One unit consumed is the same as one kilowatt hour (KWH).
Prices quoted here are off of the 2020/2021 Ekurhuleni Tariff Table
Prices quoted here all include vat for your convenience
Priced quoted on the Ekurhuleni web site exclude Vat

The short version

With post-paid, you use electricity and you pay for your usage at the end of the month, or thereabouts.
With pre-paid, you pay-as-you-go.
The tariffs are the same in each payment scheme.

The longer version

There are two different tariffs and they are applied in a similar way.

Tariff A (Post-paid and Pre-paid)

The cost per electrical unit will increase as more electricity is consumed.
This tariff will suit low usage customers.
This tariff does not charge a fee for the first 100 units consumed.

Between 100 units, and 600 units, you will pay
R1.5836 per unit (R1.58).
Between 600 and 700 units you will pay
R2.6917 per unit (R2.69).
Above 700 units you will pay
R7.5634 per unit (R7.56).

These prices include 15% Vat

Tariff B (Post-paid and Pre-paid)

The cost of electricity in tariff B does not increase with usage.
This tariff will suit users who use more that 600 units in one month.
There are no free units available in tariff B.

The cost is R2.34 per unit no matter the consumption.

These prices include 15% Vat

Additional Charge
(Post-paid and Pre-paid)

• Post-paid and pre-paid fixed charges differ.
• On post-paid there is a fixed monthly charge of R46.62 per month per point of supply.
  Your monthly account includes this charge.
• On pre-paid there is a fixed monthly charge of R23.00.
  Your initial purchase each month will include these charges.

  These prices include 15% Vat