UK Energy Price Cap explained (and what it means for your bills)
A clear, UK-focused guide to how Ofgem’s price cap works, what it does (and doesn’t) cap, and how to check whether a fixed tariff could suit you.
- Understand how the cap affects unit rates and standing charges
- See realistic cost examples (electricity + gas) with assumptions
- Use our checklist to decide: capped variable vs fixed
Estimates only. The price cap varies by region, payment method and meter type. Tariff availability and terms vary by supplier.
Fast answer: what is the energy price cap?
The Energy Price Cap is set by Ofgem and limits the maximum price per unit (kWh) and standing charge suppliers can charge most households on standard variable tariffs (SVTs) and some default tariffs. It is not a cap on your total bill.
Key point: Your total cost still depends on how much energy you use. If you use more kWh, you pay more—even under the cap.
What it covers
Unit rates and standing charges on capped variable/default tariffs, for most domestic customers.
What it doesn’t do
It doesn’t cap your bill, and it doesn’t automatically apply to fixed tariffs.
Why it matters
It helps you judge if a fixed deal is priced fairly versus the market’s capped variable baseline.
How the price cap works (in plain English)
Ofgem reviews and updates the cap regularly. The cap sets maximum allowed charges for different combinations of:
- Region (your local electricity distribution area)
- Payment method (e.g. Direct Debit, prepayment)
- Meter type (standard vs smart, prepayment, Economy 7 and other multi-rate where applicable)
Your supplier’s SVT must keep its unit rate(s) and standing charge at or below the cap level for your region and meter/payment type.
Important: The widely quoted “typical annual bill” figure you see in the news is an illustration based on typical use. Your home’s actual annual cost will differ.
Does the cap apply to fixed tariffs?
Usually no. Fixed tariffs have prices set in your contract for a period (e.g. 12 months). They can be above or below the capped SVT rates. Fixed deals may include exit fees if you leave early.
Two realistic scenarios (with numbers)
These examples show how the cap affects the rates you’re charged, not a guaranteed bill. We’ve used simplified maths to make it easy to follow.
Scenario A: Medium-use dual fuel on SVT
Assumptions (illustrative only): Direct Debit; single-rate electricity; annual use 2,700 kWh electric + 11,500 kWh gas. Example capped rates: electric 24p/kWh + 60p/day standing; gas 6p/kWh + 31p/day standing.
- Electric usage: 2,700 × £0.24 ≈ £648
- Electric standing: 365 × £0.60 ≈ £219
- Gas usage: 11,500 × £0.06 ≈ £690
- Gas standing: 365 × £0.31 ≈ £113
- Estimated total ≈ £1,670/year
Scenario B: Low-use flat, electricity only
Assumptions (illustrative only): Single-rate electricity; annual use 1,600 kWh. Example capped rates: 24p/kWh + 60p/day standing.
- Usage: 1,600 × £0.24 ≈ £384
- Standing: 365 × £0.60 ≈ £219
- Estimated total ≈ £603/year
In low-use homes, the standing charge can be a large share of the bill—so comparing tariffs isn’t just about unit rates.
Rates above are examples for explanation only. Real cap levels and supplier prices vary by region, payment method, meter and update period.
Compare capped variable vs fixed tariffs (and get a quote)
If you’re on a standard variable tariff, the price cap gives you consumer protection—but it doesn’t always mean it’s the best fit. A fixed tariff could offer price certainty, while a capped SVT may be more flexible. The right choice depends on your home and preferences.
Quick guidance: when to consider switching
- You want predictability: fixed deals can help you budget (check exit fees and end dates).
- You’ve moved in recently: many homes are placed on the supplier’s default/SVT—worth checking.
- You have an Economy 7 / multi-rate meter: compare like-for-like rates and your day/night usage split.
- You’re on prepay: compare prepayment options; support and top-up methods can matter as much as price.
Caveat: If you’re in debt to your current supplier, you may still be able to switch in some situations, but there can be restrictions—especially for prepayment meters. If in doubt, check with your supplier or Citizens Advice.
Get your EnergyPlus quote
Tip: If you can, check your current tariff name on a recent bill or in your online account—especially whether it’s a fixed deal or standard variable.
Capped variable vs fixed: side-by-side comparison
Use this to decide what to check before you switch. Individual tariffs differ, so always confirm the unit rate(s), standing charge, contract length and exit fees.
| Feature | Price-capped SVT / default tariff | Fixed tariff | What to watch |
|---|---|---|---|
| Price certainty | Rates can change when the cap updates | Rates usually fixed for the contract term | When the fix ends you may move to SVT unless you choose another deal |
| Protection | Unit rates + standing charge limited by Ofgem cap | Not normally capped (contract prices apply) | Check if prices are higher than capped SVT and whether you value certainty |
| Flexibility | Often no exit fees | May include exit fees for early leaving | If you may move home soon, check early termination charges |
| Meter types | Cap varies by meter/payment type (incl. prepay) | Availability can vary; not all suppliers offer all meter types | Economy 7: compare day/night rates and your usage split |
| Who it can suit | Those who want flexibility and a regulated ceiling on rates | Those who prefer budgeting certainty for a set term | Always compare total estimated cost, not just headline rates |
Decision checklist (quick)
- If you’re leaning towards a fixed tariff, check:
- Exit fees, contract length, what happens at the end of the fix, and whether rates are competitive against today’s capped SVT.
