Prepaid electricity rates in South Africa vary significantly depending on where you live and who your electricity provider is. Whether you are supplied directly by Eskom or by your local municipality, the price you pay per kilowatt-hour (kWh) depends on a combination of regulatory approvals, municipal budgets, and consumption-based tariff structures.
Below is a comprehensive guide to current prepaid electricity rates across South Africa, including a city-by-city breakdown and examples of how many units you can buy for R100.
Prepaid Electricity Rates Per Unit in South Africa (Current Year)
Understanding the Two Types of Electricity Supply
Before looking at specific rates, it is important to understand that South Africa has two primary ways for households to access electricity.
Eskom Direct Customers are households that buy electricity directly from Eskom. These are typically located in areas not serviced by a local municipality. Eskom’s tariffs are approved by the National Energy Regulator of South Africa (NERSA) and are adjusted annually. For the current financial year, Eskom’s tariffs for direct residential customers increased by approximately 8.76%, effective 1 April of the current year.
Municipal Customers are households that buy electricity from their local municipality (e.g., City of Cape Town, City of Johannesburg, eThekwini). Municipalities purchase bulk electricity from Eskom and then add their own distribution and service costs. Municipal tariffs typically increase on 1 July each year, with an average increase of approximately 9.01% approved for the current year.
Understanding Inclining Block Tariffs (IBT) – What Do Block 1, Block 2 Mean?
Most municipalities in South Africa use a pricing system called an Inclining Block Tariff (IBT). This is the most common cause of confusion when buying prepaid electricity, as customers often notice that their R100 buys fewer units later in the month than it did at the beginning.
How Block Tariffs Work
Under an IBT system, the price per kilowatt-hour (kWh) is divided into “blocks” or “tiers” of consumption. The first block (Block 1) covers your lowest usage and has the cheapest rate. As you use more electricity and move into higher blocks, the rate per kWh increases. This structure is designed to encourage electricity conservation by making heavy usage more expensive.
A Practical Example
Imagine your municipality uses the following four-block tariff structure for domestic prepaid customers:
| Consumption Block | Monthly Limit | Rate per kWh (excluding VAT) |
|---|---|---|
| Block 1 | 0 – 50 kWh | R2.01 |
| Block 2 | 51 – 350 kWh | R2.59 |
| Block 3 | 351 – 600 kWh | R3.62 |
| Block 4 | Over 600 kWh | R4.28 |
Here is what happens when you buy electricity throughout the month:
– Your first purchase of the month uses up Block 1 units first. For the first 50 kWh you buy, you pay only R2.01 per kWh.
– Once you have purchased 50 kWh in that month, you move into Block 2. The next 300 kWh you buy (from 51 kWh to 350 kWh) cost R2.59 per kWh.
– If you continue buying electricity and exceed 350 kWh for the month, you enter Block 3. Units from 351 kWh to 600 kWh cost R3.62 per kWh.
– Once you exceed 600 kWh in a single month, every additional unit costs the highest rate of R4.28 per kWh (Block 4).
Why Your R100 Buys Different Amounts at Different Times
This block system explains why customers often complain that “the price of electricity keeps changing.” The price is not changing arbitrarily. What is happening is that you are moving into higher, more expensive blocks as your total monthly consumption increases.
– On the 1st of the month, you have consumed 0 kWh. Your R100 buys units entirely within Block 1 at the cheapest rate. This is when R100 goes furthest.
– By the middle of the month, you may have already purchased 200 kWh. You are now in Block 2. Your R100 buys fewer units because the rate is higher.
– At the end of a high-usage month (e.g., winter with heaters running), you may be in Block 3 or Block 4. Your R100 buys the fewest units because you are paying the highest rate.
Visual Example of R100 Purchases
| Purchase Timing | Block Applied | Rate per kWh (approx) | Units Received for R100 |
|---|---|---|---|
| First purchase of the month | Block 1 | R2.01 | 49.8 kWh |
| Mid-month purchase (after 200 kWh used) | Block 2 | R2.59 | 38.6 kWh |
| Late-month purchase (after 400 kWh used) | Block 3 | R3.62 | 27.6 kWh |
| End of high-usage month (after 650 kWh used) | Block 4 | R4.28 | 23.4 kWh |
This is why budgeting your electricity purchases matters. Buying larger amounts less frequently (e.g., R500 at the start of the month) keeps more of your purchase within the cheaper blocks compared to buying R100 five separate times.
