How do I compare gas prices in the UK?

To compare gas prices, check the unit rate (pence per kWh) and the daily standing charge for each tariff, then estimate your annual cost using your typical gas usage. Also consider tariff type (fixed vs variable), exit fees, and contract length. If you have a recent bill, use its annual usage figure for the most accurate comparison.

What information do I need to run an accurate gas comparison?

For the most accurate gas comparison you should have: your postcode, your current tariff details (if known), and your annual gas consumption in kWh (from a recent bill or online account). If you don’t have kWh usage, you can estimate based on household size and heating habits, but a bill-based kWh figure is best.

Is it better to choose a fixed or variable gas tariff?

A fixed tariff can protect you from price rises for the fixed term and can make budgeting easier, while a variable tariff can move up or down with the market and may offer more flexibility. The best option depends on your priorities (price certainty vs flexibility) and whether there are any exit fees.

What are gas unit rates and standing charges?

The unit rate is what you pay for each kilowatt hour (kWh) of gas you use. The standing charge is a fixed daily cost that covers things like maintaining the network and providing metering and billing. When comparing tariffs, consider both because a low unit rate can be offset by a higher standing charge (and vice versa).

How can I estimate my annual gas usage for comparison?

The simplest way is to use the annual consumption figure shown on your bill (in kWh). If you only have meter readings, you can calculate usage over a period and annualise it, but remember gas use is seasonal. For the most reliable comparison, use your supplier’s stated annual kWh consumption if available.

Can I compare gas only, or do I need a dual fuel tariff?

You can compare gas-only tariffs if you want to keep electricity with a different supplier. Dual fuel can be convenient and sometimes cheaper, but it’s not always the best value. Compare total costs for your actual usage and check whether any discounts apply only when both fuels are supplied together.

How long does switching gas supplier take and will my supply be interrupted?

Switching usually takes a few days to a few weeks depending on the process and any cooling-off period, but your gas supply should not be interrupted. The change is administrative and the gas continues to come through the same pipes. You’ll normally just provide a meter reading around the switch date for accurate final billing.

Will I need an engineer visit when I switch gas supplier?

In most cases, no engineer visit is needed when switching gas supplier because your existing meter and infrastructure stay the same. You typically only need to provide meter readings (or your smart meter will send them automatically) to ensure accurate billing.

What fees should I look out for when comparing gas tariffs?

Check for exit fees on your current tariff, and any early termination fees on a new fixed tariff. Also review payment method requirements (e.g., Direct Debit) and whether prices shown include VAT. A tariff with a slightly higher rate may still be better value if it has no exit fees or better terms.

How do I get a quote or switch with Energy Plus?

To get a quote or start a switch, use the comparison and quote options available on Energy Plus. Have your postcode and (ideally) your annual gas usage in kWh ready for the most accurate estimate. You can visit https://www.energyplus.co.uk/ to begin.

Gas comparison (UK): compare tariffs, prices and suppliers

A practical UK guide to comparing gas tariffs — what affects your price, how to compare like-for-like, and how switching works (including smart & traditional meters).

See what matters most: unit rate, standing charge, payment method and contract terms
Two realistic cost scenarios (with assumptions) to help you sanity-check quotes
Clear caveats on exit fees, direct debit vs prepayment, and regional price differences

Get your gas quote How gas switching works

Prices vary by region, meter type and payment method. Any costs shown are estimates for guidance and may not match your bill.

Fast answer: how to compare gas tariffs in the UK

To compare gas tariffs accurately, match quotes on the same annual usage (kWh), then prioritise (1) unit rate (p/kWh), (2) standing charge (p/day), (3) payment method (Direct Debit, receipt of bill, prepayment), and (4) contract terms (end date, exit fees, fixed vs variable). Gas prices also vary by region and meter type, so the same tariff name can cost different amounts in different postcodes.

Compare like-for-like

Use your actual annual gas usage (kWh) from a bill. If you only know spend, you can estimate — but it’s less accurate.

Check total estimated cost

A low unit rate can be offset by a higher standing charge (and vice versa), especially in low-usage homes.

Look for “gotchas”

Exit fees, billing frequency, paper bill charges, and prepayment eligibility can change the real-world cost.

Quick tip: If you have gas and electricity with the same supplier, you can still compare and switch as a dual fuel or switch gas-only. The cheapest option depends on how each fuel is priced on your current deal.

Compare gas deals with EnergyPlus

Tell us your postcode and a few details and we’ll help you compare whole-of-market options where available. You’ll be able to check unit rates, standing charges and key terms before you decide.

