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What’s the difference between a fixed and variable tariff?

Fixed tariff

Your unit rates and standing charges remain fixed for a predefined period of time. This is typically for a year. 

This doesn’t mean the amount you’ll pay is fixed – it depends on the amount of energy you use. 

Fixed energy tariffs are available to customers who take two or more eligible services with us.*

Variable tariff

The cost you pay for your energy can go up and down in line with wholesale costs. We’ll always give you 30 days’ notice of any price changes. 

You can find more information about other tariffs on this

*Fixed tariff only available to eligible customers who take two or more bundle services (bundle services are energy, broadband, mobile, insurance - excluding Bill Protector). Smart meter required. Full details, eligibility and terms available at

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