How much electricity R1k, R2k will buy you in SA’s biggest metros

An increase of 31% in fixed charges levied by Johannesburg’s City Power for electricity over the last two years means that postpaid (credit) customers now don’t even get 100 kilowatt hours (kWh) of usage for R1 000. Less than 100kWh is an astonishingly low amount.

The two fixed monthly charges – a network charge and capacity charge – totalled R631.16 including value-added tax (Vat) per month in 2019/20. Today, they total R825.32. This is charged by the metro’s utility regardless of how much electricity is consumed.

An analysis by Moneyweb in 2019 revealed that Joburg residents who are serviced by City Power and are not on prepaid continued to pay the most for electricity among the country’s major metros.

Electricity: Who pays what [2019]
Electricity: Who pays more? [2021]

But comparing the cost of power at just R1 000 in spending is not entirely fair.

Comparing the amount of electricity received for R2 000 removes the distortion of those high fixed charges somewhat.

At that level, customers in Joburg receive about the same amount of electricity as those in eThekwini.

This is due to the latter’s high price per kWh on its basic tariff plan (rates on time-of-use plans that require smart meters are more reasonable). At these more elevated levels of usage, eThekwini tariffs are as pricey as City Power’s.

Apples-with-apples comparison all but impossible

The way tariffs are designed across the various metros differs greatly:

  • Some have fixed charges, others don’t;
  • Some have flat-rated tariffs regardless of usage;
  • Those that charge different rates depending on levels of usage (so-called inclining block tariffs) don’t all use the same sized blocks;
  • Tshwane used to bill seasonally with different rates for summer and winter, but this has changed since 2019; and
  • Eskom is included, as sizeable areas in Joburg (Sandton and Soweto) are supplied directly by the utility.

Rather than attempt to compare the base tariff, in other words the cents per kWh rate, the methodology used here is to calculate how much electricity a household will receive for two amounts: R1 000 and R2 000.

Again, as pointed out in 2019, this is the lived experience of customers.

Importantly, fixed charges on some tariff structures distort matters, making a simple comparison between the rates per kWh meaningless. This methodology removes this distortion.

Amount of electricity households receive (2021/22)

Tariff R1 000 R2 000
Eskom Homepower 4 440kWh 862kWh
Eskom Homelight 548kWh 892kWh
Cape Town Domestic1 367kWh 710kWh
Cape Town Home User2 335kWh 710kWh
City of Joburg City Power prepaid 491kWh 884kWh
City of Joburg City Power residential 93kWh 606kWh
Ekurhuleni Tariff A (prepaid/credit) 548kWh 768kWh
Ekurhuleni Tariff B (prepaid/credit) 349kWh 722kWh
eThekwini 238kWh 607kWh
Tshwane 395kWh 877kWh
* All kWh amounts rounded down
* All amounts include Vat
* Excludes indigent households
1 For houses valued at more than R400 000 but less than R1 million
2 For houses valued at more than R1 million

The situation in Joburg is bizarre and increasingly untenable: postpaid/credit customers pay among the most for electricity across metros, while prepaid customers pay among the least.

For R2 000 in spend, Joburg postpaid customers receive more than 30% less electricity because of the fixed charges.

The municipality has repeatedly attempted to introduce a R200 (R230 including Vat) monthly surcharge for prepaid customers, but continues to U-turn on the proposals.

Read: Third time unlucky? CoJ prepaid customers in for tariff surprise

Until it implements some sort of fixed monthly charge, City Power prepaid customers will continue to enjoy among the cheapest electricity across the metros.

Effectively, these customers are being subsidised by City Power’s postpaid ones.

Two-year snapshot

A further analysis by Moneyweb reveals how tariff changes over the past two years have affected how much electricity you will get for the same amount of money.

It’s not as simple as assuming that two back-to-back annual increases of around 15% would result in 30% less electricity for the same amount of money.

Metros seldom keep tariff structures the same for long periods of time. Changes are made to methods of charging (block sizes in incline block tariffs are changed, fixed charges are implemented or removed, and so on).

From this comparison, the biggest declines in the amount of electricity received are for City of Joburg postpaid and eThekwini (Durban) customers. It is no surprise that tariffs for these two groups are the highest among the metros.

How much less bang you’re getting for your buck

Tariff R1 000 2019/20 R1 000 2021/22 Change
Eskom Homepower 4 571kWh 440kWh -23%
Eskom Homelight 651kWh 548kWh -16%
Cape Town Domestic1 436kWh 367kWh -16%
Cape Town Home User2 414kWh 335kWh -19%
City of Joburg City Power prepaid 575kWh 491kWh -15%
City of Joburg City Power residential 239kWh 93kWh -61%
Ekurhuleni Tariff A (prepaid/credit) 603kWh 548kWh -9%
Ekurhuleni Tariff B (prepaid/credit) 454kWh/439kWh 349kWh -23%/-20%
eThekwini 359kWh 238kWh -34%
Tshwane 367kWh winter
440kWh summer
395kWh 8%/-10%
* All kWh amounts rounded down
* All amounts include Vat
* Excludes indigent households
1 For houses valued at more than R400 000 but less than R1 million
2 For houses valued at more than R1 million