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INTERMEDIATE 35 min read

Impact Due Diligence

A comprehensive framework for evaluating impact claims, verifying data, and assessing the credibility of investment theses.

TABLE OF CONTENTS

1. Why Impact Due Diligence Matters 2. The Due Diligence Framework 3. Evaluating Theory of Change 4. Impact Metrics & Data 5. Red Flags to Watch For 6. Complete Checklist

1. Why Impact Due Diligence Matters

Impact due diligence is the process of evaluating whether an investment will actually deliver the social or environmental outcomes it claims. It's essential for two reasons:

  1. Avoiding "Impact Washing": Some investments are marketed as impactful without rigorous evidence. Due diligence helps separate genuine impact from marketing claims.
  2. Maximizing Impact: Understanding how impact is created allows you to identify investments with the greatest potential for positive change.

"The difference between impact investing and traditional ESG is intentionality and measurement. Due diligence must verify both."

Unlike traditional financial due diligence, which focuses on revenue projections and market opportunity, impact due diligence examines the causal relationship between an investment and its intended social or environmental outcomes.

2. The Impact Due Diligence Framework

A comprehensive impact due diligence process examines five key dimensions, aligned with the Impact Management Project (IMP) framework:

🎯
WHAT
Outcomes targeted
👥
WHO
Stakeholders affected
📊
HOW MUCH
Scale & depth
CONTRIBUTION
Additionality
⚠️
RISK
Likelihood of impact

Dimension 1: WHAT Outcomes?

What social or environmental outcomes is the investment targeting? Are these outcomes important, evidence-based, and aligned with recognized frameworks like the SDGs?

Dimension 2: WHO Benefits?

Who are the stakeholders experiencing the outcomes? Are they underserved populations or geographies? How vulnerable or marginalized are they?

Dimension 3: HOW MUCH Impact?

What is the scale (how many people), depth (degree of change), and duration (how long) of the impact? Is the change meaningful?

Dimension 4: What is the CONTRIBUTION?

Would this impact happen anyway without this investment (additionality)? Is the investor enabling impact that wouldn't otherwise occur?

Dimension 5: What is the RISK?

What is the likelihood that the expected impact will be achieved? What could prevent impact from materializing?

3. Evaluating Theory of Change

A Theory of Change (ToC) is the logical framework that explains how an investment's activities lead to intended outcomes. A credible ToC should include:

💰
INPUTS
Capital, resources
⚙️
ACTIVITIES
What company does
📦
OUTPUTS
Direct products
📈
OUTCOMES
Changes for people
🌍
IMPACT
Long-term change

Questions to Ask About Theory of Change:

4. Impact Metrics & Data Quality

Credible impact claims require robust data. Here's how to evaluate impact metrics:

Metric Quality Criteria

✓ STRONG INDICATORS

  • Third-party impact audits or verification
  • IRIS+ aligned metrics with historical data
  • Clear methodology documentation
  • Outcome metrics (not just outputs)
  • Disaggregated data by demographic/geography

⚠ WARNING SIGNS

  • Only output metrics (units sold) without outcome data
  • No baseline or comparison data
  • Self-reported data without verification
  • Vague claims without quantification
  • Cherry-picked success stories

5. Red Flags to Watch For

Years of impact investing experience have revealed common warning signs of weak or misleading impact claims:

Impact Washing Indicators

Measurement Red Flags

6. Impact Due Diligence Checklist

Use this checklist to systematically evaluate impact investments:

Intent & Alignment

Impact is core to business model — Not a side benefit or marketing angle
Clear SDG alignment — Specific goals identified with logical connection
Founder/team commitment — Leadership genuinely motivated by impact mission

Theory of Change

Documented ToC exists — Clear inputs → activities → outputs → outcomes → impact chain
Assumptions identified — Key assumptions are stated and reasonable
Evidence base — Research or pilot data supports causal claims

Measurement & Data

Outcome metrics defined — Beyond outputs to actual changes for stakeholders
IRIS+ alignment — Metrics comparable to industry standards
Baseline data exists — Starting point to measure change against
Third-party verification — Independent validation of impact claims

Stakeholder Consideration

Beneficiaries identified — Clear understanding of who benefits and how
Stakeholder input — Evidence of engaging beneficiaries in design/feedback
Negative impacts considered — Potential harms identified and mitigated

Additionality & Risk

Counterfactual considered — What would happen without this investment?
Impact risks identified — Factors that could prevent impact from materializing
Exit considerations — How will impact be sustained after investor exit?

Download the Full Checklist

Get a printable PDF version of the Impact Due Diligence Checklist.

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