Transferring Shares to a Spouse UK 2026/27: CGT Exemption

The No Gain No Loss Rule: What It Means in Practice

One of the most useful -- and often underused -- Capital Gains Tax rules in the UK relates to transfers of assets between spouses and civil partners. When you transfer shares (or any other chargeable asset) to your spouse or civil partner while you are living together, HMRC treats the disposal as taking place at a figure that produces neither a gain nor a loss for the person making the transfer.

In plain terms: no CGT is triggered at the moment of transfer. You do not need to report a gain. You do not pay tax. The shares simply move from your name to your partner's name without any immediate tax cost, regardless of how much the shares have increased in value since you bought them.

This rule is not a tax exemption in the traditional sense -- it is a deferral mechanism. The gain does not disappear. Instead, your spouse takes on your original acquisition cost as their own base cost. When they eventually sell the shares, any gain is calculated from your original purchase price, not from the market value at the time of the transfer. The tax is deferred until a taxable disposal takes place.

For 2026/27 this remains one of the most straightforward and legitimate CGT planning tools available to married couples and civil partners in the UK.

How the Base Cost Transfer Works

To understand why the base cost matters, consider a simple example. You bought 1,000 shares in a company for GBP 5,000 three years ago. They are now worth GBP 20,000, giving you an unrealised gain of GBP 15,000. If you sold the shares yourself, you would have a gain of GBP 15,000, offset by your GBP 3,000 Annual Exempt Amount, leaving GBP 12,000 taxable. At the higher-rate CGT rate of 24% (for non-residential assets in 2026/27), that is a tax bill of GBP 2,880.

If instead you transfer the shares to your spouse, no CGT arises on the transfer. Your spouse receives the shares with a base cost of GBP 5,000 -- your original cost -- not GBP 20,000. If they then sell the shares for GBP 20,000, they have the same GBP 15,000 gain, but they can offset it against their own GBP 3,000 AEA. If they are a basic-rate taxpayer, the remaining GBP 12,000 is taxable at 18%, giving a bill of GBP 2,160 rather than GBP 2,880 -- a saving of GBP 720 purely through the rate difference.

If both partners sell different tranches of shares in the same tax year, each using their own GBP 3,000 AEA, the combined exemption doubles to GBP 6,000. On GBP 6,000 of gains that would otherwise be taxable at 24%, that saves GBP 1,440 in a single year.

Use the CalcHub Capital Gains Tax Calculator to model your specific gain, rate and AEA position before deciding whether to transfer shares to your spouse.

Conditions That Must Be Met

The no gain, no loss treatment does not apply automatically to all couples. You must satisfy two conditions at the time of the transfer.

Condition 1: Legal marriage or civil partnership. The rule applies only to legally married couples and registered civil partners. Unmarried couples who live together -- however long-established their relationship -- are treated as unconnected individuals for CGT purposes. Any transfer between them is a disposal at market value. If they have made large gains this can create a substantial and unexpected CGT bill.

Condition 2: Living together. The couple must be living together at the time of the transfer. HMRC defines "living together" for tax purposes as not being separated under a court order, a formal deed of separation, or in circumstances likely to result in permanent separation. If you are separated but not yet divorced, and you transfer shares to your estranged spouse, you may still qualify provided neither of the above separation tests has been met. However, this is a fact-specific area and it is worth taking advice if separation is involved.

If you transfer shares to an ex-spouse after divorce, the no gain, no loss treatment does not apply. The transfer is a disposal at market value and CGT applies in the normal way.

Using Both Annual Exempt Amounts Effectively

The GBP 3,000 Annual Exempt Amount for 2026/27 is modest compared to earlier years -- it stood at GBP 12,300 as recently as 2022/23 and has been cut sharply since. With a smaller AEA, the ability to use two of them in a couple becomes proportionally more valuable.

The most effective approach is to transfer shares before sale so that both partners can each crystallise up to GBP 3,000 of gains in the same tax year without paying CGT. Timing matters -- the transfer to your spouse should normally take place in the same tax year as the planned sale, but before the sale itself occurs. Once your spouse holds the shares, they make the disposal and use their own AEA.

It is important that the transfer is genuine and not a sham. HMRC requires that the shares be legally transferred into the spouse's name with all the associated rights and ownership. A nominal or paper transfer without actual legal ownership passing would not qualify. In practice, for shares held in a nominee account or ISA wrapper, you will need to instruct your broker or platform to make the transfer -- it cannot be done informally.

Note also that shares held inside an ISA cannot be transferred between spouses using this route. ISA assets can only be passed between spouses in limited circumstances (primarily on death via an Additional Permitted Subscription). For shares outside an ISA, the transfer mechanism is straightforward and most brokers handle it routinely.

Interaction With Dividend Income and ISAs

Transferring shares to a spouse does more than defer CGT -- it also shifts the future dividend income to your partner. If your spouse is a basic-rate taxpayer, dividends above the GBP 500 annual dividend allowance will be taxed at 8.75% rather than the 33.75% higher-rate or 39.35% additional-rate that would apply in your hands. Over time this can represent a significant saving on income from a dividend-paying shareholding.

This is a legitimate and established form of income splitting between couples. It is most effective where one partner is a non-taxpayer or basic-rate taxpayer and the other is in the higher or additional rate band. HMRC is aware of this planning and periodically reviews settlements legislation in this area, but straightforward transfers of shares between spouses without conditions or arrangements to retain the benefit do not trigger the settlements rules.

For dividends in 2026/27, the allowance stands at GBP 500 per person. Using two allowances across a couple means GBP 1,000 of dividend income can be received tax-free rather than GBP 500. Above those allowances, basic-rate taxpayers pay 8.75%, higher-rate taxpayers pay 33.75%, and additional-rate taxpayers pay 39.35%.

Use the CalcHub Dividend Tax Calculator to see the after-tax income from a shareholding depending on which partner receives it.

What Happens on Death

The no gain, no loss rule also applies to transfers of assets between spouses on death in a different form -- assets passing to a surviving spouse are exempt from Inheritance Tax entirely under the spousal exemption. However, for CGT purposes, the treatment on death is different. Assets passing to any beneficiary (including a surviving spouse) on death are rebased to their market value at the date of death. This means any accrued gain up to that point is wiped out for CGT purposes.

The IHT spousal exemption means no IHT is due when assets pass between spouses regardless of value, but the IHT Nil Rate Band of GBP 325,000 and the Residence Nil Rate Band of GBP 175,000 can be transferred to the surviving spouse's estate, potentially giving a combined nil-rate band of GBP 1,000,000 when applied to the survivor's estate.

For shares specifically, the CGT rebase on death combined with IHT planning can make the timing of asset transfers within a couple an important part of broader estate planning. If you hold shares with very large unrealised gains, retaining them until death and passing them to a spouse or other beneficiary achieves a CGT wipe-out that a lifetime transfer does not.

Keeping Records of Transfers

HMRC requires that you keep records of any asset transfer between spouses, including the date of transfer, a description of the assets, and the original base cost. For shares this means keeping your original contract notes or purchase confirmations so the base cost can be established when your spouse eventually sells.

If you bought shares in tranches at different prices, the share pooling rules apply in the same way they would for your own disposal -- the base cost of the pool is the average cost of all shares acquired and still held. Your spouse inherits that pooled base cost, not just the cost of the specific shares transferred.

Use the CalcHub CGT Calculator to input your share pool data and calculate the taxable gain your spouse would face on a future sale based on the inherited base cost.