Energy Price Change and Direct Debit Letters (UK 2026)

Timely: The energy price cap is now reviewed every three months, which means most households get four separate price-change letters a year — plus direct debit reviews on top. More letters, more chances for a wrong figure to slip through unchallenged.At a glance

• A price change letter tells you your unit rate or standing charge is changing. A direct debit review tells you your monthly payment is changing. They arrive separately and mean different things.
• Your monthly direct debit can go up even when prices go down — and go down even when prices go up. The two are only loosely connected.
• Suppliers must give you advance notice before increasing a direct debit, and must explain why in a way you can actually understand.
• If your account is in credit, you are allowed to ask for that money back. It is your money, not a deposit.
• The single most useful thing you can do before reading any of it: find a recent meter reading. Almost every dispute comes down to an estimate.
• Not financial advice: This article explains the rules in plain English. For your specific situation, speak to your supplier, MoneyHelper, or Citizens Advice.

There are two letters your energy supplier sends that look nearly identical and do completely different jobs. One says the price of electricity and gas is changing. The other says the amount leaving your bank account each month is changing. People read the first, panic, and assume the second is automatic and unarguable.

It isn't. A direct debit amount is your supplier's prediction of what you'll use over the next twelve months, divided by twelve. Predictions can be wrong. And when they're wrong, they're usually wrong because of a number the supplier guessed rather than measured.

This guide walks through both letters, shows you which figures matter, and explains exactly what you can push back on.

Letter one: the price change notice

This arrives when your tariff's rates move — most commonly because the Ofgem price cap has been recalculated, or because a fixed deal is ending.

What it should tell you

• Your old and new unit rate — the price per kilowatt hour (kWh) of electricity and gas. Usually quoted in pence.
• Your old and new standing charge — a daily fee you pay regardless of how much energy you use, even if you use none at all.
• The date the new rates start.
• An estimated annual cost based on "typical" usage.

That last figure is the one most people fixate on, and it's the least useful. "Typical household" estimates are based on a national average that may bear no resemblance to your home. A one-bedroom flat and a four-bedroom house get quoted from the same assumptions. Ignore it and look at the rates.

The standing charge trap

Standing charges have become a genuine sore point, particularly for low users. If you use very little energy — you're away often, you have solar panels, you heat with something other than gas — the standing charge can be most of your bill. Two tariffs with identical unit rates can cost you very different amounts depending on the daily fee.

When you compare your old rates to your new ones, compare both numbers. A letter announcing a unit rate cut while quietly raising the standing charge is not necessarily good news for you.

What "price cap" does and doesn't mean

The cap does not limit your bill. It limits the rates a supplier can charge on a standard variable tariff. If you use more energy, you pay more — the cap doesn't stop that. The widely reported "average annual bill" figure attached to each cap announcement is an illustration, not a ceiling on what you personally can be charged.

Not sure which figure on the letter actually matters? Upload the letter to Clarify and ask in plain English — "has my standing charge gone up?" or "is this a price change or a direct debit review?" You get an answer that points to the exact line it came from, so you can check it yourself.

Read my letter with Clarify

Letter two: the direct debit review

This is the one worth reading properly, because it's the one where the supplier has made a judgement call.

Suppliers review direct debits periodically — often annually, and after a price change or a significant shift in your usage. The review produces a new monthly figure built from three things:

1. Your expected usage for the next 12 months, usually based on the last 12 months of actual or estimated readings.
2. The new rates.
3. Your current balance — whether you're in credit or in debit right now.

That third element is why a direct debit can jump when prices haven't. If you've been underpaying all winter and you're £200 in debit, the supplier spreads that £200 across the coming months on top of the ongoing cost.

Credit and debit, explained

In credit means you've paid more than you've used. Because most people pay a flat amount year-round but use far more in winter, building up credit over summer is normal and intentional — it's what stops your January payment being enormous.

In debit means you've used more than you've paid for. Also normal in February. Only a persistent debit that keeps growing is a real problem.

So don't panic about either word on its own. What matters is the trend across a full year.

Getting credit back

If you're sitting on a large credit balance, you can ask for it to be refunded. Suppliers can push back if a refund would leave you exposed to a big winter shortfall, and that's often a fair point — but it's a conversation, not a refusal you have to accept silently. If you're in credit in October, leaving it there is usually sensible. If you're in credit in April after a full winter, that's a stronger case for a refund.

