How to Write a Will in the UK: Legal Requirements (2026)

What Makes a Will Legal in England and Wales?

For a will to be valid in England and Wales, it must meet four requirements:

1. You must be 18 or over (exceptions apply for members of the armed forces)
2. You must have testamentary capacity — be of sound mind and understand what you are doing
3. The will must be in writing — typed or handwritten
4. You must sign it in front of two witnesses, who must both sign in your presence — witnesses cannot be beneficiaries or their spouses

What Should a Will Include?

• Executor(s) — who will administer your estate after you die
• Beneficiaries — who inherits your assets and in what proportions
• Specific gifts — items or amounts to specific people or charities
• Residuary estate — what happens to everything not specifically gifted
• Guardian — who should care for your children if both parents die
• Funeral wishes — optional but useful for your family

Can I Write My Own Will?

Yes, a DIY will is legally valid if it meets the requirements above. However, homemade wills are among the most common sources of estate disputes and challenges in English law. Common problems include:

• Ambiguous wording that creates uncertainty about intent
• Failing to account for all assets
• Not updating after divorce (marriage revokes a will; divorce does not)
• Witnessing errors
• Not considering inheritance tax implications

For most people, a professionally drafted will from £69 is far cheaper insurance than litigation after death.

Step-by-Step: How to Write Your Will

Six concrete steps from "thinking about it" to a signed, legally valid will:

1. Inventory your estate. List your assets (home, savings, investments, pension, business, vehicles, jewellery, digital assets) and rough values. List your debts (mortgage, loans, credit cards). The difference is what you're distributing.
2. Decide who gets what. Specific gifts ("my diamond ring to my niece Emma"), pecuniary gifts ("£5,000 to my brother John"), and the residue ("everything else equally to my three children"). Be specific to avoid ambiguity.
3. Choose your executor(s). One or two trusted people who'll administer your estate after death. Adult children, siblings, or a professional executor service like ClearLegacy.
4. Appoint guardians for any minor children. Discuss it with the proposed guardians first.
5. Draft the document. Use a professional service (ClearLegacy from £69) or solicitor — DIY kits work but the error rate is high. Online services walk you through a structured questionnaire that catches the standard pitfalls.
6. Sign and witness. Sign the will in the presence of two independent adults (not beneficiaries, not their spouses). Both witnesses sign in your presence and in each other's presence. All three signatures should be made on the same occasion, at the same place, with all parties seeing each other sign.

Choosing Your Executors

The executor is the person who carries out the will after your death — applying for probate, paying debts and taxes, and distributing assets to beneficiaries. Choose someone:

• Trustworthy — they'll have complete legal access to your estate
• Organised and detail-oriented — there's significant paperwork (HMRC IHT forms, probate application, asset valuations, beneficiary distributions)
• Younger than you, ideally — you want them to outlive you
• UK-based — overseas executors face additional administrative complexity
• Willing — always ask before naming someone

You can name up to four executors. Most people name one or two, with a substitute named in case the first choice predeceases or declines. For complex estates, naming a professional alongside a family member combines local knowledge with administrative expertise.

Choosing Guardians for Minor Children

If you have children under 18, the most important provision in your will may not be about money — it's the appointment of a guardian. Without a named guardian in a valid will, if both parents die before the children reach 18, the courts decide who raises them. That process is slow, contentious, and emotionally exhausting for the children.

Considerations when choosing:

• Stability and values. The person should be someone you'd trust to raise your children the way you would.
• Age and health. A 70-year-old grandparent is less ideal than a 40-year-old sibling for a 2-year-old child.
• Location. A guardian in the UK is logistically simpler than one overseas (schools, healthcare, immigration).
• Their consent. Always discuss before naming. Guardianship isn't legally binding — they can refuse — so getting genuine agreement matters.
• Financial provision. Consider a separate trust or specific bequests to fund the guardian's costs of raising your children. Without this, the guardian inherits the responsibility but not the resources.

