Guardianship clauses for children in a will: how to get them right

The clause parents misunderstand most

Ask parents what a guardianship clause does and most will say the same thing: "it decides who gets my children if I die". That is not quite what the law says, and the gap matters. Under section 5 of the Children Act 1989, a guardian you appoint in your will normally steps in only when your child has no surviving parent with parental responsibility. If your ex-partner has parental responsibility, and most fathers do, your children will usually live with them if you die tomorrow, whatever your will says. Your chosen guardian waits in the wings until that parent also dies.

Understood properly, the clause is still one of the most important things a parent puts in a will. It is the only formal mechanism for saying who should raise your children if both parents are gone, and without it the decision falls to the family court. This guide covers who can make the appointment, when it takes effect, how it gets revoked without you noticing, and the two companions every guardianship clause needs: a trust for the money and a letter of wishes for everything the law cannot capture. It is general information about the law in England and Wales, not legal advice for your own family's situation.

Who can appoint a guardian, and how

Section 5 lets three groups appoint a guardian to act after their death: a parent with parental responsibility, an existing guardian, and a special guardian. The appointment does not strictly have to be in a will, but it must be in writing, dated and signed under s.5(5), and a will already meets those formalities while keeping the appointment alongside everything else your executors need. That is why the will is where almost everyone makes it.

The phrase "parent with parental responsibility" does real work here. Per GOV.UK's guidance on parental responsibility:

• Mothers have parental responsibility automatically.
• Fathers have it if they were married to or in a civil partnership with the mother when the child was born, or if they jointly registered the birth with her.
• An unmarried father not on the birth certificate can acquire it by a parental responsibility agreement with the mother or a court order.
• Step-parents never acquire it automatically, however long they have helped raise the child. Without an agreement or court order, a step-parent has no standing to appoint a guardian and no automatic right to care for a stepchild after the biological parent dies.

That last point catches blended families badly. A step-parent who has been the day-to-day parent for a decade can find, on their partner's death, that the child's future rests with a biological parent they barely know or with the court. If that describes your household, our guide to blended families and inheritance rights covers the wider picture, and it is a situation where taking proper legal advice early is worth far more than any clause drafted in isolation.

When the appointment actually takes effect

This is the core rule, and it is worth setting out precisely because so much general content skates over it. Under s.5(7) and s.5(8) of the Children Act 1989, your appointed guardian takes office on your death only if:

1. the child has no surviving parent with parental responsibility, or
2. a child arrangements order was in force naming you as the person the child was to live with (or you were the child's only or last surviving special guardian), in which case the appointment can take effect even though the other parent survives.

Otherwise, the appointment sits dormant and takes effect only when the surviving parent later dies. The practical consequences by scenario:

Situation at your death	Who raises the children
Other parent alive, has parental responsibility	The surviving parent. Your guardian appointment waits until that parent also dies.
Other parent alive, but a child arrangements order named you as the "lives with" parent	Your appointed guardian takes effect and shares parental responsibility with the surviving parent. Disputes go to the family court.
Both parents dead, guardians named in a will	The named guardian, automatically, with parental responsibility from the moment the appointment takes effect.
Both parents dead, nobody named	The family court appoints a guardian under s.5(1). Relatives can apply, but none has automatic priority.

Two refinements are worth knowing. First, an appointed guardian is not forced to serve: under section 6(5) of the Children Act 1989 they can disclaim the appointment in writing within a reasonable time of learning it has taken effect, which is why you should ask your chosen guardians before naming them, and name reserves. Second, separated parents can each make their own appointment, and both can take effect together after the second death, with the guardians sharing parental responsibility. If you and your ex-partner would pick different people, far better to discover and discuss that now than to leave two sets of guardians to work it out in grief.

How appointments get cancelled without you noticing

Section 6 of the Children Act 1989 revokes guardian appointments in several situations, and two of them regularly surprise people:

• Divorce or dissolution. If you appointed your spouse or civil partner as guardian and the marriage or civil partnership is later dissolved or annulled, the appointment is automatically revoked (s.6(3A) and s.6(3B)), unless the document shows a contrary intention.
• A new will. Revoking the will that contained the appointment revokes the appointment with it (s.6(4)). Every time you sign a new will, the guardianship clause must be carried forward deliberately, and a later appointment revokes an earlier one unless it is expressed as an addition (s.6(1)).

