Separation and divorce: what happens to your tax

Separation and divorce change how the tax system treats transfers of money, property and investments between two people who were previously treated as a single economic unit. While a married couple or civil partnership lives together, moving assets between them is largely tax-neutral. Once they stop living together, that treatment continues only for a limited window, and after that transfers are taxed as if they were sales to a stranger.

The rules that matter most are about Capital Gains Tax (CGT). Separating spouses or civil partners can make "no gain, no loss" transfers for up to three years after the end of the tax year in which they stopped living together, and for an unlimited time for assets covered by a formal divorce agreement¹. Outside those windows, transfers take place at market value under the normal CGT rules². Separation also affects the Marriage Allowance, which continues automatically until it is cancelled³, and it changes how jointly owned assets and the family home are treated.

Transfers between spouses are tax-free while you live together

While a married couple or civil partners are living together, the tax system treats them as a single unit for many purposes. A transfer of ownership of an asset between them does not give rise to a chargeable gain: the receiving spouse steps into the giver's shoes, taking over the same cost and the same history of ownership. HMRC's guidance on life insurance policies states the principle directly: "the transfer of ownership of a policy between spouses or civil partners who are living together does not give rise to a gain"⁶. The same principle underpins the treatment of other assets.

Gifts to a husband, wife or civil partner are usually not taxed for CGT purposes, and this extends to most transfers made while the couple live together⁵. In practice this means a couple can rearrange who holds what, moving shares, second properties, investments or possessions between them, without triggering a tax charge at the time. Any gain is not eliminated, it is deferred: the recipient is treated as having acquired the asset at the giver's original cost, so the gain comes into account when the recipient eventually sells.

This is the baseline against which everything after separation is measured. The treatment exists because the law assumes a couple living together shares their economic resources. Once that assumption breaks down, the rules change, and the date the couple stop living together becomes the pivot for the whole regime.

Separating starts a limited window for tax-free transfers

The tax year in which a couple stop living together matters more than the date of the divorce itself. A tax year runs from 6 April to 5 April the following year. For the remainder of the tax year in which they stop living together, and for up to three years after the end of that tax year, separating spouses or civil partners can continue to make no gain, no loss transfers of assets between them¹. The government's policy paper on these rules states their purpose plainly: "This makes the process fairer for those spouses who are separating or divorcing and are in process of distributing assets between themselves"¹.

Where the assets are the subject of a formal divorce agreement, the window is unlimited: transfers covered by such an agreement retain the no gain, no loss treatment however long the agreement takes to implement¹. This matters because financial settlements often take years to finalise, particularly where property or pensions are involved.

Once the windows close, transfers take place at market value in accordance with the normal CGT rules². That means a transfer to an ex-partner is treated as a sale at the asset's open market value, even if no money changes hands. If the asset has grown in value since it was acquired, the partner transferring it can face a CGT bill on a gain they have never received cash for. The Office of Tax Simplification's review of Capital Gains Tax noted that around 500,000 taxpayers are required to report disposals each year, and the interaction of separation with these rules was one of the practical issues it examined².

Selling or transferring the family home: main home relief

The family home is usually the largest asset in a separation, and it is also the one with its own tax relief. You may get tax relief if you sold a property that was your main home, which removes or reduces the gain that would otherwise be chargeable⁸. Private residence relief is one of the largest tax reliefs in the UK, providing £31 billion of relief in the 2023 to 2024 tax year, and its stated objective is "to encourage home ownership and mobility of labour"⁹.

MoneyHelper sets out the four main options for the family home in a divorce or dissolution¹⁰:

1. Sell the home and both partners move out.
2. One partner buys the other out.
3. Keep the home without changing ownership.
4. Transfer part of the property's value from one partner to the other.

The tax consequences differ between these options. A sale by both owners is a disposal by each of their own shares, with main home relief available to each for the period the property was their main home. A buyout or transfer is a disposal by the partner giving up their share, and whether a gain arises depends on whether the transfer falls inside the no gain, no loss windows described above. A transfer covered by a formal divorce agreement keeps its tax-free treatment indefinitely¹.

Timing matters for the partner who moves out. Main home relief can continue to shelter a period of absence in certain circumstances, but the rules have limits, and a long gap between moving out and the transfer being completed can leave part of the gain chargeable. The dedicated page on private residence relief covers how the relief works, and selling a second property covers homes that were never a main residence. Where the property was occupied by a dependent relative, relief may also be available⁵.

