Practical evaluation guide

What is SROI? Calculation, use and cautions for social return on investment

An explanation of SROI, its formula, monetary valuation of benefits, stakeholders, deadweight, attribution and cautions.

Understand the SROI ratio through its formula

Main takeaway

SROI converts social outcomes into monetary values to show how much social value is generated relative to inputs. It divides the present value of social value by investment, but transparent valuation assumptions are important. [1]

SROI is used to explain the value of social and grant-funded programs. Showing how many yen of social value were generated per 1 yen invested makes it a strong method for explaining value to funders and stakeholders.

However, SROI numbers can easily be taken out of context. Carefully state which changes count as outcomes, which proxies monetize them and which share is regarded as the program's contribution.

Check the SROI calculation and its assumptions

Check the meaning of the formula, then organize the calculation, limitations, and conditions to disclose.

The basic SROI formula

Calculate the SROI ratio by dividing adjusted, discounted social value by inputs. For example, a present value of 3 million yen after all adjustments and inputs of 1 million yen give 3:1. Distinguish this from a ratio using unadjusted value.

This number is not simply revenue or profit. It monetizes participant changes, cost savings, quality-of-life improvements and other outcomes using proxies.

SROI = present value of social value ÷ investment
Organize outcomes by stakeholder
Show the basis for monetary valuation
Adjust for deadweight and attribution
Use sensitivity analysis to examine assumptions

[1]

Calculation process

Identify stakeholders and changes for each, choose indicators, assign financial proxies and deduct change expected without the program and others' contributions.

Interviews and case records matter alongside quantitative data. Restricting analysis to what can be monetized can overlook the program's fundamental value.

Identify stakeholders
Organize outcomes and the story of change
Decide indicators and sources
Set financial proxies
Check change that would occur anyway, others' contributions, displacement and drop-off over time
State the duration of effects and discount rate, and convert future value to present value
Report the SROI ratio and sensitivity analysis

[1]

Cautions for SROI

SROI can produce persuasive numbers, but values vary substantially with assumptions. Present outcome content, evidence, limitations and sensitivity analysis alongside the ratio rather than emphasizing it alone.

Forcing hard-to-monetize values into numbers can undermine credibility. Combining them with qualitative descriptions is important in practice.

Practical framework or suggestion

Disclosures that support confidence in the numbers

Specify included and excluded outcomes and sources of financial proxies, as well as the final ratio. Transparent calculations help readers judge the numbers' validity.

Examine deadweight, change that would occur without the program; attribution, others' contributions; displacement, reduced outcomes elsewhere; and drop-off, declining effects over time, with reasons for applying each. Explain each adjustment to avoid double deductions.

The 2026 SVI standards distinguish SROI reports including monetary valuation and ratios, broader social impact reports, and regular organization-wide social value reporting. Ratio disclosure is optional in the accounting notes of the organizational Reporting Standard. This guide explains SROI involving ratio calculation; it does not mean ratios are mandatory for all social value reports.

Show indicators and sources for each outcome
Show the basis of financial proxies
State excluded outcomes and reasons
Use sensitivity analysis to show effects of changing assumptions

[1] [2]

Fictional example; not actual results

Calculate a ratio with visible adjustments and assumptions

A fictional example for illustration: a calculation exercise using a fictional 1-year program. Financial proxies and adjustment rates are not recommended real-world values.

Calculation component	Illustrative setting	Result
Value before adjustment	20 cases × 100,000 yen	2 million yen
Change occurring anyway and others' contributions	Deduct 20% and 25% sequentially; assume no displacement	2 million yen × 0.8 × 0.75 = 1.2 million yen
Discounting	All value is in the current period; no future value	Present value: 1.2 million yen
Ratio	Inputs: 1 million yen	120÷100＝1.2：1
Sensitivity analysis	Change only the proxy from 100,000 to 80,000 yen	96÷100＝0.96：1

What this example supports

Do not emphasize the 1.2 result alone: changing the proxy assumption alone takes the ratio below 1. Also report significant unmonetized changes and insufficient evidence for the no-displacement assumption.

Common errors in judgment

Select only monetizable outcomes to show a high ratio

How to revise: Identify important changes first and record exclusions and reasons

Reason: This avoids overvaluation through selective inclusion of value.

Rank organizations directly by their SROI ratios

How to revise: Check comparability of target groups, periods, proxies and adjustments

Reason: The same ratio label can conceal different scopes and assumptions.

Put it into practice next

Use the SROI worksheet to check proxy evidence and adjustment rates for each outcome

View an example and open the worksheet Read the method explanation

Frequently asked questions

Does a high SROI mean a good program?

Not necessarily. Values change with assumptions and valuation methods, so examine outcome quality, evidence and limitations as well as ratios.

Can small nonprofits use SROI?

Consider whether the burden is justified by the purpose. If only outcomes are organized or partly monetized, state that scope and do not report the result as a ratio based on the complete SROI procedure.

How does SROI differ from cost-benefit analysis?

Both monetize value, but SROI particularly emphasizes stakeholder changes and explanations of social value.

References and checked sections

A guide to Social Return on Investment
The SROI Network / Social Value International · 2012
Section consulted
Stage 4 Establishing impact / Stage 5 Calculating the SROI / Resources 1 (reporting items)
How it relates to the text
Monetary valuation of change, adjustment for other factors, ratios and sensitivity analysis
Source checked: 2026-09-13 (includes AI cross-checking)
Standards for Applying the Principles of Social Value: The Complete Set
Social Value International · 2026
Section consulted
Section Three, p.30 (report types) / Part B, p.33, item 8 (optional ratio disclosure)
How it relates to the text
Distinguishing disclosure scope in SROI reporting and organizational social value reporting
Source checked: 2026-10-07 (includes AI cross-checking)

Content updated: 2026-10-07Source checked: 2026-09-13 (includes AI cross-checking)No documented human reviewIncludes fictional examplesEditorial policy and scope of checking Cite this page Report a correction

How to cite this page

EvalCompass Editorial Team. “What is SROI? Calculation, use and cautions for social return on investment”. EvalCompass, updated 2026-10-07. https://evalcompass.jun-nakatani.com/en/guides/sroi/

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Change history

2026-10-07 — A cross-guide review clarified indicator formats, outcome classifications and causal judgments, interpretation of tables, and the scope of SVI2026 where relevant.
2026-09-13 — Added correspondence between claims and original sources, fictional completed examples, judgment corrections and links to next tasks. Revised unverified generalizations.