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Free tools · From NERSA’s 2026/27 decision · Northern Cape

How many units for R100 in Siyancuma?

R100 buys 31.3 kWh of prepaid electricity in Siyancuma at the start of the month, VAT included, on Siyancuma’s prepaid tariff for homes, Domestic prepaid, seasonal blocks. There’s no fixed charge, so all of your money buys units. Units cost more as the month goes on: once you’ve bought 350 kWh, R100 buys 26.4 kWh.

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What R50 to R1,000 buys in Siyancuma

Siyancuma has 2 prepaid tariffs for homes that, going by their names, any household can be on. The cheapest for a month of 500 kWh comes first:

Domestic prepaid, seasonal blocks31.3 kWhfor R100 at the start of the month

Units (kWh) for each amount, VAT included. Start of month: your first units of the month. After 350 kWh: once you’ve bought 350 kWh this month.

You payStart of monthAfter 350 kWh
R5015.613.2
R10031.326.4
R20062.652.7
R30093.879.1
R500156.4131.8
R1,000312.8263.5
Units this monthPrice a unitR100 buys
First 350 kWhR3.2031.3 kWh
Above 350 kWhR3.7926.4 kWh

No fixed charge: all of your money buys units. The decision doesn’t say whether its tariffs include VAT; 15% added, as municipal tariffs are usually quoted without it. Source: NERSA decision, page 20.

Domestic prepaid27.1 kWhfor R100 at the start of the month

Units (kWh) for each amount, VAT included. Start of month: your first units of the month. After 350 kWh: once you’ve bought 350 kWh this month.

You payStart of monthAfter 350 kWh
R5013.511.4
R10027.122.8
R20054.245.5
R30081.368.3
R500135.4113.8
R1,000270.9227.6
Units this monthPrice a unitR100 buys
First 350 kWhR3.6927.1 kWh
Above 350 kWhR4.3922.8 kWh

No fixed charge: all of your money buys units. The decision doesn’t say whether its tariffs include VAT; 15% added, as municipal tariffs are usually quoted without it. Source: NERSA decision, page 20.

Why the same R100 buys less later in the month

On this tariff, Siyancuma sells electricity in blocks that start again on the first of every month. The first 350 kWh each month cost R3.20 a unit, VAT included, and R3.79 a unit above 350 kWh.

So R100 buys 31.3 kWh at the start of the month, but only 26.4 kWh once you’ve bought 350 kWh that month. Splitting your purchases doesn’t change this: the blocks count every unit you buy in the month, however you buy them.

Siyancuma charges more in winter (June to August): then R100 buys 27.6 kWh at the start of the month.

Not worked out from rand alone: Domestic conventional, time of use (time of use: the price depends on the time of day).

Elsewhere in the Northern Cape

Units for R100 at the start of the month, VAT included.

Source: NERSA decision, page 20, Siyancuma’s tariffs for 2026/27, from 1 July 2026. Worked out for November 2026. In parts of most municipalities, Eskom supplies homes directly.

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