Should your Will include a survivorship clause?
Last verified: April 2026 (England & Wales)
A survivorship clause can look like a harmless standard Will clause. Sometimes it is useful. Sometimes it creates the tax or family problem it was meant to avoid.
The mistake is treating it as automatic.
At Fern Wills & LPAs, the starting point is not “always include one” or “never include one”. The starting point is to check the couple’s legal status, family structure, estate values, property ownership and ultimate beneficiaries before deciding whether a survivorship clause helps or harms.
Quick-read summary
• A survivorship clause means a beneficiary only inherits if they survive the person making the Will by a set period, often 28 or 30 days.
• For married couples and civil partners leaving everything to each other first, a survivorship clause is often unnecessary and can sometimes create an inheritance tax problem.
• For unmarried partners, a survivorship clause is often the sensible starting point because there is no spouse exemption and no transferable nil-rate band between them.
• Unequal estate values are a major warning sign. If one spouse has significantly more wealth than the other, a survivorship clause can waste valuable tax allowances.
• Different secondary beneficiaries need careful thought. A survivorship clause may protect each person’s preferred side of the family, but it may also have tax consequences.
• The correct question is not “Do we use survivorship clauses?” The correct question is “What happens if one of you dies, then the other dies days or weeks later?”
What is a survivorship clause?
A survivorship clause makes a gift conditional on the beneficiary surviving the person making the Will for a set period.
For example, a Will might leave everything to a spouse, civil partner or partner only if they survive by 30 days. If they die within that period, they are treated as if they had died first, so the gift passes to the next named beneficiaries instead.
That can be helpful in some situations. It can avoid assets passing through two estates in very quick succession. It can also give some control over where the first person’s estate goes if the intended beneficiary dies shortly afterwards.
But that control is limited. A 30-day clause only controls what happens during those 30 days. It does not protect assets long-term. It does not stop a surviving spouse or partner changing their own Will later. It does not solve blended-family planning by itself.
Why survivorship clauses are used
Survivorship clauses are usually used for two reasons.
First, they can reduce double administration. If the first person dies, then the beneficiary dies shortly afterwards, the clause may stop the same assets having to pass through both estates.
Second, they can help control where the assets go if the first beneficiary dies very soon after the person making the Will.
Those are sensible aims. The problem is that inheritance tax and family facts can change the answer completely.
Married couples and civil partners: usually slow down
For married couples and civil partners, a survivorship clause should not be added automatically.
That is because gifts between spouses and civil partners are usually free of inheritance tax under the spouse exemption. If the first spouse leaves everything to the survivor, the first estate may pass IHT-free, and any unused nil-rate band may be transferable to the survivor’s estate.
A survivorship clause can interrupt that.
If the surviving spouse or civil partner dies within the survivorship period, the first estate may bypass them and pass straight to children, stepchildren, nieces, nephews, charities or other substitute beneficiaries. That can be exactly what the couple wanted in some cases, but it can also waste the spouse exemption and reduce the tax allowances available later.
The danger is sharper where one spouse has significantly more wealth than the other.
Married or civil partner does not mean “never use a survivorship clause”. It means “do not include it without checking the tax and family consequences first.”
Unmarried partners: often useful, but still not automatic
Unmarried partners are different.
They do not have the spouse exemption. They also cannot transfer unused nil-rate band or unused residence nil-rate band to each other in the same way married couples and civil partners can.
That means a survivorship clause is often the sensible starting point for unmarried partners, especially where both Wills leave everything to each other first and then to the same ultimate beneficiaries.
Without a survivorship clause, the first partner’s estate may pass to the survivor, then be taxed again when the survivor dies. If the survivor dies shortly afterwards, the same assets can be pulled through two estates in quick succession.
A survivorship clause can help the first estate bypass the survivor if the survivor dies within the set period.
That said, it still needs checking. The right answer may depend on estate values, whether there is a home, who the ultimate beneficiaries are, whether anyone is financially dependent, and whether there are children from earlier relationships.
Different secondary beneficiaries: the overlooked issue
A common trap is where two people leave everything to each other first, but have different backup beneficiaries.
For example, a married couple may each leave everything to the survivor, but one wants their side of the estate to go to their own children from an earlier relationship if the survivor dies shortly after. The other may want their own side to go to different children, relatives or charities.
A survivorship clause may help keep each person’s estate on their intended side if the deaths happen close together.
But it may also create IHT consequences by stopping the first estate passing to the spouse or civil partner first.
