How do I find the cheapest energy tariff in my postcode (UK)?

Enter your postcode and a few details about your home (fuel type, payment method, and whether you want fixed or variable). You’ll then see available tariffs for your area, so you can compare estimated annual cost, unit rates, standing charges, and contract length before switching online.

Why do energy prices vary by postcode?

Energy standing charges and unit rates can vary by region due to differences in local network costs and how electricity and gas are distributed. That’s why the “cheapest tariff” can differ between postcodes—even for the same supplier and tariff type.

What details do I need to compare tariffs accurately?

For the most accurate quote, have your postcode, whether you want gas, electricity or dual fuel, your current payment method (direct debit, prepayment, etc.), and ideally your annual usage (kWh) or a recent bill. If you don’t know your usage, you can still compare using estimates based on property size and household.

Is the cheapest tariff always the best option?

Not always. The cheapest estimate may come with a longer contract, exit fees, or different terms. Compare unit rates and standing charges, check contract length, and confirm any exit fees. If you want flexibility, a variable tariff may suit you; if you want price certainty, a fixed tariff may be better.

Can I switch energy supplier if I’m in a fixed-term contract?

Usually yes, but you may have to pay an exit fee if you leave before the contract ends. Many tariffs allow a fee-free switch during the final weeks of your contract—check your current tariff terms or your latest bill before starting a switch.

How long does it take to switch energy supplier in the UK?

In many cases, switching completes within around 5 working days. Your energy supply won’t be interrupted—only your billing changes. You’ll usually be asked to submit a meter reading around the switch date to ensure your final and first bills are accurate.

Will my credit score be affected when I switch energy tariffs?

Most switches do not affect your credit score, but some suppliers may carry out a credit check for certain payment methods (such as monthly direct debit). If credit checks are a concern, you can compare tariffs with alternative payment options where available.

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

The unit rate is what you pay per kWh of energy you use. The standing charge is a daily fixed cost that covers network and meter costs. A tariff can look cheap on unit rate but be more expensive overall if the standing charge is higher—so compare both together.

How can I reduce my energy bill as well as switching tariff?

Alongside finding a cheaper tariff for your postcode, you can cut costs by using a smart meter (where available), reducing heat loss (draught-proofing and insulation), lowering flow temperature on boilers, and shifting usage to off-peak times if you’re on an eligible time-of-use tariff.

How do I switch to a cheaper energy tariff with EnergyPlus?

Use the postcode checker on this page to compare available deals for your area, choose the tariff that fits your needs (price certainty vs flexibility), and follow the online switch steps. You’ll keep the same supply with no downtime, and your new supplier will manage the transfer for you.

Cheapest energy tariff by postcode (UK) — December 2025

Compare whole-of-market home energy deals for your exact area. Enter your postcode to see the cheapest tariffs available in December 2025, including fixed and flexible options, with clear estimated monthly costs.

Whole-of-market comparison for UK households (not business)
Results tailored to your postcode, meter type and usage
See fixed vs variable prices, unit rates and standing charges
Switch online in minutes — we’ll guide you through the steps

Compare tariffs by postcode How postcode pricing works

Estimates use typical home usage unless you provide your own. Prices change frequently; we show the latest available tariffs for your postcode at the time you compare.

Find the cheapest energy tariff for your postcode

In the UK, the cheapest tariff isn’t the same everywhere. Your postcode (and the electricity distribution region it sits in), meter type and payment method can all change the unit rate and standing charge you’re offered. That’s why comparing by postcode is the fastest way to see what’s actually available for your home in December 2025.

EnergyPlus.co.uk is a whole-of-market comparison service for households, designed to help you shortlist value-for-money deals without wading through confusing pricing structures. We show fixed and flexible options, highlight important tariff features, and help you move to your chosen supplier.

Tip: If you have a recent bill to hand, use your exact kWh usage for the most accurate “cheapest” results. If not, you can still compare using typical usage assumptions.

Get your postcode results

Enter a few details to see the cheapest tariffs available for your home.

Postcode Fuel type Payment method Meter type

Electricity use (kWh/year) Gas use (kWh/year)

Email (to send your results)

Questions?

By continuing you confirm this is for a UK home. We’ll use your details to provide results and may contact you about your comparison. You can opt out any time.

Not sure of your usage? Enter postcode and select meter type — we can estimate typical usage and still surface the cheapest available tariffs.

What you’ll see in your postcode results

Estimated monthly cost
Based on your usage (or typical household assumptions).

Rates & charges
Unit rates (p/kWh) and standing charges (p/day) by fuel.

Tariff features
Exit fees, contract length, smart requirements and more.

Why compare with EnergyPlus.co.uk?

If you’re looking for the cheapest energy tariff by postcode in December 2025, you need pricing clarity, not guesswork. Here’s what our whole-of-market comparison is built for:

Postcode-accurate deals

Your distribution region affects standing charges and unit rates. We match tariffs to your location and meter setup.

Whole-of-market view

Compare across the market rather than checking individual suppliers one-by-one. See fixed and flexible options in one place.

Clear tariff details

We surface what matters: contract length, exit fees, payment method assumptions and key eligibility notes.

Built for households

This page is for home energy comparisons only. If you have a business meter, you’ll need business tariffs.

Faster switching

When you’ve found the cheapest suitable option, you can start the switch with the key details ready.

No confusion on “cheap”

Cheapest is calculated using rates for your region and your usage assumptions — not a one-size-fits-all headline price.

How “cheapest by postcode” works in the UK

Two homes using the same amount of energy can still pay different amounts because tariff pricing is influenced by regional network costs (reflected mainly in standing charges) and metering (single-rate vs Economy 7). Comparing by postcode ensures you’re seeing prices that match the region your home sits in.

