The family home carries more financial weight in a divorce than almost any other asset. It is usually the largest single item in the settlement, frequently the most emotionally charged, and the one where the tax consequences are least well understood. Private Residence Relief, the mechanism that exempts most people from paying capital gains tax when they sell their main home, does not disappear the moment a marriage ends. But it can erode significantly depending on what happens, when it happens, and how the arrangements are documented.
The Baseline
How Private Residence Relief Works in Normal Circumstances
Private Residence Relief, sometimes called PPR or Principal Private Residence Relief, exempts the gain made on the sale of your main home from capital gains tax. If a property has been your only or main residence throughout the entire period you have owned it, the full gain is sheltered. No CGT to pay, no reporting required beyond the sale itself.
There is also a final period exemption built into the rules. For the last nine months of ownership, PPR applies regardless of whether you are still living in the property. So even if you have moved out nine months before the sale completes, your entitlement to full relief is preserved for that period. This was originally eighteen months, reduced to nine months in April 2020, and it matters enormously in the context of separation.
The nine-month final period is not a luxury. For a departing spouse, it is often the only thing standing between a clean exit and an unexpected capital gains tax bill on a home they have not lived in for months.
When both spouses remain in the property until it is sold, and neither has bought another home in the meantime, PPR applies in full to both parties. No CGT. No complications. The problems begin the moment one person moves out.
The Complication
What Happens When One of You Leaves
The spouse who moves out stops accruing PPR from the date they leave. Their entitlement to full relief is preserved for the nine months after departure, thanks to the final period exemption. After that, any further period they remain off the title but the property sits unsold creates what is called a period of absence, and that absence is not automatically covered by PPR.
This matters because divorce takes time. The process of reaching a financial settlement, obtaining a consent order, valuing the property, and completing a transfer or sale rarely happens within nine months of one person leaving. A spouse who moves out in January and whose former home does not sell until two years later may find that a proportion of their share of the gain falls outside PPR and becomes subject to CGT at 18% or 24%, depending on their tax rate.
There is a further trap for those who buy a new home quickly. If the departing spouse purchases a new main residence and elects it as such, they lose the ability to claim PPR on the former family home for any period after that election. They cannot simultaneously protect two properties. Buying somewhere new before the family home is sold or transferred is one of the most common ways people inadvertently create a CGT liability they did not know they were incurring.
The 2023 Reforms
How the Rules Changed, and Why It Matters
The Finance Act 2023 introduced significant changes to how CGT and PPR interact in the context of separation and divorce, effective from 6 April 2023. These reforms were the most meaningful improvement to the rules for divorcing couples in decades, addressing situations that had previously resulted in unnecessary and punitive tax bills at an already difficult time.
The most important change for the family home is this: a departing spouse who transfers their interest to the spouse remaining in the property, under a formal divorce agreement or court order, can now claim PPR for the entire period from when they moved out to when the transfer takes place, even if that period extends well beyond nine months. The court order removes the time pressure. Without a court order, the nine-month window applies.
A second change protects those in deferred sale arrangements, where the family home is retained for a period after separation, often because children are living there, with an agreement that the proceeds will be split when it eventually sells. Under the old rules, the departing spouse could lose PPR on their share of the gain for the years between leaving and the eventual sale. Under the 2023 reforms, the departing spouse can apply the same PPR treatment to their share of the sale proceeds that would have applied at the point of departure, provided the arrangement is part of a formal divorce agreement.
The condition that matters most. Both protections, the extended period for transfers and the deferred sale treatment, depend on the arrangement being formalised through a court order or consent order. An informal agreement, even one that both parties consider binding, does not attract the same relief. If you are negotiating a financial settlement that involves the family home, obtaining a consent order is not optional from a tax perspective.
There is a further condition for the extended PPR relief on transfers: the departing spouse must not have elected another property as their main residence for the period after they left. If they have bought and elected a new home, the protection no longer applies to the former family home for that period.
The Broader Point
The Home Is a Tax Question as Much as a Legal One
What happens to the family home in a divorce settlement is decided in negotiation between solicitors, and ratified by the court. But the tax consequences of that decision are determined by timing, documentation, and choices made in the months before and after separation that most people do not think of as tax decisions at all.
When one of you moves out. Whether you buy another property before the sale completes. Whether the arrangement is captured in a consent order or left informal. Whether you elect a new main residence. Each of these has a direct bearing on your PPR position, and none of them is reversed once the moment has passed. The advice to take tax counsel early in a separation is not a formality. In the context of the family home, it is where significant sums are protected or lost.
The guide below sets out the key PPR scenarios for divorcing couples in plain terms.