St Mary's School (calne)
The provision of boarding and day education for girls aged 11-18 at St Mary's School, Calne and day education for boys and girls at St Margaret's Preparatory School, Calne. In so doing, providing high quality education to students whose families do not otherwise have the financial means to fund independent education.
Activities & Mission
The provision of boarding and day education for girls aged 11-18 at St Mary's School, Calne and day education for boys and girls at St Margaret's Preparatory School, Calne. In so doing, providing high quality education to students whose families do not otherwise have the financial means to fund independent education.
Areas of Operation
Where this charity is registered to operate, as self-declared to the Charity Commission. These are regulatory classifications, not a list of active programmes, and don't necessarily indicate fundraising activity in each location.
Local Authority
Financial Information
Financial Efficiency
Higher than 45% of UK Beneficiary group charities with income over £10M (sample: 685). How is this calculated?
Higher than 33% of UK Beneficiary group charities with income over £10M. How is this calculated?
Lower overhead than 28% of UK Beneficiary group charities with income over £10M. (Lower overhead is generally read as more efficient.) How is this calculated?
Latest Financial Breakdown
Income Sources
Expenditure Categories
Financial Trend
Annual Returns
As filed with the Charity Commission for England and Wales. Most recent filing covers the financial year ending 2025.
| Financial Year | Income | Expenditure | Charitable Spending | Net Assets | Reserves | Staff |
|---|---|---|---|---|---|---|
| 2025 | £18,492,478 | £18,103,136 | £17,129,780 | £27,148,121 | £16,486,955 | 444 / 0 |
| 2024 | £18,724,699 | £17,884,410 | £16,803,124 | £26,789,964 | £15,970,376 | 415 / 0 |
| 2023 | £17,114,673 | £17,510,678 | £16,432,869 | £25,772,649 | £15,251,546 | 434 / 0 |
| 2022 | £16,604,477 | £16,308,824 | £15,298,682 | £26,167,153 | £16,111,928 | 267 / 0 |
| 2021 | £15,945,613 | £15,451,894 | £14,663,473 | £25,972,161 | £15,979,058 | 267 / 0 |
Staff column shows: Employees / Volunteers
Frequently asked questions about St Mary's School (calne)
What does St Mary's School (calne) do?
The provision of boarding and day education for girls aged 11-18 at St Mary's School, Calne and day education for boys and girls at St Margaret's Preparatory School, Calne. In so doing, providing high quality education to students whose families do not otherwise have the financial means to fund independent education.
How much income did St Mary's School (calne) report in 2025?
St Mary's School (calne) reported total income of £18.49m and reported expenditure of £18.10m for the financial year ending 2025, based on the most recent annual return filed with the Charity Commission.
How efficient is St Mary's School (calne)?
St Mary's School (calne) has a program ratio of 92.6%, meaning that share of its income goes directly to charitable activities. This is higher than 45% of UK Beneficiary group charities with income over £10M (sample of 685 charities). See our methodology for how this is calculated.
When was St Mary's School (calne) registered as a charity?
St Mary's School (calne) was registered with the Charity Commission for England and Wales on 23 May 1963 as charity number 309482. It has been registered for 63 years.
Who runs St Mary's School (calne)?
St Mary's School (calne) is governed by a board of 10 trustees. The chair of trustees is Svante Lennart Stensson Adde. Trustees are legally responsible for the charity's governance and are listed in full on its profile.
Where does St Mary's School (calne) operate?
St Mary's School (calne) operates in Wiltshire, as recorded in its Charity Commission filing.
Is St Mary's School (calne) a registered charity?
Yes — St Mary's School (calne) is a registered charity in England and Wales, charity number 309482.
Details
63 CURZON STREET
CALNE
SN11 0DF
Registry Information
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Major UK charities in the same primary sector, drawn from the curated priority cohort.
Trustees
Sectors & Classifications
Data & trust
- Register data refreshed
- 14 May 2026
- Methodology
- How metrics are calculated