Cheapest gas tariff for UK homes this month (explained)
Find the lowest estimated gas prices available to you right now — based on your postcode, meter type and how you pay. We’ll show what “cheapest” really means, common exclusions, and how to switch safely.
- Whole-of-market comparison: fixed and variable gas tariffs (where available)
- UK-specific: standing charges, unit rates, payment methods, smart/prepay meters
- Transparent methodology + realistic example costs (no unrealistic promises)
Prices are estimates and change frequently. Availability depends on postcode, meter type, credit checks and supplier criteria. We’ll show you options you can actually apply for.
Fast answer: what’s the cheapest gas tariff this month?
There isn’t one single “cheapest gas tariff” for every UK home in a given month. The lowest estimated cost depends on your postcode region, meter type (credit, smart, prepayment), payment method (monthly Direct Debit vs pay-on-receipt), and how much gas you use.
What “cheapest” usually means in practice: the tariff with the lowest estimated annual cost for your details (unit rate × usage + standing charge), after checking eligibility.
Key takeaway 1
If you’re already on a supplier’s standard variable tariff, the cheapest option for you is often a competitive fixed tariff — but only if exit fees and contract length suit you.
Key takeaway 2
Standing charges can outweigh small differences in unit rates — especially for low gas use homes.
Key takeaway 3
Your “cheapest” tariff may be unavailable if you have prepayment, a supplier-specific meter setup, or fail a credit check for some Direct Debit deals.
If you want the quickest route to the cheapest deal
- Compare using your postcode and payment preference (Direct Debit vs pay-on-receipt).
- Check tariff type: fixed vs variable, contract length, and exit fees.
- Confirm your meter type (credit, smart, prepay) and whether you want gas-only or dual fuel.
Important: “Cheapest” on paper can become expensive if the tariff has high exit fees, a short-lived discount, or if you’re pushed onto an expensive out-of-contract rate later. We highlight these checks below.
Compare the cheapest gas tariffs available to you
Tell us a few details and we’ll match you with tariffs you can apply for. We use your postcode to account for regional standing charges and unit rates, and we’ll show options by payment method and meter type.
Good to know: Many of the lowest-priced tariffs assume monthly Direct Debit. If you prefer to pay on receipt or you’re on prepayment, we’ll still show available options — they may price differently.
What you’ll see after submitting
- Estimated monthly and annual cost (based on your inputs)
- Unit rate + standing charge, tariff type, contract length
- Exit fees and eligibility notes (where applicable)
Prefer to research first? Jump to the comparison table and checklist.
Get your quote
We’ll use these details to contact you with suitable tariffs. Fields marked optional help us reach you quickly.
Compare tariff types (so you can pick the cheapest safely)
“Cheapest” can mean different things depending on how long you plan to stay put and how predictable you want your bills to be. Use this table to choose a tariff type before you compare specific deals.
| Tariff type | Typical “cheapest” angle | Watch outs | Best for |
|---|---|---|---|
| Fixed (e.g. 12 months) | Can be cheapest on estimated annual cost if priced competitively for your region/payment method. | Exit fees; may end and roll onto a pricier rate if you don’t switch again. | Households wanting predictable pricing and willing to commit. |
| Standard variable (SVT) | Usually not the cheapest, but flexible (no exit fees) and price changes follow market movements. | Rates can rise; being “capped” doesn’t mean “cheap”. | People expecting to move, or who want flexibility. |
| Tracker | May be cheapest at times when wholesale prices fall (terms vary by supplier). | Can rise quickly; not ideal if you need budget certainty. | Informed switchers comfortable with price movement. |
| Prepayment (PAYG) | Cheapest option is the lowest PAYG-priced tariff available in your area (often fewer choices). | Limited availability; standing charges still apply; may require meter exchange to move to credit. | Homes that need pay-as-you-go budgeting or can’t access credit tariffs. |
Quick decision checklist
- It likely suits you if…
- You can pay by Direct Debit, plan to stay at your address for 12+ months, and want clear pricing and fewer surprises.
- It may not suit you if…
- You might move soon, you’re on prepayment, or exit fees would be risky — flexibility can be worth more than a slightly lower unit rate.
Two realistic cost scenarios (examples)
These are illustrative examples to show how “cheapest” can change. Your quote will vary by region and tariff.
-
Scenario A: Low gas use flat (single occupant)
Assumptions: 6,000 kWh/year; two tariffs have similar unit rates but different standing charges.
Example: Tariff 1 standing charge 40p/day vs Tariff 2 at 30p/day. Difference = 10p/day ≈ £36.50/year. For low usage, standing charge can decide the “cheapest”, even if unit rates look close. -
Scenario B: Family home (higher gas use)
Assumptions: 14,000 kWh/year; Tariff 1 is 0.2p/kWh cheaper than Tariff 2; standing charges same.
Difference: 14,000 × £0.002 = £28/year. Here, unit rate matters more — but small p/kWh differences may still be modest versus exit fees or contract risk.
