Direct Debit Increase Complaint Template
Use this when the monthly payment has jumped and the supplier has not clearly explained the forecast, credit, debt recovery, buffer or review period.
Use together
Use this template when
Your supplier has increased your monthly payment and you want the calculation explained before you accept it. Keep the request narrow: forecast, balance, credit/debt, buffer and review period.
Copy and adapt this direct debit complaint
Account number: [account number]
I am writing about the proposed direct debit increase from £[old amount] to £[new amount].
Please provide a written breakdown showing:
1. the annual usage forecast used;
2. my current account balance and whether it is credit or debt;
3. any debt recovery amount included;
4. any buffer you are holding and why;
5. the number of months used to smooth the balance;
6. the next review date.
Based on my latest bills and readings, the proposed amount appears too high. Please review the payment and confirm whether a lower amount of £[your suggested amount] would keep the account on track.
If you refuse to reduce it, please explain the calculation in enough detail for me to check it.
Attach this evidence
Latest bill PDF
Shows the current charges and balance.
Latest meter reading
Prevents the supplier relying only on stale estimates.
Account balance screenshot
Shows credit or debt before the increase.
Your calculator result
Shows the amount you believe is fair and why.
The letter that gets an actual calculation back
Copy, fill in the brackets, send by email or the complaints form
The part that does the work is the paragraph with your own numbers in it. A request for an explanation can be answered with reassurance. A request that puts a rival calculation on the table has to be answered with arithmetic.
The five questions, and what each answer tells you
| Ask | Good answer | Answer that means you have found the problem |
|---|---|---|
| What annual usage forecast did you use, in kWh? | A kWh figure close to your actual last 12 months. | A figure well above your actual usage, or one based on estimated reads, or no figure at all. |
| What is my current balance, and is it credit or debt? | A number that matches your account screen. | A balance that does not match, or one that ignores a recent payment. |
| How much of the monthly amount is debt recovery? | A stated amount and a stated recovery period. | “None” — when the payment is far above your forecast ÷ 12. |
| What buffer are you holding, and why that amount? | A modest figure tied to your winter forecast. | A large unexplained cushion, or a buffer being rebuilt while you are already in credit. |
| Over how many months are you smoothing this? | 12 months, or a stated shorter recovery period. | Six months — which doubles the payment and is often the real cause of a sudden jump. |
That last row catches a surprising number of cases. A supplier recovering a £600 shortfall over six months rather than twelve adds £50 a month, and nothing on the account screen says so.
How a fair direct debit is actually calculated
A direct debit is not the bill. It is a payment plan designed so that your account lands near zero at the end of the year, having carried you through a winter that costs far more than a summer. That means five numbers, not one:
monthly = ( forecast annual cost − current credit + debt being recovered + target buffer ) ÷ months
Every argument about a direct debit is an argument about one of those five terms. Working out which one is the problem is most of the job.
Worked from the Ofgem cap, July–September 2026
This example uses 2,700 kWh electricity and 11,500 kWh gas at July–September 2026 average rates for 365 days. These are older consumption assumptions; the revised Ofgem typical-use headline was £1,663. Use your own usage, balance and current tariff for a payment check.
| Line | Calculation | Cost |
|---|---|---|
| Electricity units | 2,700 × 26.11p | £704.97 |
| Electricity standing charge | 365 × 57.19p | £208.74 |
| Gas units | 11,500 × 7.33p | £842.95 |
| Gas standing charge | 365 × 29.04p | £106.00 |
| Forecast annual cost | £1,862.66 | |
| Monthly, no debt, no buffer | £1,862.66 ÷ 12 | £155.22 |
So for this illustrated dual-fuel household at July–September 2026 rates, with a zero balance, roughly £155 a month is the honest number. If your usage is typical, your balance is around zero, and the supplier is asking for £230, then four hundred pounds a year is going somewhere — into a forecast that assumes higher usage, into debt recovery, or into a buffer. They should be able to say which.
Standing charges are 17% of that bill. £314.74 a year before a single unit is used. That is why “I barely use anything, why is it so high” usually has an answer, and why cutting usage moves the number less than people expect. See standing charges explained.
Cap rates shown are averages for direct debit customers in England, Scotland and Wales, including VAT, for 1 July to 30 September 2026. Your region and payment method change them — use the rates on your own bill with the direct debit calculator.
Frequently asked questions
Should I mention the price cap?
Only if the supplier’s forecast depends on current rates. Remember the price cap is not a cap on your total bill.
Can I ask for a refund and direct debit reduction together?
Yes, but separate the two requests clearly: refund of excess credit and review of future monthly payments.
What if the supplier ignores the request?
Keep the message and response dates. If the complaint remains unresolved, use the supplier complaint and Ombudsman route.
When should I send this?
As soon as the increase is notified and before it takes effect. Suppliers hold a pending change far more readily than they reverse one that has already been collected.
What if I have already paid the higher amount once?
Send it anyway. Ask for the calculation, and if the payment is reduced on review, ask for the overpayment to be refunded rather than left on the account as credit.
Do I need to include my own figures?
It is the part that works. A request for an explanation gets an explanation-shaped reply; a request that puts your kWh, your rates and your own monthly figure on the table has to be answered with arithmetic.
Official sources used for this page
BillDecoded translates official process and billing information into practical checks. It is not affiliated with the Ombudsman, Ofgem, Citizens Advice, Which? or any supplier.