What you’ll need: your postcode and (ideally) your annual gas usage in kWh from a recent bill. If you don’t have it, you can still get estimates.

How switching gas works (UK)

Choose a tariff based on total estimated annual cost and terms (not just headline rates).
Apply — your new supplier contacts your old supplier and manages the switch.
Cooling-off period applies for most sales channels. You can usually change your mind within this window.
Meter readings are used to create an opening/closing read. Smart meters may send these automatically.
Switch completes — you’ll get a final bill from your old supplier and start paying the new supplier.

Important: If you’re in debt to your current supplier, switching may still be possible, but rules differ by payment method (especially prepayment). If you’re unsure, check options via Citizens Advice.

Get your gas quote

We’ll use these details to locate the right regional prices and contact you about your comparison results.

Gas tariff comparison: what to look at (not just price)

Different tariffs can be cheaper for different households. This table shows the practical differences to check before you switch.

Tariff type	How prices change	Who it can suit	Watch-outs
Fixed	Unit rate & standing charge usually fixed for a set term (e.g. 12 months)	People wanting predictable pricing for a set period	Exit fees may apply; fixed tariffs can be higher than variable at times
Variable	Prices can change (often with notice)	People who want flexibility and may switch again soon	Less price certainty; check whether it’s a supplier’s standard variable tariff
Tracker / index-linked	Moves with a reference price (rules differ by supplier)	Confident users who understand volatility and want transparency	Can rise quickly; understand the index and update frequency before joining
Prepayment (PAYG)	Rates/standing charges can differ; top-up rules apply	Homes that prefer budgeting via top-ups	Eligibility can be restricted by debt; check emergency credit and top-up methods

Decision checklist (use this before you switch)

Do you know your annual gas usage (kWh) from your bill?
Are you comparing the same payment method (Direct Debit vs receipt of bill vs prepay)?
Is the tariff available for your meter type (standard/smart/prepayment)?
Does it have exit fees — and when do they apply?
Are there extras that matter (online-only, paper billing charges, app-only support)?
Are you switching gas-only or dual fuel — and which is cheaper overall?

Who gas comparison tends to suit (and who it may not)

Often suits:

Homes on a standard variable tariff
People whose fixed deal is ending soon
Renters (with permission to manage the account)
Households wanting to align gas + electricity renewal dates

May need extra checks:

Prepayment meters or recent meter changes
Accounts with debt arrangements
Complex tenancy set-ups (bills included)
Multi-register or unusual metering (rare for gas)

Tenant note: If you pay the supplier directly and your name is on the energy account, you can usually switch. If bills are included in rent, you typically can’t.

Two realistic scenarios (with numbers)

These examples show why standing charge and usage both matter. Figures are illustrative estimates using simple maths, not a promise of available rates. Your quote depends on your postcode, supplier availability, meter type and payment method.

Scenario A: low gas use flat (cooking + some heating)

Assumed annual use: 6,000 kWh
Tariff 1: Unit 6.5p/kWh, standing charge 35p/day
Estimated annual cost: (6,000×£0.065) + (365×£0.35) = £390 + £127.75 = £517.75
Tariff 2: Unit 6.9p/kWh, standing charge 20p/day
Estimated annual cost: (6,000×£0.069) + (365×£0.20) = £414 + £73 = £487.00

Takeaway: For low usage, a lower standing charge can beat a lower unit rate.

Scenario B: gas-heated 3-bed house (higher winter demand)

Assumed annual use: 15,000 kWh
Tariff 1: Unit 6.5p/kWh, standing charge 35p/day
Estimated annual cost: (15,000×£0.065) + (365×£0.35) = £975 + £127.75 = £1,102.75
Tariff 2: Unit 6.9p/kWh, standing charge 20p/day
Estimated annual cost: (15,000×£0.069) + (365×£0.20) = £1,035 + £73 = £1,108.00

Takeaway: For higher usage, the unit rate tends to matter more — small p/kWh changes can outweigh standing charge differences.

Sanity-check: If a quote looks unusually low, confirm you’re comparing the same payment method and that the tariff is available in your region and for your meter type.

Costs, exclusions and common pitfalls (UK)

These are the issues most likely to change the real cost of a gas tariff — or stop a switch going smoothly.

Exit fees & end dates

Fixed tariffs may charge an exit fee if you leave early. Check whether fees apply per fuel and when the contract ends (not just the “start date”).

Payment method differences

Direct Debit prices can differ from paying on receipt of bill. Prepayment tariffs often have separate pricing and eligibility rules.

Standing charge impact

The standing charge is paid regardless of usage, which can make “cheap” tariffs expensive for low-use homes.

