No mystery maths
Why you can trust the numbers
Anyone can put a big saving on a website. Here's exactly where our figures come from, who keeps the energy companies honest, and what happens to your details when you switch through us.
Where our prices come from
Every unit rate and standing charge on this site comes from published sources: supplier tariffs and the Consumer Council for Northern Ireland's price comparison tables in Northern Ireland, supplier price lists in the Republic of Ireland, and the Ofgem price cap in England, Scotland and Wales. We don't estimate prices and we don't average them into something vague.
Each deal carries the date we last checked it against its source — our Northern Ireland rate book was last verified 16 August 2026, and our Ofgem cap figures on 23 August 2026. If a supplier changes a price after that date, the old figure stays visible with its date until we've checked the new one, rather than quietly changing under you.
See every price we holdWho regulates energy here
- Northern Ireland: the Utility Regulator sets the rules for suppliers and regulates Power NI's household electricity tariff and Firmus Energy's regulated gas tariff in the Greater Belfast network.
- Consumer advice and complaints: the Consumer Council for Northern Ireland handles energy complaints once a supplier's own process hasn't sorted it.
- England, Scotland & Wales: Ofgem licenses suppliers and sets the price cap that every standard variable tariff sits at, reviewed every three months. Complaints that a supplier hasn't resolved in eight weeks go to the Energy Ombudsman, and Citizens Advice runs the consumer helpline.
- Republic of Ireland: the Commission for Regulation of Utilities (CRU) regulates suppliers, with complaints going to the CRU's customer care team.
We're none of these bodies. We're a comparison service — we compare energy deals, we don't supply them.
Who your contract is with
When you finish a switch here, your energy contract is with the supplier you picked, not with us. Their terms, their bills, their customer service. What we do is check your details read right and pass them over so nothing gets lost in the post.
You've 14 days to change your mind on any switch agreed online. Cancel it from your account and we'll stop it — no questions, no charge.
Switch terms version cf-switch-terms-2026-08. We record which version you agreed to, so there's never an argument about what you signed up to.
What we do with your details
- Compare without giving us anything but a postcode. No account needed.
- We only pass your details to a supplier when you've ticked the box saying we can, for the deal you chose.
- We never sell your details on, and we don't ring you out of the blue to sell things.
- Ask us and we'll tell you everything we hold about you, or delete it. That's your right, not a favour.
Your supply never gets interrupted
Switching supplier changes who bills you, not how the electricity or gas reaches your house. Nobody calls out, nothing gets dug up, and there's no day without power. The wires and pipes are run by the network operator either way.
If we get it wrong
Tell us. Use the help centre or ask Bully and we'll look at the actual maths with you. If our figure was wrong, we fix the rate book so nobody else gets the same wrong answer.
Right then. Let's see what you're owed.
Compare billsBully can handle the boring bits
Your details go into the supplier's real form and nowhere else. You still press send — Bully just spares you the typing.
What Bully does, exactly →