Capital gains tax rates: 18% and 24%

For disposals of assets other than residential property, the CGT rates are 18% for taxpayers whose income puts them at basic rate, and 24% for higher rate taxpayers⁴. These are the rates that apply to gains on shares and most other assets. The rates were changed at Autumn Budget 2024: for disposals made on or after 30 October 2024, the rates on assets other than property rose from 10% and 20% to 18% and 24%¹¹. Disposals made before that date are taxed at the earlier rates.

Which rate applies to a particular gain depends on where the gain sits in relation to the taxpayer's income tax bands. A gain is added to income to work out how much of it falls above the basic rate threshold, so a person with modest income may pay 18% on part of a gain and 24% on the rest. The income tax page explains how the bands work.

There are separate rates for particular categories. Gains that qualify for business asset disposal relief are taxed at 14%⁴, and gains on carried interest are taxed at 32%⁴. These are unlikely to feature in most divorce settlements, but they matter where a separating spouse holds a business or investment fund interests.

Annual exempt amount: £3,000 each

Each person has an annual exempt amount for Capital Gains Tax of £3,000⁴, confirmed in the Autumn Budget 2024 documents¹¹. This is the amount of gain a person can realise in a tax year before CGT becomes payable, and it cannot be carried forward or transferred between people. Most trustees have a lower exempt amount of £1,500⁴.

The exempt amount was reduced from £12,300 to £3,000 by policy decisions announced in recent Budgets⁹. The practical effect for a separating couple is significant. Under the old allowance, most transfers of modest assets fell below the threshold; at £3,000, a transfer of appreciated shares or a buyout of a share of a property can produce a chargeable gain even where the asset is not the main home.

Because each spouse has their own exempt amount, the timing of disposals across tax years can change how much gain is sheltered. A gain realised in one tax year uses that year's allowance only. The Capital Gains Tax page covers the allowance in more detail.

Jointly owned assets: you pay only on your share

Where an asset is owned jointly, each owner is chargeable on their own share of the gain, not on the whole. For married couples and civil partners living together, the tax rules say that income from jointly owned property must be split and taxed in equal shares, 50:50¹². The same equal split applies to interest earned in a joint account, which is usually divided equally between the account holders, with tax only due if a person's share exceeds their allowance¹³.

For jointly owned possessions, there is a specific rule: you are exempt from paying tax on the first £6,000 of your share if you own a possession with other people¹⁴. So if two people sell a jointly owned possession for £12,000, each person's share of £6,000 falls within the exemption and neither pays CGT on it.

The 50:50 rule for property income applies while the couple live together. After separation, the equal split no longer applies automatically, and each owner is taxed on their actual share. This matters for buy-to-let properties held jointly, where the rental income and any eventual gain follow the real ownership split rather than an assumed half each. The rental income page covers how jointly owned property income is taxed.

Shares, investments and ISAs in a settlement

Investments are often split in a divorce, and their tax treatment varies by wrapper. Investments held in an Individual Savings Account (ISA) are tax exempt: individuals do not pay tax on capital gains arising on their disposals of ISA investments¹⁵. ISAs are tax exempt on interest, dividends and capital gains¹⁵. A transfer of ISA holdings to an ex-partner is not possible in the same way as a cash transfer, because an ISA belongs to the individual holder; the assets would need to be sold and the proceeds transferred, which is tax-free within the wrapper.

Shares held outside an ISA are different. A transfer of shares between separating spouses within the no gain, no loss windows takes place without a charge¹. Outside those windows, the transfer is a disposal at market value², and the gain is worked out using the normal rules for shares, including the same-day and 30-day matching rules set out in HMRC's shares helpsheet¹⁶. Where shares came from an employee share scheme, the position can be more complicated: shares held in a Share Incentive Plan cannot be transferred to others while they remain in the plan, and after removal a transfer to anyone other than a spouse or civil partner may attract CGT on any gain¹⁷. CGT on such shares is payable by 31 January after the end of the tax year in which they are sold¹⁷.

The investing section explains how these wrappers work, and ISAs covers the rules for the accounts themselves.

Marriage Allowance after separation: cancel or backdate

Marriage Allowance lets one partner transfer £1,260 of their Personal Allowance to the other, reducing the recipient's tax by up to £252 per tax year³. It is available where the recipient is not a higher rate or additional rate taxpayer. In England, Wales and Northern Ireland this usually means the recipient's income is between £12,571 and £50,270; in Scotland the recipient must pay the starter, basic or intermediate rate, usually meaning income between £12,571 and £43,662³.

