Transferring Crypto to Your Spouse: UK Tax Rules

Gifting crypto to most people is a taxable disposal — but transfers between spouses and civil partners are a major exception, and one of the few legitimate ways to reduce a UK crypto tax bill.

The no gain, no loss rule

When you transfer a cryptoasset to your spouse or civil partner, HMRC treats it as happening at "no gain, no loss." You don't pay Capital Gains Tax on the transfer, and your partner inherits your original cost basis rather than the market value on the day. The gain isn't wiped out — it simply passes to them until they eventually dispose of the asset.

Why this is useful

Every individual has their own annual CGT allowance (£3,000 for 2025/26) and their own basic-rate band. If one partner has used up their allowance or is a higher-rate taxpayer, moving some crypto to a partner with unused allowance or a lower rate can cut the tax due on a later sale. Across a couple, that's potentially £6,000 of tax-free gains plus two sets of rate bands.

The conditions

The rule applies to legally married couples and registered civil partners who are living together at some point in the tax year. It does not apply to unmarried partners, however long-term — a transfer to them is a normal disposal at market value. The transfer must be a genuine gift, not a sale.

Records you still need

Even though no tax is due at transfer, record the date, the asset, the quantity, and your original pooled cost, because that cost moves with the coins. Your partner needs it to calculate their gain when they sell.

A simple example

You bought 1 ETH for £1,000 and transfer it to your spouse, who later sells for £2,500. Their gain is £1,500 — using your £1,000 cost — set against their own allowance, not yours. CryptoLens tracks cost basis across wallets so you can plan spousal transfers and see the household tax impact before you act.

This is general information, not personal tax advice.