Life Interest Trust or Life Cover for the Children?

This is the classic second-marriage problem, and there is no painless answer — only a choice between two imperfect ones. You want your current spouse to have a home for the rest of her life, and you want your children from your first marriage to inherit in the end. The difficulty is that one house cannot do both jobs at the same time. Leave it to her outright and she can, in time, leave it to anyone she chooses, so your children may get nothing. Leave it to them and she could be forced out of her own home. A life interest trust and life insurance for the children are the two standard ways through this, and they pull in opposite directions.

A life interest trust keeps the house and shares it across time. Your spouse lives there for the rest of her life, and only when she dies does the capital pass to your children. Insuring your life for your children does the reverse: it creates a separate pot of money that reaches them at your death, so the house can pass to your spouse outright and nobody has to wait for anyone else to die to inherit.

Which one is right depends on cost, on control, on tax, and above all on how each arrangement feels to the people who have to live inside it for years — often the surviving spouse most of all. This page compares the two on all four.

What a life interest trust actually does

A life interest trust, sometimes called an interest in possession trust, splits ownership of the house into two parts that arrive at different times. Your spouse becomes the life tenant: she has the right to live in the property, or to receive the income from the trust's assets, for the rest of her life. Your children are the remaindermen: they inherit the capital — the house itself — but only when your spouse dies. In the meantime they own nothing they can touch.

The attraction is control that reaches beyond your own death. You decide who ultimately gets the house, and nothing your spouse does later can change it. She cannot sell it and give the proceeds to her own family, cannot leave it to a new partner, cannot be pressured into signing it away. The eventual gift to your children is locked in on the day you die. For a parent whose deepest fear is that the first family's home ends up with the second family's relatives, that certainty is the whole point.

Well-drafted trusts usually allow the house to be sold and a smaller one bought, so your spouse is not trapped in a property she can no longer manage, but the detail matters and it all depends on the wording. This is the arrangement people reach for when there is genuinely only one significant asset, the situation we describe in one house, two families, and no way to split it. It is also the structure at the centre of most planning for a second marriage with one house and children from the first.

What insuring your life for the children does instead

The other route leaves the house out of it. You leave the property to your spouse outright, so she owns it fully and can live, move, downsize or sell exactly as she wishes with no one looking over her shoulder. Separately, you take out life cover written in trust for your children, so that when you die they receive a sum of money of their own. The house looks after your spouse; the policy looks after your children; and the two are no longer fighting over the same asset.

The great advantage is that nobody waits for a death to inherit. Your children are provided for at your death, not at the far-off death of a stepmother who may be their own age or younger. There is no trust binding the two families together for decades, no shared interest in a single house to argue over, no sense on either side that one person's longer life is another person's loss. Each side gets what it needs, cleanly and separately.

A life policy is not the only pot that can do this job. A workplace death-in-service benefit can be pointed at children from a first marriage through a nomination, as we set out in the piece on children from a first marriage and the work payout, and a pension can be split between a second spouse and first-marriage children, covered in the guide to one pension pot shared between a second wife and the first marriage's children. Cover is simply the most flexible of these, because you set the sum and the trust yourself rather than relying on a scheme's rules.

Cost: setting up and keeping each one going

The two options carry very different kinds of cost, and they fall at different times. A life interest trust has an upfront cost to set up properly, because it needs careful drafting by a solicitor, and it has ongoing costs once it is running. Trustees have to administer it for as long as it lasts — potentially decades — which can mean valuations, trust tax returns, and professional fees if you appoint a professional trustee. A trust that runs for thirty years is a thirty-year commitment of administration, not a one-off piece of paper.

Life cover works the other way round. There is little to set up beyond arranging the policy and writing it in trust, but you pay a premium for as long as the cover runs. We do not quote what cover costs on this site, because the figure depends entirely on your age, health and the sum you want, and only an FCA-authorised broker looking at your circumstances can price it. What matters for the comparison is the shape of the cost: a trust front-loads legal work and then bills quietly for years; cover asks for a regular premium instead. Neither is free, and the cheaper option on paper is not always the one that causes least trouble.

