How Family Trusts Work in the UK: Settlors, Trustees, Beneficiaries and Fiduciary Duties

At its core, a trust is a legal arrangement under which one or more people (the trustees) hold and manage assets — such as money, investments, land or buildings — for the benefit of one or more other people (the beneficiaries) in accordance with a formal legal instrument known as a trust deed or a will.

Understanding a trust begins with its three participants. The settlor is the person who puts assets into the trust and defines the rules of the arrangement in the trust deed (often accompanied by a confidential, non-binding Letter of Wishes guiding the trustees on how the settlor hopes they will exercise their powers). The trustees are the legal owners who administer the trust fund day to day. The beneficiaries are the individuals — or defined class of people, such as children and grandchildren — entitled or eligible to benefit from the trust's income or capital.

Many family trusts in the UK are 'will trusts' (testamentary trusts): they are written into a person's will and only come into existence when that person dies. Until death, the testator retains full ownership and control of their assets and can amend or revoke the will at any time while they have capacity.

By contrast, a 'lifetime trust' (inter vivos settlement) is established and funded while the settlor is alive. Because transferring assets into a lifetime trust immediately changes legal ownership and can trigger immediate Inheritance Tax, Capital Gains Tax or Stamp Duty Land Tax consequences, lifetime trusts require thorough personalised legal and tax advice before any transfer takes place.

1. Bare Trusts (Simple Trusts): The beneficiary has an immediate and absolute right to both the capital and income of the trust, though the trustees hold legal title until the beneficiary reaches age 18 in England and Wales (or 16 in Scotland). Bare trusts are commonly used to hold straightforward gifts or legacies for minor children.

2. Interest in Possession (Life Interest) Trusts: A named 'life tenant' has a legal right to receive the net income generated by the trust (or to occupy a trust property, such as the family home, rent-free) during their lifetime or until a specified event. When the life interest ends, the underlying capital passes to the 'remaindermen' (for example, the settlor's children). Life interest trusts are widely used inside wills by couples in second marriages or blended families who want to ensure a surviving partner has a secure home for life while ring-fencing the deceased partner's share of the property for their own children.

3. Discretionary Trusts: No single beneficiary has an automatic right to income or capital. Instead, the trustees have discretion over which beneficiaries from a specified class receive distributions, how much they receive, and when. Discretionary trusts provide flexibility where future family circumstances are uncertain, or where a beneficiary may face divorce, bankruptcy or financial vulnerability.

4. Trusts for Vulnerable or Disabled Beneficiaries: Where a beneficiary qualifies as a disabled person or a bereaved minor under the Finance Act 2005, a dedicated trust allows trustees to manage funds on their behalf without jeopardising means-tested support and can qualify for special Income Tax, Capital Gains Tax and Inheritance Tax treatment.

Agreeing to act as a trustee is a serious legal commitment, not an honorary title. Under the Trustee Act 1925 and Section 1 of the Trustee Act 2000, trustees must exercise reasonable care and skill, act strictly within the powers of the trust deed, treat different classes of beneficiaries fairly and impartially (for example, balancing a life tenant's need for income against the remaindermen's interest in preserving capital), review trust investments suitably, keep clear accounts, and comply with HMRC registration and tax filing rules.