Sustainability is increasingly being positioned as a driver of long-term financial performance in South Africa’s private markets, as institutional investors look beyond conventional risk-and-return measures to assess how environmental and social factors affect asset values, operating costs and future investment returns. For retirement funds, the approach offers a way to connect members’ long-term financial security with investments in infrastructure, affordable housing, renewable energy and essential services.
The argument challenges the perception that impact investing requires investors to sacrifice financial returns in exchange for social or environmental benefits. Instead, proponents contend that businesses addressing persistent economic and social needs can generate commercial value when projects are properly structured, risks are managed and demand is sufficiently strong.
This approach is particularly relevant in South Africa, where infrastructure constraints, unemployment and unequal access to essential services create both investment challenges and opportunities. Private capital can support projects that respond to these needs, while pension funds can gain exposure to assets whose performance is linked to long-term demand rather than solely to short-term market movements.
Traditional investment analysis has focused on the relationship between risk and return. Incorporating sustainability adds another dimension: how an investment affects the environmental and social systems around it, and how changes in those systems may subsequently affect the investment itself. Climate change, resource scarcity, community relations and governance failures can influence project costs, operating continuity, access to financing and the value an investor ultimately receives when an asset is sold.
Environmental, social and governance considerations, commonly known as ESG, can therefore be financially material. A project delayed by community opposition, for example, may incur additional costs and miss revenue targets. An energy-intensive business may face higher operating expenses as electricity prices change or carbon-related requirements tighten. Conversely, investments that improve resource efficiency, reduce waste or address unmet demand may uncover savings and revenue opportunities that conventional financial analysis overlooks.
The distinction between ESG and impact investing is important in this context. ESG analysis focuses on identifying and managing environmental, social and governance risks and opportunities that could affect an investment. Impact investing places greater emphasis on the measurable social or environmental outcomes generated by the investment itself. Although their objectives differ, the two approaches can reinforce each other: an impact that is initially external to a business can become a financial risk if it is ignored, while better management of material ESG issues can strengthen both commercial performance and positive outcomes.
The potential relationship between sustainability and financial returns is visible in South Africa’s renewable energy sector. Private investment has helped expand generation capacity through projects that sell electricity under defined commercial arrangements. Such projects can provide long-term revenue visibility, although returns remain exposed to factors including construction delays, financing costs, equipment performance, grid constraints and changes in contractual or regulatory conditions.
The renewable energy experience illustrates how private capital can support infrastructure development while pursuing financial objectives. It also shows why sustainability-related investments still require detailed due diligence. The presence of an environmental benefit does not by itself guarantee commercial success; project economics, reliable counterparties and operational performance remain central to investment decisions.
Affordable housing and student accommodation offer another example. These assets respond to continuing demand for housing and access to education, while potentially generating rental income over extended investment periods. A recent example is the Summerstrand Student Village development in Gqeberha, which expanded accommodation near Nelson Mandela University. The project involved acquiring 484 existing beds and developing another 832, creating a 1,316-bed student accommodation asset. According to Old Mutual Alternative Investments, the completed development was fully occupied within a month, demonstrating demand for accommodation in the affordable National Student Financial Aid Scheme market.
The development illustrates how an investment can address a practical social need while generating income from an operating asset. Its broader effects may include reducing the distance students travel to campus and improving access to suitable accommodation. The extent to which these benefits translate into improved academic outcomes or wider community development, however, requires separate evidence rather than being assumed from occupancy rates alone.
Sustainability considerations can also uncover efficiencies during project design and construction. In one affordable housing project described in the source article, the use of lighter materials reportedly reduced transport requirements and cement use while improving insulation and the overall cost profile. Such decisions show how environmental analysis can influence the economics of a project before construction begins. Lower material requirements, reduced energy consumption and more efficient building design can affect both capital expenditure and operating costs.
Private markets may be well placed to pursue these opportunities because investors often hold assets for longer periods and can work directly with management teams to implement operational improvements. Unlike investors who primarily trade listed securities, private-market investors may have greater scope to influence business strategy, capital expenditure, governance and performance measurement. Their ability to exercise that influence varies by investment structure and ownership rights, but active ownership can help translate sustainability objectives into practical business decisions.
Long investment horizons are particularly relevant to retirement funds, whose obligations to members extend over decades. Infrastructure, private equity, private debt and property can complement listed investments by providing exposure to different sources of return. However, private-market assets also carry risks, including illiquidity, valuation uncertainty, complex fee structures and limited opportunities to exit quickly. Trustees must therefore assess whether an investment’s expected return and impact justify those risks within the overall portfolio.
South Africa’s regulatory environment also places greater emphasis on responsible investment and the consideration of sustainability-related risks. Regulation 28 of the Pension Funds Act requires retirement funds to consider ESG factors where they may materially affect the long-term performance of assets. The Financial Sector Conduct Authority has also issued guidance on how retirement funds should consider sustainability factors in investment decision-making. These requirements do not mean that trustees must select investments solely because they are labelled sustainable; rather, they must consider material risks and opportunities in line with their fiduciary duties.
Measurement remains a challenge for impact investing. Employment created, housing units delivered, learners accommodated and emissions avoided can provide useful indicators, but these figures do not always reveal the full extent of an investment’s contribution. Investors need to distinguish between outputs, such as the number of homes built, and longer-term outcomes, such as improved housing security or reduced household vulnerability. They must also consider additionality: whether the outcome would have occurred without the investment, and how much of the result can reasonably be attributed to it.
The context in which an investment operates matters. Improving a road in a region with extensive transport infrastructure may generate limited additional social benefit, while connecting a remote community to a hospital can significantly improve access to healthcare. Similarly, a job created in a high-unemployment area may have different social implications from one created in a market where employment opportunities are already plentiful. These differences make consistent measurement important, even when impact cannot be reduced to a single figure.
For pension fund trustees, the central task is to balance financial responsibility with a clear understanding of how investments affect the economy and society. This requires engagement with fund managers on transition costs, emissions exposure, social risks, governance practices and the evidence used to substantiate impact claims. It also requires a realistic view of the trade-offs between expected returns, liquidity, risk and measurable outcomes.
The case for sustainability in private markets is therefore not that every socially beneficial investment will outperform, or that private assets should replace listed investments. It is that environmental and social factors can be financially material and that investments addressing durable needs may offer opportunities for long-term value creation when supported by sound commercial structures and disciplined management.
As South Africa seeks to address infrastructure shortages, expand affordable housing and improve access to essential services, retirement capital could play a role in financing these priorities. Whether that capital delivers for both members and communities will depend on rigorous due diligence, active ownership, transparent impact measurement and a long-term investment approach. The financial returns members receive and the economic conditions in which they eventually retire are closely connected, making sustainability an increasingly important consideration in how private-market capital is deployed.