In those cases, the answer is not a simple yes or no. It may be better to look at a more deliberate structure, such as a life interest trust, a Property Life Interest Trust, or clearer Will wording that deals with the couple’s actual family structure.
If property ownership is part of the planning, the Will also needs to be checked against whether the property is owned as beneficial joint tenants or tenants in common. For more on that, see Severance of Tenancy.
Unequal estate values: the key warning sign
Unequal wealth between spouses or civil partners is one of the clearest reasons to be cautious.
Suppose one spouse has an estate well above the nil-rate band and the other has a much smaller estate. If the wealthier spouse dies first and the Will contains a survivorship clause, their estate may pass directly to the children or other substitute beneficiaries if the survivor dies within the clause period.
That may lose the spouse exemption on the first death. It may also reduce the transferable allowances available on the second death.
Without the survivorship clause, the wealthier spouse’s estate may pass to the survivor IHT-free, with transferable allowances available later.
The numbers matter. A clause that looks tidy in a precedent can produce a worse tax result in a real estate.
For a broader explanation of the couple allowances, see Up to £1 Million Tax-Free: How Couples Use NRB and RNRB.
This is not the same as joint property survivorship
A survivorship clause in a Will is not the same as the survivorship rule for jointly owned property.
If a home is owned as beneficial joint tenants, the survivor normally receives the whole property automatically, outside the Will. The Will may not control the first person’s share at all.
If the home is owned as tenants in common, each person’s share can usually pass under their Will.
That ownership question should be checked separately. A well-drafted Will can still fail to achieve the intended result if the property ownership does not match the planning.
Common accident and unknown order of death
There is a technical rule called commorientes. In England and Wales, if two people die in circumstances where it cannot be shown who died first, the younger is treated as having survived the older for property succession purposes.
For inheritance tax, there are separate rules that can treat the deaths as simultaneous.This can create surprising results for married couples and civil partners. In some common-accident cases, not having a survivorship clause can preserve a better IHT outcome.This is rare, but it matters because survivorship clauses are often included precisely to deal with close-together deaths. If the clause is inserted without thought, it can override an outcome that would otherwise have helped the estate.
How long should the survivorship period be?
Most survivorship periods are short: commonly 28 days, 30 days, or one calendar month.
For IHT purposes, survivorship periods of up to six months are treated in a particular way. The temporary position during the waiting period is generally disregarded, and the gift is treated as having taken effect from death depending on whether the beneficiary survives the period.
Longer periods can create more complex tax and trust issues, so they should not be used casually.
For most family Wills, the real issue is not whether the period is 28 days or 30 days. The real issue is whether the clause should be there at all.
What Fern Wills & LPAs checks before deciding
Before deciding whether to include a survivorship clause, we usually check:
• Are you married, civil partners, unmarried partners, widowed, divorced or separated?
• Are both Wills leaving everything to each other first?
• Are the ultimate beneficiaries the same, or different?
• Are there children from earlier relationships?
• Are the estate values similar, or is one estate much larger?
• Is inheritance tax likely to be relevant?
• Is the home owned as beneficial joint tenants or tenants in common?
• Would a trust be more suitable than a simple survivorship clause?
• Are there cross-border, residence or tax issues that need specialist advice?
• What would you actually want to happen if one of you died and the other died a few days later?
A survivorship clause is a drafting tool, not a default setting.
Cases
“We are married and everything goes to the children anyway”
Anna and Mark are married. Their Wills leave everything to each other first, then to their two children equally.
If Anna dies first and Mark dies ten days later, a survivorship clause could make Anna’s estate bypass Mark and go straight to the children. That may look efficient, but it could waste the spouse exemption and affect transferable allowances.
If both Wills have the same ultimate beneficiaries, the clause may add very little benefit and may create tax risk. In this type of case, the safer starting point is usually to avoid a routine survivorship clause unless there is a clear reason to include one.
“We are married, but our backup beneficiaries are different”
David and Priya are married. David wants his estate to go to Priya first, but if Priya dies shortly after him, he wants his share to go to his daughter from an earlier relationship. Priya wants her estate to go to David first, but if David dies shortly after her, she wants her share to go to her own family.
Here, a survivorship clause may have a purpose. It can stop the first person’s estate being pulled into the survivor’s estate and then passing under the survivor’s different Will.
But that protection may come at a tax cost, especially if one estate is much larger than the other. It may also be too blunt. A trust or more tailored Will structure may fit better than a standard 30-day clause.
