South Africa's Eskom seeks 8.83% tariff hike; NERSA opens 30-day window for public challenge

NERSA docket: Eskom 2027/28 Retail Tariff Structural Adjustment; filed September 2026; public comment deadline October 2, 2026; final decision November 26, 2026.^[1] The amount: an average of 8.83% on household bills, or about 21.22 cents per kilowatt-hour (from 240.28c to 261.50c).^[3]

This is not a fresh revenue request. In February 2026, NERSA admitted it had miscalculated the value of Eskom's generation assets and approved an additional R23.013 billion in revenue recovery for the 2027/28 cycle alone, lifting Eskom's total allowable revenue from R396.425 billion to R419.438 billion for that year.^[3] The current proceeding is a rate-design case: it focuses on how Eskom will structure that already-approved revenue, including the split between basic charges, service fees, and volumetric rates.^[4] The mechanism at work is regulatory capture dressed as rate design. The utility has secured its revenue target through prior proceedings; now it shapes the bill structure to maximize fixed charges (which ratepayers pay regardless of consumption) and minimize volumetric charges (where conservation saves money). A higher fixed charge reduces incentives to reduce electricity use, locks in revenue regardless of efficiency gains, and shifts bill burden toward low-income households that consume least.

The context: South Africa is locked in a decade-long electricity crisis driven by Eskom's aging coal fleet, underinvestment, and operational collapse. The utility's inability to meet demand has cost the economy billions in load-shedding, yet NERSA has approved tariff increases averaging 8, 10% annually since 2016, all passed to ratepayers with minimal lever to resist. Each increase feeds the cycle: tariff shock triggers demand destruction and solar deployment, which shrinks Eskom's revenue base, triggering a rate case to recover lost sales, pushing more customers off-grid, and so on.^[2] The regulator is caught between a hard utility (demanding higher returns to service debt and rebuild fleet) and a hard public (unable to afford the bill). Rather than break the circuit with demand-side investment, renewable procurement at cost, or operational reform, NERSA approves each request and leaves the tariff design to the utility.

Who pays: all South African electricity consumers, with the largest impact falling on municipalities and industrial customers who have already begun defecting to self-generation and regional grids. Residential ratepayers see 8.83% added to their monthly bill immediately upon Eskom implementation (April 1, 2027); municipal customers face the same increase on July 1.^[3] Who wins: Eskom management secures revenue to service debt and fund capex; NERSA avoids the political cost of a rate denial; and the broader electricity market sees another price signal pushing customers toward off-grid alternatives.

The concrete alternative: NERSA should condition any tariff increase on a binding operational and investment discipline. Rather than approving revenue and leaving design to the utility, NERSA should mandate a test year approach that ties Eskom's next general rate case to verified, audited historical costs and actual capex performance, not projections. It should also require that any new tariff structure include a volumetric incentive: basic charges frozen for three years, with volume-based rates adjusted only to recover verified operating-cost changes. This forces Eskom to control costs rather than grow the rate base, and gives ratepayers a lever to reduce exposure through conservation.

The intervention window is narrow. Written submissions close at 16:00 on October 2, 2026.^[3] A public hearing is scheduled for October 8.^[3] NERSA's final decision is due November 26, 2026.^[3] Civil society organizations, consumer groups, municipalities, and individual ratepayers can file comments directly with NERSA, either in writing or for oral presentation at the public hearing. The regulator's consultation document and submission instructions are available on the NERSA website (www.nersa.org.za).