Mirror Wills Explained — Are They Right for Couples in England & Wales?
This guide covers wills in England and Wales. Scottish law differs in some key areas.
Mirror wills are separate wills made by two people — usually a couple — that mirror each other's wishes. In England and Wales they are the most common will arrangement for couples and are legally valid, affordable, and straightforward to set up. However, there is one critical risk that most couples are not told about. This guide explains how mirror wills work, when they make sense, and when they do not.
What Is a Mirror Will?
A mirror will is one of two separate legal documents made by a couple. Each person has their own will, but the contents of both are either identical or very similar — they "mirror" each other.
The typical structure looks like this:
- Partner A's will: leaves everything to Partner B; if Partner B has already died, everything goes to their children equally
- Partner B's will: leaves everything to Partner A; if Partner A has already died, everything goes to their children equally
Mirror wills are one of the most popular and practical estate planning tools for couples in the UK because they are simple, flexible, and cost-effective. For details on how to make a legally valid will, see GOV.UK. For a broader overview, see estate planning for couples.
Mirror Wills vs Joint Wills — What's the Difference?
This is a common source of confusion.
Mirror wills are two separate wills. This is crucial because it means either person can change or cancel their will at any time without needing the other's permission. A joint will is a single document signed by two people, which is meant to cover both of them.
Joint wills are rare and outdated in the UK. They often lead to legal disputes and complications. That's why mirror wills have replaced joint wills as the modern, flexible solution for couples.
Mirror Wills vs Mutual Wills
A mutual will is legally binding after the first partner dies, preventing the survivor from changing their will. This sounds appealing — but in practice it creates serious problems.
Mutual wills are incredibly rigid and can cause huge problems if the survivor's circumstances change — for example, if they need money for care costs. For this reason, solicitors rarely recommend them. Mirror wills, based on trust, remain the standard for most couples.
The Benefits of Mirror Wills
- Cost-effective: Creating mirror wills is often more affordable than drafting two separate, distinct wills. Many solicitors offer discounted rates when couples opt for mirror wills. Online services make them even more accessible.
- Simple and clear: Mirror wills provide a straightforward way for couples to ensure their estate is distributed according to their shared wishes, helping avoid confusion and uncertainty about who inherits.
- Protects the surviving partner: Mirror wills are a mutual agreement between a couple to leave their whole estate to whoever outlives the other, protecting their financial future — particularly important for unmarried couples who would otherwise have no automatic right to inherit.
- Flexible: Each person can update their will at any time if circumstances change. This flexibility is one of the key reasons mirror wills are preferred over mutual wills.
- Covers children: Instructions can be disclosed in your will to distribute your estate to your children if you and your partner happen to die at the same time. You can also name the same guardians for any children under 18.
The Key Risk Most Couples Miss
The main risk of mirror wills is that they are not legally binding after the first death. The surviving partner can change their will entirely — and there is nothing to stop them.
Consider this real-world example: David and Anne, a married couple, wrote mirror wills leaving everything to each other, then to their two children. After Anne passed, David remarried but didn't update his will. Upon his death, his new spouse inherited the estate — leaving the children with nothing.
This isn't an unusual situation. Remarriage, estrangement, or simply a change of mind can all result in the original plan being undone after the first death.
When Mirror Wills Work Well
Mirror wills are the right choice when:
- You and your partner share the same wishes for your estate
- You want to leave everything to each other, then to the same beneficiaries
- Your family circumstances are straightforward — no children from previous relationships
- You understand and accept that the surviving partner can change their will later
- You want a cost-effective, simple solution
For many couples, the best outcome comes from mirror wills — they reflect what most partners want: everything to the survivor, then to the children.
When Mirror Wills May Not Be Enough
Blended families
Mirror wills don't always work well for blended families. For example, if a married couple each have children from previous relationships and the first party dies, nothing would stop the surviving spouse from making a new will that disinherits the stepchildren and leaves everything to their own children instead.
Second marriages
Similar risks apply with second marriages — the surviving partner may remarry, and their new spouse could inherit instead of the original beneficiaries.
Complex or high-value estates
Where Inheritance Tax planning, trusts, or overseas assets are involved, a more bespoke arrangement may be needed.
How to Add Protection: Trusts
If you want the simplicity of mirror wills but greater protection for your children, a trust can bridge the gap.
Life interest trusts let the surviving partner live in the family home but ensure it passes to chosen beneficiaries later. Protective property trusts ring-fence half the home's value for children and protect it from remarriage or future claims.
These approaches can help preserve wealth across generations and guard against remarriage or financial abuse. They are particularly worth considering for blended families or anyone with children from a previous relationship.
What Happens to a Mirror Will After Divorce?
Under the Wills Act 1837, any parts of your will that appoint your ex-spouse as executor or leave them any assets are automatically cancelled upon the finalisation of your divorce. However, the rest of the will remains valid. You should make a new will after any divorce to ensure your estate plan reflects your new circumstances.
Common Myths, Debunked
"It's one will for both of us." False. Mirror wills are two separate documents — each person has their own legally distinct will.
"You can't change it after one partner dies." False. The survivor can usually change their own will at any time, provided they have mental capacity.
"Mirror wills guarantee children inherit." Not automatically. The survivor could change their will unless safeguards like trusts are added.
"Only wealthy couples need mirror wills." False. They are suitable for most couples with shared estate planning goals, regardless of the size of their estate.
Mirror Wills at a Glance
| Feature | Mirror Wills |
|---|---|
| Two separate documents | ✅ Yes |
| Can be changed independently | ✅ Yes |
| Legally binding on survivor | ❌ No |
| Cost-effective for couples | ✅ Yes |
| Suitable for blended families | ⚠️ With caution |
| Can include trusts | ✅ Yes |
| Covers guardianship of children | ✅ Yes |
How Much Do Mirror Wills Cost?
Mirror wills are cost-effective because both wills are drafted together, making them cheaper than two entirely separate wills. Typical costs in England and Wales:
| Option | Typical cost |
|---|---|
| Online mirror will service | £50–£200 for both |
| Will writer | £150–£300 for both |
| Solicitor | £300–£700+ |
For most couples with straightforward circumstances, an online service provides everything needed at a fraction of solicitor fees.
Want to know more about how much does a will cost? Read our full pricing breakdown.
If you die without a will, your estate is distributed according to intestacy rules — which may not reflect your wishes at all.
You can make a will online quickly and affordably with Wills & Power.
*This article is for informational purposes only and does not constitute legal advice. This guide covers wills in England and Wales. Scottish law differs in some key areas. For complex estates or blended family situations, we recommend seeking independent legal guidance.*
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