The Commercial Case for Sustainability: Where ESG Protects and Creates Business Value

An Emergent Africa perspective

A sustainability initiative should be able to answer a straightforward boardroom question: what changes commercially if we do this well?

The answer might involve lower operating costs, more dependable production, stronger customer relationships, improved access to funding or an opportunity to enter a growing market. It might also involve protecting the business from an exposure that financial reporting has not yet made visible.

For executives, the challenge is deciding which opportunities deserve attention, capital and management capacity. A long list of environmental, social and governance commitments offers little guidance when the organisation must choose between upgrading equipment, strengthening water security, improving supplier practices or developing a new product.

Sustainability becomes commercially useful when those choices are connected to the economics of the business. That requires a clear account of where value arises, what must happen to realise it, how much uncertainty remains and who owns delivery.

Research from McKinsey, Boston Consulting Group, Bain & Company, Deloitte and PwC provides useful evidence for this approach. Their findings point towards potential business benefits, while leaving an essential responsibility with management: establishing whether a particular initiative makes sense for a particular company.

This paper develops a practical approach for South African executives. It considers five commercial pathways—operating costs, resilience, customer requirements, capital and growth—and sets out how to translate them into a prioritised portfolio of action.

1. Put the commercial mechanism at the centre

“Improving sustainability” is an ambition. An investment case needs to explain the sequence through which action produces value.

For example, replacing inefficient equipment may reduce electricity consumption per unit produced. That reduces operating expenditure, subject to utilisation, tariffs, maintenance and financing costs. Improving supplier traceability may help a manufacturer meet a customer’s procurement requirements, protecting its eligibility for future contracts. Strengthening workplace practices may reduce disruption and improve retention in roles where replacement is expensive.

Each example contains a different mechanism. Combining them under a single ESG heading can obscure the evidence required to justify investment.

McKinsey’s foundational analysis identifies five connections between ESG and value: revenue growth, cost reduction, reduced regulatory and legal intervention, employee productivity, and better investment decisions. Its qualification remains valuable: these connections do not apply equally in every situation. Executives must establish which are material to their business. McKinsey

A useful starting point is to distinguish three outcomes:

• Value captured: measurable improvements such as lower expenditure or additional contribution margin.
• Value protected: reduced exposure to interruption, customer loss, asset impairment or other downside.
• Future opportunities preserved: capabilities or investments that keep commercially attractive options available.

These outcomes require different evidence. A reduction in an electricity bill can be verified directly. A reduction in disruption risk requires scenarios and probability estimates. An emerging market opportunity requires evidence of demand and a staged investment decision.

The discipline is to make those differences explicit. A speculative opportunity should not be presented with the same confidence as a contracted saving.

2. Operating costs: begin with resource productivity

Resource efficiency provides one of the clearest links between sustainability and financial performance. Energy, water, materials, packaging and waste are physical flows with costs attached. Understanding where they are consumed, lost or unnecessarily purchased can reveal opportunities that conventional budget reviews overlook.

The first task is to establish a credible baseline. Total expenditure alone is insufficient because tariffs, production volumes and product mix can conceal operational performance. A factory may spend more on electricity while becoming more efficient, or spend less simply because production has fallen.

Management therefore needs both absolute consumption and meaningful intensity measures: electricity per tonne, water per batch, packaging per shipment or waste per saleable unit. These measures should reconcile with financial expenditure and reflect the operational conditions being compared.

The opportunity set often includes maintenance and process improvements alongside major capital projects. Compressed-air leaks, poorly controlled refrigeration, inefficient cleaning cycles, avoidable product losses and unnecessary transport movements can all deserve examination. Their attractiveness depends on local conditions and verified savings.

The investment assessment must include the full cost of implementation. Equipment installation may interrupt production. A new process may require training, specialist maintenance or additional consumables. Reduced packaging may increase product damage if poorly designed. Resource savings should be evaluated alongside quality, service and operational consequences.

Benefits must also be counted once. If process improvements reduce electricity demand, the business should size any subsequent energy investment against that lower requirement. Adding the original savings estimates together would overstate the combined return.

The executive objective is a sustained improvement in unit economics, supported by measurement that separates genuine efficiency from changes in activity.

3. Resilience: quantify the earnings that depend on continuity

Some sustainability investments primarily protect the ability to operate.

