Cheapest fixed rate gas tariff for UK homes (how to find it)
The “cheapest” fixed gas deal depends on your postcode, meter type and how you pay. Use this guide to compare fixed tariffs confidently, with clear caveats and real-world examples.
- See what makes a fixed gas tariff cheaper (and what can quietly make it expensive)
- Compare like-for-like: unit rate, standing charge, exit fees and contract length
- Get a whole-of-market quote in minutes (no obligation)
Estimates only. Prices vary by region, meter type, usage and payment method. Always check tariff terms, exit fees and eligibility before switching.
Fast answer: what is the cheapest fixed rate gas tariff?
There isn’t one single “cheapest fixed rate gas tariff” for all UK homes. Fixed prices differ by region (postcode), meter type (smart/standard or prepayment), payment method (Direct Debit vs pay on receipt), usage, and whether you want gas-only or a dual fuel deal.
Best way to find the cheapest fixed gas deal for your home: compare total estimated annual cost (unit rate + standing charge) for your postcode and usage, then check exit fees and what happens after the fix ends.
Key takeaways (so you don’t overpay)
- Don’t judge by unit rate alone: a low unit rate with a high standing charge can cost more overall.
- Check the exit fee (and whether it’s per fuel) if you might switch again.
- Match the contract length to your plans: 12 months vs longer fixes can behave very differently if prices fall.
- Payment method matters: many tariffs price lower on Direct Debit than pay-on-receipt.
- Eligibility matters: some “new customer” or online-only tariffs won’t suit everyone.
Compare fixed gas tariffs (whole of market) and get a quote
Tell us a few details and we’ll show fixed-rate options available for your postcode. You’ll see estimated costs and key terms so you can choose confidently.
Tip: If you’re on a smart meter or prepayment meter, select it accurately. It can change the tariffs you’re eligible for and the rates you see.
How to compare fixed gas deals (in 5 minutes)
- Get your current details: your payment method, meter type, and ideally your annual gas usage (kWh) from a bill.
- Compare total annual cost (not just the headline rate) using the same usage assumptions across tariffs.
- Check the fine print: exit fees, contract length, and what rate applies after the fix ends.
- Consider flexibility: if you might move home, a high exit fee can outweigh a slightly cheaper rate.
- Apply and switch: switching is usually admin-only—your gas supply stays on during the changeover.
Get your fixed gas quote
We’ll use these details to show accurate tariffs for your address and contact you about your quote if you ask us to.
Fixed gas tariff comparison: what to check (and why it changes the “cheapest” deal)
Use this as a quick decision tool. When two tariffs look close, these are the details that usually decide which is genuinely cheaper for your household.
| What you’re comparing | Why it matters | What to look for |
|---|---|---|
| Unit rate (p/kWh) | Drives cost most for high-usage homes. | Compare for your region and meter type. Check if it’s fixed for the full term. |
| Standing charge (p/day) | Can outweigh unit rate for low-usage homes. | Lower is usually better for low usage, but don’t ignore unit rate. |
| Total estimated annual cost | The simplest like-for-like comparison when usage assumptions match. | Ensure the same kWh assumptions are used for each tariff. |
| Exit fees | A “cheap” fix can be costly if you switch or move early. | Check the fee amount and whether it’s per fuel (gas + electricity) on dual fuel. |
| Contract length | Longer fixes can offer budget certainty but less flexibility if prices fall. | Choose a term that matches your risk tolerance and moving plans. |
| Payment method | Prices may differ for Direct Debit, pay on receipt, or prepayment. | Select your real method—don’t assume you’ll change it later. |
| End-of-fix rates | You may roll onto a variable tariff if you do nothing. | Check what happens at the end date and set a reminder to review. |
Quick checklist: a fixed gas tariff might suit you if…
- You want bill stability for a set period.
- You’re comfortable with an exit fee if you leave early.
- You plan to stay put for most of the contract term.
- You’d rather avoid surprise price rises on a variable tariff.
It might not suit you if…
- You expect to move home soon and don’t want early exit charges.
- You’re happy to track the market and prefer flexibility.
- Your situation changes often (income/occupancy), making your usage unpredictable.
- You’re comparing a fix that looks cheap but has a very high standing charge.
Gas-only vs dual fuel: some suppliers price more competitively when you take gas and electricity together. If you want the cheapest fixed gas deal, it can be worth checking both options (and confirming any discount is reflected in the estimate).
Costs, exclusions and common pitfalls (UK-specific)
Fixed tariffs are straightforward once you know what can change the price you actually pay. These are the most common “gotchas” we see when people look for the cheapest fixed gas tariff.
1) Standing charge dominates low usage
If you use little gas (e.g., small flat, well-insulated home), a tariff with a low unit rate but high standing charge can be more expensive overall.
2) Exit fees can wipe out savings
Many fixed deals charge an exit fee if you leave early. If rates fall, or you need to move, that fee can outweigh the benefit of fixing.
