Trustee Investment Duties Under the Trustee Act 2000: A Complete Guide

Trustees occupy one of the most demanding positions in English law. They hold assets not for their own benefit but for the benefit of others — typically beneficiaries under a trust deed — and the standard to which they are held in respect of investment decisions has evolved significantly over the past quarter-century. The Trustee Act 2000 modernised and codified trustee investment duties, replacing the restrictive "prudent man" standard with a more flexible but more demanding framework. Understanding those duties is essential for anyone serving as a trustee, advising trustees, or structuring trusts for estate planning or wealth transfer purposes.

The Statutory Power of Investment

Prior to the Trustee Act 2000, trustees had only limited statutory powers of investment, supplemented by trust deed provisions. The 2000 Act swept this away. Section 3 provides trustees with a general power to "make any kind of investment that they could make if they were absolutely entitled to the assets of the trust." This is a very broad power, extending to equities, bonds, alternatives, direct property, and any other asset class.

The breadth of the power does not, however, mean that trustees are free to invest as they please. The wide investment power is qualified by the "standard investment criteria" (section 4) and the duty to obtain advice (section 5). The trust deed itself may restrict the investment power further — trustees must always check the deed before exercising any investment discretion.

Standard Investment Criteria

Section 4 of the Trustee Act 2000 requires trustees, in exercising investment powers, to have regard to the "standard investment criteria." These are:

1. The suitability of the investment — both the suitability of the type of investment to trusts generally, and the suitability of the particular investment to the trust.

2. The need for diversification — in so far as is appropriate to the circumstances of the trust.

These criteria are deceptively simple. In practice, they require trustees to think carefully about:

• The nature and purpose of the trust (income-producing vs growth-oriented; fixed-term vs perpetual).
• The interests of different classes of beneficiary (income beneficiaries who need yield vs remainder beneficiaries who want capital growth).
• The trust's liquidity requirements (e.g. a trust that will need to meet a tax liability at a fixed date cannot be fully invested in illiquid alternatives).
• Concentration risk — holding more than 10–15% in a single issuer or sector is generally difficult to justify unless the trust deed permits it or specific circumstances warrant it.
• The overall risk profile appropriate to the trust's objectives and beneficiaries.

A trust investing heavily in a single company, a single sector, or a single geography may satisfy the general power of investment but still breach the standard investment criteria. Courts have held that the failure to diversify can itself constitute a breach of trust.

The Duty to Obtain and Consider Advice

Section 5 requires that before exercising any power of investment, trustees must obtain and consider "proper advice" unless they reasonably conclude that in all the circumstances it is unnecessary or inappropriate to do so.

"Proper advice" means advice from a person who is reasonably believed to have the ability and practical experience to give such advice. In practice this means a suitably qualified and authorised investment manager, financial adviser, or stockbroker. An internal family member who happens to work in finance may not constitute "proper advice" in a formal sense.

The exceptions (unnecessary or inappropriate) are narrow. A trustee who decides not to seek advice bears the risk of justifying that decision if challenged. For most private trusts managing assets of any significance, obtaining written advice from an authorised firm is both legally correct and practically protective.

Crucially, the duty is to obtain and consider the advice — not necessarily to follow it. Trustees who receive advice recommending a particular asset allocation but depart from it without sound reasons are exposed to challenge.

Delegation of Investment Management

One of the most practically significant provisions of the Trustee Act 2000 is section 11, which allows trustees to delegate their investment functions to an authorised agent. This enables trustees to appoint a discretionary investment manager (DIM) to manage the portfolio day-to-day, subject to the investment policy statement.

To delegate lawfully, trustees must:

1. Enter into a written agreement with the agent (section 15 requirements).
2. Provide the agent with a written statement of investment policy (the "policy statement") setting out how the investment functions should be exercised.
3. Keep the arrangements under review and consider whether to revoke or vary the delegation.

The requirement for a written policy statement is important. Trustees who hand money to a discretionary manager without specifying their investment parameters — risk profile, asset allocation, ethical constraints, liquidity needs, performance benchmarks — are not fulfilling their delegatory obligations properly.

Even after delegation, trustees retain oversight responsibility. They must review the manager's performance, ensure the policy statement remains appropriate, and act if it becomes clear that the manager is not exercising the delegated functions satisfactorily.

