Eskom Tariff Calculator

How the Eskom Tariff Calculator Works

Eskom uses a tiered (block) tariff structure for residential customers on the Homelight tariff. The first block of units consumed each month is charged at a lower rate, with higher rates applying to subsequent blocks. This structure is designed to keep essential electricity affordable while discouraging high consumption.

The 2025/26 Homelight 60A tariff structure (approved by NERSA) has three consumption blocks: 0–600 kWh at the base rate, 601–1 200 kWh at a higher rate, and above 1 200 kWh at the highest rate per unit. A fixed monthly network charge (service charge) applies regardless of consumption.

Most South African households are not direct Eskom customers - they buy electricity through their local municipality (City of Cape Town, City of Johannesburg, eThekwini, etc.). Municipalities buy bulk electricity from Eskom and resell it to residents, applying their own distribution margin - typically 30–50% above Eskom's base rate. Toggle the municipal markup option to estimate a municipality-billed rate.

The 10% usage reduction tip shows the monthly rand saving from modest consumption changes - turning off geysers earlier, switching to LED lighting, and using appliances during off-peak hours. Given Eskom's consistent annual tariff increases (averaging 10% per year since 2007), reducing consumption has an ever-increasing rand value.

How to Use This Calculator

1. 1

   Find your monthly kWh usage

   Check your electricity bill or prepaid meter purchase history. Most bills show usage in kWh (kilowatt hours). If you use prepaid electricity, divide your total rand spend by your municipality's rate per kWh. The South African average household uses approximately 250–800 kWh/month depending on size and appliances.

2. 2

   Check whether you are on Eskom or municipal supply

   If your bill comes from your city (City of Cape Town, City Power, eThekwini, etc.), you are on municipal supply. If it comes directly from Eskom, you are an Eskom direct customer. Toggle the municipal markup option to approximate municipal rates - but note that the exact markup varies by municipality and requires checking your specific municipality's tariff schedule.

3. 3

   Review your monthly cost breakdown

   The calculator shows your usage in each tariff block, the cost per block, the fixed service charge, and the total monthly bill. If your usage is near a block boundary, reducing consumption slightly can keep you in the lower block and save more than a proportional reduction would suggest.

4. 4

   Understand the 10% saving

   The 10% reduction tip shows the monthly saving from modest efficiency measures. Small changes - installing LED lights (R20–R50 each, uses 80% less electricity than incandescent), setting the geyser timer, and washing clothes in cold water - can reduce consumption by 10–20% with minimal inconvenience.

Frequently Asked Questions

What is the current Eskom electricity tariff increase for 2025/26?

NERSA approved an Eskom tariff increase of approximately 12.74% for the 2025/26 financial year (effective 1 April 2025). This follows increases of 12.7% (2024/25) and 18.65% (2023/24). Eskom has historically applied for increases significantly above inflation to service debt and fund maintenance backlogs. Long-term planning should assume electricity costs will continue to rise at 8–12% per year.

Why is my electricity bill from the municipality more expensive than Eskom direct?

Municipalities buy electricity from Eskom in bulk at a reduced rate but charge consumers at a higher retail rate - the margin funds the municipality's distribution infrastructure, maintenance, street lights, and subsidies for indigent households. The markup typically ranges from 30% to 60% above Eskom's Homelight tariff. Cape Town's markup is among the lower ones nationally; smaller municipalities in rural areas sometimes charge significantly more per kWh.

What is a free basic electricity (FBE) allocation in South Africa?

Low-income households registered as indigent with their municipality receive a free basic electricity allocation of 50–100 kWh/month, depending on the municipality. This is provided at no cost through a credit on the prepaid meter or as a bill reduction. Qualification criteria and the exact allocation vary - contact your municipality's indigent support office for details. Free basic electricity does not apply to Eskom direct customers who must apply through Eskom's own indigent programme.

What are South Africa's biggest electricity consumers in the home?

The electric geyser is typically the single largest electricity consumer in a South African home - accounting for 30–40% of total usage. Other major consumers include electric stoves and ovens (15–20%), pool pumps (10–15%), air conditioning (10–20% in summer), and tumble dryers (10% when used). The most cost-effective interventions are geyser insulation, a geyser timer or solar water heater, LED lighting throughout, and a variable-speed pool pump.

How does load-shedding affect my electricity bill?

During load-shedding, electricity usage drops because power is physically unavailable. Your monthly bill may actually be lower in months of high load-shedding. However, load-shedding causes indirect costs: food spoilage from non-functional refrigerators, fuel costs for generators, and damage to appliances from power surges when supply is restored. These indirect costs often far exceed the savings on the electricity bill.

What is a prepaid meter and how does it work in South Africa?

A prepaid electricity meter (token meter) requires you to purchase electricity in advance using a 20-digit token generated by your municipality or Eskom. You top up at any supermarket, municipal payment point, bank, or online. The token is entered on the keypad of the meter. Prepaid meters eliminate billing disputes and overdue accounts - you only use what you have paid for. Most South African municipalities now install prepaid meters in new connections and can convert existing postpaid meters on request.