For a South African business, the relevant assessment may include water availability, energy supply, transport dependencies, weather exposure, supplier concentration and relationships with surrounding communities. The importance of each factor differs by site, sector and operating model.

A water-reuse investment illustrates the distinction between savings and resilience. Its financial case may appear modest if assessed only against municipal water expenditure. Its significance can change when management considers the production dependent on reliable water availability and the consequences of interruption.

The analysis should begin with operational questions. Which processes stop first? How long can the site continue? Can output move elsewhere? What inventory provides a buffer? What happens to quality, customer delivery and restart costs?

Those answers support a financial assessment of contribution margin at risk, additional expenditure, recovery time and contractual consequences. Where probabilities are uncertain, management should use ranges and severe but plausible scenarios rather than a single apparently precise estimate.

Expected annual loss can help compare options, but it should not determine every resilience decision. An event with a low estimated probability may still threaten liquidity, safety or the organisation’s survival. The board must consider the scale of loss it is prepared to tolerate.

Resilience benefits should also reflect existing protections. Insurance, spare capacity, emergency arrangements and alternative suppliers may already reduce exposure. A proposed project should claim only the additional protection it provides.

The commercial question is therefore broader than whether the project pays for itself through routine savings. It is whether the expenditure is proportionate to the vulnerability, and whether a more effective way of managing that vulnerability exists.

4. Customer requirements: protect the right to compete

Sustainability can influence revenue before it generates a price premium.

A customer may require emissions information, responsible sourcing evidence, credible labour practices or traceability as a condition of supplier approval. Meeting those expectations can preserve access to business even when the buyer will not pay more.

Bain’s 2025 research surveyed more than 750 global business-to-business customers across several industrial sectors. Half reported buying more from their more sustainable suppliers, and nearly 70% planned to accelerate those purchases over the following three years. These are reported behaviours and intentions across a global sample, rather than a forecast for an individual South African supplier. Bain & Company

The practical response is to investigate actual customer requirements.

Sales and account teams should establish which requirements are mandatory, which influence evaluation scores and which remain general aspirations. They should identify the evidence buyers accept, the deadlines involved and the commercial consequences of falling short.

This creates a much stronger foundation than an assumption that customers prefer sustainable businesses. A requirement in a tender document, a procurement policy or a contract renewal discussion provides a concrete basis for action.

Management should distinguish revenue protected from revenue won. Maintaining eligibility for an existing account is different from gaining additional market share. Neither should automatically be counted at the full sales value: the relevant financial benefit usually depends on contribution margin, retention probability and the cost of meeting the requirement.

Customer segmentation matters too. Export customers, multinational procurement teams, public buyers and domestic consumers may value different attributes. The company should invest against the requirements of its chosen markets, with commercial teams accountable for validating the connection between sustainability performance and purchasing decisions.

5. Access to capital: make the business easier to assess and fund

The financing case for sustainability requires care. An improved ESG profile does not automatically produce a lower borrowing rate, and a funding label does not establish that a transaction is commercially attractive.

The more useful starting point is the funder’s assessment of the underlying business. Can the company explain material environmental and social exposures? Are transition investments reflected in capital plans? Are forecasts credible? Can management demonstrate control over the information on which its commitments depend?

A business with clear answers is better prepared for due diligence than one relying on broad assurances.

For a specific financing proposal, treasury should establish the actual terms available. Any potential pricing benefit must be assessed alongside transaction fees, verification costs, reporting obligations, performance conditions and consequences if targets are missed.

The value may instead arise through a longer tenor, a wider pool of eligible funders or funding suited to an asset’s economic life. These advantages should be described separately from interest savings.

BCG’s 2025 analysis emphasises the importance of connecting sustainability initiatives to financial value, observing that investors reward announcements with a clear business case. Its research concerns market responses to corporate announcements; it does not establish that every sustainability investment improves valuation or financing terms. BCG

Executives should apply that lesson through transparent communication. Explain the investment, its cash-flow implications, its risks and the evidence behind the expected outcome. A credible account of trade-offs is more useful than an ambitious claim unsupported by an executable plan.

6. Growth: solve a problem customers will pay to address

Sustainability can create opportunities for growth when it helps customers achieve outcomes they value.