Control: what each protects, and what can go wrong

The trust wins on certainty and loses on flexibility. It guarantees where the house ends up, but it commits your spouse and your children to a relationship as life tenant and remaindermen whether they like each other or not. Disputes are common: who pays for a new roof, whether the house can be let out, whether your spouse can move nearer her grandchildren, how the property is maintained when the people who will inherit it have no use of it yet. The trustees sit in the middle of all of it, and if you choose them badly the arrangement can curdle.

Cover wins on cleanliness and loses on precision. The sum is fixed at the outset, so it may not keep pace with the value of the house or with what the children might otherwise have inherited, and topping it up means arranging more cover. And there is a hard requirement that undoes people: the policy must actually be in force when you die. A term policy that expires before you do pays nothing, leaving the children with neither the house nor the money — which is precisely why cover arranged for a lifelong purpose like this is normally whole-of-life, built so it cannot lapse on a birthday. If you want to see what a policy sized against your own situation would involve, you can get life insurance quotes and have a broker set the sum and structure around your family. Where the surviving spouse has been contributing to the home without being on the title, the picture is more tangled again, and worth reading alongside paying half the mortgage but not being on the deeds.

Tax: how each is treated

Where a life interest trust takes effect on your death for a surviving spouse, it is normally what the rules call an immediate post-death interest. That has a specific consequence: the spouse exemption applies when you die, so no inheritance tax falls on the share passing into the trust at that point, and the trust assets are instead treated as part of your spouse's own estate when she later dies, and taxed then with her allowances. In plain terms the tax is deferred rather than avoided, and the eventual bill lands on the second death.

Life cover written in trust is treated differently. Because the policy is held in trust for your children, the payout normally falls outside your estate altogether, is not counted for inheritance tax on your death, and reaches your children without waiting for probate. Meanwhile, leaving the house to your spouse outright uses the spouse exemption in the ordinary way. The result can be a cleaner tax position, though the right answer depends on the size of the estate and the rest of your assets, and this is a point to check with a solicitor rather than assume. Trustees of a life interest trust also carry administration and reporting duties for the whole time it runs, which the cover route avoids.

How each one feels to live inside

This is the part the paperwork never captures, and it is usually what decides the matter. A life interest trust can leave your spouse feeling like a tenant in her own home, her security dependent on a trust, her stepchildren holding a stake in the roof over her head and, however unfairly, an interest in how long she lives. It can leave your children feeling they are waiting on a death, watching a house they think of as their inheritance being lived in by someone who is not their parent. Both feelings are corrosive, and no clause drafts them away.

Cover changes the emotional arithmetic. Your spouse owns her home and owes no one an explanation. Your children have their provision in hand and are not counting anyone's years. The two families are not bound to each other by a single asset, which for many blended families is worth more than the tax efficiency of any structure. Against that, some people genuinely want the house itself to stay in the bloodline, and no amount of money is the same thing as the family home — in which case the trust, for all its friction, is the honest answer.

Scotland and Northern Ireland. The same choice exists across the UK, but the machinery differs. In Scotland a life interest is created as a liferent, and Scots law also gives children automatic legal rights to a share of the moveable estate that a will cannot simply override, which changes what a trust can and cannot protect. Northern Ireland has its own succession law again. Life cover written in trust works throughout the UK and sidesteps much of this, which is one more reason families in blended situations lean towards it — though the trust drafting, wherever you are, is a job for a solicitor who knows the local rules. The wider set of blended-family questions is gathered in our guide to dependants and unusual family shapes.

Frequently asked questions

What does a life interest trust do?

It gives your surviving spouse the right to live in the property, or to receive income from the trust's assets, for life, with the capital then passing to the people you chose, usually your children. It protects the eventual gift so your spouse cannot redirect it, but the children may wait years or decades before they inherit anything.

How is a life interest trust taxed?

Where it takes effect on death for a surviving spouse it is normally an immediate post-death interest, so the spouse exemption applies when you die and the assets are treated as part of her estate when she later dies. The tax is deferred to the second death rather than avoided, and trustees carry administration and reporting duties for as long as it runs.

When is life cover the better answer?

When the children need money rather than a house, when you would rather not tie your spouse's home into a trust she has to live inside, or when the estate is a single property. Cover written in trust pays the children at your death, the house passes to your spouse outright, and nobody waits for anyone else to die.