Calculate 49 Days Before Your Fixed Tariff Ends

If you have heard about the 49-day rule and would like to work out when you can leave your fixed-rate energy tariff for free, then we have a couple of tools to help you.

All you will need to know is the end date of your tariff.

Many people choose to join a tariff a the end of the month, meaning your end date is likely to be the end of the month too.

If this is the case, then you can quickly use our table below to work out 49 days before the last day of each month:

Your tariff end date49 days before your tariff ends is
October 31stDecember 13th
February 28thJanuary 10th
February 29thJanuary 11th
March 31st (not a leap year)February 10th
March 31st (leap year)February 11th
April 30thMarch 12th
May 31stApril 12th
June 30thMay 12th
July 31stJune 12th
August 31stJuly 13th
September 30thAugust 12th
October 31stSeptember 12th
November 30thOctober 12th
December 31thNovember 12th

If your tariff end date is not the last date of the month, then we have created a really simple calculator to work out when you can leave your fixed rate tariff for free. Just input your end date below:


Hi, I'm Rob and I run I initially started this project 5 years ago 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 spent have 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.

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