A sudden jump in your direct debit can be worrying. This tool looks at the size of the increase, whether your fixed deal ended recently, and your household size to suggest the most likely reasons. The explanations are factual and don't promise specific savings—they help you understand what might be going on so you can check your statement or speak to your supplier with more confidence.
Bill shock explainer
See why your direct debit might have gone up and get a simple explanation of the most likely causes.
Frequently asked questions
- Why did my direct debit go up after my fixed deal ended?
- When a fixed tariff ends, suppliers usually move you onto their standard variable rate, which is often higher. Your direct debit is then recalculated to reflect the new unit rates and standing charges, so a rise is common.
- Can my supplier increase my direct debit for underpayment?
- Yes. If your usage was higher than the amount you were paying (e.g. over winter), the supplier may spread the shortfall over the next 12 months. That can lead to a noticeable increase even if rates haven't changed.
- What can I do if I can't afford the new direct debit?
- Contact your supplier as soon as you can. They can discuss a payment plan or a more affordable amount. If you're out of contract, you can also compare other tariffs to see if there are cheaper options for your situation.
- Will my direct debit go down again in summer?
- It might, if your supplier reviews it and your usage drops. Many suppliers review direct debits periodically. You can also ask for a review if you think the amount no longer matches your usage.
- How accurate is the "likely reasons" list?
- The tool picks reasons that commonly apply based on your answers. It can't see your actual account, so use it as a guide. Your statement or an explanation from your supplier will give you the exact causes.
- Does household size really affect my bill?
- Larger households often use more energy, especially in winter. Big percentage increases can sometimes reflect a reassessment of your annual usage, which may be influenced by the number of people in the home.
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