Will for Single Parents UK: Guardianship, Trusts for Children and Estate Planning

Updated 31 May 2026 · 9 min read · Wills & Family Planning

For a single parent, making a will is not just about distributing money — it is about ensuring that the people who care for your children and manage their financial future are the right people, with the right instructions. There are nearly three million single-parent families in the UK, and a significant proportion have no will. This guide explains the most important decisions a single parent needs to make.

The Two Core Questions for a Single Parent’s Will

Who will care for my children? — The guardianship appointment.
Who will manage my children’s money, and until when? — The trust structure and trustee appointment.

These are separate roles with separate responsibilities, and the people best suited to each may not be the same person.

Appointing a Guardian

Under section 5 of the Children Act 1989, a parent with parental responsibility can appoint a guardian for their child in their will. The guardian takes parental responsibility for the children after the appointing parent’s death — if there is no other person with parental responsibility surviving. Key points:

The appointment must be in writing, signed and dated. A will is the clearest and most reliable form — it is witnessed, dated, and publicly provable.
The other parent’s rights are not overridden. If the other parent has parental responsibility and survives you, they retain it. Your guardianship appointment only takes effect if no person with parental responsibility survives.
You can appoint more than one guardian — though two guardians who disagree creates complexity. One guardian is usually simpler.
Tell the person you are appointing. A guardian who discovers they have been appointed only on your death and is unprepared will find the role significantly harder. Discuss it in advance.

The guardian does not need to be in the same city as you currently live — but consider the practical implications of geography, capacity to care for additional children, and relationship with your children when choosing.

Creating a Trust for Children’s Inheritance

When a minor (under 18) inherits under a will, the inheritance must be held on trust until they are old enough to receive it. If you say nothing in your will, the statutory trusts under the Administration of Estates Act 1925 apply — the children receive their capital at 18. Most parents consider 18 too young for a potentially significant sum of money.

In your will, you can specify:

The vesting age — when the child takes the capital outright (typically 21, 25, or in phased tranches).
Income distribution before vesting — the trustees can pay income (or capital advances) for maintenance, education, and housing before the vesting age.
Accumulation — income not paid out can be rolled up in the trust for later distribution.
Discretion to advance capital early — for example, to help fund a house deposit or university fees before the vesting age.

A letter of wishes addressed to the trustees — not part of the will, and not legally binding — can explain your values, the schools you intended for the children, the financial habits you want instilled, and how you expect income to be used during the trust period. Trustees are not legally bound by the letter, but most follow it closely.

Choosing Trustees

Trustees manage the financial trust for the children. They should be:

People you trust absolutely with significant financial responsibility.
Financially competent — they will invest, manage, and account for the trust assets.
Likely to survive and remain willing to act for the trust’s duration (potentially 18–25 years if your children are young).
At least two — so no single trustee can act without the other’s knowledge.

Many parents appoint the guardian as one trustee and a financially experienced sibling or friend as the second. Some use a professional trustee (a solicitor or trust corporation) — this costs money but removes the risk of a lay trustee making investment mistakes or conflicts of interest.

What If No Guardian or Will Exists?

If a single parent dies without a will and with no other person with parental responsibility:

There is no guardian appointment — Social Services may become involved.
Relatives who want to care for the children must apply to the family court for a child arrangements order or special guardianship order.
This process takes months, is contested, and the outcome is decided by the court — not by your wishes.
The children’s financial inheritance falls under the statutory trust — capital at 18, regardless of your intentions.

For a single parent, the risks of dying without a will are significantly greater than for most other families. The estate planning decisions that take 30 minutes to make in a will can prevent months of court proceedings and ensure the right people care for your children.

The Single Parent Estate Planning Checklist

✓Make a will — appoint guardians, set the vesting age, name trustees
✓Write a letter of wishes — guidance on schools, values, financial priorities, special circumstances
✓Take out life insurance — term policy written in trust, sized to replace your income until youngest child finishes education
✓Make an LPA (health and welfare) — someone needs to make medical decisions if you lose capacity
✓Make an LPA (property and financial affairs) — financial management if incapacitated
✓Update pension and life insurance nominations — ensure benefits go to the trust/trustees for children
✓Tell your guardian and trustees — discuss the role, share your letter of wishes
✓Review regularly — as children age, as relationships change, as financial circumstances change

FAQs

What is a guardian and how do I appoint one in my will?

A guardian is a person appointed to have parental responsibility for a child after the death of the parent(s). Under section 5 of the Children Act 1989, a parent with parental responsibility can appoint a guardian to act after their death. The appointment must be in writing, signed and dated. A will is the most common and reliable way to make the appointment — but a separate signed and dated document also works. Key points: (1) The guardian takes effect immediately on the appointing parent's death if there is no other person with parental responsibility surviving — if the other parent (with parental responsibility) is still alive, the guardian does not automatically take over; the surviving parent retains sole parental responsibility. (2) Parental responsibility automatically belongs to both parents if they were married, or to the mother in all cases and the father only if listed on the birth certificate or by court order. (3) An appointment can be revoked at any time by a new written document or a later inconsistent will provision. The guardian you appoint should be someone who knows your children, shares your values, and is practically able to care for them — ideally someone you have discussed this with before naming them.

