Can AI help me write a will in the UK? It’s a question that combines two things people avoid thinking about — death and legal paperwork — which is probably why a third of UK adults still don’t have a will. AI will-writing tools promise to fix that: quick, cheap, done from the sofa. But wills are legal documents where mistakes have serious consequences, so the question deserves a careful answer: what AI can usefully do, where it falls short, and when you genuinely need a solicitor.

Can AI help me write a will in the UK? What it can usefully do

  • Education. “What happens if I die without a will in England?” “What’s the difference between an executor and a trustee?” “How does inheritance tax work?” AI explains wills jargon clearly — and understanding the concepts is half the battle. Most people delay will-writing from confusion, not laziness.
  • Thinking through decisions. AI is an excellent sounding board for the decisions a will requires: who should be guardians for the children, who gets what, who should be executor, what about the house? Talking it through with AI (then with your partner) turns vague intentions into concrete plans.
  • Drafting simple wills. For straightforward situations — everything to spouse, then to children equally — AI can draft a will document that covers the essentials. Several UK online will services now use AI-assisted drafting with human review.
  • Checklists and organisation. Listing assets, debts, beneficiaries, and wishes — AI helps you assemble the complete picture a will needs, ensuring nothing important is forgotten.
  • Explaining the formalities. The signing and witnessing requirements (see below) are where DIY wills most often fail — AI can walk you through them precisely.

The legal requirements AI can’t waive

For a will to be valid in England and Wales, it must meet strict formalities under the Wills Act 1837:

  • It must be in writing (printed is fine).
  • You must be 18+ and of sound mind.
  • It must be signed by you in the presence of two independent witnesses (not beneficiaries or their spouses — a gift to a witness is void).
  • The witnesses must sign in your presence.
  • It should clearly revoke previous wills and appoint executors.

AI can draft the words, but it can’t witness your signature — and getting the formalities wrong invalidates the whole thing. This is the most common DIY will failure, and no AI draft survives it. (Scotland and Northern Ireland have slightly different rules — specify your jurisdiction.)

When AI will-drafting isn’t enough: see a solicitor

  • Complex families: second marriages, stepchildren, estranged relatives, dependents with special needs — these need careful legal structuring that AI can’t reliably provide.
  • Significant assets or inheritance tax exposure: estates approaching or above the IHT threshold (£325,000 individual, with various reliefs) benefit enormously from proper tax planning — potentially saving tens of thousands. AI doesn’t do tax planning; solicitors and financial advisers do.
  • Business assets: shares in a company, business property relief, succession planning — specialist territory.
  • Vulnerable beneficiaries: children with disabilities, beneficiaries who can’t manage money — trust structures need professional drafting.
  • Foreign assets: property abroad involves other jurisdictions’ succession laws — genuinely complex.
  • Any doubt whatsoever: a solicitor-drafted will costs £150–£300 for simple cases in the UK. If there’s any complexity, that’s cheap insurance against a will that fails when your family needs it most.

Common will mistakes AI can help you avoid

Whether AI-assisted or solicitor-drafted, certain mistakes recur — and AI is good at flagging them. Forgetting digital assets: online accounts, cryptocurrency, digital photos — modern wills should address these; AI checklists include them where human memory doesn’t. Not updating beneficiaries: pensions and life insurance often pass via beneficiary nominations, not the will — AI can explain this crucial distinction that surprises many. Vague descriptions: “my jewellery to my daughter” works if there’s one daughter; with blended families, precision matters. Ignoring inheritance tax: AI explains the thresholds and reliefs (residence nil-rate band, spouse exemption, charitable giving reducing the rate) well enough for basic awareness — though planning needs professionals. DIY disasters: the classic failures — improper witnessing, unclear revocation of old wills, ambiguous language — are exactly what AI checklists are designed to catch. Use AI as your proofreader’s second pair of eyes, even on professionally drafted wills: “explain what this clause means in plain English” is a perfectly good use.

Lasting power of attorney: the companion document

While you’re sorting your will, consider the document people forget: Lasting Power of Attorney (LPA). A will handles your affairs after death; an LPA handles them if you lose mental capacity while alive — arguably more important, and certainly more urgent for older people. There are two types: property and financial affairs, and health and welfare. Without an LPA, families face the Court of Protection — slow, expensive, stressful. LPAs cost £82 each to register in England and Wales, and the forms are designed for completion without a solicitor (though advice helps for complex situations). AI can explain LPAs, help you think through attorney choices, and walk through the forms — same strengths and limits as with wills. Do both together; future you (and your family) will be grateful.

Wills sit within your broader financial planning — alongside pension provision, tax-efficient director pay and everyday money management.

The sensible middle path

For most people with straightforward affairs, the optimal approach is: use AI to understand the concepts, think through your decisions, and organise your wishes — then use a reputable online will service (£30–£100, with human/legal review) or a solicitor (£150–£300) for the actual document. You get AI’s convenience for the thinking and professional assurance for the legal document. What you shouldn’t do: print a raw AI draft, sign it without understanding the formalities, and assume you’re covered. The cost of a failed will falls on your grieving family — the worst possible time to discover a technicality.

Also remember: wills need updating. Marriage, divorce, children, property purchases, deaths — review your will every few years and after major life events. An AI reminder to review annually is a genuinely good use of the technology. And store the will safely: with your solicitor, a will storage service, or somewhere your executors can find it (tell them where — a will nobody can find might as well not exist).

The takeaway

AI can help you write a will in the UK by explaining the concepts, organising your decisions, and drafting simple documents — but it can’t replace the legal formalities (witnessing) or the judgment needed for anything beyond straightforward situations. The smart approach: AI for learning and planning, a proper will service or solicitor for the document, professional advice for anything complex. And whatever route you choose, do it this month — the best will is the one that exists. A third of UK adults dying intestate is a statistic; don’t be part of it. For impartial guidance, MoneyHelper’s wills guide and gov.uk’s wills overview are the reliable starting points.