Enter your postcode to identify your electricity distribution region and available tariffs.
Select your fuel and meter type (smart, standard, Economy 7). This affects the rates you’ll be offered.
Add your usage (kWh/year) if you know it for better accuracy.
Compare like-for-like using unit rates, standing charges and estimated costs.
Choose a tariff and switch if it fits your needs (contract length, fees, flexibility).

December 2025 note: Energy prices can change quickly. If you’re comparing in December, consider whether you want price certainty (fixed) over flexibility (variable), and check exit fees before committing.

Understanding tariff prices (unit rate vs standing charge)

To spot the cheapest energy tariff for your postcode, focus on the two main components that drive your bill: unit rate (p/kWh) and standing charge (p/day). A tariff can look “cheap” on one part and still be expensive overall.

Price element	What it means	Why it varies by postcode	Who it affects most
Unit rate (p/kWh)	What you pay for each kWh of gas/electricity you use.	Suppliers price by region and meter type; some regions have different network charges.	Higher-usage homes benefit most from lower unit rates.
Standing charge (p/day)	A daily fixed charge to keep you connected and cover fixed costs.	Strongly influenced by distribution region and payment/meter type.	Lower-usage homes feel high standing charges more.
Multi-rate pricing (e.g. Economy 7)	Different day/night unit rates for electricity.	Availability and rate structure vary by region and meter.	Homes that use more electricity overnight (storage heating, EV charging).
Exit fees / terms	Charges for leaving a fixed tariff early, plus contract length.	Not postcode-specific, but crucial when rates shift seasonally.	Anyone who might move home or switch again soon.

What “cheapest” usually means

The cheapest tariff is the one with the lowest estimated annual cost for your usage, not necessarily the lowest unit rate or lowest standing charge on its own.

Fixed vs variable in December

Fixed tariffs can protect you from price rises, while variable tariffs can be better if prices fall — but can also change with market conditions.

Why energy prices vary by postcode

Your postcode helps identify your electricity distribution region (the network that delivers power to your home). Different regions have different operating costs and network charges, which can feed into the standing charge and, in some cases, the unit rate.

Gas is less regionally variable than electricity, but your overall cheapest deal can still differ by postcode because suppliers bundle pricing and set tariffs by region.

Practical examples of postcode impacts

Standing charge differences: Some regions have higher daily fixed charges, which can make “low unit rate” tariffs less attractive for low-usage households.
Economy 7 availability: Multi-rate pricing and deal availability can depend on your meter setup and supplier support in your region.
Supplier appetite: Not every supplier markets every tariff in every region at the same price point.

If you’ve recently moved home

When you move, you’re automatically on the home’s existing supplier (often on a variable tariff). Comparing by your new postcode is the quickest route to seeing whether a cheaper tariff is available for that address.

Common mistakes when searching for the cheapest tariff

Comparing without a postcode

Headline rates can be misleading. The cheapest deal for one region might not be cheapest where you live due to standing charge differences.

Ignoring the standing charge

Low unit rates can be offset by high standing charges, particularly if you’re a low-usage household or you’re out at work most days.

Using the wrong usage

If your kWh assumptions are too high/low, the “cheapest” ranking can change. If possible, use annual kWh from a recent bill.

Not checking tariff terms

Cheapest isn’t always best if exit fees are high or the contract doesn’t suit your plans. Always check term length and any early exit charges.

If you’re unsure, start with a quick postcode comparison and then refine using your real usage. Go back to the comparison form.

Cheapest energy tariff by postcode — FAQs

Do you need my full address to show the cheapest tariff?

A postcode is usually enough to return region-accurate prices. For switching, suppliers may later request full address details to confirm the exact meter point.

Is the cheapest tariff always a fixed tariff?

Not necessarily. A variable tariff can be cheaper at the point you compare, but it can change. A fixed tariff can provide price certainty for a set term. The best choice depends on your priorities and the terms (including any exit fees).

Can I compare prepayment meter tariffs by postcode?

Yes. Select Prepayment meter under payment method. Availability and pricing can differ, so it’s important to compare using your real setup.

What if I’m on Economy 7?

Choose Economy 7 / multi-rate under meter type. The cheapest option depends on how much electricity you use at night versus day, so using your actual usage split (if you have it) helps.

Will switching affect my supply?

Your gas and electricity supply should continue as normal during a switch. Your new supplier handles the process, and you’ll be told if any action is needed.

Is this service for business energy?

No — this page and the form are for UK home energy comparisons. Business meters require different tariffs and eligibility checks.

Ready to check your postcode?

Start with postcode and meter type — then refine with your kWh usage for the most accurate cheapest-tariff ranking.

Compare cheapest tariffs now

What households say about comparing with EnergyPlus

Real feedback varies by person and region — here are typical experiences from UK households using postcode-based comparisons.

“Entering our postcode made a big difference — the first ‘cheap’ deal I saw elsewhere wasn’t available in our area. The results here were clear and easy to compare.”

Homeowner, West Midlands

“I liked seeing the unit rate and standing charge side-by-side. It helped me pick a tariff that suits our lower usage rather than just the lowest kWh rate.”

Flat, Greater London

“The steps were straightforward and I felt confident I wasn’t missing hidden fees. I switched to a fixed tariff for peace of mind over winter.”

Family home, Yorkshire

Trust check: always confirm tariff details during application, including prices, contract term, and any exit fees. Energy tariffs can change, and availability depends on your postcode and meter setup.

Check the cheapest energy tariff in your postcode

Get December 2025 whole-of-market home energy prices matched to your region, meter type and payment method.

Postcode-tailored tariff availability
Fixed and variable options
Clear rates and estimated costs

Start your comparison

Takes around 2 minutes. For UK household energy only.

Back to Local Home Energy

Updated on 24 Dec 2025