How Charities Can Measure Their Impact: A Practical Guide

Funders, commissioners and trustees increasingly ask charities, CICs and VCSE organisations the same question: what difference does your service make? Counting how many people you saw is a start, but it does not show whether their lives improved.

To measure impact, decide what change you expect, choose a small number of measures that show it, record them as part of normal support, and review the results regularly. The steps below show how.

1. Outputs, outcomes and impact are not the same

Outputs are what you deliver: sessions held, referrals accepted, people supported.
Outcomes are the changes people experience: improved wellbeing, greater confidence, stable housing.
Impact is the longer-term difference your work contributes to, often alongside other services.

Most funder reports need both outputs and outcomes. Keeping the three separate makes your reporting clearer and more honest.

2. Start with a simple theory of change

A theory of change sets out who you support, what you do, what you expect to change and why. It does not need to be a long document—one page agreed with staff, and ideally with people who use your service, is often enough.

Write it in plain language: “Young people referred to our service receive weekly one-to-one support so that they feel less anxious and more able to attend school.” Every measure you choose should connect back to a sentence like this.

3. Choose a few meaningful measures

Fewer, better measures beat a long list nobody completes. For each outcome, pick one or two ways to evidence it:

Validated questionnaires, used at the start, during and at the end of support, give a recognised and comparable view of change.
Goal-based measures let people set and score their own goals, which keeps the focus personal.
Service data such as waiting times, attendance and completed support shows how well the service runs.
Stories and feedback explain the numbers and show what change looks like for a real person, with their consent.

Check what your funders and commissioners already expect, so you collect information once rather than in several formats.

4. Collect data as part of everyday support

Impact data is most reliable when it is captured during normal work, not reconstructed at the end of the quarter. Agree when each measure is completed—for example at the first session, every six sessions and at closure—and who is responsible.

Keep it easy for frontline staff. If recording outcomes means switching between spreadsheets and paper forms, completion rates fall and the picture becomes patchy. Read more in our article on why data quality matters.

5. Look at the results, then act on them

Review outcomes regularly with managers and frontline teams, not just before a report is due. Ask simple questions:

Are people completing support, and how long are they waiting?
Which groups see the most and least change?
Where are measures missing, and why?
What would we change in the service as a result?

Measurement is most valuable when it improves the service, not only when it satisfies a funder.

6. Report clearly and honestly

A strong impact report combines a few headline numbers, the change people experienced, a short story or quote, and what you learned. Be clear about how many people completed each measure, and avoid claiming results your service cannot fully take credit for.

The charity think tank NPC publishes further guidance on impact practice for the sector.

A quick checklist

A one-page theory of change agreed with your team.
One or two measures for each outcome, aligned with funder requirements.
Agreed points in the support journey to record them.
Regular reviews that lead to service changes.
Reports that show numbers, stories and learning.

Where MYMUP fits

MYMUP brings client records, referrals and outcomes reporting together, so validated assessments and service activity are recorded as part of everyday support and can be reported through dashboards. Explore MYMUP for charities, CICs and VCSE organisations, or read how to choose case management software.