How to Write a Will in the UK — Complete 2026 Guide

Writing a will is the single most important thing you can do for the people you love. It decides who inherits your estate, who cares for your children, and who handles your affairs when you're gone. Without one, the state decides — and its rules rarely match what you'd have chosen. This guide covers everything you need to know to write a legally valid will in the UK.

Around 60% of UK adults have no will. That's not laziness — it's usually avoidance. Writing a will means confronting mortality, and that's uncomfortable. But the discomfort is brief. The consequences of dying without one can last years and cost your family a great deal of money, stress, and conflict. This guide is designed to make the process straightforward.

What Makes a Will Legally Valid in the UK?

The legal requirements for a valid will differ slightly across the UK's three legal systems. Getting these right is non-negotiable — a will that fails to meet them has no legal effect.

England & Wales (Wills Act 1837)

For a will to be valid in England and Wales, all of the following must be true:

• Age: The testator (the person making the will) must be 18 or over. Exception: members of the armed forces on active service may make a will at any age.
• Mental capacity (testamentary capacity): You must understand what a will is and what it does; know the nature and approximate value of your estate; know who might reasonably expect to inherit; and not be suffering from a disorder of the mind that distorts your wishes.
• Writing: The will must be in writing — printed, typed, or handwritten.
• Signature: The will must be signed by the testator, or by someone else in the testator's presence and at their direction, at the end of the document.
• Witnesses: The signature must be made or acknowledged in the simultaneous presence of two witnesses. Both witnesses must then sign the will in the testator's presence. Witnesses must be 18 or over and must not be beneficiaries (or spouses/civil partners of beneficiaries) — if they are, their gift fails but the will remains valid.

Scotland (Requirements of Writing (Scotland) Act 1995)

Scottish wills are governed by different legislation. The requirements are:

• Age: 16 or over (lower than England and Wales).
• Mental capacity: Same standard — sound mind, understanding the nature of the document and the estate.
• Subscription: The will must be subscribed — signed by the testator at the end of each page (or at least the last page, depending on whether the document is self-proving).
• Witnesses (for self-proving status): One witness signs and adds their name and address. A self-proving (formally valid) will is harder to challenge. An unwitnessed will can still be valid in Scotland but is easier to contest.

Scotland also retains the concept of legal rights (legitim): children have an automatic right to a share of the moveable estate regardless of the will's terms. This cannot be overridden. See our Scottish Wills Guide for the full picture.

Northern Ireland

Northern Ireland follows rules very similar to England and Wales under the Wills and Administration Proceedings (Northern Ireland) Act 1955 — the same requirements apply: 18 or over, mental capacity, writing, signed at the end, two witnesses present simultaneously who also sign.

When Do You Need to Write a Will?

The honest answer: now. But certain life events make it especially urgent.

• Marriage or civil partnership: In England, Wales, and Northern Ireland, marriage automatically revokes an existing will. If you marry without writing a new one, you die intestate. This catches many people out.
• Having children: A will is the only legal way to appoint a guardian for minor children. Without one, a court decides who raises them.
• Buying property: Property is usually the largest asset in an estate. Without a will, it passes under intestacy rules — which may not reflect your wishes, especially for unmarried couples.
• Cohabiting (unmarried couples): The intestacy rules give unmarried partners nothing, regardless of how long you've lived together. Only a will can protect a cohabiting partner.
• Divorce: In England and Wales, divorce revokes gifts to a former spouse and their appointment as executor — but does not revoke the rest of the will. It's worth rewriting rather than relying on partial revocation.
• Significant inheritance or change in assets: A change in what you own often means a change in how you'd want it distributed.
• Death of a beneficiary or executor: If someone named in your will predeceases you, their gift may lapse. Update the will to name a replacement.

Step-by-Step: How to Write Your Will

Here is the complete process from start to a legally valid, signed will.

1. Gather information about your estate
   List everything you own: property (including mortgages), bank accounts, investments, pensions, life insurance, vehicles, jewellery, artwork, digital assets, and business interests. Also list significant debts. This gives you a clear picture of what there is to distribute.
2. Decide who inherits what (your beneficiaries)
   Beneficiaries can be individuals (family members, friends) or organisations (charities). Be specific — use full legal names and, for organisations, registered names and charity numbers. Decide what each person or organisation receives: specific items, fixed cash sums, or a percentage of the residuary estate (what's left after specific gifts).
3. Choose your executor(s)
   Your executor is the person responsible for administering your estate — collecting assets, paying debts and taxes, and distributing what remains. Choose someone trustworthy, organised, and ideally younger than you. You can appoint up to four executors; most people appoint one or two. A professional executor (solicitor or bank) is an option if you have a complex estate or no suitable person.
4. Appoint guardians for minor children (if applicable)
   If you have children under 18, name a guardian who will care for them if both parents die. Discuss this with the proposed guardian first — it should not be a surprise. Consider a backup guardian in case your first choice cannot act.
5. Draft the document
   The will must clearly state: that it is your last will and testament; that you revoke all previous wills; your appointment of executors; your specific gifts; the residuary clause (who gets everything else); any trusts for minor children; funeral wishes (optional but useful).
6. Review carefully before signing
   Read the whole document. Check that names are spelled correctly, that addresses are accurate, and that the document reflects exactly what you intend. An error in a will can cause the gift to fail or — in serious cases — part of the will to be invalid.
7. Sign in front of two witnesses
   Both witnesses must be physically present at the same time when you sign. They must then sign immediately after, in your presence. Neither witness (nor their spouse or civil partner) should be a beneficiary. Witnesses must be 18 or over. Do not pre-sign and then get witnesses to countersign later — this invalidates the will.
8. Store it safely and tell your executor where it is
   A will that cannot be found is as good as no will. Store the original in a fireproof location, with a solicitor, or registered with a will storage service. Tell your executor where it is. Some people register their will with the National Will Register (Certainty) for a small fee — useful if you want it easily traceable.