The three things worth checking before you accept a new figure

1. Is the usage estimated or actual?

Look for the letter E next to a reading, or wording like "estimated". If your supplier has been guessing for months, the whole calculation is built on a guess. Submit a real reading and ask for the review to be redone. This is the single most common reason a direct debit is wrong, and the easiest to fix.

If you have a smart meter that's stopped sending readings — which happens more than suppliers like to admit — the same applies. Smart does not automatically mean accurate.

2. Does the annual usage figure look like your life?

The letter should state an expected annual consumption in kWh. Compare it to what you actually used last year. If it's substantially higher and nothing has changed in your household, ask why. If something has changed — you've insulated the loft, replaced an old boiler, a family member moved out, you've stopped working from home — tell them. They can't price in a change they don't know about.

3. Has the debit repayment been spread reasonably?

If part of your new payment is clearing an arrears balance, ask over how many months. A balance cleared over three months hurts far more than the same balance over twelve, and suppliers generally have discretion here. You can ask for a longer repayment period.

What to do if you think the figure is wrong

1. Take a meter reading today and submit it. Photograph the meter with the date visible.
2. Call or message your supplier and ask for a direct debit review based on the actual reading. Be specific: name the figure you disagree with and say why.
3. Propose your own number. If you've worked out your annual cost from real usage and real rates, divide by twelve and offer that. Suppliers can often accept a customer-proposed amount if it's realistic.
4. Get it in writing. Ask for confirmation of the agreed new amount and the date it takes effect.
5. If you get nowhere, complain formally. Suppliers have a set window to resolve complaints. After that — or if they issue a deadlock letter — you can take it to the Energy Ombudsman free of charge. Their decision binds the supplier.

If you genuinely can't afford the new amount

This is a different conversation from a disputed calculation, and it's worth naming plainly. Suppliers are required to work with customers in payment difficulty. Ask about affordable payment plans, and ask whether you're eligible for hardship support — some suppliers run funds that can write off part of a balance. If you're on certain benefits, or someone in the household has a health condition or disability, ask about the Priority Services Register too.

Cancelling the direct debit unilaterally is the one move to avoid. It doesn't pause the debt, and it usually moves you onto a more expensive payment method.

Two letters, six months apart, and you can't remember what changed? Clarify keeps your documents together so you can ask questions across them — what your last direct debit was, whether your standing charge has crept up, what your balance was in April. Every answer cites the document it came from.

Try Clarify free

Frequently asked questions

How much notice does my supplier have to give before increasing my direct debit?

Suppliers must notify you in advance of a change to your payment amount and explain the reason clearly. In practice this is usually around ten working days or more before the new amount is taken. If money left your account with no warning at all, that's worth raising as a complaint.

My prices went down but my direct debit went up. Is that a mistake?

Usually not. The direct debit covers your projected usage plus any existing debit balance. If you built up arrears over winter, clearing that can outweigh a rate cut. The letter should show the balance — check it.

Can I just set my own direct debit amount?

You can propose one, and suppliers will often accept a reasonable figure backed by real usage. What you can't do is set it so low that your account slides permanently into debit — the supplier will review it again and the shortfall will still be there.

Am I entitled to a refund of my credit balance?

You can request one. Suppliers may decline or refund only part if they think you'll need the credit for winter usage, but they should explain their reasoning. A request in spring, after a full heating season, is generally the strongest.

What does the "E" next to my meter reading mean?

Estimated. The supplier guessed rather than measured. Readings marked as customer-provided or actual are real. If your recent history is mostly estimates, ask for a recalculation once you've submitted a genuine reading.

Does the price cap mean my bill can't go above a certain amount?

No. The cap limits the unit rates and standing charges on standard variable tariffs, not your total bill. Use more energy and you pay more. The headline "average bill" figure in news coverage is an illustration based on typical usage, not a limit on what you can be charged.

Should I fix my tariff when I get a price change letter?

That depends on where rates are heading, which nobody knows for certain. A fix buys certainty and usually costs a little more than the current variable rate; it can leave you paying above the market if prices fall, and exit fees may apply. Check the exit fee and the end date before deciding, and treat any promise about future prices with scepticism.

What if my smart meter has stopped sending readings?

Then your supplier is estimating, even though you have a smart meter. Report the fault, and in the meantime submit manual readings from the meter itself so your account stays accurate. Don't assume the technology is handling it.

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Disclaimer: This article is general information about how UK energy billing and direct debit reviews work. It is not financial advice and does not take account of your circumstances. Rules, rates and supplier policies change. For help with your own account or bills, contact your supplier, MoneyHelper, or Citizens Advice.