Tip: When comparing, look at estimated annual cost first, then sanity-check with unit rate, standing charge and exit fees.
Costs, exclusions and common pitfalls (UK-specific)
These are the most common reasons a “cheap” tariff ends up not being the best choice once you apply, move home, or your usage changes.
1) Exit fees can wipe out small savings
Many fixed tariffs charge exit fees if you leave early. If the “cheapest” deal saves only a few pounds a month, a single exit fee can negate it.
2) Payment method pricing
Direct Debit tariffs can be priced differently from pay-on-receipt. Make sure you compare with the same payment method you’ll actually use.
3) Meter type restrictions (smart / prepayment)
Some tariffs are limited to certain meter types. Prepayment customers may see fewer options; switching may involve a meter exchange or additional checks.
4) Standing charge surprises for low users
If you use little gas (e.g. electric heating, small flat), a higher standing charge can make a low unit rate irrelevant.
What we won’t do
We won’t claim a tariff is the cheapest for everyone, and we won’t hide key terms. If a deal has exit fees, limited eligibility, or assumptions that affect price, we flag it.
If you’re moving home soon
Consider avoiding long fixed deals with exit fees unless the supplier lets you transfer the tariff to your new address (not always possible). A flexible tariff may be safer even if it’s not the absolute cheapest today.
FAQs: cheapest gas tariffs (UK)
Is the cheapest tariff always a fixed tariff?
Not always. Fixed tariffs can be cheapest on estimated annual cost, but a variable or tracker tariff may suit you better if you need flexibility or expect to move. Always compare exit fees, contract length and the estimated annual cost for your usage.
Why does the same tariff price differ by postcode?
Gas standing charges and unit rates can vary by region because network and cost components differ across Great Britain. Your postcode helps identify your region so comparisons are accurate.
Can I get a cheap gas tariff if I’m on prepayment (PAYG)?
Sometimes, but choices can be limited. Some suppliers offer PAYG tariffs, and others may require a meter exchange to move to a credit meter. Eligibility depends on your meter setup, any debt arrangements, and supplier checks.
Does the Ofgem price cap mean I’m on the cheapest tariff?
No. The Ofgem cap limits what suppliers can charge on default tariffs (and some other capped arrangements) but it doesn’t guarantee you’re on the cheapest deal for your circumstances. Competitive fixed tariffs can be cheaper (or not) depending on the month and region.
Will switching interrupt my gas supply?
Switching supplier is designed to be seamless — your gas should not be cut off because you switch. You’ll usually just provide meter readings (or they’re taken automatically if compatible) and your billing moves to the new supplier on the switch date.
How do I know if the “estimated annual cost” matches my home?
It’s a model based on your stated or typical usage. If your usage is unusual (e.g. you’re out most days, or you have a large household), the ranking of “cheapest” can change. If you have recent bills, use your annual kWh to improve accuracy.
Can I switch if I owe money to my current supplier?
It depends on the type of debt and how it’s being managed. Some customers can still switch, while others may need to agree a repayment plan or use a debt assignment process. If you’re unsure, check guidance from Citizens Advice before switching.
Is gas-only ever cheaper than dual fuel?
Sometimes, but not always. Dual fuel can be convenient, but the best-value gas tariff might be with a different supplier to your electricity. Comparing both ways (gas-only vs dual fuel) can reveal the true cheapest overall option for your home.
How we assess the cheapest gas tariff (methodology)
Our definition of “cheapest”
We rank tariffs by estimated annual cost for the user’s situation:
- Estimated annual cost = (unit rate × annual kWh) + (standing charge × 365)
- We account for region (postcode), payment method, and meter type where provided
- We surface key terms that affect real-world cost: exit fees, contract length, and eligibility notes
Limitations (what can change the result)
- Prices change frequently and suppliers may withdraw tariffs at short notice.
- Your actual bills vary with weather, thermostat settings, insulation, and occupancy.
- Eligibility can depend on credit checks, meter compatibility, and debt status.
- Future actions matter: if you don’t switch at contract end, you may move onto a pricier rate.
Editorial note: If two tariffs are close in estimated annual cost, we generally prefer the one with clearer terms, lower exit fees, and broader eligibility — because it’s more likely to be “cheap” in real life, not just in a headline number.
Trust signals
- Written by:
- EnergyPlus Editorial Team
- Reviewed by:
- Energy Specialist (UK domestic markets)
- Last updated:
- April 2026
Sources (UK)
- Ofgem — regulator information, consumer guidance and market rules
- Citizens Advice energy guidance — switching, billing and complaint support
- GOV.UK — official UK guidance (including support schemes and consumer rights)
- Ofgem price cap guidance — what the cap is (and isn’t)
Ready to see your cheapest gas tariff options?
Compare by postcode, meter type and payment method — and get a clear breakdown of unit rates, standing charges and key terms before you switch.
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