The Institution of Structural Engineers

Analysis

The Institution of Structural Engineers is a registered charity in England and Wales, based in London. It was registered in March 1964, 62 years ago. Its declared purposes cover education/training, environment/conservation/heritage and economic/community development/employment, which this site groups under environment and conservation. It says it makes grants to individuals, makes grants to organisations and provides advocacy/advice/information.

In the financial year ending December 2025, The Institution of Structural Engineers reported income of £9.3m and spending of £9.4m, spending 102% of its income. Across the 5 years on record, from December 2021 to December 2025, income grew from £8.1m to £9.3m (+14%), an average of +3.4% a year. Over the whole period it spent 96% of the income it received.

Among 4,574 England and Wales charities whose main cause is environment and conservation and that reported income, The Institution of Structural Engineers sits at the 99th percentile: it is larger than about 99% of them. 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 Lancashire Wildlife Trust (£9.2m), The Groundwork South Trust Limited (£9.4m) and The Royal Town Planning Institute (£9.2m).

In its latest detailed accounts, income came from charitable activities 63%, trading 35% and investments 2.1%. Charitable activities took 71% of spending and raising funds 26%. Reserves of £1.3m would cover about 2 months of spending at that rate. It employed 74 people.