Compare two energy tariffs
Unit price and standing charge: which tariff is cheapest for your usage?
How it works
Yearly cost = consumption × unit price + standing charge × 12. The break-even is the usage above which the cheaper unit price wins.
Results are for guidance only and do not replace professional advice.
Worked example
With the default values:
- Yearly consumption (kWh)3500
- Tariff A: price per kWh0.29
- Tariff A: standing charge per month8
- Tariff B: price per kWh0.27
- Tariff B: standing charge per month13
you get:
- Cheapest tariffB (saves €10.00/yr)
- Yearly cost tariff A€1,111.00
- Yearly cost tariff B€1,101.00
- Break-even usage3,000 kWh per year
Frequently asked questions
How does the “Compare two energy tariffs” tool work?
Yearly cost = consumption × unit price + standing charge × 12. The break-even is the usage above which the cheaper unit price wins.
What do I need to enter?
Just fill in: yearly consumption, tariff a: price per kwh, tariff a: standing charge per month, tariff b: price per kwh, tariff b: standing charge per month. The result updates as you type.
Can you give an example?
Yearly consumption (kWh): 3500; Tariff A: price per kWh: 0.29; Tariff A: standing charge per month: 8; Tariff B: price per kWh: 0.27; Tariff B: standing charge per month: 13 → Cheapest tariff: B (saves €10.00/yr); Yearly cost tariff A: €1,111.00.
Is this calculator free, and is my data private?
Yes. HOD Calc is completely free with no sign-up. The calculation runs in your browser: nothing you type is sent or stored.