Mirror wills are a popular choice for couples in the UK. They’re simple, affordable, and ensure that each partner’s wishes reflect the other’s. But life doesn’t always stay the same. Relationships change, new marriages happen, and family dynamics can shift.
One of the most common questions we hear is:
“If one of us remarries after the other dies, what happens to our mirror wills?”
It’s an important question — because remarriage can have serious implications for your estate plan. In this guide, we’ll explain how remarriage affects mirror wills, what risks it creates for your beneficiaries, and how you can protect your wishes for the future.
What Are Mirror Wills?
Mirror wills are two separate wills, usually made by couples, that mirror each other’s terms. Typically:
- Each person leaves everything to their partner.
- When both have passed away, the estate passes to the same chosen beneficiaries, such as children or grandchildren.
They’re flexible — either person can change their will at any time — and they’re one of the most common choices for couples making their first wills together.
You can read more about how they work in our Mirror Wills Explained: The 2025 Guide for UK Couples.
Does Remarriage Cancel a Will?
Yes — in most cases, marriage automatically cancels (revokes) any existing will.
This rule often takes people by surprise. If you remarry after your mirror will has been made, that will usually becomes invalid, unless it was written in contemplation of marriage to your new spouse.
That means if you remarry and don’t make a new will, your estate could be distributed according to intestacy rules, rather than your original wishes.
So if you and your partner currently have mirror wills, and one of you later remarries, those wills may no longer be valid or effective.
What Happens If the Surviving Partner Remarries?
When one partner dies, the surviving partner is completely free to change their will — even if the couple had mirror wills.
That flexibility is part of what makes mirror wills appealing. But it also creates a potential risk.
For example:
- Alex and Taylor have mirror wills leaving everything to each other, and then to their children.
- Alex passes away first.
- Years later, Taylor remarries and makes a new will leaving everything to the new spouse.
In this situation, Alex’s original intentions — that their children inherit after Taylor — may never be fulfilled. The new marriage and new will have completely changed what happens to the estate.
Can Mirror Wills Stop This From Happening?
Unfortunately, no.
Mirror wills are not legally binding after one partner has passed away. The surviving partner can change their will or make a new one at any time.
This flexibility works well for many couples, but it means that mirror wills cannot prevent assets being redirected after a remarriage or new relationship.
If protecting children or specific beneficiaries from future changes is important to you, there are other options available.
Using Trusts to Protect Children’s Inheritance After Remarriage
One effective way to safeguard assets for your family is to include a trust within your will.
For example, a life interest trust can:
- Allow your surviving partner to continue living in your home or receive income from your assets for the rest of their life.
- Ensure that the underlying assets are ultimately passed to your chosen beneficiaries, such as your children.
This type of arrangement gives your partner security, while still protecting your children’s inheritance — even if the surviving partner remarries or makes a new will later.
You can learn more in our Asset Trusts Guide.
Should You Consider Mutual Wills Instead?
Mutual wills are sometimes used when couples want their agreement about beneficiaries to be legally binding.
Once one partner dies, the surviving partner cannot change their will. This can provide certainty, but it removes flexibility — which can be difficult if circumstances change in the future.
For most couples, mirror wills remain the better choice. However, in blended families or second marriages, mutual wills or trust-based wills may be worth considering.
You can compare the two in our Mutual Wills vs Mirror Wills Guide.
Mirror Wills vs Mutual Wills vs Trust Wills
Many couples wonder how mirror wills compare to other options like mutual or trust wills — especially when thinking about remarriage or blended families. The table below outlines the key differences to help you decide which approach best fits your circumstances.
| Feature | Mirror Wills | Mutual Wills | Trust Wills |
|---|---|---|---|
| Can Be Changed After One Partner’s Death | ✅ Yes | ❌ No | ✅ Yes |
| Legally Binding Agreement | ❌ No | ✅ Yes | ✅ Yes |
| Protects Children’s Inheritance After Remarriage | ⚠️ Partial | ✅ Yes | ✅ Yes |
| Flexibility During Lifetime | ✅ High | ❌ Limited | ✅ Moderate |
| Complexity & Cost | 💷 Low | 💷 Medium | 💷 Higher |
| Best For | Couples wanting flexibility | Couples seeking binding legacy | Families needing asset protection |
Comparison chart showing the key differences between mirror wills, mutual wills, and trust wills in the UK.
For a deeper breakdown, visit our Mirror Wills Explained: The 2025 Guide for UK Couples
How to Future-Proof Your Mirror Wills
If you’re worried about how remarriage could affect your plans, there are simple steps you can take to protect your wishes:
- Review your will regularly. Major life events — such as marriage, divorce, or the birth of a child — are good times to check that your will still reflects your intentions.
- Include clear provisions. You can include a clause stating that the will is made “in contemplation of marriage” if a future marriage is planned.
- Consider a trust. Trusts can help balance fairness between a surviving partner and children from a first marriage.
- Keep communication open. Talk with your family about your wishes — it can prevent misunderstandings later.
FAQs
Does marriage cancel a mirror will?
Yes. Unless your will was made “in contemplation of marriage,” remarriage automatically revokes it.
Can mirror wills stop a new partner inheriting?
Not by themselves. A new marriage or new will can override them. Using trusts or mutual wills can offer more protection.
What happens if the surviving partner remarries and dies without a new will?
Their estate would be distributed under intestacy rules, which may not align with your original wishes.
How often should we review our mirror wills?
Every few years — or sooner if there’s a major life event such as marriage, divorce, or a significant change in assets.
Conclusion
Mirror wills are a simple and effective way for couples to plan together, but they don’t provide long-term protection if one partner remarries.
A new marriage can revoke existing wills entirely, and a surviving partner is always free to make new plans.
If you want to make sure your assets ultimately reach the people you choose, it’s important to review your wills regularly and consider adding extra layers of protection through trusts or other planning options.
To learn more about how mirror wills work — and how to safeguard your wishes — visit our Mirror Wills Explained: The 2025 Guide for UK Couples.