THE BRITISH INTERPLANETARY SOCIETY

Registered charity 250556 · accounts filings on the Charity Commission register · also known as B I S, THE BRITISH INTERPLANETARY SOCIETY LIMITED

The British Interplanetary Society promotes the exploration and use of space for the benefit of humanity, by connecting people to create, educate and inspire, and advance knowledge in all aspects of astronautics.

Causes: Education/training · Arts/culture/heritage/science · website · Get email alerts

Latest income
£357k
Latest spending
£544k
Registered
1967
Accounts read
FY2025

Financial health, per its FY2025 accounts

The accounts state that the charity reported a net expenditure of £186,942 for the year ended 31 August 2025, resulting in a decrease in total funds from £3,593,141 to £3,406,199. Per the trustees' report, unrestricted reserves of £3,376,525 are considered sufficient to fund the charity's aims on a year-by-year basis. The auditor confirmed that the charity has adequate resources to continue in operational existence for the foreseeable future with no material uncertainties identified.

Automated summary of the FY2025 accounts; the evidenced findings below carry the verbatim passages.

What the accounts disclose

Related-party transaction: Trade debtor due from company owned by a trustee
Included in trade debtors is an amount due from Commercial Space Technologies Limited (CST) of £3,662 (2024: £4,662) a company owned by a trustee of the charity. — page 36
Per its FY2025 accounts as filed with the Charity Commission.

Accounts audited by TC Group. Discloses 3 of 6 completeness components.

Property (HM Land Registry)

2 registered titles in England and Wales held by the charity’s company or corporate body (2 freehold). All charity-held property. Contains HM Land Registry data © Crown copyright, OGL v3.0.

Structured financials (annual return, FY ending 30/08/2024)

Total income
£853k
Total spending
£449k
Reserves (reported)
£3.5m
Employees
3

Reported reserves equal ~94.5 months of spending — in the top quarter for charities its size (median 7.0 months; benchmarks).

Trustees · trustee networks

Trustee list from the Charity Commission register (current, not historical).

Operates in: Throughout England And Wales

Income and spending

Financial year endIncomeSpending
30/08/2025£357k£544k
30/08/2024£853k£449k
30/08/2023£423k£445k
31/08/2022£354k£363k
31/08/2021£402k£498k

Common questions

Is THE BRITISH INTERPLANETARY SOCIETY financially healthy?

Per its FY2025 accounts: The accounts state that the charity reported a net expenditure of £186,942 for the year ended 31 August 2025, resulting in a decrease in total funds from £3,593,141 to £3,406,199. Per the trustees' report, unrestricted reserves of £3,376,525 are considered sufficient to fund the charity's aims on a year-by-year basis. The auditor confirmed that the charity has adequate resources to continue in operational existence for the foreseeable future with no material uncertainties identified. Its FY2025 accounts were audited by TC Group.

Funders of similar charities

Funders whose accounts show grants to charities similar to this one (and no recorded grant to this charity) — a starting list for fundraisers.

Charities like this

Semantically similar by activities and financial character, from our analysed corpus. Compare with THE BRITISH ASTRONOMICAL ASSOCIATION.

Side by side with its peers

CharityIncomeTop pay bandStaff >£60kReserves vs policyFundraising costGoing concern
THE BRITISH INTERPLANETARY SOCIETY£357kunclearno doubt
THE BRITISH ASTRONOMICAL ASSOCIATION FY2025£143k0aboveno doubt
MANAV DHARAM SOCIETY (UK) FY2025£321k0unclearno doubt
The British Fertility Society FY2025£309k0aboveno doubt
MANSFIELD AND SUTTON ASTRONOMICAL SOCIETY CIO FY2025£2.5m0unclearno doubt
SOUTH DOWNS PLANETARIUM FY2025£118k0unclearno doubt

Each row is that charity’s latest analysed filing; every value is quote-backed on its own page.