Cheapest gas and electricity tariff this winter (UK guide)

Key takeaway #1: compare total cost

A tariff with a slightly higher unit rate can still be cheaper overall if its standing charge is lower (especially for low-to-medium usage homes).

Key takeaway #2: fixed vs variable is a risk choice

A fixed tariff can protect you from price rises for the term, but may include exit fees. A variable tariff can change (up or down) and typically has no exit fee.

Key takeaway #3: your set-up matters

The cheapest option can differ if you have a prepayment meter, Economy 7, smart meter, or pay by Direct Debit versus on receipt of bill.

Compare winter tariffs (personalised to your home)

If you want the cheapest tariff for this winter, start with a like-for-like quote based on your postcode and meter set-up. That’s how you avoid misleading “from” prices.

Get your energy quote

Complete the form and we’ll use your details to help match you to suitable tariff options. Estimates only.

Decision checklist: who the cheapest fixed tariff often suits

• You want more predictable bills through winter (budget certainty matters).
• You expect to stay in the property for the tariff term.
• You’re comfortable with possible exit fees if you leave early.
• You’re comparing on estimated annual cost, not just the headline unit rate.

Who it may not suit (or needs extra checks)

• You might move soon, or you’re in temporary accommodation.
• You’re on a tight budget and a potential exit fee would be a problem.
• You have Economy 7 or prepay and the tariff assumes a different set-up.
• You’re on the Priority Services Register and want to confirm support continues after switching.

Exit fees on fixed tariffs

If you leave a fixed tariff early, you may pay an exit fee (often per fuel). Consider how likely you are to move or switch again before the end date.

Economy 7 / two-rate misunderstandings

Economy 7 works best if you use a meaningful share of electricity at night (e.g., storage heaters). If most use is daytime, a single-rate tariff can be cheaper.

Standing charges hit low usage

If you’re out a lot, live alone, or use little gas, standing charges can dominate your bill. Compare total cost, not only the cheapest unit rate.

Direct Debit amounts can change

Your supplier may review your monthly Direct Debit if your winter usage rises or you build debt/credit. A cheaper tariff doesn’t always mean a lower monthly payment immediately.

Prepayment differences

Prepay prices and availability can differ. Some deals are restricted by meter type or require a smart meter in prepay mode.

Intro offers and add-ons

Look out for tariff add-ons (e.g., boiler cover) that increase monthly cost. Make sure you’re comparing energy prices like-for-like.

Two realistic winter scenarios (with numbers)

These examples show how a tariff becomes “cheapest” based on usage and standing charge. They’re illustrative only — your rates depend on region, meter type and payment method.

A quick “cheap tariff” sense-check

1. Match the basics: same payment method and meter type.
2. Use your usage: kWh from bills if possible (or a realistic estimate).
3. Check the standing charge: both fuels.
4. Read the tariff facts: term length, exit fees, and any requirements (e.g., smart meter).
5. Plan for winter: if you fix, consider whether you can stay for the full term.

Is there one cheapest energy tariff in the UK?

No. The cheapest tariff varies by postcode (regional network costs), meter type (credit/prepay/Economy 7), payment method, and your usage. The best approach is to compare on estimated annual cost using your details.

Does the Ofgem price cap mean my bill is capped?

No. The cap limits the unit rate and standing charge suppliers can charge on standard variable tariffs for a typical customer profile. Your total bill depends on how much energy you use.

Is it cheaper to fix for winter?

It can be, but not always. Fixing is mainly about certainty. A fixed tariff may be priced above or below a variable tariff and can include exit fees. Compare estimated annual cost and consider how long you’ll stay at the property.

What if I’m on a prepayment meter?

You can still compare and switch, but tariff availability and pricing can differ. Some tariffs require a smart meter in prepay mode. Always confirm compatibility and any practical steps (e.g., topping up method) before switching.

Will switching affect my supply or cause downtime?

In most cases, switching supplier doesn’t interrupt your gas or electricity supply because the physical network stays the same. You’ll usually just get a final bill from your old supplier and start billing with the new one.

Do I need to switch gas and electricity together?

Not necessarily. Dual-fuel can be convenient and sometimes cheaper, but it’s worth checking if separate suppliers offer a lower combined estimated annual cost for your usage.

What details should I have before comparing?

Ideally: your postcode, current supplier and tariff name, whether you have Economy 7 or prepay, and your annual usage in kWh (from your bill or online account).

Can I switch if I owe money to my current supplier?

Sometimes, but it depends on the situation (and for prepayment meters there may be additional rules). If you’re in debt, speak to your supplier and consider getting free independent help before switching.

Page ownership

Written by

EnergyPlus Editorial Team

Reviewed by

Energy Specialist

Last updated

May 2026

How we assess “cheapest this winter”

We define “cheapest” as the tariff with the lowest estimated total cost over a year (or over the tariff term where applicable) for a household, based on:

• Unit rates for gas (p/kWh) and electricity (p/kWh), including day/night where relevant
• Standing charges (p/day) for each fuel
• Your usage (kWh), or a realistic estimate if exact usage isn’t available
• Region (postcode-based), because network costs vary across Great Britain
• Payment method (e.g., Direct Debit, on receipt of bill, prepay) and meter compatibility
• Tariff features such as exit fees, term length and eligibility requirements

Assumptions and limitations (important)

• Prices change: suppliers can withdraw or update tariffs; variable rates can change; the Ofgem cap updates periodically.
• Estimates vary: if you don’t have exact kWh, results may differ from your real bill.
• Not all homes are comparable: Economy 7, smart time-of-use, and prepay can change how “cheapest” is calculated.
• Discounts and bundles: non-energy add-ons (like services) can affect cost but may not suit everyone.
• Northern Ireland: energy markets and regulation differ. This page is focused on Great Britain unless stated otherwise.

Primary sources we reference

• Ofgem: Energy price cap
• Citizens Advice: Energy
• GOV.UK: Heating and benefits
• Ofgem: Priority Services Register