Social Impact Measurement
Social impact measurement tracks what actually changed for the people or environment a programme set out to affect, rather than counting the activity delivered.
A left-to-right chain runs from the outcome you're claiming through to the honest report, with the baseline fixed before any data collection starts.
Reach for this when…
- A funder or board is asking for evidence, not just a list of activities.
- You suspect a programme feels busy but isn't actually changing outcomes.
- You're choosing between two programmes and need more than gut feel.
How to run it
- Define the outcome you're claiming, not the output you're delivering.
- Pick indicators you can actually collect data on, repeatedly.
- Establish a baseline before you start measuring change.
- Collect data on a rhythm you can sustain, not a one-off survey.
- Report the outcome honestly, including where the evidence is thin.
A worked example
Situation. Camila Restrepo runs Fundación Vida Sana, a community health NGO in Medellín, Colombia, that had been reporting 'workshops delivered' to funders for three years without ever tracking whether attendees changed behaviour.
Applied. She picked one outcome, a reduction in untreated childhood diarrhoea in the comunas served, set a baseline from local clinic records, and tracked it every quarter instead of counting attendance.
Result. Two of the five comunas showed no measurable change despite good attendance, which redirected the programme's next grant toward the actual barrier: distance to the nearest clean water point, not more workshops.
The catch
The hardest part is attribution - proving your programme caused the change rather than something else in the community. Good measurement is also slow and resource-intensive, and small NGOs often can't sustain it past the first grant cycle. Chosen indicators tend to measure what's easy to count, not necessarily what matters most.
If you can't name the counterfactual, what would have happened anyway, your impact number is really just an activity count with a nicer label.