CryptoTax UK · Guide
Crypto tax for married couples and civil partners in the UK
One of the most underused legal tax planning strategies for UK crypto investors is the spouse transfer exemption. Married couples and civil partners can transfer crypto to each other completely free of Capital Gains Tax — and doing so at the right time can halve your overall tax bill. Educational only — not tax advice.
Calculate our combined crypto tax →The spouse exemption: how it works
HMRC's rules provide that transfers of assets between spouses and civil partners who live together are treated as taking place at a value that produces neither a gain nor a loss — effectively the original cost basis transfers to the recipient. No CGT is triggered on the transfer itself, regardless of how much the crypto has increased in value. This applies to all cryptoassets.
Doubling the CGT allowance
Each individual has a £3,000 annual CGT allowance. If one spouse holds all the crypto and sells it, only £3,000 of gains is exempt. But if crypto is transferred to the other spouse before disposal, both allowances can be used — potentially sheltering £6,000 of gains from CGT in a single tax year. With CGT rates of 18–24%, this can mean a legitimate saving of £540–£1,440 per year.
Using different tax bands
If one spouse is a higher-rate taxpayer (24% CGT) and the other is a basic-rate taxpayer (18% CGT), transferring crypto to the lower-rate spouse before disposal reduces the CGT rate on those gains. The transferred crypto takes the original cost basis, so the gain calculation remains the same — but the tax rate applied is lower.
The 'no gain no loss' rule and cost basis
When you transfer crypto to your spouse, they inherit your original cost basis — not the market value on the date of transfer. This means if they later sell the crypto, the gain is calculated from your original purchase price. The tax saving comes from using their allowance and/or lower rate — not from resetting the cost basis. Keep clear records of the original purchase cost to pass on.
Important caveats
The exemption only applies to couples who are legally married or civil partnered AND living together. Separated couples do not qualify after the end of the tax year of separation. The transfer must be a genuine gift — not a sham arrangement where the transferring spouse retains control. And while the transfer itself is tax-free, any subsequent sale by the receiving spouse is fully taxable.
Frequently asked questions
Can unmarried couples use each other's CGT allowance?
No. The no-gain-no-loss rule only applies to married couples and civil partners who live together. If you transfer crypto to an unmarried partner, it is treated as a disposal at market value — potentially triggering CGT on any gains up to that point.
Does my spouse need to file a tax return after receiving crypto?
Your spouse will need to declare any gains when they eventually sell or dispose of the crypto. If their gains exceed the £3,000 allowance, they will need to file a Self Assessment return or use the real-time CGT service. The transfer itself does not trigger a reporting requirement.
What records should I keep for spouse transfers?
Keep: the date of transfer, the quantity and type of crypto transferred, the original cost basis (what you paid for it), and the market value on the date of transfer. Both spouses should update their own transaction records to reflect the transfer.
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Calculate our combined crypto tax →Educational guidance only. CryptoTax UK is not a regulated tax adviser and the information above does not constitute tax, legal or financial advice. Always confirm your specific position with HMRC or a qualified accountant before filing.