Served, Helped, or Changed? Outputs, Outcomes, and Impact
In a hurry? Skip straight to the numbers.
Open the Cost Per Beneficiary Calculator →“We served a thousand people” sounds impressive, but it answers only the shallowest question about a program. The distinction between outputs, outcomes, and impact — between activity, results, and lasting change — is fundamental to understanding what a grant achieves, and it exposes the limits of any single per-person cost figure.
Three Different Questions
Program evaluation separates three levels. Outputs count activity: how many were served, sessions held, meals given. Outcomes measure results: did participants gain skills, find jobs, improve health? Impact asks about lasting, attributable change: did the program make a durable difference that would not have happened anyway? Each level is harder to measure and closer to what truly matters.
The Logic Model
To connect these levels, evaluators use a logic model — a map linking resources to activities, activities to outputs, outputs to outcomes, and outcomes to impact. It forces a program to articulate not just what it does but why that should lead to change. The logic model is the backbone of serious program design, making the chain from spending to difference explicit.
| Level | Question |
|---|---|
| Output | How much did we do? |
| Outcome | What changed for people? |
| Impact | What lasting difference resulted? |
Why Cost Per Beneficiary Is Blunt
Cost per beneficiary divides spending by people served — an output measure. It is easy to compute and compare, which is why funders request it, but it says nothing about whether those people were actually helped. A program can serve many cheaply while changing few, and this metric would flatter it. The number is a starting point, not a verdict on effectiveness.
Goodhart's Law
A deeper warning haunts all such metrics: when a measure becomes a target, it ceases to be a good measure. If programs are rewarded for low cost per beneficiary, they may chase headcount over genuine help, gaming the number. This is Goodhart's law, and it is why wise funders pair simple metrics with judgment about the outcomes and impact behind them.
Calculating Cost Per Beneficiary
To compute cost per person served, use the Cost Per Beneficiary Calculator. Move to results with the Cost Per Outcome Calculator, and to value with the Grant ROI Calculator.
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