Before we know it the cold winter months will be upon us and we will be cranking up our heating.

To check whether you're on the best plan for your household, go to www.whatsmynumber.org.nz, complete all the fields and submit.

What's My Number is an initiative of the Electricity Authority working with Consumer NZ to help New Zealanders make more informed choices about our electricity suppliers.

The site provides information about the ability to switch power companies, the ease of switching and the potential savings you can make on your power bills by switching energy providers.