49 Day Rule Calculator
Contents
If you are on a fixed rate energy tariff with exit fees, you can switch supplier for free if your tariff ends within 49 days. Use our calculator below to find out the earliest date you can leave your fixed rate tariff for free — all you need is your tariff end date.
Use our referral link, and we'll both get £50 credit once your switch is complete.
Existing customer? Find out how you can benefit too. T&Cs apply (only one switching offer per household)
Month-end tariff dates
| Your tariff end date | 49 days before your tariff ends is |
|---|---|
| 31 January | 13 December |
| 28 February (non-leap year) | 10 January |
| 29 February (leap year) | 11 January |
| 31 March (non-leap year) | 10 February |
| 31 March (leap year) | 11 February |
| 30 April | 12 March |
| 31 May | 12 April |
| 30 June | 12 May |
| 31 July | 12 June |
| 31 August | 13 July |
| 30 September | 12 August |
| 31 October | 12 September |
| 30 November | 12 October |
| 31 December | 12 November |
Enter a valid tariff end date.
Frequently asked questions
What is the 49 day rule for energy tariffs?
The 49 day rule means you can switch energy supplier without paying exit fees if your fixed rate tariff ends within the next 49 days. This gives you time to find and switch to a better deal before your tariff expires.
Do I have to pay exit fees to leave my energy tariff?
If your fixed rate tariff ends within 49 days, you can switch for free. If you switch before the 49 day window, your supplier may charge exit fees, typically £25-£50 per fuel type.
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Written by
Rob Gibbs
Hi, I'm Rob, and I run Energy-Review.co.uk. I initially started this project in 2018 when I was looking to switch energy suppliers and found there wasn't a website that provided simple, data-backed reviews on all the suppliers available. Since then, I have spent a lot of time (too much, some may say!) looking at all publicly available data about each supplier and writing reviews using this information. These reviews are updated as regularly as possible, and any data is backed up by a source where necessary. I have also started writing guides on various energy-related topics, which hopefully you will find useful. If you find any issues, please use our contact form to let us know.