership need advice from a UK tax adviser before the transaction.
Questions & answers
Can I gift crypto to my spouse tax-free?
Yes, usually with no immediate CGT if you are married or civil partners, living together, and beneficial ownership genuinely passes. Your spouse inherits your historic allowable cost.
Can I transfer bitcoin to my wife before selling?
Yes, a qualifying transfer can be made before a later Bitcoin sale without immediate CGT. Your wife must become the real owner and inherit your historic allowable cost.
Does my spouse get a new cost basis at market value?
No, a qualifying no gain/no loss transfer normally gives your spouse your original allowable cost. Transfer-day market value does not reset it.
Do unmarried partners get the same crypto tax treatment?
No, unmarried partners do not normally receive the Section 58 spouse and civil partner treatment. A gift can be a market-value disposal for CGT.
Do I need to tell HMRC about the transfer?
A qualifying transfer alone does not usually create a CGT figure to report, but records are needed for the recipient's later sale and any HMRC enquiry.
What records prove a transfer was to my spouse?
Keep the TXID, wallet addresses, date and GBP value, exchange statements, account identities and a signed ownership note.
What happens if we are separating?
The answer depends on the separation date, tax year and any formal agreement. Rules changed from 6 April 2023, so obtain advice before moving crypto.
Act before the sale, with the full paper trail
A spouse transfer can reduce a household CGT bill only when it is real, completed before the taxable sale and backed by a correct historic-cost calculation. Treat it as a change of owner, not as moving coins between your own pockets.
