Cheapest monthly rolling energy tariff in the UK (updated)
Find the lowest-cost monthly rolling (no fixed end date) energy options available to UK homes right now — and check whether a rolling tariff is genuinely best for your meter, payment method and region.
- Understand what “monthly rolling” means (and what suppliers may call it)
- Compare rolling tariffs vs fixed deals and the SVT (price cap) in plain English
- See estimated costs for two realistic household scenarios (with assumptions)
Prices vary by region, meter type and payment method. Figures on this page are estimates and for guidance only.
Fast answer: what’s the cheapest monthly rolling tariff right now?
In the UK, the cheapest monthly rolling energy tariff is usually a discounted variable tariff (often called a “tracker”, “variable”, or “flex” deal) that can change with notice. However, the “cheapest” option depends on:
- Your region (distribution area affects standing charge and unit rates)
- Meter type (single-rate, Economy 7, smart prepay, traditional prepay)
- Payment method (Direct Debit is typically cheaper than cash/cheque; prepay differs)
- Eligibility (some deals are new-customer only or require a smart meter)
Important: A monthly rolling tariff can be cheaper today but rise next month. If you want predictable bills, a fixed tariff may still suit you better even if the headline price is slightly higher.
Key takeaways (for quick decisions)
If you need flexibility
Rolling tariffs are typically easier to leave and may have no exit fees (check terms). Useful if you expect to move home or switch again soon.
If you’re on the SVT
A competitively priced rolling deal can beat your Standard Variable Tariff (which is limited by the Ofgem price cap). Not always — standing charges can swing it.
If you have prepay
Your cheapest “rolling” option may be a prepayment variable tariff. Deals can be more limited, especially without a smart prepay meter.
Monthly rolling tariffs: what they are (and what suppliers call them)
A monthly rolling tariff is a plan that continues month to month with no fixed end date. Your price can stay the same for a while, or change with notice (depending on the tariff type). You can usually switch away without a fixed-term exit fee, but you should always check the tariff’s key terms.
Common names you’ll see in the UK
- Standard Variable Tariff (SVT)
- Your supplier’s default tariff. Prices can change. SVT rates are limited by the Ofgem price cap (cap varies by region and payment type).
- Supplier “Variable” / “Flex” tariff
- A rolling variable deal that can be cheaper than SVT. Prices may change more frequently than the SVT (terms vary).
- Tracker tariff (daily/weekly/monthly tracking)
- A rolling tariff where unit rates follow a published benchmark (often wholesale-related). Can be competitive but may rise quickly. Some trackers require smart meters and have specific eligibility rules.
Plain-English rule: If the tariff doesn’t have a fixed end date, you should treat it as “monthly rolling” — even if it’s billed quarterly or your supplier uses a different label.
Two scenarios: what “cheapest” can look like (with numbers)
These examples show how the maths works. They’re not market-wide quotes. Your actual costs depend on your rates and standing charges.
Scenario A: 1–2 bed flat, low/medium use (Direct Debit)
- Usage assumption: 1,800 kWh electricity/year + 8,000 kWh gas/year
- Example SVT annual cost: £1,520
- Example rolling discounted variable: ~6% lower overall than SVT (rates + standing charges combined)
Estimated difference: £1,520 − (6% of £1,520 = £91) ≈ £1,429/year (~£119/month).
If the rolling tariff rises later in the year, this gap could narrow or reverse.
Scenario B: 3–4 bed house, higher use (Economy 7 electricity)
- Usage assumption: 4,200 kWh electricity/year (Economy 7 split 55% night / 45% day) + 15,000 kWh gas/year
- Example fixed tariff: £2,520/year with a £50 exit fee
- Example rolling tracker: averages 3% cheaper over 6 months, then 8% more expensive for 6 months due to market changes
Estimated outcome: Over the year, the tracker could end up slightly more expensive overall than the fixed option, despite being cheaper initially.
This is why “cheapest now” and “cheapest for the year” are not always the same decision.
Check the cheapest monthly rolling deals for your home
Tell us the basics and we’ll compare whole-of-market options where available, including rolling variable and tracker-style tariffs. You’ll see estimated monthly costs based on your details.
Tip: Have your latest bill handy if you can — your annual kWh usage (or your current unit rates/standing charges) makes comparisons much more accurate.
Rolling vs fixed vs SVT: quick comparison
Use this to decide what to compare first. “Cheapest monthly rolling tariff” is often a variable or tracker deal — but it’s not automatically best for every home.
| Tariff type | How price changes | Best for | Watch-outs |
|---|---|---|---|
| Rolling discounted variable | Supplier can change rates with notice | People who want flexibility and to switch again if prices drop | Standing charges can be higher; discounts may be time-limited |
| Rolling tracker | Follows a published benchmark (often wholesale-linked) | People comfortable with price movement and monitoring | Can rise quickly; may have eligibility rules (e.g., smart meter) |
| SVT (price-capped) | Changes, but limited by Ofgem cap levels | People who don’t want to commit; default option | Often not the cheapest; may lag behind competitive market deals |
| Fixed (usually 12–24 months) | Unit rates & standing charges fixed for the term | People who want budget certainty | Exit fees can apply; you may miss future drops |
Decision checklist: does a monthly rolling tariff suit you?
