No, a fixed price tariff means you guarantee your tariff rates, which is the price you pay in standing charge and per kWh for your energy. These rates are set for the full length of your tariff.
Your monthly Direct Debit is calculated using your personal projection, which is the amount of energy we think you’ll use over 12 months.
If you pay by monthly Direct Debit you’ll be paying a set amount each month, but this can change depending on your changing energy usage. It doesn’t mean your tariff rates have changed, just how much energy you’re using.