How to Reduce Capital Gains Tax (CGT) with Spouse Transfers and Losses

You can reduce your Capital Gains Tax (CGT) bill by transferring ownership of appreciate assets to your spouse or civil partner and offsetting allowable capital losses. These strategies work together under HMRC rules to utilise two sets of tax-free allowances and lower tax bands, while lowering taxable gains. By coordinating these reliefs before making a sale, married couples can avoid paying unnecessary higher-rate CGT.

Key Takeaways: Reducing CGT in 2025/26

• The individual Annual Exempt Amount (AEA) for the 2025/26 tax year is set at £3,000 per person.
• The CGT rates for residential property and other chargeable gains are 18% for basic-rate taxpayers and 24% for higher-rate taxpayers.
• A married couple or civil partnership can combine their individual exemptions to protect up to £6,000 of capital gains from tax.
• Transferring assets to a lower-earning partner can shift taxable gains from the 24% bracket down to the 18% bracket.
• Utilising allowable capital losses alongside partner transfers maximizes overall tax relief.

How can I reduce my Capital Gains Tax bill using these strategies?

You can lower your CGT bill by sharing asset ownership with your partner before a sale and utilizing allowable capital losses to reduce taxable gains. Transferring assets allows couples to use two individual Annual Exempt Amounts and access the lower 18% tax band.

To achieve the maximum tax saving, you must complete any transfer of ownership before the contract for sale is signed. This allows both spouses to report their respective shares of the capital gain on their individual tax returns. You can further reduce these individual gains by deducting any allowable personal capital losses you or your spouse holds.

What is the 'No Gain/No Loss' rule for spouse transfers?

The "no gain/no loss" rule is a tax relief that allows spouses to transfer assets without triggering an immediate Capital Gains Tax charge. Under statutory rules, the recipient partner inherits the original acquisition cost of the asset.

According to Section 58 of the Taxation of Chargeable Gains Act 1992 (TCGA 1992), transfers of assets between spouses or civil partners who are living together are treated as giving rise to neither a gain nor a loss. The transferor does not pay any tax, and the transferee takes over the transferor\'s original base cost. When the receiving spouse eventually sells the asset to a third party, their taxable gain is calculated based on this original historic cost.

How to transfer assets to your spouse to lower CGT

Transferring assets to your spouse involves shifting legal ownership to access their unused tax allowance and preferential tax bands before a disposal occurs.

1. Determine the current legal ownership of the asset and calculate the estimated capital gain of the proposed sale.
2. Draft and sign a deed of gift or declaration of trust to transfer a specific percentage of the asset to your spouse.
3. Ensure the transfer is legally registered and completed fully before entering into any contract to sell the asset to a third party.
4. Report the separate portions of the gain on your respective Self Assessment tax returns, applying both £3,000 allowances.
5. Compute the tax due, utilizing your spouse\'s basic-rate tax band to pay 18% instead of the 24% higher rate where applicable.

Consider a worked example of this strategy. You are a higher-rate taxpayer and own a residential property that has gained £120,000. Selling the property in your name alone would trigger a 24% tax charge on most of the gain.

If you transfer 50% ownership to your spouse (who has no other taxable income) before the sale, you each realise a £60,000 gain. After each deducting the £3,000 Annual Exempt Amount, you both have a £57,000 taxable gain. Your spouse pays only 18% tax on the portion falling within their basic-rate band, while your portion is taxed at 24%, resulting in a significant overall household tax saving.

Does the gift to my spouse have to be genuine?

The gift must be unconditional and legally complete, meaning your spouse must have full, unrestricted rights to the asset and its proceeds. If the gift is deemed a sham, HMRC can tax the entire gain in your name.

To prevent tax avoidance, HMRC closely monitors spouse transfers under the Settlements Legislation in Section 624 of the Income Tax (Trading and Other Income) Act 2005 (ITTOIA 2005). If you retain an interest in the transferred asset or if your spouse passes the sale proceeds back to you, the transfer can be ignored for tax purposes. You must also be living together as married spouses or civil partners to qualify for this rule.

How do I offset capital losses against my gains?

You can offset capital losses against your taxable gains to lower your overall liability, but you must apply current-year and carried-forward losses differently. While current-year offsets are mandatory, carried-forward losses offer more tax planning flexibility.

When you realize a loss in the 2025/26 tax year, you must offset it against gains made in the same year. This rule applies even if the loss reduces your overall net gains below your tax-free £3,000 threshold, which can effectively waste your Annual Exempt Amount.

In contrast, carried-forward losses from previous years are only used to reduce your current-year gains down to the £3,000 limit. This rule preserves your annual exemption, allowing you to carry any remaining historical losses forward to future tax years.

What is the order of set-off for CGT losses?

HMRC requires tax filers to apply capital losses in a strict, sequential order to calculate final tax liabilities accurately. Following this order ensures you comply with legislation while preserving future tax reliefs.

1. Deduct all allowable capital losses of the current tax year from the capital gains of the same year.
2. Compare the remaining net gain against the individual £3,000 Annual Exempt Amount.
3. If the remaining gain exceeds £3,000, apply historical carried-forward losses only until the taxable gain is reduced to exactly £3,000.
4. Apply the £3,000 Annual Exempt Amount to reduce the final taxable gain to nil, transferring any unused historical losses to the next tax year.

How and when must I claim capital losses to HMRC?

You must claim capital losses by reporting them through your Annual Self Assessment tax return or by writing to HMRC. Under UK law, there is a strict time limit for registering past losses.

You must report a capital loss to HMRC within four years from the end of the tax year in which the loss occurred. For example, a loss realised in the 2021/22 tax year must be claimed on or before 5 April 2027. If you do not claim the loss within this statutory window, you cannot use it to offset future gains.

What are the risks of using spouse transfers and loss offsets?

While spouse transfers and loss offsets are effective tax planning tools, they contain potential risks that can lead to unexpected tax charges or HMRC penalties.