How to Switch Energy Supplier in the UK: 2026 Guide

Switching energy suppliers in the UK takes about 10 minutes online and saves the average household £150–£300 a year in 2026. Here's the exact step-by-step process — no jargon.

Why switching matters again in 2026

For a few years after the energy crisis, switching barely paid off — almost everyone was on the price cap. In 2026, fixed deals are back below the cap by 5–12%, which means most households can save £150–£300 a year by switching, and even more if you're still on a Standard Variable Tariff (SVT).

What you need before you start

It takes about 10 minutes online if you have:

- A recent bill or annual statement (or your online account). - Your postcode. - Your annual usage in kWh for gas and electricity (look for "kWh used" on the bill). - Your bank details (most fixed deals require Direct Debit). - Meter type — standard, Economy 7, prepayment, or smart.

If you can't find your annual usage, comparison sites will estimate from property size — but real numbers give a much more accurate quote.

Step-by-step: switching in 2026

1. Check your current deal

Log into your supplier's app or grab your last bill. Look for: - Your tariff name. - Unit rates for gas and electricity (p/kWh). - Standing charges (p/day). - Contract end date and any exit fees.

If you're within 49 days of the end of a fixed deal, no exit fees apply by Ofgem rules.

2. Compare deals

Use a price comparison site or our Bill Calculator to see the best deals for your postcode and usage. Sort by annual cost — not unit rate alone, because standing charges matter.