Nesta Impact Investments - Independent audit to strengthen impact discipline
Summary
Nesta Impact Investments wanted to test how well impact was embedded in its investment decisions and engagement with investees and demonstrate credibility to investors and the wider field. I co-led an independent impact audit that reviewed the full investment cycle, identified strengths and gaps, and helped strengthen the discipline with which social impact is managed alongside financial performance.
The challenge: embedding strategy in practice
When Nesta Impact Investments (NII1) launched in 2012, it was one of the first impact investment funds in the UK. From the outset, it committed to rigorous evidence, aiming to ensure that each investment delivered measurable social impact alongside financial return.
After four years of experience, the fund revised its impact strategy. The new approach placed greater emphasis on alignment between financial and impact goals and on transparency as a way of strengthening credibility both for the fund and the wider impact investment field.
Nesta commissioned an independent impact audit to assess how well this strategy was being applied in practice, to compare its approach with emerging industry standards, and to identify areas for improvement. The aim was both internal learning and external credibility.
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The process: co-leading a learning-focused audit
I co-led the audit with ITAD, focusing on how impact processes functioned in practice, including due diligence, portfolio engagement, risk assessment and reporting.
We reviewed investment documentation, impact frameworks, tools and reports. We interviewed all NII staff, members of the Investment Committee and selected investees. We observed key decision-making forums, including Investment Committee meetings, and reviewed relevant industry standards and literature.
The audit was designed as a rapid, participatory and learning-focused process. Findings were discussed with the team as the work progressed so that the report could identify both strengths and practical priorities for improvement. The final output was a published audit report setting out where impact practice was working well and where greater consistency was needed.
What changed
The audit gave Nesta Impact Investments a clearer articulation of its impact approach and how it compared with emerging industry standards. It confirmed areas of strength, including the fund’s partnership-based approach with investees and its investment in sector knowledge to inform decision-making.
Two issues stood out. First, the need to consider systemic impact and unintended consequences more consciously, both at due diligence and post-investment. Second, the need to strengthen data collection so that reporting could move beyond scale to demonstrate depth and quality of impact.
The process also reinforced the principle that social impact should be treated with the same seriousness as financial performance, with clear expectations, scrutiny and continuous improvement.
Internally, it clarified priorities for the next phase of the fund’s development, including improving data systems, strengthening impact planning and developing a clearer approach to managing impact through the full investment lifecycle.
Externally, publishing the audit demonstrated a commitment to transparency. As one of the first publicly available impact audits of a UK impact investment fund, it showed that impact practice can be independently reviewed in the same way as financial performance.
The work made impact integration visible, assessable and improvable, strengthening both the discipline of the fund itself and the credibility of impact investing more broadly.