Mirror Wills: How Couples Usually Write Their Wills

Mirror wills are exactly what they sound like: two separate wills, one for each partner, with matching terms. Typically each leaves everything to the other, and then — once both have died — to the same final beneficiaries, usually the children. They are the standard arrangement for married couples, civil partners and long-term partners, and because the drafting is nearly identical, will writers usually offer a discounted price for the pair.

What a typical mirror will says

• Everything to the surviving partner if they survive you (often by a stated period, such as 28 days).
• Then to the children (or other agreed beneficiaries) in equal shares if your partner has already died.
• The same executors and guardians in both documents, so whoever dies first, the arrangements are consistent.

The mechanics of making each will valid are the same as for any will — proper signing and witnessing rules apply, covered in our step-by-step guide to writing a will.

The catch: mirror wills are not binding on each other

Here is the part that surprises people. Mirror wills are two independent documents. Either of you can change yours at any time — including after one of you has died. The classic worry: the surviving partner remarries (which usually revokes their existing will automatically), and the children from the first relationship end up with nothing. Nothing in a standard mirror will prevents this.

If that risk matters to you — especially in blended families — the options include life-interest trusts in the will (the survivor can live in the house, but the children's share is protected) or, rarely, genuinely mutual wills, which are legally binding but inflexible and easy to get wrong. This is one of the situations where paying for proper advice earns its fee.

What mirror wills cost

Expect roughly one-and-a-half times the price of a single will rather than double — our will costs guide has current ranges for solicitors and online services. For couples with straightforward finances and shared children, a mirror pair from a reputable online service is often perfectly adequate.

When mirror wills are the wrong tool

Think beyond the standard pair if: either of you has children from a previous relationship, you own property in unequal shares or with others, one of you has significantly more assets, there is a business involved, or inheritance tax planning matters (see our inheritance tax guide). Matching wills only work when your wishes genuinely match — and stay matched.

This is general information about the law in England and Wales, not personalised legal advice. Rules, thresholds and processes change, and Scotland and Northern Ireland have different rules in places — for anything that depends on your own circumstances, it is worth speaking to a solicitor (ideally one accredited by STEP or Solicitors for the Elderly) or checking GOV.UK and Citizens Advice for current detail.