Potential examples include equipment that uses fewer resources, services that extend asset life, packaging that reduces logistics costs, or information that helps a customer manage supply-chain requirements. The commercial opportunity depends on the problem solved and the company’s ability to deliver profitably.

Deloitte’s 2025 C-suite Sustainability Report, based on more than 2,100 executives across 27 countries, found that “revenue generation was the most frequently reported business benefit” of sustainability actions. That finding supports examining growth opportunities, while remaining a survey result rather than proof that any proposed offering will succeed. Deloitte

The business case should identify a specific customer, use case and purchasing decision. What expenditure will the offering replace? What operational difficulty will it resolve? Why would the customer choose it over existing alternatives?

Commercial testing should then establish willingness to purchase, achievable pricing, delivery costs and repeatability. A successful demonstration is encouraging, but growth requires a model that works beyond a closely supported pilot.

Consider a repair and refurbishment proposition. It may reduce customers’ replacement expenditure and generate recurring service revenue. It may also require spare-parts inventory, technical capabilities, reverse logistics and working capital. It could reduce sales of new products. All these effects belong in the assessment.

The strongest opportunities often emerge close to existing capabilities. A company that already understands a customer’s equipment or processes may be well placed to improve their resource performance. Management should still test whether that advantage translates into demand and attractive margins.

7. Keep people and governance inside the commercial assessment

A commercially grounded sustainability agenda must retain the social and governance dimensions of ESG.

Workforce capability, safety, employment practices, supplier conduct and community relationships can affect operational continuity and the quality of execution. Governance determines whether commitments are tested, investments are authorised responsibly and reported results can be trusted.

The business implications should be made specific. For a critical occupational group, management might examine turnover, recruitment costs, vacancy duration, overtime and lost capacity. For a supplier programme, it might assess delivery reliability, quality failures and the capacity to meet required standards.

These measures should inform decisions without implying that every human outcome can or should be reduced to a financial return. Legal duties, safety requirements and basic standards of responsible conduct remain obligations even where a convenient payback calculation is unavailable.

Executives should also avoid overstating attribution. If absenteeism falls after several workforce interventions, it may be difficult to assign the improvement to one programme. Evaluation should acknowledge other changes, use suitable comparisons where possible and distinguish observed improvement from a proven causal effect.

Governance provides the connecting discipline. Named owners, clear escalation, procurement controls, documented assumptions and reliable reporting help ensure that intended benefits survive implementation. They also make it easier to identify when an initiative should be redesigned or stopped.

8. Prioritise through gates, evidence and portfolio balance

The following framework is Emergent Africa’s proposed approach to executive prioritisation. It combines commercial assessment with explicit treatment of obligations, uncertainty and delivery capacity.

Gate one: establish what must happen

Identify legal, safety, contractual and other non-discretionary requirements first. These should not compete with optional projects solely on financial return. The decision is how to meet the requirement effectively, within the necessary timeframe.

Gate two: define the business exposure or opportunity

Specify the site, customer, product, process or financing need affected. A proposal should identify the commercial mechanism, the baseline and the consequence of taking no action. “Improves reputation” is insufficient without explaining whose behaviour may change and why.

Gate three: test the evidence

Grade the quality of the assumptions. Metered consumption and supplier quotations provide a different level of confidence from management estimates or broad market surveys. Where evidence is weak, fund the next useful test rather than prematurely committing the entire investment.

Gate four: assess economics and deliverability

Compare lifecycle costs, cash-flow timing, net present value, payback, downside exposure and delivery requirements. Include dependencies, management capacity and implementation disruption. Financial attractiveness is of limited use if the organisation cannot deliver the project.

Gate five: build a balanced portfolio

Allocate initiatives to distinct decision categories:

A scorecard can support comparison within these categories. It should not allow a strong presentation or an attractive aggregate score to conceal a critical weakness. A project dependent on an unconfirmed customer commitment remains uncertain, regardless of its performance against other criteria.

9. An illustrative business case: separate savings from protection

Consider a fictional South African manufacturer evaluating a water-reuse project. The following figures are illustrative assumptions, not industry benchmarks or an Emergent Africa client result.

The project requires R8 million upfront. Expected annual water and discharge savings are R2.4 million, while additional operating and maintenance expenditure is R600,000. Direct annual net savings are therefore R1.8 million, producing a simple payback of approximately 4.4 years.