Marriage pulls in the opposite direction: marrying or entering a civil partnership generally revokes your whole existing will, guardianship clause included, unless the will was made in contemplation of that marriage. Our guide to updating a will after marriage or divorce walks through those revocation rules in full. The habit that protects you is simple: any family change (separation, new partner, new baby, a chosen guardian moving abroad or falling ill) is a trigger to reread the clause.

Guardianship moves the children. It does not move the money

A guardian gets parental responsibility: the legal authority to decide where the children live, where they go to school and what medical treatment they receive. What a guardian does not get is your estate. The children's inheritance is held and controlled by the executors and trustees of your will, and if your will simply leaves everything to your children, they take it outright at 18, with the trustees managing it until then.

A well-built will for parents of young children therefore has three working parts:

1. The guardianship clause, naming first-choice and reserve guardians.
2. A trust for the children's funds. At minimum this is the trust that arises automatically while beneficiaries are under 18; many parents go further and set an older inheritance age such as 21 or 25, or use a discretionary structure. Crucially, trustees can typically apply income and capital for the children's maintenance and education in the meantime, which is how the guardian's real costs (a bigger car, a loft conversion, school trips) get funded without handing the guardian the chequebook. Our guide to trusts in wills covers the structures in more detail.
3. A letter of wishes. The will says who; the letter of wishes says how. It can tell guardians what matters to you about schooling, religion, contact with both sides of the family and staying in touch with friends, and it can tell trustees how freely you want money released to support the household the children join. It is not legally binding, which is precisely its strength: you can update it any time without re-executing the will. See our companion guide to letters of wishes for what to include.

Whether the same people should be guardians and trustees divides opinion. Combining the roles is simpler: the people raising the children never have to ask permission to spend on them. Separating them builds in a check that protects the fund, and protects the guardians from any suggestion of mixing the children's money with their own. There is no universally right answer, but decide it consciously rather than by default.

A worked example: Priya and Daniel

Priya and Daniel are unmarried with two children, aged 4 and 7. Daniel jointly registered both births, so both parents have parental responsibility. Their combined estate, mostly a mortgaged house and life insurance, would be worth about £650,000 on a joint death. They make mirror wills, each appointing Priya's sister Meera as guardian, with Daniel's brother as reserve, leaving everything to the children at 21 with Daniel's brother and a family friend as trustees, plus a joint letter of wishes.

If Priya alone dies, nothing visible happens: Daniel, as surviving parent with parental responsibility, simply carries on, and Meera's appointment lies dormant. If both die in a common accident, Meera becomes the children's guardian automatically, without any court application, and the trustees can start releasing funds at once: contributing to Meera extending her house, covering childcare, and following the letter of wishes on keeping the children at their current school. Had Priya and Daniel named nobody, Meera and both grandmothers could each have applied to court, with the children's placement uncertain for months.

Choosing well: the questions that matter more than the wording

The drafting of the clause is short. The thinking behind it is not. Working through our making a will checklist will surface most of these, but for guardianship specifically ask: Are the people we are naming willing (have we actually asked)? Are they young and healthy enough to see a 4-year-old through to 18? Would the children have to move school, city or country? If we are naming a couple, what happens if they separate? Who is the reserve? And does the money we are leaving actually stretch to another family raising our children, or is more life cover needed, a question our guide to life insurance written in trust feeds into.

Finally, both parents should make wills, and the clauses should agree. A guardianship appointment only in one parent's will leaves a gap if the other parent dies second without one, and the pillar guide to making a will plus our walkthrough of signing and witnessing rules cover getting the document itself right: GOV.UK confirms a valid will needs you to be 18 or over, of sound mind, and to sign in the presence of two adult witnesses who cannot be beneficiaries.

If your family involves a separated parent, a step-parent without parental responsibility, or guardians living abroad, the interaction between the Children Act rules and your will is exactly the kind of thing worth an hour of a qualified will-writing solicitor's time. Getting the clause drafted around your actual family, rather than a standard one pasted in, is what makes it work on the day it is needed.