Cheapest fixed energy tariff with no lock-in (UK)
Find fixed deals that behave like flexible tariffs: stable unit rates, but with no (or low) exit fees. Compare whole-of-market options by postcode, meter type and payment method.
- See whether a “no lock-in fixed” is genuinely fee-free (or just “low exit fee”)
- Check eligibility: Direct Debit vs prepay, smart vs traditional meters, and regional pricing
- Get a quote in minutes and keep control — you can switch again if prices fall
Prices are estimated and depend on your region, payment method, meter type and current supplier terms. Always check tariff T&Cs before you switch.
Fast answer: what “cheapest fixed with no lock-in” means in the UK
In UK energy, a fixed tariff typically means your unit rates (p/kWh) and standing charges (p/day) are set for a period (often 12–24 months). “No lock-in” usually means you can leave the fixed tariff early without exit fees — but wording varies by supplier, so you must check the tariff’s exit fee and any minimum term.
Cheapest depends on you
Prices vary by region, payment method (Direct Debit vs credit vs prepay), and meter type (standard vs smart). There isn’t one “UK-wide” cheapest deal.
Look for “£0 exit fees”
Some fixed deals advertise flexibility but still charge an exit fee per fuel. “No lock-in” should clearly state £0 exit fee (or explain when fees apply).
You’re never stuck with your supplier
Even on a fixed tariff, you can normally switch anytime. The question is what it costs to leave early and whether a new tariff would beat your current rates.
Compare no-lock-in fixed tariffs by postcode (whole of market)
Use the form to see available fixed tariffs with £0 exit fees (and close alternatives with low fees), then compare them against flexible (SVT) options. We’ll show you the estimated yearly cost based on your details.
What you’ll need
- Postcode (to price your region correctly)
- Rough usage (or your latest bill)
- Whether you pay by Direct Debit, receipt of bill, or prepay
What we’ll compare
- Electricity-only, gas-only, or dual fuel
- Fixed deals (including fee-free where available)
- Flexible tariffs for a fair baseline
Get your quote
How to check a “no lock-in fixed” is genuinely flexible
1) Confirm exit fees (per fuel)
Exit fees may be £0, or a set amount like £25–£100 per fuel. Dual fuel could mean two fees if both are fixed.
2) Check any minimum term
Some tariffs are “rolling fixes” but still have conditions (e.g., an initial period). Look for wording such as “no exit fees at any time”.
3) Match the tariff to your meter
Some deals are only for smart meters or specific meter setups. Prepayment options can be more limited and priced differently.
4) Compare the whole cost, not just the fix
A “cheap” unit rate can be offset by a higher standing charge. Always compare estimated annual cost using your usage.
Compare options: fee-free fixed vs low-fee fixed vs flexible
Use this table to decide what you’re actually optimising for: price certainty, ability to leave, or simplicity. The best fit depends on how likely you are to switch again soon.
| Option | Price certainty | Leaving early | When it can suit | Watch-outs |
|---|---|---|---|---|
| Fixed, £0 exit fees | High (rates fixed) | Usually free to leave | You want stability but may switch again if prices drop | May not be the absolute cheapest; eligibility can be narrower |
| Fixed, low exit fees | High (rates fixed) | Fee applies (often per fuel) | You expect to stay put and want the best fixed price | Leaving early can wipe out savings; check end dates and fees |
| Flexible (SVT/variable) | Lower (rates can change) | Usually no exit fees | You want maximum flexibility; you’re watching the market | Bills can rise with price cap changes; budgeting is harder |
Decision checklist: who a no-lock-in fixed suits
- You want bill predictability but don’t want to pay to leave.
- You think you might move home within the next year.
- You’re willing to pay a bit more for flexibility if needed.
- You plan to review again at the next price cap change.
Who it may not suit
- You’re confident you’ll stay put and want the lowest fixed price even if it has an exit fee.
- You’re on prepayment and options are limited — the cheapest available may be different.
- Your usage is very high and you need the lowest unit rate, not extra flexibility.
- You’re in debt to your current supplier — switching may be restricted in some cases.
Two realistic UK scenarios (with numbers)
These examples show how exit fees and standing charges can change what “cheapest” means. Figures are illustrative and not a quote.
Scenario A: renter likely to move in 6 months
- Assumptions
- Dual fuel, Direct Debit, typical credit meter. Usage: 2,900 kWh electricity and 12,000 kWh gas per year.
- Option 1 (fixed, £0 exit fees)
- Estimated annual cost: £1,720 (so ~£860 for 6 months).
- Option 2 (slightly cheaper fixed, £120 exit fees)
- Estimated annual cost: £1,660 (so ~£830 for 6 months) + potential exit fees £120.