Eskom’s Change to Flat Rate
In April of the current year, Eskom restructured its Homelight tariff for prepaid customers from a block system to a single flat rate. This means that Eskom direct customers pay the same price per kWh regardless of how much they buy in a month. Most municipalities, however, continue to use the inclining block system.
Eskom Prepaid Electricity Rates (Direct Customers)
Eskom Homelight 20A Prepaid (Standard Residential)
| Detail | Information |
|---|---|
| Tariff Structure | Flat rate (no blocks) |
| Rate per kWh (excluding VAT) | Approximately R2.36 |
| Rate per kWh (including VAT) | Approximately R2.71 |
| Effective Date | 1 April of the current year |
What R100 buys you: Approximately 36.9 kWh
Eskom Homelight 60A Prepaid (Higher Consumption Households)
| Detail | Information |
|---|---|
| Tariff Structure | Flat rate |
| Rate per kWh | Approximately R3.44 (including VAT) |
| Effective Date | 1 April of the current year |
What R100 buys you: Approximately 29.1 kWh
Important notes on Eskom tariffs: Eskom has been shifting towards higher fixed charges to recover infrastructure costs. Eskom is also introducing a new purchasing mechanism called “Easy Electricity” which will allow customers to buy electricity in both rand and kilowatt-hours. Notably, once purchased, these prepaid tokens will not expire.
How Load Shedding Affects Your Prepaid Electricity
Load shedding has become a reality of daily life in South Africa, and it has several significant impacts on prepaid electricity customers that go beyond simply being without power.
The Direct Impact: No Access During Outages
During load shedding, your electricity supply is cut off entirely. This means that if your prepaid meter runs out of credit during a power outage, you cannot purchase or load new electricity tokens until the power returns. For this reason, it is wise to keep a buffer of at least 50-100 kWh on your meter at all times, especially during winter months when load shedding is often more severe.
The Financial Impact: Wasted Units and Spoilage
Load shedding does not refund your prepaid units. If you have electricity on your meter and the power goes out, those units are simply unavailable for use during the outage period. They remain on your meter and are not lost, but you are paying for electricity you cannot access.
More significantly, load shedding leads to indirect financial losses:
– Food spoilage: Perishable food in refrigerators and freezers can spoil during extended outages. A full freezer can defrost within 24-48 hours without power, resulting in hundreds or even thousands of rands in lost food.
– Electronic damage: Power surges when electricity is restored can damage sensitive electronics, appliances, and even your prepaid meter itself. Surge protectors are a worthwhile investment.
– Alternative energy costs: Many households spend money on gas for cooking, candles, batteries, and even small generators or inverters to cope with outages. These are additional costs that do not replace your electricity bill.
The Behavioral Impact: Changed Usage Patterns
Load shedding changes when and how households use electricity, which can affect your monthly consumption and block tariff progression:
– Rushed usage: When the power comes back on, many households rush to cook, shower, do laundry, and charge devices all at once. This concentrated usage draws high power simultaneously, which can trip circuit breakers and push you into higher tariff blocks faster.
– Extended outage periods: In areas with higher stages of load shedding (Stage 4 and above), households may be without power for 8-12 hours per day. This can lead to “panic purchasing” of electricity when supply returns, which may fall into higher-priced blocks if you have already made purchases earlier in the month.
– Increased use of alternative energy: If you rely on a generator or inverter during outages, you are still consuming fuel or battery power. These costs are not reflected in your prepaid electricity bill but are real household expenses.
Managing Your Prepaid Electricity During Load Shedding
Here are practical strategies to minimise the impact of load shedding on your electricity budget:
– Keep a reserve: Never let your meter run below 50 kWh. Top up as soon as you drop below this threshold. Use your municipality’s app or USSD code to check your balance regularly.
– Buy at the start of the month: Purchasing a larger amount on the 1st of the month ensures you have sufficient units for the entire month and keeps more of your purchase in the cheaper block tariff rates.
– Stage your usage: When power returns, avoid switching on every appliance at once. Stagger your usage over 20-30 minutes to avoid high peak demand.
– Invest in a small inverter: A small inverter for your TV, Wi-Fi router, and a few lights allows you to continue using some appliances without draining your prepaid units on alternative energy sources.
– Protect your appliances: Use surge protectors for sensitive electronics. Consider unplugging valuable appliances before the scheduled outage time and only plugging them back in 10-15 minutes after power is restored, once the grid has stabilised.
