How Many Trustees Does a Charity Need? UK Requirements Explained

The short answer: it depends on your charity's legal form. An unincorporated charity (trust or association) can legally operate with as few as one trustee, though the Charity Commission recommends a minimum of three. A charitable company (limited by guarantee) needs at least one director, but again, three or more is recommended. A Charitable Incorporated Organisation (CIO) needs at least one trustee for a foundation CIO, or at least one member and one trustee for an association CIO — but your constitution will usually specify a higher minimum.

Legal minimums by charity type

Legal form	Legal minimum trustees	Charity Commission recommendation
Unincorporated trust	1 (unless governing document specifies more)	At least 3
Unincorporated association	Set by constitution (often 3)	At least 3
Charitable company (CLG)	1 director (Companies Act 2006)	At least 3
CIO (foundation model)	1 (unless constitution specifies more)	At least 3
CIO (association model)	1 (unless constitution specifies more)	At least 3

Check your governing document first. Most constitutions set a minimum number of trustees that is higher than the legal minimum. If your constitution says "minimum 5 trustees," you cannot operate with fewer than 5 regardless of what the law technically allows.

Why the Charity Commission recommends at least three

The Charity Commission's guidance on trusteeship recommends a minimum of three trustees for practical governance reasons:

Decision-making: With three or more trustees, decisions can be made by majority. With two trustees, any disagreement creates a deadlock. With one trustee, there is no oversight at all.

Segregation of duties: Basic financial controls require at least two people — one to authorise payments and another to check them. A single trustee handling all finances creates fraud risk.

Continuity: If one trustee becomes ill, moves away, or resigns, a board of three still has two members who can act. A board of two is immediately inquorate if one trustee leaves.

What is the right board size for a small charity?

For most small charities with income under £500,000, a board of 5-8 trustees is practical. Here is why:

Fewer than 5 makes it difficult to distribute responsibilities (chair, treasurer, safeguarding lead) and maintain quorum if one or two trustees are absent.

More than 10 can slow decision-making, make meetings harder to schedule, and create a diffusion of responsibility where no one feels individually accountable.

The sweet spot depends on your charity's activities. A charity that runs weekly sessions with children and needs safeguarding, fundraising, finance, and programme oversight may need 7-8 trustees to cover those responsibilities. A small grant-making trust that meets twice a year may work well with 4-5.

Maximum number of trustees

Most governing documents set a maximum as well as a minimum. Typical maximums range from 10 to 15 for small charities. If your governing document does not set a maximum, consider adding one when you next review it — an uncapped board can grow unwieldy.

The Charity Commission does not set a mandatory maximum, but notes that very large boards can be less effective at governance.

What happens if you drop below the minimum?

If your charity falls below the minimum number of trustees set in your governing document:

1. Check your governing document for rules on what happens. Some constitutions allow remaining trustees to act for the purpose of appointing new trustees only.

2. Recruit new trustees promptly. The remaining trustees should focus on finding replacements before making other decisions.

3. Do not make major decisions (spending, contracts, policy changes) with an inquorate board unless your governing document specifically permits it.

4. Notify the Charity Commission if you cannot recruit enough trustees to reach quorum within a reasonable period. They can provide guidance and, in some cases, appoint trustees.

Practical tips for trustee recruitment

• Use your networks first. Ask existing trustees, beneficiaries, and local community contacts.
• Be specific about what you need. "We need a trustee with fundraising experience" attracts better candidates than "we need trustees."
• Make the role accessible. Evening or weekend meetings, clear time commitments (e.g., "4 meetings per year, 2 hours each"), and expenses reimbursement remove barriers.
• Consider skills gaps. Use a simple skills audit to identify what expertise your board is missing. Common gaps for small charities: finance, digital/IT, legal, and safeguarding.

For guidance on running an effective board, see our Charity Governance Code 2025 guide.

FAQ

How many trustees should a charity have? The Charity Commission recommends at least 3. For most small charities, 5-8 is practical — enough to distribute responsibilities and maintain quorum, without being so large that meetings become unwieldy.

Can a charity have just one trustee? Legally, some charity types can have a single trustee. But the Charity Commission strongly recommends against it — a sole trustee has no oversight, no one to share decisions with, and no continuity if they step down.

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This guide applies to charities registered in England and Wales. Scottish and Northern Irish charities have different requirements. This is general guidance, not legal advice.

Sources

• Charity trustee: what's involved — GOV.UK
• Charity Governance Code 2025