- What it suggests
- If you do leave early, the “cheaper” fixed could end up costing ~£90 more overall (£830 + £120 vs £860). A fee-free fixed can be the safer pick.
Scenario B: homeowner staying 18–24 months
- Assumptions
- Dual fuel, Direct Debit, smart meter. Usage: 4,200 kWh electricity and 15,000 kWh gas per year.
- Option 1 (fixed, £0 exit fees)
- Estimated annual cost: £2,240.
- Option 2 (cheaper fixed, £150 exit fees)
- Estimated annual cost: £2,130. Exit fees only matter if you leave early.
- What it suggests
- If you’re likely to stay the full term, the cheaper fixed can be better value. If you think you’ll switch again soon, the fee-free fixed reduces regret.
Costs, exclusions and common pitfalls (UK-specific)
“No lock-in” can still have conditions
Some tariffs waive exit fees only after a certain date, or only if you move home. Always check the tariff information label/T&Cs for exit fee amount and rules.
Standing charge surprises
A lower unit rate can come with a higher standing charge. If you use less energy (e.g., small flat), standing charges can make a big difference to total cost.
Payment method changes the price
Many tariffs price cheapest on monthly Direct Debit. Paying on receipt of bill or using prepayment may mean different unit rates and fewer “fee-free fixed” options.
Meter type and tariff availability
Economy 7, smart tariffs, and some legacy meters may limit what’s available. If you have storage heaters or time-of-use pricing, compare using the right tariff type.
FAQs: cheapest fixed energy with no lock-in (UK)
Is there really a fixed tariff with no lock-in in the UK?
Sometimes, yes: certain suppliers offer fixed tariffs with £0 exit fees. Availability changes, and it can depend on your postcode, meter type and payment method. Always verify exit fees in the tariff terms before switching.
What’s the difference between “no lock-in” and “no exit fees”?
They’re often used interchangeably, but they’re not always identical. “No lock-in” is marketing language; “£0 exit fees” is the concrete rule you can check. Look for the exit fee amount and when it applies.
Can a fixed tariff price still change?
On a true fixed tariff, the unit rate and standing charge are fixed for the term, but there can be exceptions (e.g., changes to VAT, government charges, or supplier terms—rare and usually specified). Always read the tariff’s price variation clauses.
Does the Ofgem price cap apply to fixed tariffs?
The price cap limits prices on standard variable tariffs (SVTs) for most households. Fixed tariffs are priced separately, so they can be above or below the capped SVT level. That’s why comparing estimated annual cost matters.
Can I get a no-lock-in fixed tariff on prepayment (PAYG)?
Possibly, but choices can be more limited and prices may differ from Direct Debit tariffs. If you’re on a traditional key/card meter or smart prepay, compare using your correct meter and payment type to see what’s genuinely available.
Will switching affect my smart meter?
In most cases, your smart meter should continue working, but functionality can vary depending on meter type and supplier systems. If smart features are important (in-home display, half-hourly data, smart tariffs), confirm compatibility before switching.
If I switch to a fixed deal now, can I switch again later?
Yes — you can normally initiate a switch at any time. The key question is whether your tariff has exit fees (and if so, how much). A fee-free fixed is designed for people who want that option.
How do I know if a “cheap” tariff is actually cheaper for me?
Compare using your annual kWh usage (from your bill) and your region. Focus on estimated annual cost, then sanity-check the unit rates and standing charges. If you don’t have exact usage, start with an estimate and refine later.
Trust, editorial standards and methodology
Page ownership
- Written by
- EnergyPlus Editorial Team
- Reviewed by
- Energy Specialist
- Last updated
- May 2026
How we assess “cheapest fixed with no lock-in”
Because UK energy pricing varies by region and household, we don’t name a single “cheapest tariff for everyone”. Instead, we help you identify the cheapest options for your postcode and setup.
- Cheapest = lowest estimated annual cost using your declared or estimated consumption (kWh) and your regional rates.
- Fixed = unit rates and standing charges fixed for the stated term, subject to the tariff’s terms.
- No lock-in = prioritise tariffs with £0 exit fees; we also show close alternatives with low exit fees so you can choose consciously.
- We check eligibility filters that commonly change availability: payment method, meter type (including Economy 7 / smart), and fuel type.
Helpful UK sources
- Ofgem (UK energy regulator) — guidance on the energy market, price cap, switching and consumer protections.
- Citizens Advice: energy — help with bills, switching, and problems with suppliers.
- GOV.UK — official government information, including support schemes when available.
Ready to check today’s fee-free fixed deals for your postcode?
Compare fixed tariffs with no exit fees (plus the closest low-fee alternatives) and see the estimated yearly cost for your home.
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