Investment Policy Statement for Trusts

The investment policy statement (IPS) is the central governance document for any trust's investment programme. A well-drafted IPS should address:

• Investment objectives — total return, income focus, or a combination; reference benchmarks.
• Risk parameters — maximum drawdown tolerance, volatility targets, concentration limits.
• Asset allocation — strategic ranges for each asset class (equities, bonds, alternatives, cash, property).
• Permitted and prohibited investments — for example, excluding direct holdings in unlisted securities, or excluding specific sectors for ethical reasons.
• Currency policy — whether to hedge non-sterling exposure and to what extent.
• Liquidity requirements — minimum cash or near-cash holdings.
• Income vs capital — how the balance between income and capital growth reflects the interests of different beneficiary classes.
• Review process — how often the IPS will be reviewed (typically annually), and what events trigger an interim review.
• Reporting requirements — what information the manager must provide to trustees and with what frequency.

An IPS is not a static document. It should be revisited whenever the trust's circumstances change materially — for example, when a significant beneficiary event occurs, when the trust approaches its termination date, or when market conditions make the original parameters obsolete.

Balancing Beneficiary Interests: Income vs Capital

Many trusts have both income beneficiaries (who receive the annual income of the trust) and remainder beneficiaries (who receive the capital on termination). Trustees must invest in a way that is fair between these two classes.

An investment strategy that maximises income (e.g. high-yield bonds, income equities) may erode real capital value over time, disadvantaging remainder beneficiaries. Conversely, a pure growth strategy may fail to generate adequate income for life tenants.

The Nestlé v National Westminster Bank case and subsequent authorities have established that trustees must act impartially between beneficiaries and cannot sacrifice one class's interests for the benefit of another without express authority in the trust deed. In practice this usually means investing for total return and apportioning gains equitably, or obtaining explicit authorisation from all beneficiaries.

Where there is tension between beneficiary classes, trustees should document their reasoning carefully and take legal advice if the trust deed is ambiguous.

Reviewing Investments

Section 4(2) of the Trustee Act 2000 requires trustees to review the investments from time to time and consider whether they should be varied, having regard to the standard investment criteria. The frequency of review is not prescribed but should be proportionate to the value and complexity of the trust's portfolio.

For a trust investing through a delegated discretionary manager, quarterly or semi-annual review meetings are common. At each review trustees should:

• Consider the manager's performance against agreed benchmarks.
• Assess whether the investment policy statement remains appropriate.
• Review any significant changes in the trust's circumstances or beneficiaries' needs.
• Document their conclusions and any actions taken.

Trustees who fail to review investments risk being found to have breached the standard investment criteria, particularly if the portfolio has drifted into concentration risk or if market conditions have rendered the original strategy unsuitable.

Breach of Trust Risk

Trustees who fail to comply with the investment duties imposed by the Trustee Act 2000 may be personally liable to beneficiaries for any resulting loss. The measure of loss in investment breach of trust cases is typically the difference between what the trust has and what it would have had but for the breach — a potentially very large sum in cases of serious mismanagement.

Common scenarios giving rise to breach of trust risk in investment contexts include:

• Failure to diversify, resulting in concentrated losses (e.g. holding a large position in a single stock).
• Failure to take advice before making significant investment decisions.
• Failing to provide (or review) an investment policy statement before delegating to a manager.
• Investing in assets unsuitable for trusts (e.g. highly speculative or illiquid assets without appropriate authority).
• Allowing a conflicted trustee to dominate investment decisions.

Trustees have a statutory defence under section 61 of the Trustee Act 1925 if they acted honestly and reasonably, but this is not easily established where basic procedural duties have been ignored. Professional trustee indemnity insurance, careful documentation, and regular independent review of the investment programme are the most practical risk-management tools.

Practical Steps for Trustees

Trustees wishing to fulfil their investment duties should, as a minimum:

1. Read the trust deed and confirm what investment powers and restrictions apply.
2. Prepare or commission an investment policy statement appropriate to the trust.
3. Obtain proper written advice from an FCA-authorised investment firm before making investment decisions or delegating.
4. If delegating to a discretionary manager, enter a written agreement providing them with the IPS, and establish a review timetable.
5. Hold regular trustee meetings to review investments, document proceedings, and record decisions and reasoning.
6. Seek legal advice when beneficiary interests conflict or when the trust deed is ambiguous.

How Global Investments Can Help

Global Investments provides discretionary and advisory investment management services to trusts, executors, and fiduciaries. We work alongside solicitors and accountants to help trustees fulfil their statutory obligations, from drafting investment policy statements to providing regular performance reporting suitable for trustee review meetings. We also advise on balancing the competing interests of income and capital beneficiaries in a total return framework. Contact us to discuss how we can support your trustee responsibilities.

This guide is for information purposes only and does not constitute legal, tax, or investment advice. Trustee investment duties are complex and fact-specific. Readers should obtain independent professional legal and investment advice before making investment decisions as trustees. Rules and case law are as at June 2026 and are subject to change.