Mirror Wills: What Mirror Wills Are and When to Use Them

When you plan your estate with your partner you may hear the term mirror wills a lot. Mirror wills are a common, straightforward way for couples to make matching arrangements for each other and for their children. This article explains what mirror wills are, the benefits and limitations, and practical next steps you can take in England and Wales.

What is a mirror will?

A mirror will is simply a pair of separate wills, usually made by couples, where each will makes nearly identical provisions. Each partner leaves their estate to the other on first death, and then to the same beneficiaries, often their children, on second death. The documents "mirror" one another in terms of executors, gifts and residuary beneficiaries.

Mirror wills versus joint wills and mutual wills

There is no legal document called a joint will in England and Wales, so you cannot have a single will that covers two people. Mirror wills are two individual wills. There is also the concept of mutual wills, which can create a binding agreement that prevents the survivor from changing certain provisions. Mutual wills are rare and complex, and they usually require specific legal advice and clear evidence of an agreement. If you are considering something binding, seek specialist advice before you sign anything.

How mirror wills work in practice

Typically, each of you appoints the same executors and leaves assets to the surviving spouse, with the estate passing to children or other named beneficiaries on the survivor's death. This is common where you share a family home and want to ensure the same long-term plan for the estate. Each will is separately signed and witnessed, so either of you may revoke or change your own will at any time while alive.

Bear in mind that marriage or civil partnership will automatically revoke a previously made will in most cases, unless the will was made in contemplation of that marriage. If the surviving spouse later marries, forms a civil partnership or makes a new will, the original mirror arrangement may no longer apply, which could affect who inherits. For guidance on intestacy rules if someone dies without a valid will, see the UK Government guidance: What to do if someone dies without a will.

Pros and cons of mirror wills

• Pros: Simple to prepare, cost effective for couples with shared plans, and ensures initial support for the surviving spouse.
• Cons: Each person can change their will, so the survivor could alter the plan after the first death. Life events such as remarriage may unintentionally override original wishes. Mirror wills do not provide a binding long-term guarantee unless you enter a mutual wills arrangement.

Common risks and how to manage them

You can reduce risks by reviewing your wills regularly, especially after major life events like marriage, separation, the birth of a child, or a significant change in assets. If you want to protect children’s inheritance even if the surviving spouse remarries, a trust can be used as part of a will to ring fence assets.

Alternatives and options to consider

• Life interest trust: This can be included in a will so the surviving spouse can live in and benefit from the property during their lifetime, but the capital ultimately passes to your chosen beneficiaries. This often requires you to change property ownership from joint tenants to tenants in common so that each partner’s share can pass under the will.
• Mutual wills: If you want a binding arrangement preventing changes after the first death, mutual wills may be an option, but they are legally complex and need specialist advice.
• Other estate planning tools: Consider trusts for vulnerable beneficiaries and, separately, Lasting Powers of Attorney so the right people can manage affairs if you cannot. See our lasting powers of attorney service for more information: Lasting Power of Attorney.

Practical examples

Example 1: You and your partner each make mirror wills leaving everything to the survivor, then to your two children equally. You both own your home as tenants in common, and your will sets up a life interest trust so your share passes to your children after the survivor dies.

Example 2: You both sign mirror wills but one partner later remarries and makes a new will leaving assets to a new spouse. Without a trust or mutual wills, the original plan for the children could be changed, which may not be what you intended.

Next steps

If you think mirror wills might suit your family, speak to a professional who can explain how trusts, property ownership and mutual wills may affect your plans. For help making or updating your wills, book a consultation with our will writing team: Will Writing.

Need quick answers or want to start now? Contact our team to discuss your situation and the best option for your family: Contact us. You can also create a straightforward will online if your affairs are simple: Online Will.

For more about setting up trusts as part of your will, see our page on trusts: Trusts. If someone has already died and you need help with the estate, our probate services can guide you through the process: Probate.

Whatever you decide, regular reviews and clear written instructions will help ensure your wishes are followed. If you want a plan that offers more protection for children or long-term certainty, ask about trusts and mutual wills when you speak to an advisor.