What to Include in Your Will

Executors

Name at least one executor and ideally a substitute in case your first choice dies before you or is unable to act. If you die without appointing an executor, the court appoints an administrator — which delays the administration of your estate and adds cost.

Guardians for children

If you have children under 18, name a guardian. This is one of the most important decisions in any parent's will. Without it, the court decides — and may not choose the person you'd have wanted.

Specific gifts

These are named items or fixed amounts going to specific people: "I give my piano to my daughter Emma Jones of [address]" or "I give £10,000 to my friend Ahmed Hassan of [address]." Be precise. Vague descriptions ("my old car") can cause disputes if you own more than one vehicle.

Residuary estate

The residuary estate is everything left after specific gifts, debts, taxes, and funeral expenses have been paid. The residuary clause is usually the most important clause — it catches everything not specifically gifted. Without one, any assets not specifically mentioned pass under intestacy rules, which may not match your intentions.

Trusts for minor beneficiaries

Children under 18 cannot directly inherit. If you leave money to a minor, include a trust clause specifying who holds the money (trustees) and at what age the child receives it. A common approach is to hold assets on trust until the beneficiary reaches 18 or 21.

Funeral wishes

A will can record your funeral preferences (burial or cremation, specific requests), but it is not the ideal place for detailed instructions — wills are often not read until after the funeral. Consider a separate letter of wishes alongside the will, or a pre-paid funeral plan.

Letter of wishes

A letter of wishes is a non-binding document that sits alongside the will. It can cover things a will cannot easily address: who you'd like to receive specific personal items, guidance for trustees making discretionary decisions, or explanations for unusual provisions. It is not legally enforceable but provides important context for your executors.

Jurisdiction Differences: England & Wales vs Scotland vs Northern Ireland

Feature	England & Wales	Scotland	Northern Ireland
Minimum age	18	16	18
Witnesses required	2 (present simultaneously)	1 (for self-proving status)	2 (present simultaneously)
Marriage revokes will?	Yes — automatically	No	Yes — automatically
Children's forced share	No (but 1975 Act claims possible)	Yes — legitim right	No
Handwritten (unwitnessed) will valid?	No	No (post-1995)	No
Grant of probate required?	Usually yes (above £5k threshold)	Confirmation (equivalent)	Grant of probate
Governing legislation	Wills Act 1837	Requirements of Writing (Scotland) Act 1995	Wills and Administration Proceedings (NI) Act 1955

If you have assets in more than one jurisdiction — for example, a property in Scotland and bank accounts in England — take advice on which jurisdiction's will governs which assets. Generally, immovable property (land and buildings) is governed by the law of the country where it sits; moveable assets (cash, investments) by the law of the testator's domicile.

DIY vs Solicitor vs Online Will-Writing Service

There are three main routes to writing a will. The right choice depends on the complexity of your estate and how much support you want.

Route	Cost	Error risk	Best for
DIY (blank template)	Free–£30	High	Very simple estates, legally confident
Online will-writing service (e.g. ClearWill)	£49–£150	Low	Most people — straightforward to moderately complex
High-street solicitor	£200–£500+	Low	Complex estates, business interests, trusts
Specialist private client solicitor	£500–£2,000+	Very low	Large/complex estates, IHT planning, overseas assets

Do you need a solicitor to write a will?

No — there is no legal requirement to use a solicitor. A will written by you (or drafted with an online service) is just as legally valid as one drafted by a solicitor, provided the execution requirements are met.

A solicitor is worth the cost if: your estate is large and IHT planning is needed; you have business interests that require specialist structuring; you have assets in multiple countries; you want to create a complex trust; or the family situation is contentious enough that a professionally drafted document is important for robustness.

For most people with a standard estate — house, savings, pension, and straightforward family — an online will-writing service delivers the same result for a fraction of the cost. ClearWill's AI-assisted drafting covers all three UK jurisdictions, produces jurisdiction-correct documents, and takes around 20–30 minutes to complete.

Common Mistakes That Invalidate Wills

A surprising number of wills are either invalid or successfully challenged. These are the most common causes.

