How is cost per outcome calculated and interpreted?

How cost per impact is calculated

Cost per impact is the total cost of running your program divided by the number of outcomes that program achieved:

Total program cost (USD) ÷ number of outcomes achieved = cost per impact

For example, if a workforce program costs $100,000 to run over the year and helps 100 people secure jobs, the cost per impact is $1,000 per job ($100,000 ÷ 100).

As a nonprofit, the figure you're reporting is your program’s total cost per impact — the full cost to deliver the program during your report period measured against all the outcomes that program produced. This is different from the donor cost per impact a funder sees, which divides only their investment by the share of outcomes they can claim. Your job is to report the complete, program-level picture accurately.

Why in-kind donations are included in the cost

The "total cost" in the calculation isn't just the cash you spent. It includes in-kind contributions — volunteer hours, donated goods, and pro bono professional services — monetized at their fair value.

They're included because they are real resources your program consumed to produce its outcomes. A program staffed largely by volunteers or running on donated space and supplies still requires those resources to work; they simply arrived as time and goods instead of cash. If you leave them out, your reported cost is artificially low, which makes your cost per impact look smaller than it truly is and makes it impossible to compare fairly against programs that pay for the same resources in cash. Counting in-kind contributions ensures an accurate accounting of costs, enables apples-to-apples comparisons, and reflects the full value it takes to generate each outcome.

How cost per impact is used

Cost per impact is a standardized metric, which is what makes it useful in several places:

Internally, it lets you track a program's efficiency over time and compare it against peer programs pursuing the same outcome or serving the same population — a common basis of comparison rather than raw budget size.

With donors, it translates your results into a figure funders immediately understand ("every $1,000 helped one person find work"), which strengthens both reporting and fundraising conversations.

Through reporting partners like Charity Navigator, the cost per impact you report flows into the impact and effectiveness measures those platforms use to evaluate and showcase your organization. Because that number travels beyond your own reporting, accuracy and completeness matter.

How to ensure the most accurate cost per impact

A few practices keep this number defensible:

Build a program-focused report. Scope the report to a single program rather than your whole organization, so the costs and the outcomes you're dividing actually belong to the same set of activities. Blending multiple programs, or mixing program and org-wide numbers, distorts the ratio.

Use a budget that captures the total cost to run the program. Include direct costs, a fair allocation of shared or indirect costs (overhead, administration), and all in-kind contributions. An incomplete budget is the most common reason a cost per impact comes out misleading.

Match the time period. Make sure the costs and the outcomes cover the same reporting period, so you aren't dividing a year of outcomes by a partial-year budget or vice versa.

Count outcomes consistently and avoid double counting. Use clear, consistent outcome definitions, and only count outcomes the program actually produced. The numerator (cost) and denominator (outcomes) should describe the same program and period.

Contextualize the result. A low cost per impact is not automatically "better." Depth of outcome, the population served, and the difficulty of the work all matter. Report the number alongside the important context a reader needs to interpret it fairly.