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The Royal United Services Institute for Defence and Security Studies

RegisteredRegistered charity number 210639LondonOther charitable purposes
Income£16.6m2025-03-31
Spending£16.6msame year
Spent / received92%5-year average
Size in its cause100th pctOther charitable purposes
Registered1962Other
Employees113latest return

Analysis

The Royal United Services Institute for Defence and Security Studies is a registered charity in England and Wales, based in London. It was registered in October 1962, 64 years ago. Its declared purposes cover other charitable purposes, which this site groups under other charitable purposes. It says it provides services, sponsors or undertakes research and other charitable activities.

In the financial year ending March 2025, The Royal United Services Institute for Defence and Security Studies reported income of £16.6m and spending of £16.6m, spending 100% of its income. Across the 5 years on record, from March 2021 to March 2025, income grew from £11.1m to £16.6m (+49%), an average of +10% a year. The sharpest change came in the year to March 2022, when income rose by 38%. Over the whole period it spent 92% of the income it received.

Among 1,463 England and Wales charities whose main cause is other charitable purposes and that reported income, The Royal United Services Institute for Defence and Security Studies sits at the 100th percentile: it is one of the largest 1% in its cause. Against every charity in England and Wales with reported income it ranks in the 99th percentile. Charities of a similar size with the same main cause include The Pennies Foundation (£16.4m), Charity Assets Trust (£17.3m) and The British Psychological Society (£13.1m).

In its latest detailed accounts, income came from charitable activities 85%, donations and legacies 9.8% and trading 5.0%. Charitable activities took 93% of spending and raising funds 6.1%. Reserves of £5.0m would cover about 4 months of spending at that rate. It employed 113 people.

Income and spending

£0£4.7m£9.4m£14.0m£18.7m2021 Income: £11,130,4922021 Spending: £9,393,08320212022 Income: £15,367,6012022 Spending: £11,848,01020222023 Income: £16,800,1622023 Spending: £15,991,71620232024 Income: £18,715,9272024 Spending: £18,172,61820242025 Income: £16,616,5422025 Spending: £16,561,1982025
IncomeSpending

Where the income comes from

  • Donations 9.8%
  • Charitable activities 85%
  • Trading 5.0%
  • Investments 0.0%

In the charity's own words

RUSI is the UK's leading independent think tank on international defence and security. Its mission is to be an analytical research-led global forum for informing, influencing and enhancing public debate on a safer and more stable world.

Similar-sized charities, same cause

CharityLocationIncome
The Pennies FoundationLondon£16.4m
Charity Assets TrustLondon£17.3m
The British Psychological SocietyLeicester£13.1m
Lilian Faithfull CareGloucestershire£18.2m