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What is the difference between a fixed tariff and a variable tariff?

Updated this week

A Fixed Rate Tariff means the unit rates (price per kWh) and standing charges you pay for gas or electricity stay the same for the length of your contract.

  • This protects you from changes in market prices.

  • However, this doesn't mean your monthly payment amount is fixed — it may go up or down if your actual usage is higher or lower than expected. This ensures your account stays balanced.

A Standard Variable Tariff (SVT) means your unit rates and standing charges can change throughout your contract.

  • These changes are linked to Ofgem’s energy price cap, which is reviewed every 3 months.

  • If the cap goes up or down, your rates change too, so your bills may vary.

At Bunch we offer a variety of tariffs including fixed, variable, and unlimited tariffs, which you can choose to include in your package. The majority of our tariffs have fixed unit rates that remain the same for your 12-month contract.


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