
The cost of electricity in South Africa is determined by a variety of factors, including where you live, whether you receive electricity directly from Eskom or your municipality, the type of meter you have, and your specific usage patterns. One way to save money on electricity in South Africa is to understand peak electricity times and take advantage of off-peak hours, which usually occur between 10 p.m. and 6 a.m. Time-of-Use (ToU) Tariffs offer lower rates during off-peak hours, and some prepaid plans include these tariffs. Additionally, block tariffs are designed to incentivize residents to consume less electricity by making it more expensive as usage moves up through the blocks. Therefore, it is recommended to only buy enough electricity for your monthly consumption to avoid paying higher rates for leftover units.
| Characteristics | Values |
|---|---|
| Electricity cost per kWh | Varies based on the municipality |
| Tariff categories | Residential, urban, rural, municipal and generator |
| Tariff types | Tiered pricing, block tariffs, time-of-use |
| Cheapest time to use electricity | Off-peak hours, typically between 10 p.m. and 6 a.m. |
| Prepaid electricity | Recommended to buy at the beginning of the month |
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What You'll Learn

Prepaid electricity is cheaper at the beginning of the month
The cost of electricity in South Africa varies depending on where you live, whether you receive electricity directly from Eskom or your municipality, the type of meter you have, and your specific usage patterns. However, for those who use prepaid electricity, there is a perception that it is cheaper to buy electricity at the beginning of the month. This perception is not entirely accurate, but there are reasons why it may seem that way.
Firstly, municipalities in South Africa often employ step tariffs or block tariffs, which are designed to incentivize residents to consume less electricity. Under this system, the more electricity you purchase during a month, the more expensive your units become as you move through the tariff steps. At the beginning of each month, the counter resets to zero, and you are once again charged at the lowest rate for your units. As a result, your first purchase of the month will typically be cheaper than subsequent purchases.
Secondly, it is common for people to make their first electricity purchase of the month quite early on, usually between the 1st and 5th. This habit contributes to the perception that electricity is cheaper at the beginning of the month. Additionally, buying electricity at the beginning of the month can help with budget management, as prepaid meters allow you to pay upfront and avoid unexpected costs.
However, it is important to note that the number of units you receive for your purchase remains the same regardless of when you buy it during the month. The key factor influencing the cost of electricity is the number of units you consume, not the timing of your purchase. Therefore, the best way to manage your electricity costs is to only buy as much electricity as you actually need for that month. This strategy ensures that you do not carry over expensive units to the next month and helps you avoid paying additional transaction fees for multiple purchases.
While prepaid electricity may seem cheaper at the beginning of the month due to tariff structures and purchasing habits, the fundamental goal should be to purchase only what you need and avoid unnecessary costs associated with leftover units and transaction fees.
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Time-of-Use tariffs
In South Africa, electricity pricing is managed by the National Energy Regulator of South Africa (Nersa). The cost of electricity varies depending on where you live, whether you receive electricity directly from Eskom or your municipality, the type of meter you have, and your specific usage patterns.
Some prepaid plans offer Time-of-Use (ToU) tariffs, which allow customers to pay less for electricity if they use it during off-peak hours. ToU tariffs are beneficial for those who can shift their energy usage to off-peak hours, such as late at night. By understanding their energy usage and making adjustments, customers can take advantage of the lower rates offered during these times.
In July 2020, new residential Time-of-Use tariffs were introduced for residential customers with smart meters. These tariffs encourage more electricity consumption during the middle of the day, particularly from 10 am to 3 pm, to take advantage of surplus solar generation. This 'solar sponge' tariff is a quarter of the price of the normal network tariff. By promoting solar energy usage during the day, there will be more low-cost renewable energy available.
Additionally, municipalities have introduced block tariffs to incentivize residents to consume less electricity. These tariffs make electricity units more expensive as residents move up through purchase brackets, resulting in higher charges for those with greater electricity consumption. Therefore, it is essential to purchase only the amount of electricity required to avoid paying higher rates for unnecessary units.
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Tiered pricing structures
Electricity prices in South Africa vary depending on where you live, whether you receive electricity directly from Eskom or your municipality, the type of meter you have, and your specific usage patterns. Both Eskom and municipalities apply a tiered pricing structure based on how much electricity you use. Typically, if you use more than 600 kWh per month, you will be moved to a higher tariff rate.
For example, in the City of Cape Town, the residential tariff is structured across three main tiers:
- Lifeline Tariff: This subsidised rate is available to low-income households with a monthly consumption of less than 450 kWh. The first 60 kWh are free, and the rest are billed at R2.37 per kWh.
- Domestic Tariff: For those consuming more than 450 kWh but less than 600 kWh per month, the rate is R3.91 per kWh.