3) Payment method changes the tariff
Direct Debit tariffs can price differently to pay-on-receipt or prepayment. Always compare using your actual payment type.
Two realistic scenarios (with numbers)
Important: These are worked examples to show how the maths behaves. Rates are illustrative and not a promise of market pricing. Your quote depends on region, meter, payment method and eligibility.
Scenario A: Low-usage flat (gas for cooking + some heating)
Estimated annual cost:
Tariff 1 = (6,000 × £0.072) + (365 × £0.40) = £432 + £146 = £578
Tariff 2 = (6,000 × £0.078) + (365 × £0.25) = £468 + £91 = £559
Even though Tariff 1 has the lower unit rate, Tariff 2 is cheaper overall because the standing charge is lower.
Scenario B: Higher-usage family home (regular heating)
Estimated annual cost:
Tariff 1 = (15,000 × £0.069) + (365 × £0.33) = £1,035 + £120 = £1,155
Tariff 2 = (15,000 × £0.073) + (365 × £0.25) = £1,095 + £91 = £1,186
Tariff 1 is cheaper if you stay for the term. But if you might switch or move, the £100 exit fee could make Tariff 2 better value overall.
Other exclusions to watch
- Prepayment meters: not all fixes are available, and rates can differ.
- Smart meters: generally compatible, but some tariffs may be “smart-only” or app-managed.
- Online-only billing: paper bills may cost more or be unavailable.
- Introductory discounts: check whether a discount is time-limited and what happens later.
- End-of-fix rollover: you may move to a standard variable tariff if you don’t renew.
If you’re unsure: use your annual kWh from a bill. If you don’t have it, a comparison can use typical estimates, but your “cheapest” result may change when actual usage is applied.
FAQs: cheapest fixed rate gas tariffs (UK)
Are fixed gas tariffs capped by the Ofgem price cap?
The Ofgem price cap applies to standard variable tariffs and some default tariffs, not to fixed deals in the same way. A fixed tariff can be above or below the cap level. That’s why comparing total estimated annual cost (and terms) matters.
Is it cheaper to fix gas only, or go dual fuel?
It depends on the supplier and your circumstances. Some suppliers price dual fuel more competitively; others don’t. Compare both options using the same assumptions and check whether any dual-fuel discount is already included in the estimate.
Will switching fixed gas tariff interrupt my supply?
In normal circumstances, no. Switching supplier is an administrative change. Your gas doesn’t get cut off just because you switch tariff. You may need to provide a meter reading (or it can be taken automatically if you have a smart meter).
How do exit fees work on fixed tariffs?
Exit fees are usually charged if you leave a fixed tariff before the contract end date. The amount and rules vary by supplier and tariff. On dual fuel, an exit fee may apply per fuel. Always check the tariff’s Key Facts or terms before agreeing.
Can I get a fixed gas tariff with a prepayment meter?
Sometimes, yes—availability and pricing can be more limited. Some fixes are only offered to credit meters, while others include prepayment. Compare using your correct meter type to avoid seeing deals you can’t take.
What if I don’t know my annual gas usage (kWh)?
You can still compare using typical estimates, but it’s less precise. If possible, find annual kWh on a recent bill or statement (often shown as “annual consumption” or in your online account). The cheapest deal can change depending on usage—especially when standing charges differ.
Do fixed tariffs protect me from all bill increases?
A fixed tariff normally fixes the unit rate and standing charge for the contract term, but always read the terms. Your total bill can still vary with usage, and some tariffs include conditions (for example, how you pay or manage the account).
I’m renting—can I switch my gas tariff?
In many cases, yes, as long as you’re the bill payer and your tenancy doesn’t explicitly prohibit switching supplier. If you’re unsure, check your tenancy agreement and speak to your landlord/agent. If there are debts on the meter (common with prepay), that can affect switching.
Trust, methodology and sources
Page ownership
How we assess “cheapest fixed rate gas tariff”
When we refer to “cheapest”, we mean the lowest estimated annual cost for a set of user inputs—typically:
- Postcode/region (network costs vary across Great Britain)
- Meter type (credit/smart/prepayment)
- Payment method (e.g., monthly Direct Debit)
- Consumption in kWh/year (from bill where possible)
- Tariff terms including contract length, exit fees, and end-of-fix outcome
Limitations: Tariffs can change quickly, and some deals have eligibility criteria (e.g., online-only, new customers, certain meters). Your final price is confirmed by the supplier at application.
Why your neighbour’s “cheapest fix” may not be yours
Even in the same town, households can see different results because of usage (kWh), meter type, Direct Debit vs pay-on-receipt pricing, and whether the quote is gas-only or dual fuel. That’s why we encourage comparing with your own postcode and usage.
Sources (UK)
We link to these for independent guidance on switching, tariffs and consumer rights.
Ready to check the cheapest fixed gas tariff for your postcode?
Compare fixed-rate options with clear terms (unit rate, standing charge, exit fees) and choose what suits your home—no hype, just UK-specific detail.
Back to Energy Cost Saving Advice