Charitable Incorporated Organisations (CIOs): A Complete Guide for UK Charities

Published by Legal Foundations. Last reviewed: March 2026.

A charitable incorporated organisation (CIO) is the legal structure specifically designed for charities in England and Wales. It combines the limited liability of a company with the Charity Commission’s regulatory framework — without requiring registration at Companies House. Since its introduction under the Charities Act 2006 (now consolidated in the Charities Act 2011), the CIO has become the default choice for most new charities and for existing unincorporated charities seeking formal legal status.

This guide covers everything trustees, founders, and advisers need to know: what a CIO is, when to choose it, how to register, what the constitution must contain, the duties it imposes on trustees, and how to wind one up.

What Is a Charitable Incorporated Organisation?

A CIO is a legal entity created by and regulated by the Charity Commission for England and Wales. It is an incorporated body — meaning it can enter contracts, hold property, employ staff, and sue and be sued in its own name, separate from the individuals running it.

This separateness is the core advantage over an unincorporated charity. An unincorporated association or charitable trust has no legal personality distinct from its members or trustees. When an unincorporated charity enters a contract, the trustees sign personally and bear personal liability if things go wrong. A CIO eliminates that exposure.

The CIO’s enabling legislation is Part 11 of the Charities Act 2011 and the Charitable Incorporated Organisations (General) Regulations 2012 (SI 2012/3012), as amended.

CIO vs Other Legal Structures: How to Choose

CIO vs Unincorporated Association

An unincorporated charitable association is simple to set up — it requires no registration beyond the Charity Commission if its income exceeds £5,000 — but its members and committee officers carry personal liability for the association’s debts. They cannot hold property in the organisation’s name; it must be held by trustees personally or through a custodian trustee. This creates practical complications when membership changes.

A CIO removes these problems. It is the natural upgrade path for an unincorporated association that is growing, taking on staff, or entering significant contracts.

CIO vs Charitable Company (Company Limited by Guarantee)

Before the CIO was introduced, charities wanting incorporation had to register as companies limited by guarantee (CLGs) and register separately with both Companies House and the Charity Commission. This created dual regulatory burden — annual accounts and confirmation statements to Companies House alongside Charity Commission annual returns.

A CIO registers only with the Charity Commission. There is no Companies House filing. This is a significant administrative saving, particularly for smaller charities without professional staff.

However, there are differences worth noting:

Feature CIO Charitable CLG
Registration Charity Commission only Companies House + Charity Commission
Annual filing Charity Commission Both regulators
Legal framework Charities Act 2011 Companies Act 2006 + Charities Act
Contractual capacity Full Full
Limited liability Yes Yes
Members distinct from trustees? Depends on type Yes, typically
Access to company voluntary arrangement No Yes
Recognition internationally Less familiar Widely understood

For charities seeking to operate internationally or raise debt finance, a CLG may be preferable because lenders, overseas counterparties, and grant-givers are more familiar with company structures and can verify the entity at Companies House. For most domestic charities, the CIO’s simpler administration is the decisive factor.

Charitable Incorporated Organisations (CIOs)

CIO vs Charitable Trust

A charitable trust has no legal personality and no members — only trustees. It is appropriate where there is no membership base and the founders want minimal governance requirements. It cannot enter contracts or hold property directly. For grant-making charities distributing endowed funds, a trust structure may suffice. For anything operational — running services, employing staff, leasing premises — a CIO or CLG is more appropriate.

CIO vs Community Interest Company (CIC)

A CIC is not a charity. It is a company structure for social enterprises that must satisfy a community interest test but can distribute dividends (subject to a cap). CICs cannot register as charities and do not receive charitable tax reliefs (Gift Aid, business rates relief, inheritance tax exemption). A CIO is appropriate where charitable status and its associated tax benefits are desired; a CIC is appropriate where the organisation wants to trade commercially and share profits, while demonstrating social purpose.

The Two Types of CIO

Foundation CIO

In a foundation CIO, the members and the trustees are the same people. There is no separate membership body. This is suitable for smaller organisations where the trustees are the only stakeholders, or where there is no meaningful external membership — for example, a small grant-making foundation or a family charity.

Association CIO

In an association CIO, there is a separate membership body that is distinct from the board of trustees. Members elect trustees, can vote on constitutional amendments, and have a formal role in the governance of the charity. This mirrors the structure of an unincorporated membership association and is the appropriate form for charities with a meaningful external membership — sports clubs, community organisations, professional associations, faith groups.

The choice between foundation and association CIO is constitutional and cannot easily be changed after registration. Founders should think carefully about whether a membership base is desirable — membership brings democratic legitimacy but also governance complexity.

Registration with the Charity Commission

Eligibility

To register as a CIO, the organisation must:

  1. Have exclusively charitable purposes (as defined in s.3 Charities Act 2011 — education, religion, relief of poverty, arts, environment, sport, and so on)
  2. Operate for the public benefit (s.4 Charities Act 2011)
  3. Have an annual income that justifies registration — the current threshold for mandatory registration is income exceeding £5,000 per year

There is no minimum capital requirement for a CIO, unlike some company structures.