The claim does not end when a couple separate. Your Personal Allowance will transfer automatically to your partner every year until you cancel Marriage Allowance³. This means a separated couple can carry on transferring an allowance between them, reducing one ex-partner's tax at the other's expense, unless one of them cancels it. Cancelling is done through HMRC, and the Marriage Allowance page explains how the claim works in full.

A claim can be backdated to 6 April 2022, the start of the 2022 to 2023 tax year³. Backdating only helps for tax years in which the couple still qualified, so it is mainly relevant where a claim was never made during the marriage rather than after separation. Note also that Marriage Allowance cannot be claimed by a couple living together who are not married or in a civil partnership³.

Where Child Benefit is involved, HMRC operates a limited information service. You can ask HMRC whether your partner or ex-partner receives Child Benefit or has a higher income than you, and HMRC will reply yes or no without giving financial information or a National Insurance number. You can only ask for this if you and your partner either live together, or separated within the tax year you want information for¹⁸. This matters for the High Income Child Benefit Charge, where one partner's income affects the other's tax.

Reporting and paying capital gains tax

You do not get a bill for Capital Gains Tax: you have to work out your own liability and report it⁸. How you report and pay depends on whether you sold UK residential property¹⁹.

For most sales of UK property on or after 6 April 2020, you must report and pay any CGT within 60 days⁵. For other chargeable assets, such as shares sold outside an ISA, the tax is payable by 31 January after the end of the tax year in which the disposal took place¹⁷, through Self Assessment.

When reporting, you need the details of how much you bought and sold the asset for, the dates you took ownership and disposed of it, other relevant details such as costs of buying, selling or making improvements and any tax reliefs, and the calculations for each gain or loss you report¹⁹.

A point that catches many people: a disposal at market value to an ex-partner outside the no gain, no loss windows is still a disposal, even though no money changed hands². It must be reported if a gain arises, and the 60-day rule applies if the asset is UK residential property. Losses can be set against gains under the normal rules, and the capital losses page covers the claim deadline. The reporting Capital Gains Tax page gives the process step by step.

Budget changes and the timing of a settlement

Capital Gains Tax rates and reliefs are not fixed, and they have changed repeatedly at recent Budgets. The Autumn Budget 2024 changed the main rates on assets other than property with effect from 30 October 2024¹¹, and Budget 2025 announced further changes, including reducing capital gains tax relief on qualifying disposals to employee ownership trusts from 100% to 50% from 26 November 2025²⁰. Changes to tax rates for property, savings and dividend income were announced at Budget 2025²¹.

For a couple in the middle of a settlement, this creates a timing risk. A settlement agreed in principle but not completed can be affected by a rate change announced in between, because the rates that apply are generally those in force at the date of the disposal. A transfer completed inside the no gain, no loss window is unaffected by rate changes, since no gain arises at all; a transfer that falls outside the window is taxed at whatever rates apply when it happens. A Budget was scheduled for 28 October 2026, with reported calls for capital gains tax to rise in line with income tax rates, so anyone with a settlement in progress may find the rules move before it completes.

The annual exempt amount itself has been cut in stages, from £12,300 to £3,000⁹, which shows how quickly the landscape can shift. Where a settlement involves a business, the business asset disposal relief rate of 14%⁴ and its lifetime limit, lowered from £10 million to £1 million from 11 March 2020⁹, are also exposed to change.

Where to get help

Free, impartial help is available. MoneyHelper, the government-backed money guidance service, offers a free pensions and divorce appointment service, guiding people on their next steps, including where to find additional help and how to access regulated financial advice if needed²². The Money Advice and Pensions Service has noted that just four in ten people are aware that pensions can be part of a divorce settlement²², so the appointment is a useful starting point even where pensions seem straightforward. The pensions section covers how pensions are divided.

For the tax itself, HMRC's guidance pages on transfers between separating spouses¹ and on reporting and paying CGT¹⁹ are the authoritative references. Where a dispute with HMRC arises, the complaining about HMRC page sets out the complaint route and the Adjudicator.

One caution on payment arrangements: HMRC's Time to Pay scheme in Scotland excludes money owed to do with divorce or maintenance, along with income tax, VAT and car tax²³, so a CGT bill arising from a settlement should not be assumed to qualify for instalment arrangements. Where the amounts are large or the assets complex, a solicitor or an accountant who deals with divorce settlements is the right professional to consult, and legal advice is recommended where debt recovery across borders is involved.