Wills vs Trusts: A Complete Guide for UK Families

Planning your estate is one of the most important things you can do for your family. Yet many people in the UK confuse wills and trusts, or assume they only need one. Both play a different role in protecting your assets, your children, and your long term wishes. 

This guide breaks down how each works, who they suit, and the key legal and tax differences between them. You’ll also learn when it makes sense to combine both, so your family avoids unnecessary probate delays, inheritance tax surprises, and disputes after you’re gone.

What Is a Will and How Does It Work?

A will is a legal document that states how you want your estate distributed after death. It names beneficiaries, appoints executors, and can include guardianship wishes for children under 18.

In England and Wales, a will only takes effect after death and must go through probate before assets are released. Without a valid will, your estate falls under the intestacy rules set out in the Administration of Estates Act 1925, meaning the government decides who inherits, not you. This is different from Scotland, where succession law follows its own rules on forced heirship for spouses and children.

Key features of a will:

• Takes effect only after death
• Can be updated or revoked at any time while you’re alive, including through a codicil (a formal amendment) or by writing a new will
• Must be signed and witnessed by two people to be valid, and the person making it must have testamentary capacity
• Covers property, savings, investments, pensions outside of trust, and personal belongings
• Can appoint guardians for minor children

According to the Law Society, around 60% of UK adults do not have a valid will in place, leaving families exposed to disputes and unnecessary delays. Solicitors regulated by the Solicitors Regulation Authority (SRA) can draft a will, and registering it with the National Will Register (Certainty Will Search) makes it easier for executors to locate after death.

What Is a Trust and How Does It Work?

A trust is a legal arrangement where you (the settlor) transfer assets to a trustee, who manages them for the benefit of chosen beneficiaries. Unlike a will, a trust can take effect immediately, during your lifetime, or after death. This flexibility makes trusts a powerful tool for families who want more than a simple inheritance plan.

Trusts separate legal ownership from beneficial ownership. The trustee holds and controls the asset, but the beneficiary receives the benefit, such as income or eventual access to the capital. This separation is what allows trusts to offer protection that a will cannot, since the trustee manages the asset according to your instructions, even after you’re gone.

Common reasons UK families set up trusts:

• Protecting assets for children until they reach a set age
• Supporting a vulnerable or disabled family member
• Reducing exposure to inheritance tax
• Avoiding probate delays for certain assets
• Keeping wealth within the family bloodline (useful in second marriages)

Trusts require more setup and ongoing administration than a will, including registration with HMRC’s Trust Registration Service (TRS) in most cases, but for families with specific protection needs, the added structure often proves worthwhile.

Wills vs Trusts: Key Differences UK Families Should Know

The core difference is timing and control. A will only activates after death and goes through probate, a public and sometimes lengthy process. A trust can operate during your lifetime and bypass probate for the assets it holds.

Most estate planning solicitors recommend combining both, a will for overall distribution and a trust for specific protection needs.

Types of Trusts Available in the UK

UK trust law offers several structures, each suited to different family situations. Choosing the right type depends on your goals, tax position, and who you want to protect.

• Bare trust: Assets are held for a named beneficiary who gains full control at 18 (16 in Scotland). Common for grandparents saving for grandchildren.
• Discretionary trust: Trustees decide how and when beneficiaries receive income or capital. Offers flexibility and asset protection.
• Interest in possession trust: A beneficiary receives income from the trust immediately, while capital passes to others later.
• Life interest trust: Often used in wills to give a surviving spouse the right to live in a property, with children inheriting later.
• Disabled person’s trust: Provides tax advantages when supporting a beneficiary who receives means tested benefits.

Each type carries different inheritance tax and income tax rules, so professional advice from a STEP qualified solicitor is essential before setting one up.

When Should You Choose a Will Over a Trust?

For most UK families, a will is the starting point. It is simpler, cheaper, and covers the majority of estate planning needs without ongoing management. Unless your situation involves complex assets or family dynamics, a well drafted will is often all you need.

A will suits you if:

• Your estate is straightforward with no complex family dynamics

• You want full control over assets until death

• You do not need lifetime asset protection

• Your main goal is naming beneficiaries and guardians

• You want a lower cost, lower maintenance solution

• You prefer a document that’s easy to update as circumstances change

A basic will through a solicitor typically costs between £150 and £300, while mirror wills for couples often cost £250 to £400 combined. This makes wills far more affordable than setting up and maintaining a trust, especially for families without significant property or investment portfolios.

If your estate planning needs stay simple, a will alone, ideally paired with a Lasting Power of Attorney (LPA) to cover decisions if you lose mental capacity, can give your family the clarity and legal protection they need.

When Does a Trust Make More Sense Than a Will?

Trusts become valuable when your situation involves more than straightforward inheritance. They offer control that a will simply cannot provide once probate begins.

Consider a trust if you:

• Want to protect a child’s inheritance until they’re older or more responsible
• Have a blended family and want to protect children from a previous relationship
• Need to provide for a vulnerable or disabled relative without affecting their benefits
• Want to reduce your estate’s inheritance tax exposure
• Wish to avoid probate delays on specific assets like property

Setting up a trust usually costs between £500 and £2,000, depending on complexity, plus ongoing trustee, accountancy, and Trust Registration Service compliance fees.

Inheritance Tax: How Wills and Trusts Are Treated Differently

Inheritance tax (IHT) is charged at 40% on estates above the £325,000 nil rate band, rising to £500,000 with the residence nil rate band if you leave your home to direct descendants. These thresholds are set out under the Inheritance Tax Act 1984 and reviewed periodically by HM Treasury.

