See Your Energy Bill Before It Arrives

Suppliers estimate your usage between meter reads based on historical data or assumptions. These estimates are often inaccurate — you might use less (overpaying) or more (facing a nasty catch-up bill). Our calculator uses your actual meter reads and rates, so you see precisely what you owe — no guesswork involved.

Yes. Economy 7 electricity has different day and night rates. You'll need to enter your day usage (kWh) and night usage (kWh) separately, along with their respective rates. Our calculator handles the split automatically and shows you exactly how much you pay for each period.

Most UK suppliers use metric (m³) for gas meters. Check your bill or meter — if it shows m³, you're metric. If it shows ft³, you're imperial. Our calculator handles the conversion automatically — just select your meter type and enter your reading. We'll convert it correctly and calculate your charges.

Most businesses pay 20% VAT on energy. However, some charities, community organisations, and certain sectors qualify for 5% VAT. Check your bill — it'll show the VAT rate applied. If you're unsure, 20% is the standard. Our calculator lets you select the correct rate for your situation.

CCL (Climate Change Levy) is a tax on energy use. Most businesses pay it, but some are exempt (e.g., renewable energy users or certain industries). Check your bill — if you see a CCL line item, include it in our calculator. If you're exempt, leave it at 0. Our calculator shows CCL separately so you can see its impact on your bill.

Your meter readings are on the dials of your physical meter. For electricity, read the numbers left to right (ignore the red dial). For gas, read the first 5 dials left to right (ignore the decimal). Your supplier's bill also shows previous readings — compare the numbers to verify. If you're not sure, take a photo of your meter display and we can help.

No. We don't store your meter reads, rates, or calculated bills unless you explicitly submit them to us for a quote or consultation. Your data stays private while you're calculating. If you choose to submit your information, we use it only to provide energy quotes and follow-up support.

Yes, but you'll need to calculate each site separately since each has its own meter, rates, and consumption. Simply enter the details for one site, get your bill, then repeat for the next. It takes a couple of minutes per site. For businesses managing many sites, we offer consultancy support — get in touch.

Your supplier's bill shows your unit rates (pence per kWh or pence per unit of gas) and your standing charge (daily fee). If you can't find them, contact your supplier directly or get a copy of your contract. You can also upload your latest bill for a free sanity-check — we'll review it and help you extract the right numbers.

Our calculator is designed to be as accurate as possible. It mirrors how suppliers calculate bills — usage × rate + standing charge + VAT + CCL. However, some suppliers apply adjustments or specific terms your supplier might use. The result should be very close to your actual bill. If there's a significant difference, we recommend getting a bill review — we offer free checks.