Eskom Tariffs to Surge on 1 April as Nersa Blunder Hits Home

Why It Matters

The surge underscores regulatory risk and escalating energy costs that strain households, businesses, and investment confidence in South Africa’s economy.

Key Takeaways

• Nersa raises tariffs 8.76% for direct customers, 9.01% for municipalities
• Error correction adds R54 billion to Eskom’s allowable revenue
• Tariff hikes outpace inflation, six‑fold real increase since 2007
• Court ordered public consultation after secret settlement deemed unlawful
• Forensic audit launched to investigate Nersa’s calculation mistake

Pulse Analysis

The South African power sector has been on a steep price trajectory, with Eskom’s retail tariffs climbing far faster than consumer price inflation. Since 2007, cumulative increases have eclipsed inflation by nearly six times, eroding household disposable income and squeezing industrial margins. The latest Nersa decision pushes the 2026/27 tariff for direct customers to 8.76% and municipal rates to 9.01%, marking the seventh consecutive year of double‑digit hikes. This pattern underscores the structural cost pressures embedded in Eskom’s aging generation fleet and constrained revenue model.

Nersa’s miscalculation of the Regulatory Asset Base exposed a critical governance gap in South Africa’s energy regulation. The regulator initially set a modest 5.36% increase for 2026/27, but Eskom’s challenge revealed an understated revenue shortfall of roughly R54 billion. After a high‑court rebuke that condemned the secret settlement, Nersa was forced to redo the determination through a public consultation, ultimately raising the tariff by over three percentage points. The episode highlights the vulnerability of tariff setting to data integrity issues and the need for transparent, accountable oversight mechanisms.

The steep tariff hike will reverberate across South Africa’s economy, raising operating costs for manufacturers and feeding into higher electricity bills for households. Investors are likely to reassess the risk profile of Eskom and related infrastructure projects, demanding clearer cost‑recovery frameworks and stronger regulatory certainty. Policymakers may accelerate reforms such as unbundling generation assets, expanding renewable procurement, or introducing targeted subsidies to shield vulnerable consumers. Without decisive action, the tariff trajectory could further dampen growth and exacerbate social discontent.