- Home User Tariff: This higher tariff applies to households with significant usage or higher property values, where the rate for consumption over 600 kWh can go up to R4.75 per kWh.
Block tariffs are designed to incentivise residents to consume less electricity. As such, electricity units become more expensive as residents move up through the purchase brackets, which have ascending rates per unit (kWh). This means that residents who consume higher volumes of electricity will end up paying more per unit. Therefore, it is advisable to only buy as much electricity as you need during a month to avoid paying higher rates for unnecessary units.
It is worth noting that prepaid meters can help you manage your budget by allowing you to pay for electricity upfront and avoid surprises on your bill. However, prepaid meters often come with slightly higher rates compared to postpaid systems.
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Off-peak hours
In South Africa, off-peak hours are when electricity demand is at its lowest, and consequently, the cost is at its cheapest. These hours are usually between 10 pm and 6 am, though they can vary depending on the day of the week and the season. During the winter months, from June to August, peak hours change due to additional evening demand when people turn on their electric heaters.
Time-of-use tariffs charge users more for electricity during peak hours, less during "standard hours" between peak and off-peak, and the least during off-peak hours. Some prepaid electricity plans offer time-of-use tariffs, allowing customers to pay less for electricity if they use it during off-peak hours.
To take advantage of off-peak rates, customers can run their appliances after 10 pm. Smart appliances can be programmed to start automatically during these hours. Installing a geyser timer can also help customers heat their water during cheaper tariffs. Similarly, recharging batteries, electronic devices, and electric vehicles at night can save money.
In addition to utilising off-peak hours, South African residents can save money on their electricity bills by only purchasing as much electricity as they consume in a month. This is because block tariffs charge higher rates per unit as consumption increases. Unused units are carried over to the next month but are purchased at a higher rate, so it is not cost-effective to buy more units than necessary.
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Alternative energy sources
The cost of electricity per kWh in South Africa varies based on your specific municipality and how much electricity you use. For example, in the City of Cape Town, the residential tariff is structured across three main tiers:
- Lifeline Tariff: This subsidised rate is available to low-income households with a monthly consumption of less than 450 kWh. The first 60 kWh are free, and the rest are billed at R2.37 per kWh.
- Domestic Tariff: For those consuming more than 450 kWh but less than 600 kWh per month, the rate is R3.91 per kWh.
- Home User Tariff: This higher tariff applies to households with significant usage or higher property values, where the rate for consumption over 600 kWh can go up to R4.75 per kWh.
Prepaid plans offer Time-of-Use (ToU) tariffs, which allow you to pay less for electricity if you use it during off-peak hours.
With electricity costs on the rise and the need to reduce greenhouse gas emissions, South Africa has been focusing on alternative energy sources. The National Energy Regulator of South Africa (NERSA) implemented the Renewable Energy Feed-In Tariff (REFIT) in 2009 to reduce carbon-based power generation and move towards renewable energy sources. The Renewable Energy Independent Power Producers Procurement Programme (REI4P) was also introduced in 2011, with the goal of installing 17.8GW of renewable energy in South Africa before 2030.
Solar Power
Solar energy is a significant alternative source of energy, with South Africa receiving large amounts of solar radiation due to its geographic location. The levelised cost of solar electricity is relative to the quality and quantity of solar radiation in the country. Solar power plants have stimulated the economy, created jobs, and driven the use of other renewable energy sources. The initial cost of solar energy systems is high, but they typically return on investment within 5 to 8 years.
Wind Power
Wind power is another natural and cost-effective alternative energy source that is especially effective in windy areas like Cape Town. Wind turbines convert wind into kinetic energy and mechanical power, which is then transformed into electrical energy.
Hydroelectric Power
Hydroelectric power generated by dams is a cheap and accessible alternative energy source.
Biomass
Biomass is a renewable energy source that South Africa has been exploring, along with other renewable resources.
Sea Ebbs
The use of sea ebbs or ocean waves to generate electrical power is an appealing source of energy due to its unlimited supply and ability to be utilised along ocean coastlines.
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Frequently asked questions
Electricity is the cheapest during off-peak hours, usually between 10 p.m. and 6 a.m.
The price of electricity in South Africa is determined by a tiered pricing structure. The price per unit or kilowatt-hour (kWh) is cheapest in the first block, and as usage increases, the tariff moves to the next block, where the price per unit is more expensive.
Peak hours in South Africa are from 6 a.m. to 9 a.m. and 5 p.m. to 9 p.m. During these times, electricity demand and rates are at their highest.
To save money on your electricity bill, consider the following:
- Understand the tiered pricing structure and try to consume only what you need to avoid moving to a higher tariff rate.
- Take advantage of off-peak hours by running appliances and recharging devices at night.
- Install energy-efficient appliances, switch to LED lighting, and improve insulation.




















