Transferring a property to your spouse or civil partner before selling it is one of the most widely used CGT planning strategies in the UK — and for good reason. When done correctly, it can save thousands of pounds. But the rules contain several traps, and a poorly timed transfer can backfire.
The basic rule: no gain, no loss on transfers between spouses
When you transfer a property to your spouse or civil partner, no CGT arises at the point of transfer. HMRC treats the transaction as a no-gain, no-loss disposal. Your spouse acquires the property at your original base cost, not at the current market value.
This is important. The gain is not wiped out — it is transferred. When your spouse eventually sells, they calculate the gain using your original acquisition cost, plus any allowable improvements you both made, plus the costs of sale.
Why the transfer still saves tax
If the gain is going to arise anyway when the property is sold, the advantage of a pre-sale transfer is that it splits the gain across two taxpayers. Each person has their own:
- Annual Exempt Amount — £3,000 for 2025/26. Two owners means up to £6,000 in tax-free gain.
- Basic rate band — if one spouse is a basic rate taxpayer, their share of the gain is taxed at 18% rather than 24%. On a £50,000 gain, that difference is £3,000.
For a couple with very different incomes, this can be substantial. If one spouse is a non-earner or low earner, transferring more of the property to them before sale can shift a significant portion of the gain into the 18% band.
The timing trap: you must transfer before exchange
The transfer must be completed (legally) before contracts are exchanged on the sale. For CGT purposes, the disposal date is the date of exchange of contracts — not completion. If you attempt to transfer to your spouse after exchange, the gain has already crystallised in the original owner's hands. The transfer is too late.
This catches people out regularly. If you are four weeks from exchange and your solicitor is already in progress, you need to act immediately. A straightforward transfer of equity between spouses can be completed in two to three weeks if all parties move quickly.
The conditions: you must be living together
The no-gain, no-loss rule only applies if you are living together as a couple. HMRC uses the tax year rule: if you are separated and living apart for the whole of a tax year, you no longer qualify for this treatment. Transfers in the tax year of separation may still qualify, but the position becomes fact-specific.
For couples in the process of separating, the CGT rules on divorce and separation are separate and more nuanced. See our guide on CGT and divorce.
What about the stamp duty and legal costs?
A transfer of equity between spouses generally attracts no Stamp Duty Land Tax if there is no mortgage, or if the mortgage transfer value stays below the SDLT threshold. Your conveyancing solicitor will confirm the position for your specific transaction. The legal costs of the transfer are themselves allowable deductions against the gain when the property is eventually sold.
Can I transfer only a share?
Yes. You do not have to transfer the whole property. Many couples transfer a portion — for example, moving from 100% / 0% ownership to 50% / 50%, or to a different split that reflects each spouse's marginal tax rate. The same no-gain, no-loss rules apply to a partial transfer.
Declaring a change in beneficial ownership requires a form 17 submission to HMRC, supported by a deed of trust. Without this, HMRC defaults to a 50/50 split for income tax purposes regardless of the legal title position.
Does this work for buy-to-let as well?
Yes — the same logic applies to rental properties. Some landlords restructure ownership shares between spouses before a sale to minimise CGT. If the property has also been let during ownership, the income tax position over the years should be reviewed alongside the CGT plan, as the ownership shares affect rental income reporting too.
Putting it all together
Transferring property to a spouse before selling is legitimate, well-established tax planning. It requires clean execution: legal transfer before exchange, the right ownership split documented correctly, and both parties reporting their respective gains within 60 days of completion.
If you are selling a property and want to understand whether a spousal transfer makes sense in your situation, speak to a Chartered Accountant/Chartered Tax Advisor before exchange — we can model the saving, advise on the optimal split, and handle the 60-day CGT return for both of you on completion.