Meter type & smart data

Some tariffs require a smart meter or use smart readings for billing. If your smart meter isn’t communicating, reads may still be needed.

Estimated bills vs actual reads

If your usage estimate is off, monthly payments can be adjusted. Give regular reads (or ensure smart reads are working) to reduce surprises.

Region & network costs

Gas tariffs vary by region because network charges differ. Always compare using your postcode for accurate standing charges.

If your bills are unusually high: before switching, check your billing basis (actual vs estimated), meter serial number matches your bill, and whether your Direct Debit has been set too low for winter usage.

What’s usually included (and what isn’t)

Usually included in your tariff price

Gas supply costs (unit rate)
Standing charge (daily fixed cost)
VAT at the domestic rate (as applied by suppliers)
Network and policy costs within the tariff pricing structure

Often not included / can be extra

Paper bill charges (supplier-dependent)
Boiler cover or home emergency add-ons
Late payment charges and debt recovery costs
Any cost impact from underestimating usage (payment amounts can be adjusted)

Gas comparison FAQs (UK)

1) What information do I need to compare gas tariffs accurately?

Ideally: your postcode, payment method (Direct Debit / receipt of bill / prepayment), meter type (smart / traditional / prepayment), and annual gas usage in kWh from a recent bill. If you don’t have kWh, you can estimate, but your quote will be less precise.

2) Why do gas standing charges differ by postcode?

Standing charges can vary by region because network costs and how charges are set differ across Great Britain. That’s why a tariff can show different prices depending on your postcode.

3) Can I switch gas if I have a smart meter?

Yes, in most cases. Your meter should continue to measure gas usage. Smart features (automatic readings) can vary during or after a switch depending on meter configuration and supplier systems.

4) Can I switch gas if I’m on a prepayment meter?

Often yes, but eligibility can be affected by debt and the type of prepayment meter. Some suppliers can also change a prepayment meter to credit mode in certain circumstances, but this is case-by-case and not guaranteed.

5) Is it cheaper to switch gas-only or dual fuel?

It depends. Dual fuel can be simpler (one supplier, one account), but it isn’t automatically the cheapest. Compare total annual cost for gas and electricity together, and consider whether separate suppliers would be cheaper overall.

6) What’s the difference between unit rate and standing charge?

The unit rate is what you pay per kWh of gas used. The standing charge is a daily fixed cost that covers things like keeping your home connected and operational costs. You pay standing charge even if you use no gas.

7) Will switching interrupt my gas supply?

Normally no — your physical gas supply remains the same; only the company billing you changes. If anything looks wrong (e.g. incorrect meter details), contact the supplier promptly to avoid billing issues.

8) How do I find my annual gas usage in kWh?

Look at a recent bill or your online account: it often shows usage over the last 12 months in kWh. If you have meter readings in cubic metres (m³) or feet³, your supplier converts them to kWh for billing.

9) What if I’m moving home soon?

If you’re moving within months, consider flexibility: a variable tariff or a fixed tariff with low/no exit fees can reduce risk. Always take move-in and move-out meter readings and keep a photo for your records.

Trust, methodology and sources

Written by:
EnergyPlus Editorial Team

Reviewed by:
Energy Specialist

Last updated:
March 2026

How we assess gas comparison guidance

What we prioritise: accuracy for UK households, clear explanation of unit rate vs standing charge, and practical switching considerations (meter type, payment method, exit fees).
Price examples: Our scenarios use simple bill maths: (annual kWh × unit rate) + (365 × standing charge). They’re designed to help users understand trade-offs, not predict exact bill totals.
Regional variation: We highlight postcode differences because gas standing charges and rates can vary across regions.
Limitations: Market availability changes. Not all tariffs are open to all customers (e.g. prepayment, smart requirements, credit checks, or supplier eligibility criteria). Any quote you receive can differ based on your full details and supplier checks.

Sources (UK)

Ofgem (UK energy regulator) — guidance on consumer rights and the retail energy market.
Citizens Advice: energy — practical help on switching, billing and complaints.
GOV.UK — official government information, including support schemes (where applicable).

We aim to keep this page accurate and up to date, but supplier tariffs and eligibility change frequently. If something looks inconsistent with your bill, use your supplier’s tariff information and contact them to confirm.

Ready to compare gas prices for your postcode?

Get a like-for-like comparison based on your region and details, then review unit rates, standing charges and key terms before choosing.

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Accessibility note: If you’d prefer help completing the form or discussing meter details, use the telephone field and we’ll respond using your preferred contact method where possible.

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Updated on 6 Mar 2026