Assets left through a will are counted in full within your taxable estate. Trusts, however, can reduce this liability depending on the type used and how long ago assets were transferred.

Key IHT points for trusts:

Assets placed in a trust may fall outside your estate after 7 years (the “gift” rule)

Discretionary trusts may face a periodic charge of up to 6% every 10 years

Some trusts, like those for disabled beneficiaries, receive favourable tax treatment

Trusts do not automatically avoid IHT. Poor planning can trigger immediate charges

Because IHT rules change frequently, always check current HMRC guidance or speak with a qualified tax adviser before transferring assets into a trust.

Probate Process: Wills vs Trusts Explained

Probate is the legal process of confirming a will and authorising the executor to distribute the estate. It typically takes 6 to 12 months in the UK, sometimes longer for complex or contested estates.

Assets held in a trust generally bypass probate entirely, since the trustee already holds legal title and can act without court approval. This is one of the main reasons families use trusts alongside a will, particularly for property or business assets that need quick access.

Probate involves the following stages:

Where there is no valid will, the court instead issues a Grant of Letters of Administration under the intestacy rules. Trust assets skip these steps, which can save families months during an already difficult time.

Can You Have Both a Will and a Trust?

Yes, and for many UK families, this combination offers the best protection. A will handles the overall distribution of your estate, while a trust manages specific assets that need extra protection or control. Using both together closes the gaps that either document leaves on its own.

A common structure looks like this:

1. A will names guardians, executors, and distributes remaining assets
2. A trust holds the family home to provide for a surviving spouse
3. A separate trust protects an inheritance for young children until adulthood
4. A discretionary trust supports a vulnerable relative without affecting their benefits

Solicitors often describe this as “belt and braces” planning, which will provide the overall roadmap, while trusts handle sensitive or high value assets that need ongoing management. This layered approach reduces the risk of disputes and gives trustees clear authority over specific assets.

For blended families, second marriages, or estates with property and young beneficiaries, pairing a will with one or more trusts often provides stronger, longer lasting protection than relying on a single document.

Common Mistakes UK Families Make With Wills and Trusts

Estate planning mistakes are common, and many stem from delaying decisions or relying on DIY templates without proper legal advice. These errors can cost families thousands and cause lasting disputes.

Frequent mistakes include:

• Not updating a will after divorce, remarriage, or the birth of a child
• Using outdated online will templates that don’t meet legal requirements
• Failing to appoint a backup executor or trustee
• Assuming a trust automatically avoids inheritance tax
• Not reviewing trusts regularly as tax rules and family circumstances change
• Leaving jointly owned property out of estate planning discussions
• Overlooking a Lasting Power of Attorney, which the Court of Protection can only address through a lengthy application if it’s missing

A will becomes invalid in England and Wales if you remarry after writing it, unless the will specifically states it was made in contemplation of that marriage. This single rule catches out thousands of people every year.

How to Set Up a Will or Trust in the UK

Setting up either document properly requires attention to legal detail. Errors in wording or witnessing can make them invalid.

Steps to get started:

1. List your assets, property, savings, pensions, investments, and personal items
2. Decide who should benefit and in what proportions
3. Choose executors (for a will) or trustees (for a trust) you trust completely
4. Consult a solicitor specialising in wills, trusts, and probate
5. Sign the will with two independent witnesses present
6. Register any trust with HMRC’s Trust Registration Service where required
7. Review and update every 3 to 5 years or after major life events

Working with a STEP qualified solicitor (Society of Trust and Estate Practitioners) ensures your documents meet current UK legal and tax standards.

Key Terms Glossary

Final Thoughts

Wills and trusts serve different purposes, but together they form a complete estate plan. A will gives you control over who inherits what, while a trust adds protection, privacy, and flexibility for more complex family situations. 

Neither document is a one size fits all solution, and the right combination depends on your assets, family structure, and long term goals. Speaking with a qualified solicitor or STEP accredited adviser is the safest way to make sure your estate plan reflects UK law and actually protects the people you care about.

FAQs

What Is The Main Difference Between A Will And A Trust? 

A will takes effect after death and goes through probate. A trust can take effect immediately and usually bypasses probate for the assets it holds.

Do I Need Both A Will And A Trust In The UK? 

Not always. Many families only need a will. Trusts become useful for asset protection, blended families, or reducing inheritance tax exposure.

Can A Trust Help Avoid Inheritance Tax? 

Some trusts reduce inheritance tax liability, especially after 7 years from the transfer date. However, trusts don’t automatically avoid IHT and require careful planning.

How Much Does It Cost To Set Up A Will In The UK? 

A basic will typically costs £150 to £300 through a solicitor. Mirror wills for couples usually cost £250 to £400 combined.

How Long Does Probate Take In The UK? 

Probate typically takes 6 to 12 months, though complex or contested estates can take longer.

What Happens If I Die Without A Will In The Uk? 

Your estate is distributed under intestacy rules, which follow a fixed legal order of relatives, not necessarily your actual wishes.

Does Marriage Cancel A Will In England And Wales? 

Yes. Marriage automatically revokes an existing will unless it was made in clear contemplation of that specific marriage.

What Is A Discretionary Trust Used For? 

A discretionary trust gives trustees control over when and how beneficiaries receive income or capital, offering flexibility and asset protection.

Can Trusts Protect Assets From Divorce Or Creditors? 

Yes, in many cases. Because trust assets are legally held by the trustee rather than the beneficiary, they can offer a layer of protection.

Who Should I Speak To About Setting Up A Will Or Trust? 

A solicitor specialising in wills and probate, ideally one accredited by STEP (Society of Trust and Estate Practitioners), can ensure your plan meets UK legal and tax requirements.