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Compare two energy quotes side by side
A lower unit rate isn't always cheaper. Enter two quotes and your usage to see which costs less over a year and over the whole contract, and the usage at which they break even.
Why the cheapest unit rate can cost more
Every business energy quote has two prices: a unit rate for each kWh and a standing charge for each day. A quote with a low unit rate often carries a higher standing charge, and the other way round. Which is cheaper depends entirely on how much energy you use.
For a small site that uses little energy, the standing charge can be most of the bill. For a busy site, the unit rate dominates. That's why comparing the total annual cost at your real usage is the only fair comparison. Read our guide to unit rates and standing charges.
FAQs
Is a lower unit rate or a lower standing charge better?
It depends on how much you use. High users usually save more with a lower unit rate; low users often save more with a lower standing charge. The break-even usage shows the point where the two quotes cost the same.
How is the break-even usage worked out?
Break-even kWh = (difference in annual standing charges) ÷ (difference in unit rates). Below that usage the quote with the lower standing charge is cheaper; above it the quote with the lower unit rate wins.
Should I include the broker fee?
Broker commission is usually built into the unit rate or standing charge you are quoted, so comparing the quoted rates already includes it. Since October 2024 suppliers must show broker fees in the contract terms.