Compare tariffs using your annual electricity and gas usage in kWh, rather than relying only on your current monthly direct debit. Check both the unit rates and standing charges, along with any fixed-term end date, exit fees and estimated annual cost. Ofgem’s energy price cap limits rates on most default tariffs, but the level varies by region, payment method and usage, and it does not cap every fixed deal. Use a trusted comparison service or Citizens Advice guidance, and check the supplier’s terms before switching.