How it is calculated
Energy = Σ band kWh × band price. Fixed cost = days × (daily charge + contracted kW × price per kW per day). Other charges are added, then percentage tax on the sum. Sensitivity changes consumption only.
Total cost = (Σ kWh × Price + Fixed cost + Other costs) × (1 + Manually entered tax/100)
Hypothetical example; enter your own prices. Currencies are not converted.
A: 150 × 0.20 + 100 × 0.15 + 30 × (0.10 + 4 × 0.10) = 60; B = 57.60
Assumptions and limits
Every tariff must price the same bands. kW measures power, kWh energy. Unentered commercial charges and current prices are not included. Tax is a simplified percentage on each subtotal, not a universal tariff rule.
Questions about this tool
Why can the cheapest tariff change with consumption?
Use the same consumption bands and billing days for every offer. Power in kW affects fixed charges; energy in kWh affects variable charges. The cheapest offer can change as consumption changes.