Why Tariff Reform Will Make or Break South Africa’s Electricity Market

South Africa’s electricity reform debate often centres on generation. How many megawatts are coming online, how quickly projects can be built, and how to unlock private investment. Yet these reforms are entirely dependent on the underlying issue of tariffs, writes Nico de Bruyn, CEO of Apollo Africa.

Tariffs represent the critical commercial operating system of any future energy market. It’s where confidence is built or destroyed. Even where a project has a credible generator, a bankable offtaker, and sound contractual structures, it can still fail if the pricing framework is unclear. Uncertainty around network charges, billing structures, and how costs translate into a final invoice makes it difficult for customers to assess value and for lenders to assess risk. In practice, this uncertainty delays transactions and, in some cases, prevents them from reaching financial close.

Reform is already well underway in South Africa as the system begins to move away from a vertically integrated, single-buyer model toward a more open, multi-participant market. Legislative changes, institutional restructuring, and the establishment of a transmission company have all reinforced this shift. But a functioning market only exists when participants understand the rules, trust the settlement process, and are able to price risk with confidence. South Africa finds itself in what can best be described as the ‘hard middle’ where the destination is visible, but the path is not yet clean.

In the old system, opacity could be absorbed. A centralised structure could hide inefficiencies, manage cross-subsidies internally, and carry complexity without exposing it. In a competitive, multi-participant market, that no longer works. Every hidden assumption becomes a future dispute. Uncertainty pushes customers to demand discounts, lenders to increase risk premiums, municipalities to become defensive about revenue, and regulators to intervene in conflicts that should have been prevented through better design. Good projects take longer to close, and some never happen at all.

This is why cost reflectivity matters, and why it’s so often misunderstood. Cost reflectivity doesn’t mean making electricity unaffordable, nor does it justify every tariff increase. It doesn’t remove developmental priorities, and it should never be used as a mechanism to frustrate competition. At its core, it simply means that prices should tell the truth. Customers should be able to see what they are paying for. Investors should understand what revenues support which assets. Lenders should be able to separate energy risk from network risk and policy risk.

Municipalities should recover efficient costs transparently, and policymakers should support social objectives openly rather than embedding them in opaque tariff structures.

The consequences of getting this wrong are most visible in wheeling transactions. These deals rarely fail because the concept is flawed but because the commercial interface between the generator price and the delivered bill is unclear. A customer may agree to a power purchase agreement based on an attractive price, only to receive a final settlement layered with transmission charges, distribution costs, loss factors, time-of-use adjustments, municipal line items, and regulatory uncertainties that were never fully explained. At that point, the product being purchased has moved away from energy supply into abstraction. And that’s a lot harder to finance.

Transparency in billing therefore becomes fundamental. A functioning system must produce a single, clear statement that shows how the bill is built, separating energy charges from network costs and policy-related charges, explaining how loss factors are applied, and showing how changes over time are treated. If a capable finance team cannot audit the bill, a bank will struggle to finance the project and a board will hesitate to approve it.

This is where unbundling plays a practical role. It is often treated as an ideological question, but in reality it’s about clarity. A functioning market requires a clear distinction between the cost of energy and network usage, as well as cost of policy or social interventions. When these are blended together, no participant can see the true picture. Generators cannot determine whether they are competitive, network operators cannot defend their cost recovery, municipalities cannot explain their tariffs, and customers begin to assume that pricing is arbitrary. The result is a steady erosion of confidence. Complexity in the system is inevitable, but opacity is not.

Municipalities sit at the centre of this transition, and their concerns are both real and justified. Electricity revenue is often critical to their financial sustainability, and the shift toward wheeling introduces legitimate questions about revenue erosion, cost recovery, and service obligations. These concerns should be addressed directly. At the same time, they cannot justify opaque pricing or inconsistent methodologies that effectively block participation.

The path forward lies in disciplined reform, grounded in proper cost-of-supply analysis, transparent revenue requirements, and billing systems that customers can understand and trust. For reform to work it must exist within the practical realities of municipal budgeting cycles and institutional constraints.

Ultimately, bankability in this market is determined in the details. Loss factors, curtailment rules, and settlement systems are core drivers of confidence here. If loss factors behave like a black box, curtailment risk is undefined, or settlement processes appear inconsistent or slow, then risk is simply transferred into higher financing costs. A market proves itself not through policy announcements, but through its ability to settle transactions reliably and transparently.

The path ahead requires us to determine what practical progress looks like. Tariffs must be published in a way that clearly separates energy, network, and policy components. Methodologies must be consistent enough to reduce friction across participants. Cost-of-supply discipline must be strengthened, particularly at municipal level. Cross-subsidies should be made explicit, not hidden. The timing of regulatory updates must become more predictable, because uncertainty in timing is itself a cost. Data systems and billing infrastructure must be improved so that customers and financiers can trace how a bill is constructed. And dispute resolution must become faster and more structured, because prolonged uncertainty undermines confidence across the system.

Success here will be visible in the everyday functioning of the market. It will be a customer receiving a bill and understanding it, or a lender modelling downside risk without assuming instability. It’s a municipality explaining its tariff structure with evidence rather than defensiveness; fewer disputes, faster project closures, and lower risk premiums. It’s capital flowing because the rules are intelligible.

South Africa’s electricity future won’t be built by generation capacity alone, but by the quality of the commercial rules that connect generation, networks, policy, and customers into a coherent system. Tariff reform is where these elements meet. It’s where fairness, finance, engineering, and public policy intersect.

The task ahead is to make tariffs more truthful when it comes to cost, risk, subsidy, and how the system actually works. When tariffs tell the truth, markets begin to function. And when markets function, investment follows.