Survivorship Clauses in Wills

A survivorship clause is a condition in a will that a beneficiary must live for a stated number of days after the testator, commonly 28 or 30, before their gift takes effect. If they die within that window, the gift fails and the will treats them as if they had not survived, so the property passes to the next person named instead.

Clauses like this are very common and exist to deal with a hard case: what happens when two people, often a married couple, die close together or in the same accident. Without one, an estate can pass briefly to someone who then dies days later, so it is administered and taxed twice and can end up with people the first person never intended. This guide explains how the clause works, the usual periods, the effect on inheritance tax, and the rules that apply when it is unclear who died first. It sits within our estate planning guide. Figures and rules are current as at July 2026 and are subject to change.

What is a survivorship clause?

It is wording in a will that makes a gift conditional on the beneficiary outliving the person who made the will by a fixed period. A typical clause reads that a beneficiary takes their share only "if they survive me by 28 days". If the beneficiary dies inside that period, the gift is read as though they had died first, so it falls to the substitute beneficiary or into the residue instead of into the beneficiary's own estate.

Why do people include one?

The main reason is to stop an estate passing twice in quick succession when two people die close together. Without a clause, if a wife outlives her husband by only a day, his estate passes to her, then straight into her own estate and on to her beneficiaries, who may not be the people he had in mind. A survivorship period avoids that double administration and keeps the estate on its intended path.

• Keeps gifts on track. Assets go to the people the will-maker actually chose, not through a beneficiary who barely outlived them.
• Avoids double administration. One short-lived inheritance does not have to be probated twice within weeks.
• Helps blended families. It reduces the chance of an estate skipping to a stepchild or in-law by accident. Many people setting up mirror wills ask about this.

How long is a survivorship period usually set?

Most clauses use a short window of 28 or 30 days, long enough to deal with a shared accident or overlapping illness but short enough not to hold up the estate. There is no fixed legal minimum for a will clause, but the period does have an outer limit for tax purposes: a survivorship condition must not exceed six months for the inheritance tax treatment described below to apply (gov.uk, IHT Manual IHTM16110, as at July 2026, subject to change).

Source: gov.uk, IHT Manual IHTM16110 (section 92 Inheritance Tax Act 1984), as at July 2026, subject to change.

How a survivorship clause affects inheritance tax

For inheritance tax, a short survivorship period is generally neutral. Where a will holds property on condition a beneficiary survives for a period not exceeding six months, the interim trust during that window is disregarded, and the gift that actually takes effect at the end is treated as taking effect on death (gov.uk, IHT Manual IHTM16110, as at July 2026, subject to change). So the estate is taxed as if the final destination applied from the outset.

This matters for couples. Transfers between spouses and civil partners are generally exempt, and any unused nil-rate band and residence nil-rate band can transfer to the survivor (gov.uk/inheritance-tax, as at July 2026, subject to change). Where a survivorship clause causes a gift to a spouse to fail because they did not outlive the period, that spouse exemption and the band transfer may be lost on that gift, so the clause needs to be read alongside the couple's wider planning. It can be worth discussing the interaction with a qualified professional.

Points people weigh when drafting one

A survivorship clause is a small piece of wording with knock-on effects, so it is usually considered as part of the whole will rather than in isolation. A period that is too long can delay administration and, past six months, changes the tax treatment. A clause that unintentionally cuts out the spouse can waste an exemption. Many people choose to have the clause drafted alongside their substitute gifts so the estate always has somewhere clear to go.

For the wider process of putting a will together, see our guide on How to Write a Will.

Survivorship clauses in Scotland and Northern Ireland

The idea of a survivorship clause works across the UK, but the background rules on simultaneous death differ. In Scotland, where two people die at the same time or it is uncertain who died first, neither is treated as having survived the other, under the Succession (Scotland) Act 2016 (legislation.gov.uk, Succession (Scotland) Act 2016 explanatory notes, as at July 2026, subject to change). That is a different presumption from the England and Wales age-based rule. Northern Ireland has its own succession law again. Inheritance tax is UK-wide, so the £325,000 nil-rate band and the six-month survivorship point apply throughout (gov.uk/inheritance-tax, as at July 2026, subject to change). Where an estate touches more than one UK nation, it can be worth taking advice in each.

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