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Making a will when you have young children

Quick answer

If you have children under 18, your will is where you legally choose who would raise them if the worst happened. Without one, a court decides who becomes their guardian, and your children inherit everything outright at 18. Making a will takes about 15 minutes.

The question every parent avoids

Nobody with young children wants to think about dying — so most don't, and the will stays on the to-do list for years. But here is the legal reality: your will is the only place you can appoint testamentary guardians — the people who would raise your children if you and their other parent both died. A conversation, a letter of wishes, or a family understanding has no legal force. Only a will does.

One detail catches people out: to appoint a guardian you must have parental responsibility. Mothers have it automatically. Unmarried fathers have it if they are named on the birth certificate (for births registered after December 2003) or have acquired it by agreement or court order. If that is you, sorting your legal position is part of sorting your will — see writing a will with children for the full picture.

What happens if you die without a will

  • A court decides who raises your children. Social services and the family court choose a guardian — and the person they pick may not be the person you would have chosen. Family members can end up in dispute, with the children caught in the middle.
  • Your children inherit outright at 18. Under intestacy, money held for a child is handed over in full on their eighteenth birthday — whether that is a few thousand pounds or the family home.
  • The money may not land where you expect. If you are married, your spouse gets your personal chattels, the first £322,000, and half of anything left — your children share the other half. If you are not married, your children get everything and your partner gets nothing, which can leave the person actually raising them struggling financially.

What your will lets you do

A will turns all of this from the state's decisions into yours. You can:

  • Name guardians — and substitutes — so your children go to people you chose, in the order you chose them.
  • Choose your executors and trustees — the people who manage the money until your children are old enough (see what an executor does).
  • Set the age your children inherit — 18, 21 or 25 — with trustees able to release money earlier for their education and upkeep.
  • Look after the survivor first. The usual structure leaves everything to your partner, with your children as the backstop — so the family is provided for at every step.

When you need a solicitor instead

An online will is right for most young families — but not all. We are will writers, not a law firm, and we would rather send you elsewhere than sell you the wrong document. Speak to a solicitor if:

  • you have a disabled or vulnerable child whose means-tested benefits need protecting through a discretionary trust;
  • you have a blended family and want to provide for a new partner while ring-fencing money for children from a previous relationship;
  • your estate is large enough that inheritance tax planning (the nil-rate band is £325,000, with a further £175,000 residence band for homes passing to children) needs proper advice;
  • you expect a dispute over guardianship — for example from an ex-partner or grandparents.

Our guide do I need a solicitor for a will? walks through the boundary honestly.

How to get it done this week

If your situation is straightforward — which most are — you can finish your will in about 15 minutes: answer plain-English questions, name your guardians and substitutes, download instantly. It costs £35, one-time, with free updates for life and no upsells — so you can change guardians as your children grow and relationships change. Start your will here.

Then make it legally binding: print it and sign it in wet ink in the presence of two witnesses who are together with you at the same time (the formalities in s.9 of the Wills Act 1837). A guardianship wish in an unsigned document is just a wish.

Frequently asked questions

Name your children's guardians in 15 minutes

Answer simple questions, download instantly, and update free as your family changes.

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Written by Eleanor Vance, Will-writing professional at SwiftWill. Checked by SwiftWill's legal content review against primary sources (gov.uk and legislation.gov.uk). Last reviewed July 2026.