EPC explained (2026)
What your Energy Performance Certificate means, how to improve it, and how a more efficient home cuts your bills.
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Your EPC affects your bill — see what your home costs to run
An EPC tells you how efficiently your home uses energy, but not what you are paying for it. Enter your postcode to see what your home would cost on today’s cheapest tariffs.
Free, whole-of-market and takes about two minutes. We only use your postcode to find your property.
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What an EPC tells you
An Energy Performance Certificate rates your home from A (most efficient) to G (least), with an estimate of running costs and tailored improvement recommendations. Most UK homes sit around D; C or above is considered good.
A better rating means you use less energy for the same comfort. Combined with a competitive tariff, it is one of the most effective ways to cut bills - especially with the current cap rise. Compare deals while you plan improvements.
Ways to improve your EPC
Insulation
Loft and cavity wall insulation and draught-proofing are usually the cheapest, highest-impact fixes.
Heating & lighting
An efficient boiler or heat pump and LED lighting lift your rating and cut running costs.
Solar & battery
Generating your own power improves the rating and offsets pricier grid electricity.
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FAQs
A is best, G worst; C or above is good. Many UK homes are at D - a higher rating means lower energy use and bills.
Insulation, draught-proofing, LED lighting, an efficient boiler or heat pump, and solar - your EPC lists tailored recommendations.
Indirectly - an efficient home uses fewer units. With the cap up 13% from July, efficiency plus a competitive tariff saves the most.
Cut bills while you upgrade
Compare a competitive tariff to pair with your efficiency improvements.
No obligation. Reviewed 5 July 2026.
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