What happens to my children if I die as a single parent with no will?

If you die without a will (intestate), there is no guardian appointment. Parental responsibility: if the other parent has parental responsibility (was married to you, or is on the birth certificate), they automatically become the sole carer. If neither parent survives or only one had parental responsibility, the local authority may become involved and Social Services may apply to the family court for a care order or placement order. A relative or other person wishing to care for the children must apply to the family court for a child arrangements order or special guardianship order — a potentially lengthy and contested process. Financial provision: without a will, your estate passes under the intestacy rules (Administration of Estates Act 1925). If the children are minors, their shares are held on the statutory trusts until they turn 18 — they receive the capital on reaching 18, which many parents consider too young. Making a will allows you to specify a higher age for distribution (21, 25, or even older) and to build in income distributions before that age.

Should the guardian and the trustee be the same person?

Not necessarily, and in many cases it is better to keep them separate. The guardian is responsible for the physical care and upbringing of the children. The trustee manages the financial trust holding the children's inheritance. Separating the two roles provides a check and balance: the guardian cannot unilaterally access the trust funds for their own benefit or make financial decisions without the trustee's involvement; the trustee cannot make decisions about the children's upbringing without the guardian's input. In practice, the guardian and trustee must work together — the guardian requests money from the trustees for the children's needs (school fees, housing, living expenses) and the trustees consider those requests in light of their fiduciary duties. Many parents appoint the guardian as one of two or more trustees, so the guardian has input into financial decisions without having sole control. Whoever you appoint, discuss the role with them first — both guardianship and trusteeship are significant commitments.

At what age should children receive their inheritance in my will?

There is no legally required age for a child to receive an inheritance in a will — it is a matter of your choice. The statutory trusts under the intestacy rules give children their capital at 18. Many parents consider 18 too young — a lump sum at 18 can be spent unwisely before the child has the maturity to manage it. Common options in a will: (1) At 18 — simple but creates risk of a young person managing a significant sum without guidance. (2) At 25 — widely considered an appropriate balance between protection and practicality; the child can receive income in the meantime. (3) At 21 with trustee discretion to advance capital earlier for education or housing. (4) At 30 or in phased tranches — suitable for larger estates or children with specific vulnerabilities. The trustees typically have discretion to make income distributions for maintenance and education before the capital vesting age. A letter of wishes can guide the trustees on how you expect income to be used (school fees, living expenses, university costs) without legally binding them, which preserves their discretion in unanticipated circumstances.

What if the other parent is in the picture — does my will override their parental responsibility?

No. If the other parent has parental responsibility and survives you, they retain full parental responsibility for the children. Your will's guardianship appointment does not override this. The guardian you name only takes effect if no person with parental responsibility survives. This is an important point: if you have concerns about the other parent's ability to care for the children (perhaps because of addiction, domestic abuse, or instability), a will alone cannot prevent them from having care. The appropriate legal route is a child arrangements order from the family court — and you should seek specialist family law advice if this applies. For the financial side: even if the other parent has parental responsibility, your estate (and the trusts you create) passes according to your will. The other parent does not automatically receive control over the children's inheritance — the trustees you appoint control the trust funds, not the other parent.

What other estate planning steps should a single parent take alongside making a will?

Beyond the will, single parents should consider: (1) Life insurance — a term life insurance policy paying a lump sum on death provides the financial foundation that makes the trust in the will meaningful. A policy in trust (written as a trust) means the payout does not enter the estate (avoiding IHT and probate delay) and goes directly to the trustees for the children. Aim for sufficient cover to replace your income until the youngest child finishes education. (2) Lasting Power of Attorney for health and welfare — if you lose capacity, someone needs to make medical decisions; this is especially important for a single parent with no co-parent to rely on. (3) Lasting Power of Attorney for property and financial affairs — someone needs to manage your finances if you are temporarily incapacitated. (4) Update beneficiary nominations — pension death benefits, workplace death-in-service payments, and life insurance nominations should reflect your updated estate plan. (5) Letter of wishes — write a detailed letter to your trustees and guardian about your values, your children's needs, schools you have chosen, financial habits you want instilled, and any special circumstances. This is not legally binding but is invaluable guidance.

Make Your Will Today — Your Children Need This

As a single parent, your will is the document that ensures your children are cared for by the right people and their inheritance is managed responsibly. WillSafe’s DIY will kit for England and Wales includes full guardian and trust provisions — everything a single parent needs in a valid will.

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