That calculation provides a starting point. A complete investment appraisal would consider timing, tax, discounting, equipment life, replacement expenditure and residual value.

Now assume management estimates the annual probability of a material water-related interruption at 20%, with an estimated R15 million loss per event. The project is expected to reduce that probability to 5%, while the estimated loss per event remains unchanged.

Under those assumptions, expected annual loss falls from R3 million to R750,000—a reduction of R2.25 million. This is a modelled risk benefit, not a recurring cash saving that finance can add to the operating budget.

The board should examine the evidence behind both probabilities and the loss estimate. It should also test whether the project changes interruption severity, whether losses overlap with insurance recoveries, and whether alternative investments provide better protection.

If a customer additionally values the improved water resilience, that benefit should remain qualitative until supported by credible commercial evidence. It should not become an invented revenue premium.

The result is a transparent decision: direct savings, modelled protection and unquantified strategic benefits remain visible and distinct.

10. Make the information reliable enough to support decisions

The quality of a sustainability business case depends on the information beneath it.

A company may have extensive reporting while struggling to connect consumption to sites, emissions to products, suppliers to contracts or initiatives to financial outcomes. Inconsistent definitions can make comparisons misleading and leave benefits difficult to verify.

The data foundation should therefore establish ownership, common definitions, source records and a clear audit trail. Site, asset, product and supplier master data need to connect with the operational and financial information used in investment decisions.

This is where decision intelligence and master data management become commercially relevant. Their purpose is to help executives understand the consequences of choices using consistent information and explicit assumptions.

Technology should follow that decision requirement. A reporting platform is useful when it supports reliable collection, accountability and review; it cannot compensate for unclear ownership or unsupported claims.

Emergent Africa’s ESG consulting, data expertise and CatalytiX reporting platform can support this connection between sustainability priorities, evidence and management oversight. The objective is to make reporting useful to the people allocating resources and responsible for results.

Finance should validate realised financial benefits. Operational teams should explain performance changes. Sustainability specialists should maintain methodological consistency and the integrity of environmental and social measures.

11. Move from a portfolio of intentions to accountable execution

A practical first 90 days should produce a focused set of decisions.

During the first month, management can identify the most material cost, continuity, customer and capital exposures, establish available baselines and separate mandatory actions from discretionary opportunities.

The second month should test the leading proposals. This includes validating customer requirements, obtaining credible cost estimates, examining operational dependencies and developing downside scenarios. Weak assumptions should trigger targeted investigation.

The third month should establish the delivery portfolio: approved investments, staged experiments, required controls and initiatives that will stop or wait. Each approved initiative needs an accountable executive, milestones, a benefits baseline and a review date.

PwC’s 2025 Global CEO Survey reported that 33% of CEOs saw increased revenue from climate-friendly investments over the preceding five years, compared with 5% reporting a decrease. These findings demonstrate reported commercial potential, while leaving individual companies to establish their own returns. pwc.com

Execution reviews should ask whether the original business case remains valid. Changes in costs, demand, technology or customer commitments may justify accelerating, redesigning or stopping a project. A commitment to sustainability does not remove the need to learn.

Boards should receive a concise view of expenditure, realised benefits, material exposures, delivery constraints and decisions required. Measures of activity—training completed, assessments conducted or reports submitted—should sit alongside evidence of business and sustainability outcomes.

Sustainability earns a durable place in corporate strategy when leaders can explain where it protects earnings, improves competitiveness and creates worthwhile opportunities. That explanation becomes credible through disciplined choices, trustworthy information and accountable delivery.

The executive test is clear: can we show what value is at stake, why this action is justified and how we will know whether it has worked?

Research references

The paper draws on five major global consulting firms. The prioritisation framework and numerical illustration are Emergent Africa analysis, rather than models attributed to these firms.

1. McKinsey & Company (2019): Five ways that ESG creates value.
2. Boston Consulting Group (2025): Six Ways to Link Sustainability and Value Creation.
3. Bain & Company (2025): Sustainability is not dead—CEOs, consumers and B2B buyers continue to act sustainably, and tie it to business value.
4. Deloitte (2025): 2025 C-suite Sustainability Report.
5. PwC (2025): 28th Annual Global CEO Survey: Reinvention on the edge of tomorrow.