1. Witness is a beneficiary (or their spouse is)

If a witness is a beneficiary, or is married to or in a civil partnership with a beneficiary, that gift fails — the beneficiary receives nothing under that clause. The will itself remains valid, but the affected gift is forfeited. Use independent witnesses: neighbours, colleagues, friends — anyone who is not inheriting under the will.

2. Witnesses not present simultaneously

Both witnesses must be physically present at the same time when the testator signs. Getting one witness to sign on Monday and another on Tuesday invalidates the will. This is one of the most common execution errors.

3. Mental capacity at the time of signing

A will can be challenged if the testator lacked testamentary capacity at the time of signing. This doesn't require a formal diagnosis — it requires proving that, at the moment of signing, the person did not understand what they were doing. If there is any doubt about capacity, a doctor's assessment at the time of signing is worth having.

4. Undue influence

If someone pressured or coerced the testator into writing or changing the will, it can be challenged on the grounds of undue influence. This most often arises where a carer or family member has isolated the testator. Courts take a narrow view of what counts as undue influence — gentle persuasion is not enough — but it is a genuine basis for challenge.

5. Marriage revoked the will and it was never updated

In England, Wales, and Northern Ireland, marriage automatically revokes any existing will. Many people marry without realising their existing will is now void. If you marry (or remarry), write a new will immediately.

6. Not signing at the end

The signature must appear at the end of the document. If you add clauses after your signature, those additions have no effect — and in some cases, everything after the last valid signature may be ignored. Always sign after the final clause of the will.

7. Alterations made after signing

Any alteration to a will after it has been executed (signed and witnessed) is invalid unless the alteration itself is separately signed and witnessed. Crossing out a name or writing in a new figure invalidates that change. If you want to make changes, either make a codicil (a formally executed amendment) or write an entirely new will.

How to Update Your Will

Life changes. Your will should too. There are two ways to update an existing will:

Codicil

A codicil is a formal amendment to an existing will. It must be executed with the same formalities as the original — in writing, signed, and witnessed by two independent witnesses (one in Scotland). A codicil works well for small, simple changes: amending an executor's address, updating a specific cash gift, adding a charity.

Codicils are less common than they used to be — because it's now easier and cheaper to simply rewrite the will entirely using an online service. Multiple codicils can also become confusing and increase the risk of inconsistency.

New will

For significant changes — new executor, new beneficiaries, changed asset distribution, major life events — writing a new will is cleaner. The new will should contain a revocation clause expressly stating that it revokes all previous wills and codicils. Destroy the old will once you have executed and stored the new one.

Whenever you update your will, also consider whether your Power of Attorney documents need reviewing. The two documents work together and should reflect the same trusted people.

Frequently Asked Questions

Do I need a solicitor to write a will in the UK?

No. There is no legal requirement to use a solicitor. A will written without a solicitor is fully valid provided it meets the formal requirements: the right age, mental capacity, in writing, signed at the end in the presence of two independent witnesses who also sign (one in Scotland). Solicitors add value for complex estates — IHT planning, business interests, overseas assets — but for straightforward situations, an online will-writing service is equally valid and significantly cheaper.

What makes a will legally valid in the UK?

In England and Wales: 18 or over, mental capacity, in writing, signed by the testator at the end, in the simultaneous presence of two witnesses who also sign. Scotland: 16 or over, subscribed (signed) by the testator, with one witness for self-proving status. Northern Ireland: same rules as England and Wales under local legislation.

Can I write my own will by hand in the UK?

Yes — a handwritten will is valid in England, Wales, and Northern Ireland provided it meets the formal requirements (signed in front of two independent witnesses who also sign). Scotland does not recognise unwitnessed handwritten wills made after 1995. Regardless of jurisdiction, handwritten wills are riskier — handwriting that is hard to read, unclear language, and missing clauses are common problems. A typed will drafted with a proper service avoids these risks.

What happens if I die without a will?

Your estate is distributed under the intestacy rules — a legal formula that bears no relation to your wishes. In England and Wales, unmarried partners receive nothing. Only married or civil partners and blood relatives inherit in a defined order. Your children may inherit directly without a trust, meaning a court appoints someone to manage the money until they turn 18. Close friends and charities receive nothing.

Does marriage cancel my existing will?

In England, Wales, and Northern Ireland — yes, automatically. If you marry without making a new will, your previous will is void and you die intestate. Scotland is different: marriage does not automatically revoke a Scottish will, but a surviving spouse gains automatic legal rights regardless of the will's terms. Either way, marriage is a trigger to review and update your estate planning documents.

How often should I update my will?

Review your will after any significant life event: marriage (which revokes it in England, Wales, and NI), divorce, birth of children or grandchildren, significant change in assets, death of a beneficiary or executor, or a move between UK jurisdictions. A general review every 3–5 years is good practice even without a specific trigger.

Related: Inheritance Tax UK 2026 — Thresholds, Nil-Rate Band & Planning Strategies | Scottish Wills — How Scots Law Differs | Power of Attorney UK — Types, Costs & How to Set One Up