Likely to suit you if…
- You may move home soon (renting, selling, or relocating)
- You’re happy to keep an eye on prices and switch again if needed
- You want to avoid exit fees
- You’re currently on an expensive SVT and want to try beating it
Think twice if…
- You need predictable costs and would struggle with sudden price rises
- You have high usage and want to lock in rates for budgeting
- You’re on Economy 7 and rely on a very specific day/night split
- You’re on traditional prepay and have limited tariff choice
Quick reality check: The cheapest rolling tariff isn’t just about the unit rate. Standing charges (daily fees) can make a “cheap” deal more expensive — especially for low-usage homes.
Costs, exclusions and common pitfalls (UK-specific)
These are the most common reasons a “cheap monthly rolling tariff” doesn’t work out cheaper in real life.
1) Standing charges can dominate
If you use less energy (small flats, single occupants), a higher standing charge can wipe out a lower unit rate. Always compare annual cost estimates, not just p/kWh.
2) Payment method differences
Some tariffs price differently for Direct Debit vs “pay on receipt of bill” and prepayment. Make sure you compare like-for-like, especially if you can’t switch payment methods.
3) Meter type limits choice
Economy 7, smart meters, and traditional prepay can each affect what’s available. A tracker may require a smart meter; an Economy 7 home needs the correct day/night rates.
4) “Intro” discounts and conditions
Some rolling deals are cheap for a short period, then revert. Look for any wording like “introductory” or discounts that can be withdrawn.
5) Exit fees aren’t only on fixed tariffs
Many rolling tariffs have no exit fee, but not all. Also check for debt repayment plans or credit arrangements that can affect switching.
6) Timing and billing quirks
Switching usually completes within days, but final bills, direct debit recalculations and refunds can take longer. Keep meter readings and photos for accuracy.
If you’re in debt to your current supplier: you may still be able to switch, but there can be limits (especially with prepayment). Citizens Advice explains your options and what to do next: Citizens Advice: energy supply and switching.
FAQs: cheapest monthly rolling energy tariffs (UK)
Is a “monthly rolling” tariff the same as the Ofgem price cap?
No. The price cap limits the maximum level of certain default and variable tariffs (including SVTs). A monthly rolling tariff can be an SVT (capped) or another variable/tracker deal that may price differently. Your actual rates are set by your supplier and depend on region, meter type and payment method.
Can I get a monthly rolling tariff with no exit fees?
Often yes, but not always. Many variable tariffs have no exit fees because there’s no fixed end date, but some products can include specific charges or conditions. Always check the tariff information (unit rates, standing charges, and any exit fees) before switching.
Are tracker tariffs risky?
They can be. A tracker can be cheaper when the tracked benchmark is low, but your price may rise quickly if the benchmark rises. If you need stable monthly budgeting, compare fixed options too.
Does the cheapest rolling tariff depend on where I live?
Yes. Energy rates vary by region because network costs differ. Two households with identical usage can see different standing charges and unit rates depending on postcode area.
I have a prepayment meter — can I switch to a rolling deal?
Usually, yes, but choice can be more limited. If you have smart prepay, you may see more options than with traditional key/card meters. If you’re repaying debt through your meter, switching can be restricted.
What’s the difference between unit rate and standing charge?
Unit rate is what you pay per kWh used. The standing charge is a daily fixed amount to cover things like network costs and metering. Both matter — especially for low users where standing charges can make up a big share of the bill.
How quickly can I switch in the UK?
Switching is typically completed within a few working days for many customers, but timings can vary. Keep a meter reading on the day you switch (a photo helps) to reduce the risk of billing issues.
Should I choose rolling electricity only, or dual fuel?
Dual fuel can be simpler (one supplier, one set of bills), but it’s not always cheapest. If you have an Economy 7 or special metering set-up, it’s worth comparing both dual-fuel and separate suppliers to see what works out best.
Trust, methodology and sources
How we assess “cheapest monthly rolling tariff”
Because monthly rolling tariffs can change price, “cheapest” has to be defined clearly. On this page, we use a consumer-friendly approach focused on expected monthly cost and practical suitability rather than a single headline unit rate.
Our comparison inputs (what matters)
- Region: determined by postcode (network area affects rates)
- Fuel type: electricity-only, gas-only, or dual fuel
- Meter type: single-rate, Economy 7, smart meter, prepay
- Payment method: Direct Debit, pay on receipt, prepayment
- Tariff structure: variable, tracker, SVT, fixed
Limitations (what “cheapest” can’t guarantee)
- Rolling prices can change after you join (with notice), so future cost is uncertain
- Not all tariffs are available to all homes (eligibility varies)
- Estimated monthly costs depend on usage assumptions and the rates available at the time
- Supplier billing practices and Direct Debit adjustments can affect your month-to-month payments
Transparency note: We aim to help you compare clearly. We do not promise that a tariff will remain the cheapest for any set period. Always check supplier terms before you switch.
Sources (UK)
Ready to see the cheapest monthly rolling tariffs for your postcode?
Compare estimated monthly costs across rolling variable/tracker options and fixed deals, with clear notes on meter type, payment method and key terms.
Good to know: If you’re unsure what meter you have, don’t worry — start with your postcode and we’ll guide you through the options.
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