“One spouse has much more wealth than the other”
Harold and Wendy are married. Harold’s estate is worth £600,000 and Wendy’s estate is worth £300,000. Their Wills leave everything to each other first, then to their children.
If Harold dies first and Wendy dies five days later, a 30-day survivorship clause could mean Harold’s estate bypasses Wendy and goes straight to the children. Assuming the residence nil-rate band conditions are met, Harold may use his own nil-rate band and residence nil-rate band, but part of his estate may still be taxable.
Without the survivorship clause, Harold’s estate could pass to Wendy under the spouse exemption. Wendy’s estate may then have her own allowances and Harold’s transferable allowances available when her estate passes to the children.
This is why unequal estate values should always trigger a closer check.
“We are unmarried partners”
John and Jane are unmarried partners. Their Wills leave everything to each other first, then to their siblings. John’s estate is £350,000 and Jane’s is £200,000.If John dies first and Jane dies shortly afterwards, John’s estate may be taxed on the first death because Jane is not his spouse or civil partner. If John’s estate then forms part of Jane’s estate, some of the same value may be exposed again on Jane’s death.
A survivorship clause can help by making John’s estate bypass Jane if Jane dies within the set period. In many unmarried-partner cases, that is a sensible starting point.
But it still needs checking. If Jane was financially dependent on John, or if there are different family beneficiaries, the planning may need more than a simple clause.
“Our estates are modest and IHT is unlikely”
Sam and Rachel are married. Their combined estate is comfortably below the IHT thresholds, and their Wills leave everything to each other first, then to the same beneficiaries.
In that situation, the tax risk may be low. A survivorship clause might not cause an immediate IHT problem.
But that still does not make it automatic. If the same people inherit either way, the clause may be unnecessary. If different people inherit depending on who dies first, the clause may matter for family-control reasons rather than tax.
The decision still comes back to the same question: what result do they want if deaths happen close together?
“They die together and nobody knows who died first”
A married couple die in the same accident and the order of death cannot be proved. In England and Wales, the older person is treated as having died first for succession purposes, while IHT uses separate rules for simultaneous deaths.
Without a survivorship clause, this can sometimes preserve a better IHT outcome for married couples and civil partners.
With a survivorship clause, that outcome may be blocked because the survivor is treated as not having survived long enough to inherit.
This is a rare case, but it is one reason why “standard” survivorship clauses should not be used without thought.
“The clause applies to every beneficiary”
Some Wills use a broad survivorship condition for all beneficiaries. That can be useful in some cases, but it can also cause unexpected failures of gifts.
For example, a gift to an adult child, sibling, charity or friend may fail if they survive the person making the Will but die within the survivorship period. The gift then passes as though that beneficiary had died first.
That may be intended. It may not be.
A broad all-beneficiaries clause should be checked carefully, especially where individual gifts, charities, vulnerable beneficiaries, or family branches are involved.
Should married couples include survivorship clauses in their Wills?
Not automatically. If a married couple or civil partners leave everything to each other first, a survivorship clause can sometimes waste the spouse exemption or affect transferable allowances. It may still be useful where there are different backup beneficiaries or other planning reasons, but it should be diagnosed.
Should unmarried partners include survivorship clauses?
Often, yes. Unmarried partners do not have the spouse exemption or transferable nil-rate band between them, so a survivorship clause is often a sensible starting point. It should still be checked against the estate values, family structure and intended beneficiaries.
What survivorship period is normally used?
Many Wills use 28 days, 30 days or one calendar month. The period should not be chosen casually. For most clients, the bigger issue is whether the clause should be included at all.
Can a survivorship clause save inheritance tax?
It can in some unmarried-partner situations. It can also create or increase an IHT problem for married couples and civil partners. The tax answer depends on the couple’s legal status, estate values, beneficiaries and available allowances.
What if we have different children or different backup beneficiaries?
That is exactly the type of case where the clause needs careful thought. A survivorship clause may help keep each person’s estate on their intended side of the family if deaths happen close together, but a trust or more tailored Will structure may be better.
Is a survivorship clause the same as owning a property as joint tenants?
No. Joint property survivorship is about how the property is owned. A survivorship clause is wording in a Will. Both can affect where assets go, so they should be checked together.
Next steps
If you already have Wills and you are not sure whether the survivorship wording still fits, the simplest route is a Will and LPA MOT.
We check whether the documents still do the job, whether the wording creates avoidable risk, and whether a fresh Will or targeted update is needed.
This article is general information only, not individual advice.
If you’d like help applying this to your circumstances, we can guide you through the options.