The Registration Process

  1. Draft the constitution. The Charity Commission publishes model constitutions for both foundation and association CIOs. These are strongly recommended as a starting point and must be used unless the applicant has good reason to deviate.
  2. Appoint initial trustees. A CIO must have at least three trustees. Trustees must be over 16, must not be disqualified under s.178 Charities Act 2011 (bankruptcy, unspent convictions for dishonesty, being on the sex offenders register), and should be independent where possible.
  3. Submit the application online. Registration is made via the Charity Commission’s online portal. The application requires the draft constitution, details of all trustees, a description of the charity’s purposes and activities, financial projections, and a statement of public benefit.
  4. Commission review. The Commission will review the application and may request amendments to the constitution or further information. Processing times vary — in 2024, the Commission was taking 4–8 weeks for straightforward applications.
  5. Registered charity number issued. On approval, the CIO receives a registered charity number. It can then begin operating, opening bank accounts, entering contracts, and fundraising publicly.

Constitutional Requirements

The CIO constitution must contain (per the 2012 Regulations):

  • The name of the CIO
  • Whether it is a foundation or association CIO
  • The principal office address (must be in England or Wales)
  • The charitable purposes
  • A dissolution clause specifying how assets are distributed on winding up (must go to another charity)
  • Details of membership (for association CIOs)
  • Trustee appointment, removal, and decision-making procedures
  • Conflict of interest procedures

The constitution is a public document, searchable on the Charity Commission register.

Trustee Duties and Liabilities

Trustees of a CIO owe statutory duties under the Charities Act 2011 and are also subject to the general law of fiduciary duty. Key obligations include:

  • Duty to act in the charity’s best interests (s.66 Charities Act 2011) — not in the interests of trustees personally or of funders
  • Duty of care — to exercise reasonable care and skill, taking account of any professional expertise a trustee has
  • Duty to manage conflicts of interest — trustees with a personal interest in a decision must declare it and, in most cases, withdraw from the vote
  • Duty to comply with the constitution — acting outside the CIO’s powers is ultra vires and potentially a breach of trust

Unlike company directors, CIO trustees cannot generally receive remuneration for their trustee role unless the constitution expressly permits it and Charity Commission consent is obtained. Expenses are always reimbursable.

Limited liability protection: The CIO structure protects trustees from personal liability for the CIO’s debts, provided they have not acted in breach of their duties. A trustee who causes the CIO to enter a contract knowing the CIO cannot pay, or who misapplies charity funds, loses this protection and may face personal liability and regulatory action by the Commission.

Converting an Existing Charity to a CIO

An unincorporated charitable association or charitable trust can convert to a CIO under ss.226–228 of the Charities Act 2011. The conversion process involves:

  1. Passing a resolution of members/trustees to convert
  2. Applying to the Charity Commission with the proposed CIO constitution
  3. The Commission approving the conversion
  4. Transfer of assets, contracts, and liabilities to the new CIO

Importantly, conversion from an unincorporated charity to a CIO is a true conversion — the existing charity’s registration number is retained and assets transfer automatically by operation of law, rather than requiring formal assignment of each contract and asset. This is considerably simpler than dissolving and re-incorporating.

A CLG can also convert to a CIO under s.228A Charities Act 2011 (inserted by the Charities Act 2022), though this process requires the agreement of Companies House to remove the company from the register.

Annual Reporting and Compliance

CIOs with income up to £25,000 must file an annual return with the Charity Commission. Above £25,000, annual accounts (prepared on receipts and payments basis up to £250,000 income; accruals basis above that) must be submitted. CIOs with income above £500,000 must have their accounts independently audited.

The Commission publishes all accounts and annual returns on its public register. Persistent failure to file is a ground for the Commission to take regulatory action, including removing trustees or appointing an interim manager.

Winding Up a CIO

A CIO can be wound up by:

  1. Voluntary dissolution — a resolution of trustees (or members for an association CIO), followed by application to the Charity Commission. The Commission will only approve if the CIO’s assets are distributed to another charity.
  2. Commission-initiated dissolution — if the CIO has been dormant, has no assets, or trustees have persistently failed in their duties.
  3. Insolvency — if a CIO is insolvent, the provisions of the Insolvency Act 1986 apply (as modified by the Charitable Incorporated Organisations (Insolvency and Dissolution) Regulations 2012). Trustees should seek urgent insolvency advice if the CIO cannot pay its debts — the limited liability protection will not apply if they continue trading when insolvent.

Practical Examples: When to Choose a CIO

  • New community sports club with a membership and ambitions to hire a part-time coordinator: association CIO. Membership structure is appropriate; limited liability protects volunteer committee members.
  • Small grant-making foundation funded by a family endowment with no external members: foundation CIO. Simple governance, no Companies House filing.
  • Existing village hall committee (currently unincorporated) that has recently taken on a 25-year lease: convert to foundation or association CIO immediately. Unincorporated trustees should not hold long-term property interests personally.
  • Social enterprise wanting to pay dividends: not a CIO — consider a CIC or standard limited company.
  • Organisation operating across England and Scotland: consider that OSCR (the Scottish charity regulator) has its own registration requirements. Operating in both jurisdictions may require registration with both the Charity Commission and OSCR.

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