Electricity Cost Calculator South Africa 2026 (Eskom & Municipal Block Tariffs, Prepaid & kWh Usage)
Calculate your monthly home electricity bill across Eskom, City Power Joburg, Cape Town, and eThekwini in ZAR. Accurately factors in NERSA Incline Block Tariffs (IBT), stepped kilowatt-hour tiers, and 15% VAT.
Electricity Cost Calculator South Africa
Methodology
Calculates monthly residential electricity accounts according to official 2024/2025 and 2026 NERSA-approved Incline Block Tariff (IBT) structures. Models consumption tiers for Eskom Homelight (0–350 kWh Block 1 vs >350 kWh Block 2), City Power Johannesburg, City of Cape Town Home User, and eThekwini Municipality. Applies municipal fixed capacity/network availability surcharges and 15% South African VAT.
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User-provided inputs
This calculator uses only the values you enter. It does not automatically apply tax law, statutory deductions, lender fees, or live exchange rates.
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Formula basis
The formula is shown openly and no country rate is inserted automatically.
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Your estimate
AfricalHub is an independent private platform not affiliated with any government agency. Calculations are for educational planning only. Verify official filings with the relevant revenue authority or a qualified professional.
2024/2025 NERSA Municipal & Eskom Tariff Structure Overview
| Electricity Authority | Fixed Monthly Charge | Block 1 Rate (Lifeline Tier) | Block 2 / Higher Tier Rate |
|---|---|---|---|
| Eskom Homelight (Prepaid) | R0.00 / month | R2.15 / kWh (0 – 350 kWh) | R3.45 / kWh (> 350 kWh) |
| City Power Johannesburg | R230.00 / month | R2.55 / kWh (0 – 350 kWh) | R2.95 (351–500) & R3.35 (> 500 kWh) |
| City of Cape Town (Home User) | R258.40 / month (~R8.50/day) | R3.15 / kWh (0 – 600 kWh) | R4.25 / kWh (> 600 kWh) |
| eThekwini Durban Electricity | R125.00 / month | R2.48 / kWh (0 – 350 kWh) | R2.98 / kWh (> 350 kWh) |
Sources
User-provided inputs
This calculator uses only the values you enter. It does not automatically apply tax law, statutory deductions, lender fees, or live exchange rates.
Frequently asked questions
How do Incline Block Tariffs (IBT) work in South Africa?
Under NERSA Incline Block Tariffs, the price you pay per kilowatt-hour (kWh) increases as you consume more electricity during the calendar month. The first block (e.g. 0 to 350 kWh) is charged at a lower subsidized rate, while subsequent units in higher blocks cost significantly more per kWh to encourage energy conservation.
What is the average monthly electricity consumption for a South African home?
A small apartment typically uses 250 to 400 kWh per month. An average 3-bedroom family home with an electric geyser uses 600 to 900 kWh per month, while large houses with swimming pool pumps and air conditioning can exceed 1,200 kWh per month.
Is electricity cheaper on prepaid meters compared to postpaid billing in South Africa?
Unit energy rates (per kWh) are generally identical within the same tariff class. However, prepaid meters often avoid monthly administrative account and meter reading fees, though some municipalities (like City Power) now levy monthly service surcharges on prepaid users.