Energy bill rise: when does it start in the UK?
Find out when UK household energy prices typically change, what the next increase could mean for your bills, and compare whole-of-market deals in minutes with EnergyPlus.co.uk.
- Understand when price changes happen (price cap updates and supplier tariff changes)
- See what affects your bill: unit rates, standing charges and usage
- Compare whole-of-market options for your home postcode
Free, no obligation. For UK homes only. Switching depends on availability and eligibility in your area.
When does an energy bill rise start in the UK?
In the UK, most household energy bill increases tend to align with two common triggers:
- Ofgem’s energy price cap updates (for customers on standard variable tariffs and some default tariffs)
- Supplier tariff changes (new prices taking effect on a set date for certain fixed or variable products)
For many households, the key dates are the start of the quarter when the price cap changes. If the cap rises, suppliers can increase unit rates and/or standing charges for capped tariffs from the date the new cap starts. If you’re on a fixed tariff, your rates are usually protected until the fix ends (unless your supplier exits the market or you change tariffs).
Good to know: A “bill rise” doesn’t always mean your monthly direct debit must go up immediately. Suppliers can adjust payments based on expected usage and your account balance, even if rates stay the same. The biggest drivers are your tariff rates and how much energy you use.
Quick answer
If your prices are linked to the Ofgem price cap, changes usually begin at the start of the cap period. If you’re on a fixed deal, changes typically start when your fix ends.
Check deals for my postcodeAre you on a fixed or variable tariff?
- Variable / SVT: more likely to move with the cap
- Fixed: rates set for the fixed term (check your end date)
- Tracker: can change more frequently (often daily)
Compare home energy tariffs before the next rise
If your rates are increasing (or your fix is ending soon), comparing now can help you understand your options. EnergyPlus.co.uk is a whole-of-market comparison service for UK homes, helping you view available tariffs based on your postcode and preferences.
Get your comparison started
Complete the form and we’ll use your details to show suitable home energy options. It takes around 2 minutes.
What you’ll need (and what you won’t)
- Postcode to find tariffs available for your home
- Approximate usage helps, but you can still start without it
- Current tariff end date (if you’re fixed) to avoid unnecessary exit fees
Tip: If your fixed tariff ends within the next few weeks, it’s often worth comparing now so you’re ready when your supplier moves you to a variable rate.
Why act before the start date?
If a rise is due, switching early can help you avoid drifting onto a higher default tariff. You can also choose a deal that better matches how your household uses energy (for example, electric heating versus gas central heating).
Why do energy bills rise?
Even if you don’t change supplier, your costs can increase due to shifts in wholesale prices, network costs, policy charges, and supplier operating costs. Your bill is essentially your unit rate × usage plus your standing charge (and VAT), so changes to either rate can raise your overall spend.
Wholesale energy costs
The cost suppliers pay for gas and electricity can move up or down. These changes often feed through into variable tariffs and price cap levels.
Standing charges & network costs
Your standing charge covers things like maintaining the network and metering. It can change independently of unit rates.
Tariff type & payment method
Fixed, variable, tracker and prepayment tariffs can behave differently. Your meter type and how you pay can also affect pricing.
Ofgem price cap: what it is (and what it isn’t)
The Ofgem energy price cap limits the maximum rates suppliers can charge for certain default tariffs. It is not a cap on your total bill—your bill still depends on how much energy your household uses.
How the cap can affect your home
- Applies mainly to standard variable tariffs (SVT) and some default tariffs
- Sets a limit on unit rates and standing charges (varies by region and payment method)
- If the cap rises, suppliers may increase prices from the new cap start date
Common misunderstandings
| Myth | Reality |
|---|---|
| “The cap is the maximum I’ll pay per year.” | It limits rates; your total depends on usage. |
| “If the cap rises, my direct debit must rise.” | Payments may change, but it’s based on forecast usage and balance. |
| “Fixed tariffs are always more expensive.” | Not always—value depends on rates, term, fees and your usage. |
Regional note: Unit rates and standing charges can vary across Great Britain by distribution region. Your postcode helps determine the prices and deals relevant to your home.
What to do before an energy bill rise starts
If you’ve heard prices are going up, the most useful next step is to confirm what tariff you’re on and whether your rates can change soon. Then compare like-for-like options so you can decide with confidence.
- Check your tariff type: fixed, variable (SVT), tracker, or prepayment. Your latest bill or online account usually shows this.
- Find your fix end date and any exit fee: if you’re fixed, switching early could trigger a fee. If you’re close to the end, comparing now can still help you plan.
- Review your standing charge and unit rate: small changes here can add up, especially if your household uses more energy.
- Compare whole-of-market deals: prioritise the tariff that fits your usage pattern and risk preference (price certainty vs flexibility).
- Keep your meter details handy: smart meter, credit meter, or prepayment—this can affect availability and pricing.
Common mistake to avoid
Comparing using monthly direct debit alone. Two households can pay the same monthly amount but be on very different rates. It’s the unit rate and standing charge that determine value.
If your direct debit rises
Ask your supplier how it was calculated. If you’ve built up credit, you may be able to lower payments. If you’re in debt, a higher payment might be needed even without a price change.
Energy bill rise FAQs (UK)
Will my bill go up on the same day the price cap changes?
If you’re on a capped variable tariff, your rates can change from the cap start date. Your bill changes as you use energy at the new rates. Your direct debit may be adjusted at a different time.
I’m on a fixed tariff—can my price still rise?
Generally, your unit rates and standing charge stay the same for the fixed term. Your monthly payment can still be reviewed based on usage or account balance. Check your tariff terms and end date.
Do standing charges increase when bills rise?
They can. A bill rise can come from higher unit rates, higher standing charges, or both. Comparing tariffs helps you see the full picture.
Is it worth switching if prices are going up?
It can be—especially if you’re moving off a high default rate or your fixed deal is ending. The best option depends on what tariffs are available for your postcode and your household’s usage.
How fast can I switch energy supplier?
Switching times vary by supplier and circumstance. Many switches complete within days, but it can take longer in some cases (for example, complex meter situations or debt on a prepayment meter).
Does my location in the UK matter?
Yes. Prices can differ by distribution region, and tariff availability can vary. Using your postcode gives you the most accurate comparison for your home.
What other households do when prices are due to rise
People typically take one of three routes: lock in price certainty, stay flexible, or reduce usage. There’s no single “best” choice—only what fits your home.
Fix for certainty
A fixed tariff can help you budget. Check the unit rate, standing charge, length, and any exit fees.
Stay on variable
A variable tariff may fall if market conditions improve, but it can also rise. Make sure you understand the risk.
Cut consumption
Small changes—heating timers, draught-proofing, efficient lighting—can help soften the impact of higher rates.
Trust & social proof
When bills are rising, clarity matters. Here’s what users value about a straightforward, whole-of-market comparison approach.
“I finally understood the difference between unit rates and standing charges. The comparison was clear and didn’t waste time.”
“My fixed deal was ending and I didn’t want to roll onto a higher variable tariff. I compared options quickly with my postcode.”
“Simple form, no confusion. Helpful overview of what can change and when.”
Transparency: Tariffs, rates and availability change. Always confirm final prices and terms with the supplier before switching.
Ready to check your options before prices change?
Use your postcode to compare whole-of-market home energy tariffs and see what’s available for your household.
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Before you go
- Know your tariff type
- Check your fix end date
- Compare using unit rates + standing charges
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