You can't control whether your children's marriages last. You can, however, control how the inheritance you leave them is structured - and a thoughtful will can make a meaningful difference if a child later separates or divorces.
This isn't about distrust of a child's partner. It's about acknowledging that around two in five UK marriages end in divorce, and that money you spent a lifetime building doesn't have to be split between strangers if a relationship breaks down years after you're gone.
This guide explains the practical structures parents use to keep an inheritance with the bloodline, why outright gifts are vulnerable, and how to balance protection with not being heavy-handed.
Is an inheritance "matrimonial property"?
In England and Wales, divorce courts use a wide discretion under the Matrimonial Causes Act 1973. Assets are broadly classified as:
- Matrimonial property - things built up during the marriage. Default starting point: shared roughly equally.
- Non-matrimonial property - things one spouse brought into the marriage or inherited from elsewhere. Sometimes ringfenced, sometimes not.
An inheritance starts life as non-matrimonial. So far so good. But three things commonly drag it back into the matrimonial pot:
- Mingling. Inherited cash deposited into a joint account, or used to pay down a joint mortgage, is treated as merged with matrimonial assets.
- Need. If divorcing the spouse from the inheritance would leave them or the children without enough to live on, the court will reach for it regardless.
- Long marriages. The longer a marriage lasted and the more it relied on the inherited asset, the more the court treats it as shared.
So a parent who simply leaves £200,000 to a child outright provides little real protection if that child's marriage breaks down ten years later and the money's been folded into the family finances.
The structures that work
There's a small toolkit of well-established trust and gift structures that protect inherited assets more effectively than an outright gift. None of them is right for every family.
Discretionary trust
You leave the inheritance into a discretionary trust in your will. Trustees - chosen by you - hold the money for a class of beneficiaries (typically your child, their children, and possibly other descendants).
The child does not own the inheritance. They are a discretionary beneficiary, with no fixed entitlement. On divorce, the court may take the trust into account as a "financial resource" - but it can't simply order the trust to pay out, and the trustees are not obliged to.
A letter of wishes guides the trustees' discretion: pay out for housing, education, life events, but withhold during instability.
(If this is starting to feel relevant, the Trusted Hands will builder flags trust scenarios and walks you through the options.)
Life-interest trust
The child receives the income from a fund (e.g. interest from invested cash, or rent from a property) for life, but never the underlying capital. On the child's death, the capital passes to the next generation - usually grandchildren.
Useful where you want the child to benefit during their lifetime but be sure the capital reaches grandchildren intact.
Bloodline trust / dynasty trust
A general label for trusts designed to keep capital within the bloodline. They're typically discretionary trusts with carefully drawn beneficiary classes that exclude in-laws.
Outright gift with a "stable family" trigger
A simpler hybrid: leave the inheritance outright, but with a clause that converts it into a trust if the child is going through divorce proceedings on the date of your death. Cleaner administration in the common case where there's no problem; protection where there is.
These structures need a specialist drafter and they each carry trade-offs - tax treatment, ongoing administration, the child's relationship to the trustees. For complex estates, we recommend you seek assistance from a Trusted Hands Advisor or your own legal advice.
The trade-off: protection versus simplicity
A bloodline-protective trust costs more to set up and run. It requires trustees who'll act conscientiously for decades. The child knows the inheritance is in trust, which can colour the relationship.
For a modest inheritance - say a five-figure sum - the protection is rarely worth the complication. The structures above are typically used for estates from £200,000 upwards, where the protection meaningfully outweighs the friction.
If you'd rather just keep things straightforward and accept the risk, our will mistakes guide covers the simpler protections most wills should include anyway.
Things parents often want but can't reliably do
A few common requests that don't translate cleanly into UK law:
- "Only my children can inherit, never their spouses." You can write a discretionary trust that excludes spouses by class, but you can't override a divorce court's discretion entirely if it sees inherited money as a matrimonial resource.
- "My ex-daughter-in-law gets nothing." A divorce settlement is between your child and their spouse; you don't have a seat at that table. What you can control is what the inheritance looks like in your child's hands.
- "The grandchildren inherit, never my child." You can do this - skip a generation - but it can have inheritance tax consequences, and you'll want to think about whether your child needs the support during their lifetime.
The honest answer is that no structure is bulletproof. A determined court with strong "needs" arguments can reach into a trust. But a thoughtful structure shifts the odds significantly.
> Want to think this through with a guide? Trusted Hands turns these decisions into a 15-30 minute walkthrough. Start free → - only pay when you download.
Pre-nuptial and post-nuptial agreements
Independent of your will, your child can put a pre-nuptial or post-nuptial agreement in place with their spouse. These aren't automatically binding in England and Wales (yet), but they're given significant weight by the courts as long as they were entered freely and with proper disclosure.
A nuptial agreement that explicitly ringfences inherited assets is one of the most effective complements to a protective trust in a will. Encourage your adult children to consider one if they're entering a marriage with significant pre-existing or expected inherited assets.
What about inheritance tax?
Trusts come with their own IHT rules. Discretionary trusts can attract periodic charges every ten years and exit charges when capital leaves the trust. The numbers are usually modest compared to the values being protected, but they're real.
The nil-rate band of £325,000 and residence nil-rate band of £175,000 (frozen until April 2030) interact with trusts in particular ways - for instance, leaving the family home into a discretionary trust can lose you the residence nil-rate band, which is normally available where the home passes to direct descendants.
This is the area where professional drafting genuinely earns its fee. Our inheritance tax guide covers the basics; a private-client solicitor can model the trade-offs for your specific estate.
> Ready to start your will? Trusted Hands turns these decisions into a 15-30 minute guided builder. Start free → — only pay when you download.
Frequently asked questions
If my child divorces, can their ex really get a share of my inheritance?
Possibly, depending on what the inheritance was used for and how long the marriage lasted. If the inheritance was kept separate (separate account, no mingling, not used for a joint home), the chances of it being ringfenced go up substantially. If it was folded into shared finances, the chances drop.
Are trusts only for very rich families?
No - but they make sense for estates where the cost of setup and admin is small compared to the value being protected. For a five-figure inheritance, an outright gift is usually fine. For a six-figure inheritance, a trust is often worth the trouble.
Can I make the inheritance contingent on my child not being divorced at the time?
Yes - a "contingent gift" structure can do this. It can also be drafted so the inheritance flips into a trust if a divorce is in progress. Specialist drafting required.
What if I don't trust my child's spouse but I trust my child?
You can leave it outright and trust your child to manage it. A letter of wishes (non-binding) can record your views. Many parents take this route - the trust structures aren't right for everyone.
Can a divorce court force a trust to pay out?
Not directly - but the court can treat the trust as a financial resource available to your child and adjust the rest of the divorce settlement accordingly. A well-drafted discretionary trust limits this; it doesn't eliminate it.
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