When people compare wills vs trusts in the UK, they often assume the two are alternatives — that you choose one or the other. In reality they are different tools that do different jobs, and many estate plans use both. A will decides what happens when you die; a trust is a way of holding assets that can operate during your lifetime, after your death, or both. Understanding the distinction helps you avoid paying for a trust you do not need, or missing one that would genuinely protect your family.
What a will does
A will is a legal document that only takes effect on death. It sets out who inherits your estate, appoints the executors who administer it, and — if you have children under 18 — names their guardians. It is the foundation of almost every estate plan, and for most households a clear, professionally drafted will is all that is required. If you are still deciding whether you need anything more, our overview of what estate planning involves is a good starting point.
The trade-off with a will is that it does nothing while you are alive, and the estate it governs normally has to go through probate — the legal process of proving the will and gathering in assets — before anything can be distributed. That process is routine but can take several months.
What a trust does
A trust is a legal arrangement where one group of people (the trustees) look after assets for the benefit of others (the beneficiaries), according to rules you set. Because the trustees hold the legal title, a trust lets you separate control of an asset from benefit of it. That is the feature that makes trusts useful in particular situations: you can provide for someone without handing them a lump sum outright.
Common types of trust used in UK estate planning include:
- Bare trusts — the simplest form, often used to hold money for a child until they turn 18.
- Discretionary trusts — the trustees decide how and when to pay out among a class of beneficiaries, which is flexible and useful for vulnerable or unpredictable circumstances.
- Interest in possession trusts — one person has the right to income or to live in a property (for example, a surviving spouse), while the capital is preserved for others.
Wills vs trusts: the key differences
The practical contrasts are straightforward. A will takes effect only on death; a trust can operate at any time. A will is a public document once probate is granted; a trust is generally private. A will normally requires probate; assets correctly held in a lifetime trust may not. And a will is relatively cheap and simple, whereas a trust carries set-up costs, ongoing administration, its own tax rules and, often, the need for professional trustees.
A will says who gets what. A trust controls how and when they get it — and who stays in charge along the way.
When is a trust actually worth it?
There are clear cases where a trust earns its keep:
- Protecting children from a previous relationship. A will trust can let your new partner live in the family home for life while guaranteeing the property eventually passes to your own children.
- Providing for a vulnerable or disabled beneficiary without affecting their entitlement to means-tested benefits.
- Managing money for young beneficiaries so they inherit gradually rather than receiving a large sum at 18.
- Certain tax planning, though this needs care — see our guide to inheritance tax, because many trusts have their own charges and do not remove a bill by themselves.
Equally, there are cases where a trust is oversold. Be cautious of anyone marketing a trust as a guaranteed way to avoid care-home fees or sidestep inheritance tax, particularly if it is sold at a seminar or through cold contact. Deliberately depriving yourself of assets to avoid care costs can be challenged by a local authority, and aggressive trust schemes can cause more tax than they save.
The usual answer: both, working together
For the majority of people, the right structure is a will on its own. For a meaningful minority — blended families, business owners, those with vulnerable dependants or larger estates — the right structure is a will and one or more trusts designed to work alongside it. Because the choice depends entirely on your circumstances, it is worth taking proper advice rather than buying a product off the shelf. Our checklist on how to choose a will writer explains how to find someone qualified to advise on whether a trust is right for you — and honest enough to tell you when it is not.