- If you’re staying on a capped SVT, check:
- Your meter type and payment method, plus whether your standing charge is a big driver of costs (common in low-use homes).
- For any switch, confirm:
- Your current tariff name, whether you owe a balance, and whether you need like-for-like (e.g. Economy 7).
Who the price cap suits (and who it doesn’t)
Often suits: people who want flexibility, don’t want a long contract, or may move home soon.
May not suit: those who want stable monthly budgeting or who can access a competitively priced fix (after checking fees/terms).
There isn’t a single best option for every household—your region, meter, usage pattern and risk preference all matter.
Costs, exclusions and common pitfalls
A lot of confusion about the price cap comes from what it doesn’t do. These are the most common gotchas we see when households compare deals.
1) Thinking the cap limits your total bill
It doesn’t. The cap limits unit prices and standing charges—your total cost still depends on your kWh usage.
2) Comparing the wrong meter type
Economy 7 and other multi-rate meters need like-for-like comparisons. A cheap night rate won’t help if most of your use is daytime.
3) Ignoring standing charges
Standing charges can be a big share of the bill in low-use homes. Always look at both the unit rate and the standing charge.
4) Not checking exit fees on fixes
Some fixed tariffs charge if you leave early. If you may move, or want freedom to switch again, read the tariff details carefully.
Does the cap apply to everyone?
It applies to most households on default/SVT tariffs. It won’t necessarily apply to bespoke deals, some specialist tariffs, or where a contract sets different prices (e.g. fixed deals).
Regional differences
The cap level varies by region. Two neighbours in different distribution regions can see different maximum standing charges and unit rates.
If you’re struggling to pay
If you’re worried about affording energy bills, you don’t have to handle it alone. Suppliers may offer payment plans and support, and there are independent organisations that can help you understand your options.
Energy price cap FAQs
Is the price cap the same as the “typical annual bill” in the news?
The headline figure is an illustration based on typical usage. The actual cap is set as maximum unit rates and standing charges, which vary by region, payment method and meter type.
Does the cap mean my supplier can’t raise prices?
Suppliers can change SVT prices when the cap changes, but they must stay at or below the cap level for your category. Fixed tariff prices usually don’t change during the fix (unless your contract says otherwise).
How do I know if I’m on a capped tariff?
If you’re on a standard variable tariff (often called “Standard”, “Default” or similar), it’s typically price-capped. Check your latest bill, online account, or ask your supplier for your tariff name and rates.
Can my fixed tariff be above the price cap?
Yes. The cap mainly applies to SVTs/default tariffs. Fixed deals can be priced above or below capped rates. If you’re considering a fix above the cap, weigh up price certainty versus potentially higher estimated costs.
Does the cap cover prepayment meters?
There are cap levels for prepayment customers too (including smart prepay). Your exact cap depends on region and meter/payment category, so comparing like-for-like is important.
If I switch supplier, will I lose protection from the cap?
If you move onto another supplier’s SVT/default tariff, it should also be price-capped for most households. If you choose a fixed tariff, your protection comes from the contract terms rather than the cap.
Why are standing charges so high if there’s a cap?
The cap includes a maximum standing charge too—but that maximum can still be significant. Standing charges help cover fixed network and operating costs. Ofgem sets the cap using a defined methodology.
Do I need to contact my supplier when the cap changes?
Not usually. If you’re on an SVT, suppliers typically update rates automatically and notify you. It’s still worth checking what you’re paying and comparing options if you want more certainty.
Need help working out your current rates?
You can usually find your unit rate(s) and standing charge on your bill under “Tariff information” or “About your tariff”. If you’re not sure what meter you have (single-rate vs Economy 7 vs prepay), we can help you interpret it when you request a quote.
Trust, methodology and sources
Editorial transparency
- Written by:
- EnergyPlus Editorial Team
- Reviewed by:
- Energy Specialist
- Last updated:
- May 2026
How we assess the price cap (our method)
- We explain the cap as limits on unit rates and standing charges, not a household bill limit.
- We highlight the main variables that change the cap: region, payment method and meter type.
- We use illustrative scenarios with stated assumptions to show how costs can add up.
- We focus on decision factors that affect real households: exit fees, end-of-fix reversion, multi-rate meters, and standing charge impact.
Limitations: Example rates in this guide are simplified for clarity and aren’t today’s official cap figures. For exact cap levels, use Ofgem’s published tables and your supplier’s tariff information.
Ready to compare energy deals for your home?
See tariff options for your region, meter type and payment method—then decide whether a capped variable tariff or a fixed deal fits your household.
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