– Know your schedule: Use load shedding apps like Eskom se Push or ESP to know exactly when your area will be affected. Plan your high-energy tasks (cooking, laundry, ironing) around the outage schedule.
What to Do If Your Meter Stops Working After Load Shedding
If your prepaid meter displays an error message or stops working after a power outage:
– Wait 30 minutes: Sometimes the meter needs time to reboot. Do not attempt to reset or tamper with the meter.
– Check for error codes: Common codes include Error 2 (battery issue) or Error 4 (memory problem). Contact your municipality with the error code.
– Do not tamper: Attempting to bypass or repair your meter yourself is illegal and can result in heavy fines or criminal charges. Eskom estimates that electricity theft, including meter tampering, costs the country billions annually.
– Report promptly: Call your municipality’s call centre or visit their service desk. Be prepared to provide your meter number, account number, and a description of the problem.
Municipal Prepaid Electricity Rates by City
City of Cape Town
Cape Town is known for managing its electricity distribution efficiently, often proposing lower increases than other metros.
| Detail | Information |
|---|---|
| Tariff Structure | Inclining blocks (first 600 kWh at lower rate) |
| Rate per kWh (first block) | Approximately R3.91 (incl. VAT) |
| Rate per kWh (higher blocks) | Approximately R4.65 (incl. VAT) |
| Effective Date | 1 July of the current year |
What R100 buys you: Approximately 25.6 kWh (first purchase of the month)
City of Johannesburg (City Power)
City Power customers pay both a per-kWh energy charge and a monthly service/network capacity charge of approximately R200 per month, which is not included in the per-unit price.
| Detail | Information |
|---|---|
| Tariff Structure | Inclining blocks |
| Rate per kWh (first 350 kWh) | Approximately R3.06 (incl. VAT) |
| Rate per kWh (higher blocks) | Up to R4.00 (incl. VAT) |
| Effective Date | 1 July of the current year |
What R100 buys you: Approximately 32.7 kWh (first purchase of the month)
City of Tshwane (Pretoria)
| Detail | Information |
|---|---|
| Tariff Structure | Inclining blocks |
| Rate per kWh (first block) | Approximately R3.42 (incl. VAT) |
| Rate per kWh (higher blocks) | Up to R4.70 (incl. VAT) |
| Effective Date | 1 July of the current year |
What R100 buys you: Approximately 29.2 kWh (first purchase of the month)
eThekwini (Durban)
Durban uses a single flat rate rather than block tariffs, which simplifies understanding your costs.
| Detail | Information |
|---|---|
| Tariff Structure | Flat rate |
| Rate per kWh | Approximately R3.77 (incl. VAT) |
| Effective Date | 1 July of the current year |
What R100 buys you: Approximately 26.5 kWh
Ekurhuleni
| Detail | Information |
|---|---|
| Tariff Structure | Inclining blocks (sharp increase at higher tiers) |
| Rate per kWh (first block) | Approximately R2.97 (incl. VAT) |
| Rate per kWh (highest block) | Up to R11.99 |
| Effective Date | 1 July of the current year |
What R100 buys you: Approximately 33.7 kWh (first purchase of the month)
Summary Table: What R100 Buys You by Provider
The table below shows approximately how many kilowatt-hours (kWh) you can expect to receive when purchasing R100 of prepaid electricity. Note that for municipalities with inclining block tariffs, this assumes this is your first purchase of the billing month.
| Provider / Municipality | Approximate Rate (R/kWh) | Units for R100 (First Purchase) | Tariff Type |
|---|---|---|---|
| Eskom Homelight 20A | R2.71 | 36.9 kWh | Flat rate (best value) |
| Eskom Homelight 60A | R3.44 | 29.1 kWh | Flat rate (higher monthly fee) |
| Ekurhuleni | R2.97 (first block) | 33.7 kWh | Inclining blocks |
| City of Johannesburg | R3.06 (first block) | 32.7 kWh | Inclining blocks + service charge |
| City of Tshwane | R3.42 (first block) | 29.2 kWh | Inclining blocks |
| eThekwini (Durban) | R3.77 | 26.5 kWh | Flat rate |
| City of Cape Town | R3.91 (first block) | 25.6 kWh | Inclining blocks (600 kWh lower tier) |
All rates include 15% VAT.
Tips for Maximising Your Prepaid Electricity
Understanding how block tariffs work allows you to make smarter purchasing decisions.