Witnessing — The Practical Rules

Witnessing is where the most DIY wills fail. The rules under the Wills Act 1837 are strict and unforgiving:

• Two witnesses, both adults, both of sound mind.
• Neither witness can be a beneficiary (or the spouse of a beneficiary). If they are, any gift to them in the will becomes void — the rest of the will may stand, but they get nothing.
• All three signatures on the same occasion. You sign in front of both witnesses; both witnesses then sign in front of you. Witnesses don't need to read the will, but they need to see you sign it.
• Use a fixed-position pen. All three signatures should use the same pen on the same paper. Don't post a will between witnesses by email or courier; this almost certainly invalidates it.
• Initial each page. If the will runs to multiple pages, initialling each page protects against later challenges that a page was substituted.

Good witness choices: neighbours, work colleagues, friends who aren't named in the will, your GP. Bad choices: anyone you've left a gift to, anyone married to such a person, anyone under 18.

Common Mistakes That Invalidate or Damage a Will

• Witness is a beneficiary. The single most common DIY failure. Gift to that witness becomes void.
• Marriage after the will was written. Marriage automatically revokes a previous will unless the will was made "in contemplation of" that marriage.
• Ambiguous language. "I leave my house to my children" — but what if there are step-children? Adopted children? Unborn grandchildren? Defined terms matter.
• No residue clause. If your will lists specific gifts but doesn't say what happens to "everything else", the residue passes under the intestacy rules — defeating the purpose of the will entirely.
• Handwritten amendments after signing. Crossing out and writing in the margin invalidates that section, and may invalidate the whole document. Use a codicil or write a new will.
• Original signed copy lost. An unsigned photocopy or scan generally cannot be admitted to probate. The original must be findable.
• Executor predeceases you. Without a named substitute, the court appoints an administrator instead, which adds time and cost.

Where to Store Your Signed Will

A perfect will that can't be found at the right moment may as well not exist. Three options:

• At home, in a fireproof safe. Free. Tell at least your named executor (and a backup person) where it is. Risk: house fire, flood, accidental destruction.
• With a solicitor or will-storage service. Typically £20–£50/year. Solicitors store wills in fire-proof archives indefinitely. Risk: the solicitor firm closing, you forgetting which firm.
• National Will Register (Certainty). £30–£60 one-off. Doesn't store the will itself, but records its location so executors can find it. A reasonable belt-and-braces option alongside home storage.

The Principal Registry of the Family Division also offers a £20 lifetime storage service — the will is held in the National Probate Service archive in London until your death.

How Much Does It Cost to Write a Will?

Life Events That Should Trigger a Will Review

Even a perfectly drafted will doesn't stay current forever. Review yours after any of these:

• Marriage or civil partnership. Critical — marriage automatically revokes a previous will in England and Wales unless that will was specifically made in contemplation of the marriage. Make a new will before or shortly after the wedding.
• Divorce or dissolution. Doesn't automatically revoke the will, but treats a former spouse as if they had died for inheritance purposes. Gifts to them generally fail, but the rest of the will stands. A clean new will is cleaner than relying on the partial-revocation rule.
• Birth or adoption of a child. Update the will to include them as a beneficiary, and consider whether the appointed guardians still fit.
• Death of a beneficiary or executor. Especially if you only named one executor or didn't include a substitute clause for a deceased beneficiary's share.
• Significant change in assets. Inheriting money, selling a business, buying or selling property, retirement, taking on substantial debt.
• Moving abroad. Wills made in England and Wales may not be recognised everywhere. Conversely, foreign wills may not cover UK assets correctly. Specialist cross-border advice is worth getting.
• Starting a business. Business succession is rarely covered by a standard will — consider whether Business Property Relief applies and whether a separate trust structure is needed.
• Children turning 18. Guardianship clauses become moot. You may want to update the timing or structure of gifts to adult children.

Outside of life events, a 5-year review cadence is sensible. Tax rules change, family circumstances shift, and assumptions made a decade ago may no longer hold.

How to Update a Will

Never make handwritten amendments to a signed will — this can invalidate the whole document. To change a will you have two options:

• Codicil — a separate document making a specific amendment, signed and witnessed in the same way as the original will
• New will — the simplest option for significant changes; a new will should explicitly revoke all previous wills

You should review your will after any major life event: marriage, divorce, birth of children or grandchildren, significant change in assets, or death of a beneficiary.