Wills · 9 min read · Published · Updated
Mirror Wills for Couples: What They Are, When They Work, and When You Need Something More
Mirror wills suit many couples, but not all. This guide explains when they work, when you need something stronger, and how to decide.
By Aaron Johnson, Consultant Solicitor and TEP, a solicitor in Bridlington who writes every guide himself.
Guides · Wills · No. 17 of 18Reviewed · 9 minutes
Mirror Wills for Couples: What They Are, When They Work, and When You Need Something More
What Are Mirror Wills?
Mirror wills are two separate wills made by a couple, usually spouses or civil partners, with matching terms. In most cases each partner leaves everything to the other, with the same fallback beneficiaries (usually the children) if both die together or the survivor has already died.
They are called mirror wills because each one mirrors the other, changing only the names.
Mirror wills are among the most requested documents in private client work, and for many couples they are the right choice. But they do not suit everyone, and in some situations they leave your estate open to risks you may not have thought about.
When Mirror Wills Work Well
Mirror wills are generally suitable where:
- You and your partner are married or in a civil partnership
- You have the same children and wish to leave your estate to them equally
- Your combined assets are below the inheritance tax threshold, or the spouse exemption and transferable nil-rate bands deal with your inheritance tax position
- Neither of you has children from a previous relationship
- You are both content for the survivor to have full control of the estate and to be free to change their own will at any time after the first death
In those circumstances, mirror wills are a straightforward and inexpensive estate plan.
The Risks of Mirror Wills
The biggest limitation of mirror wills is that they do not bind the survivor. After the first death, the surviving partner is free to change their will, and that can have serious consequences.
Remarriage. If the survivor remarries, their existing will is automatically revoked. The new spouse then has rights under the intestacy rules, possibly to the exclusion of the children from the first relationship.
Change of heart. Even without remarriage, the survivor may change who gets what: leaving more to one child than another, or benefiting a new partner.
Sideways inheritance. In a blended family, mirror wills carry a particular risk that assets meant for your children end up with your partner's children or a new partner instead.
None of this makes mirror wills the wrong choice. It does mean you should consider whether extra protection, such as a trust in your will, is right for you.
Alternatives to Mirror Wills
Where mirror wills do not protect you enough, there are three main alternatives.
Life interest trusts. A life interest trust in your will gives the surviving partner the right to live in your property and benefit from your estate for life, while the capital passes afterwards to the people you choose, usually your children. It is the main protection against sideways inheritance.
Discretionary trusts. A discretionary trust lets your trustees decide how to share assets among a named group of beneficiaries according to their needs at the time. It can help where your children's circumstances are uncertain, or to protect against a future divorce, bankruptcy or other claim.
Mutual wills. Mutual wills involve a binding agreement that neither of you will change your will after the first death. They are unusual in modern practice and bring their own difficulties, but they can suit particular circumstances.
Mirror wills and mutual wills compared
| Mirror wills | Mutual wills | |
|---|---|---|
| Each partner makes a matching will | Both partners agree not to change their wills | |
| Either partner can change their will at any time | Creates a binding legal contract between partners | |
| Simpler and cheaper to set up | More involved and usually more expensive | |
| No legal duty to keep the will after the partner dies | The survivor cannot change the agreed terms | |
| Best for couples with straightforward wishes | Sometimes used for blended families or larger estates |
Key Considerations for Couples
Before choosing mirror wills, ask yourselves five questions.
- Do either of you have children from a previous relationship?
- Is there a significant difference in the ages or health of each partner?
- Do you own property jointly and, if so, as joint tenants or tenants in common?
- Are you comfortable with the surviving partner having complete freedom to change the estate plan?
- Could a different arrangement save inheritance tax?
How you own your property matters most. As "joint tenants", your home passes automatically to the surviving owner, whatever your will says. As "tenants in common", each of you owns a defined share that your will can deal with, including by putting it into a trust for your partner and children.
Getting It Right
Mirror wills are a good starting point for many couples, but they deserve the same care as any other legal document. A short conversation with a solicitor will show whether mirror wills meet your needs or whether a slightly different structure would protect your family better.
Aaron drafts mirror wills, and a couple's wills with a trust in them, each at a fixed fee published on the fees page. To discuss your options, contact Safe Harbour Legal. Aaron advises couples on wills, trusts and estate planning, in person in Bridlington or by video call anywhere in England and Wales.
This guide is intended as general legal information and does not constitute legal advice. Safe Harbour Legal is a trading name of Legal Studio, authorised and regulated by the Solicitors Regulation Authority.
Written by Aaron Johnson, Consultant Solicitor and TEP · Law of England and Wales as at 20 March 2026 · Ends