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Energy

When is the right time to switch energy supplier?

Timing matters with energy. Switch at the right moment and you can avoid exit fees and lock in a better price. Here's what to look out for.

Last updated: November 2026

This guide covers England, Scotland and Wales, where Ofgem regulates energy. Northern Ireland has different rules.

Good times to look at switching

1. When your fixed deal is ending

If you're on a fixed tariff, you can switch without paying an exit fee in the last 49 days of your deal. Your supplier will contact you before it ends. If you do nothing, you'll usually move onto a standard variable (default) tariff, which may cost more.

2. When you're on a standard variable tariff

Standard variable tariffs have no exit fees, so you can switch at any time. Their prices are limited by Ofgem's price cap, which changes every three months: on 1 January, 1 April, 1 July and 1 October. Ofgem announces each new level a few weeks before it starts, so that's a good time to compare. If prices are expected to rise, a fixed deal could protect you. If they're expected to fall, staying variable could work out cheaper. Nobody can predict this for certain.

3. When you move home

You'll be on whatever supplier and tariff the previous occupier had, often a variable tariff. Take meter readings on the day you move in, then compare deals.

Fixed or variable?

  • Fixed: your unit rates and standing charges stay the same for the length of the deal. You get certainty, but there may be exit fees if you leave early.
  • Variable: prices can go up or down, usually in line with the price cap. You can leave whenever you like, without exit fees.

Always compare the typical yearly cost, which includes standing charges, not just the unit rate.

What happens when you switch

  • Your supply isn't interrupted. Only the company that bills you changes.
  • Your new supplier handles it. They must switch you within 5 working days. If they don't, Ofgem's rules mean they must pay you compensation automatically.
  • You can change your mind. You normally get a 14-day cooling-off period after agreeing a new contract.
  • Give meter readings when you switch, so your final bill from your old supplier and your first bill from the new one are accurate.
  • Check for credit. If your old account is in credit, you should get it back after your final bill.

A simple yearly routine

  1. Put your fixed deal's end date in your calendar, and set a reminder about seven weeks before.
  2. Check the price cap announcement each quarter if you're on a variable tariff.
  3. Keep a recent bill handy. It shows your yearly usage, which you need for accurate comparisons.

Ready to switch?

See our hand-picked deals. Every one shows the reward you'll get, to keep as a shop voucher or donate to charity.

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Sources

This guide is general information, not advice about your personal situation. Rules can change, so check the latest details with your provider or the regulator.