Buy Larger Amounts Less Frequently
If you buy R100 five times a month, your later purchases will fall into higher blocks. Instead, buy R500 once at the beginning of the month. More of that R500 will be priced at the cheaper Block 1 and Block 2 rates before you move into higher blocks.
Time Your Purchases Strategically
Your consumption counter resets to zero at the beginning of each billing month (usually the 1st). The best time to buy electricity is on the 1st or 2nd of the month when your cumulative usage is lowest.
Be Aware of Winter Months
During winter, you naturally use more electricity for heating. This pushes you into higher blocks faster. Consider buying a larger amount at the start of winter months to keep more units in the lower-priced blocks.
Check If You Pay a Fixed Monthly Fee
Many municipalities charge a fixed service or network charge on top of the per-unit cost. For City of Johannesburg customers, this adds approximately R200 per month regardless of usage. This fee is usually deducted from your first purchase of the month, meaning your R100 will buy even fewer units if you have not yet paid the service fee.
Frequently Asked Questions
Q: Why does my R100 sometimes buy fewer units than last month?
A: If your municipality uses inclining block tariffs and you have already purchased electricity earlier in the same month, subsequent purchases will fall into higher-priced blocks. To maximise the number of units you receive, purchase larger amounts less frequently rather than making many small purchases.
Q: What is an Inclining Block Tariff (IBT)?
A: An IBT means that the price per kilowatt-hour increases the more you purchase within a single billing month. The first block (e.g., 0-350 kWh) is the cheapest. Once you exceed that threshold, you move into a higher-priced block. This structure is designed to encourage electricity conservation by making heavy usage more expensive.
Q: Do all municipalities use block tariffs?
A: No. Some municipalities (like eThekwini/Durban) use a flat rate where every unit costs the same regardless of how much you buy. Others (like Ekurhuleni) have very steep increases in higher blocks to discourage high consumption.
Q: When do electricity tariffs increase each year?
A: Eskom direct customers see increases on 1 April each year. Municipal customers see increases on 1 July each year, following the approval of municipal budgets.
Q: Do prepaid electricity tokens expire?
A: Under Eskom’s new “Easy Electricity” purchasing mechanism, prepaid tokens purchased through this system do not expire. However, traditional tokens purchased through existing channels may still have expiry periods. Check with your provider.
Q: Are there additional charges besides the per-kWh rate?
A: Yes. Many municipalities charge a fixed monthly service fee, network capacity charge, or availability charge on top of the per-unit energy charge. For City of Johannesburg customers, this can add approximately R200 per month to your bill regardless of how much electricity you use.
Q: How can I find my exact local tariff?
A: The most accurate way is to check your municipality’s website for its annual tariff booklet or budget documentation. You can also ask at your local municipal pay point or consult your most recent electricity purchase receipt, which often shows the applicable rate.
Q: Why did Eskom move to a flat rate?
A: Eskom restructured its Homelight tariff to simplify billing for customers. The flat rate means that every unit costs the same regardless of monthly consumption, removing the complexity of block tariffs for direct Eskom customers.
Q: Does load shedding affect my prepaid electricity balance?
A: No. Load shedding does not reduce your prepaid balance. The units remain on your meter. However, you cannot use them during outages, and you cannot purchase or load new tokens while the power is off.
Q: Can I get a refund for electricity lost during load shedding?
A: No. Municipalities and Eskom do not refund prepaid electricity for load shedding outages. You are paying for access to electricity, and the units remain available once power is restored. This is a key difference between prepaid and conventional billing.
Conclusion
Prepaid electricity rates in South Africa vary widely, from Eskom’s flat rate of approximately R2.71 per kWh for Homelight 20A customers to over R4.00 per kWh in higher consumption blocks in some municipalities. Understanding inclining block tariffs is essential: the more you buy in a single month, the higher your price per unit becomes. By purchasing larger amounts less frequently and timing your purchases for the start of the billing month, you can keep more of your electricity in the cheaper blocks.
Load shedding adds another layer of complexity, requiring households to keep a buffer of units, stage their usage wisely, and protect appliances from surge damage. For the most accurate and up-to-date information, always consult your local municipality’s official tariff schedule.
Disclaimer: All rates are subject to change based on NERSA approvals and municipal budget decisions. Figures presented are based on the most recent available data for the current financial year. Always verify current rates with your electricity provider before budgeting.