Many crypto investors know that HMRC’s 30-day matching rule prevents you from selling a token to realise a gain or loss and then immediately buying it back in your own name. The rule was introduced to stop short-term “bed & breakfasting” arrangements designed purely to refresh base cost.
However, for married couples and civil partners, the position is more nuanced. Because Capital Gains Tax is assessed on individuals rather than households, coordinated planning between spouses can produce tax outcomes that would not be available to a single investor. When structured correctly, this can allow couples to use combined exemptions and losses more efficiently while maintaining long-term exposure to crypto assets. This approach is commonly referred to as the bed & spouse strategy.
In this article, we explain how the bed & spouse strategy works, how it can be used to crystallise gains or losses, and the practical considerations to understand before implementing it.
Contents
- 1. What the Bed & Spouse Strategy Is
- 2. Using It to Crystallise Gains
- 3. Using It to Crystallise Losses
- 4. Key Considerations
- Conclusion
1. What the Bed & Spouse Strategy Is
The matching rules for capital gains tax (CGT) prevent you from selling and then shortly buying back the same asset in your own name. If you do, the sam-day or 30-day matching rules apply. This means the disposal will be matched against your repurchase, and you won’t achieve the intended gain or loss crystallisation.
The bed & spouse strategy works because the rules only apply within a single taxpayer’s transactions. If Spouse A sells and Spouse B buys back, HMRC treats them as separate individuals. Spouse A has made a disposal, and Spouse B has acquired a new holding at the current market value. The couple’s overall exposure is unchanged, but the family unit has achieved a tax outcome that wouldn’t be possible for a single person.
This makes it a useful planning tool for couples who want to manage their tax position without giving up their long-term investment strategy.
2. Using It to Crystallise Gains
One of the most common uses of the bed & spouse strategy is to realise gains up to the annual exemption. For 2025/26, each individual has a CGT allowance of £3,000. By selling assets that have gone up in value, you can lock in a tax-free gain.
Example: Crystallising gains without losing exposureSpouse A holds Bitcoin bought for £3,000, now worth £6,000. They want to benefit from the £3,000 annual exemption, but do not want to lose exposure to Bitcoin.
Using the bed & spouse strategy, Spouse A sells, realising a £3,000 gain that is fully covered by their exemption. Spouse B later buys £6,000 of Bitcoin at the new market value.
Result: the household still holds Bitcoin, Spouse A has banked a tax-free gain, and the holding now has a higher base cost of £6,000.
This approach can also be effective if you have already crystallised losses in the same tax year and want to step up the base cost of another token without triggering a taxable gain.
Example: Crystallising gains to use up losses without losing exposureSpouse A has crystallised net losses of £10,000 so far in the year. They also hold Bitcoin bought for £10,000, now worth £23,000.
Using the bed & spouse strategy, Spouse A sells, realising a gain of £13,000. This is reduced by their £10,000 losses, leaving a net gain of £3,000 — exactly covered by the annual exemption. Spouse B later buys £23,000 of Bitcoin at the new market value.
Result: the household still holds Bitcoin, Spouse A has fully used their losses without creating a tax charge, and the new holding has a stepped-up base cost of £23,000.
By structuring disposals in this way, couples can use allowances and losses more efficiently while maintaining their overall crypto exposure.
3. Using It to Crystallise Losses
The strategy is just as useful when investments fall in value. Realising a loss allows you to offset it against gains in the same year, or carry it forward to reduce future tax bills. If you sell and then buy back yourself, the 30-day rule prevents the loss from being banked.
With the bed & spouse approach, Spouse A can sell at a loss and Spouse B can immediately buy back, keeping the household invested while still capturing the tax benefit.
Example: Banking a loss while staying investedSpouse A has crystallised net gains of £10,000 so far in the year. They also hold Ethereum bought for £17,000, now worth £10,000, which they want to retain exposure to.
Using the bed & spouse strategy, Spouse A sells, realising a loss of £7,000. This reduces their other gains to £3,000 — exactly covered by the annual exemption. Spouse B later buys £10,000 of Ethereum at the new market value.
Result: the household maintains the same exposure to Ethereum but with a lower base cost of £10,000. Whilst this may increase a future tax charge on Ethereum, it has enabled Spouse A to avoid the immediate tax charge on their other gains.
This approach is particularly valuable in volatile markets, where losses can help reduce the tax due on realised gains elsewhere in the portfolio. The trade-off is that the base cost has reset lower, so any future recovery in value may create a larger CGT bill down the line.
4. Key Considerations
Although the mechanics of the bed & spouse strategy are relatively simple, the tax outcome can vary significantly depending on the couple’s wider financial position.
The strategy works best between spouses or civil partners, since transfers of cash or assets between them are generally made on a no gain, no loss basis. However, the transactions must represent genuine disposals and acquisitions. Each party must make an independent decision to sell or to buy, and the acquiring spouse must genuinely take on beneficial ownership. If the steps appear circular or lack commercial substance, HMRC may challenge the arrangement and deny the intended tax treatment.
Execution is equally important. It should be clear that Spouse A genuinely disposed of the asset and Spouse B genuinely acquired it. The transactions must reflect genuine market activity. In practice, this usually means using accounts held in each individual’s own name and retaining proper records of the transactions.
Finally, there are transaction costs to consider. Exchange fees and bid–ask spreads may appear small, but where the gains or losses involved are modest, they can materially reduce or even outweigh the tax benefit. Running the numbers in advance is essential.
Conclusion
The bed & spouse strategy can be a powerful planning tool for married couples and civil partners who want to manage gains, losses and allowances without materially altering their combined crypto exposure.
However, while the headline examples appear simple, the interaction between in-year gains, in-year losses and brought forward losses means the result is rarely as straightforward as it first seems.
When the numbers involved are modest, the benefit may be limited. When gains or losses are material, careful structuring can make a meaningful difference to the household’s overall tax position.
This strategy is typically considered alongside other planning approaches such as loss timing and CGT rate management. For a broader overview of how these interact, see our guide to tax planning for crypto investors.
If you are considering using the bed & spouse strategy and want clarity on how it would apply to your specific circumstances, we can model the tax outcome and ensure the strategy is implemented effectively as part of our crypto tax planning service.
