Cheapest fixed energy tariff switch now (UK guide)

Find the lowest estimated-priced fixed deals available for your home right now — based on your postcode, meter type and payment method. Compare whole-of-market options and switch with clear, UK-specific caveats.

  • See whether fixing is cheaper than the price cap for your setup (not a national average)
  • Understand exit fees, smart/prepay constraints and fixed-term risks before you switch
  • Get a personalised quote in minutes — no promises, just transparent estimates
Get your fixed tariff quotes How we assess “cheapest”

Estimates only. Availability and prices vary by region, payment method, meter type and credit checks. Fixes may include exit fees.

Fast answer: what’s the cheapest fixed tariff to switch to now?

In the UK, the cheapest fixed energy tariff is the deal with the lowest estimated annual cost for your home after accounting for your region (distribution area), payment method, meter type (smart, standard, economy 7, prepay) and expected usage. There isn’t one universal “cheapest” fixed tariff for everyone.

Key point: A fixed deal that looks cheapest on a headline unit rate can still cost more once you include standing charges, time-of-use splits (Economy 7), or if it has exit fees and you might need to leave early.

When fixing can be cheapest

  • You find a fix that’s below your current tariff’s estimated annual cost
  • You value bill certainty for 12–24 months
  • You’re happy to accept potential exit fees

When fixing may not suit

  • You might move home soon
  • You’re on prepay and have limited fixed options
  • You expect to reduce usage significantly (e.g., heat pump install)

What to check first

  • Exit fees (per fuel, per account)
  • How long the fix lasts
  • Direct Debit vs prepay pricing
  • Economy 7 day/night rates

If you want the cheapest fixed deal you can actually switch to today, get a quote using your postcode and a few details.

Start your comparison

Compare fixed tariffs for your home

We’ll show fixed tariffs available in your area and highlight the lowest estimated annual cost based on the details you provide. You can then switch to the supplier you choose.

Tip: Have a recent bill to hand for your usage (kWh). If you don’t, we can use typical consumption as a starting point and you can refine later.

What we’ll use to find “cheapest”

Postcode & region
Determines your distribution area, which affects standing charges and unit rates.
Payment method
Direct Debit (monthly) is often cheapest. Prepay can be different and may have fewer fixed options.
Meter type
Standard, smart, Economy 7, and prepayment meters can change deal eligibility and pricing.

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Enter your details to see fixed tariffs available in your area. We’ll contact you only about your comparison and switch.

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By submitting, you confirm this is for a UK home energy comparison. We’ll use your details to provide quotes and contact you about your comparison. You can opt out at any time.

Switching rights: If you’re switching supplier, you typically have a 14-day cooling-off period for distance sales. Some energy supply begins after this; terms vary by supplier.

How to compare fixed tariffs (and spot the true cheapest)

The cheapest fixed tariff is usually the one with the lowest estimated annual cost for your consumption — not the lowest unit rate in isolation. Use the table below as a practical checklist of what to compare.

What you’re comparing Why it matters for “cheapest” What to look for
Estimated annual cost Most reliable single number for total cost, combining standing charge + unit rates. Based on your kWh, not a generic national average.
Standing charge High standing charges can outweigh a low unit rate, especially for low users. Compare per-fuel (electricity and gas) and by region.
Unit rate(s) Your usage pattern determines whether a low unit rate saves you money. Economy 7: check both day and night rates and your split.
Fixed term length Longer fixes can bring certainty but reduce flexibility. 12 months is common; 24 months can suit if you want stability.
Exit fees A tariff can be “cheapest” now but expensive to leave if prices fall. Check per fuel and whether they reduce near the end of term (varies).
Eligibility & payment rules Some deals are Direct Debit-only or exclude prepay / certain meter setups. Confirm meter type, debt flags, and credit check requirements.

Decision checklist: is a fixed tariff right now right for you?

  • I want price certainty for budgeting (even if prices later drop)
  • I’m likely to stay put (or I’ve checked exit fees and I’m comfortable)
  • I’ve checked my meter type and payment method match the deal
  • I know my usage (or I’m happy to start with a reasonable estimate)
  • I’m comparing total cost (standing charge + unit rate), not just the headline rate

Two realistic scenarios (with numbers)

These examples show how “cheapest” depends on usage and standing charges. Figures are illustrative estimates only.

Scenario A: low user, electricity-only flat

  • Usage: 1,800 kWh electricity/year (no gas)
  • Deal 1 (low unit rate, higher standing): 24p/kWh + 65p/day
  • Deal 2 (slightly higher unit, lower standing): 26p/kWh + 45p/day

Estimated annual cost:
Deal 1: (1,800×£0.24)=£432 + (365×£0.65)=£237.25 → £669.25
Deal 2: (1,800×£0.26)=£468 + (365×£0.45)=£164.25 → £632.25
Cheaper overall: Deal 2 (because standing charge dominates for low users).

Scenario B: typical dual fuel home on Direct Debit

  • Usage: 2,900 kWh electricity/year and 12,000 kWh gas/year
  • Fix A: Elec 25p/kWh + 55p/day; Gas 6.5p/kWh + 32p/day
  • Fix B: Elec 23.8p/kWh + 62p/day; Gas 6.9p/kWh + 30p/day

Estimated annual cost:
Fix A elec: (2,900×£0.25)=£725 + (365×£0.55)=£200.75 → £925.75
Fix A gas: (12,000×£0.065)=£780 + (365×£0.32)=£116.80 → £896.80
Fix A total: £1,822.55
Fix B elec: (2,900×£0.238)=£690.20 + (365×£0.62)=£226.30 → £916.50
Fix B gas: (12,000×£0.069)=£828 + (365×£0.30)=£109.50 → £937.50
Fix B total: £1,854.00
Cheaper overall: Fix A (gas unit rate difference outweighs electricity savings).

These examples exclude VAT changes (domestic energy is typically 5% VAT), discounts, and any one-off credits. Actual quotes vary by supplier and region.

Costs, exclusions and common pitfalls (UK-specific)

Fixed tariffs can be great for certainty — but the cheapest-looking option can disappoint if these points aren’t checked.

1) Exit fees & moving home

Many fixes charge exit fees (often per fuel). If you might move, check whether the supplier lets you transfer the tariff to your new address or charges to leave.

2) Economy 7 mismatches

Two-rate tariffs depend on your day/night split. If most use is daytime, a “cheap night” deal can cost more overall.

3) Prepay limitations

Prepayment customers may see fewer fixed deals, and some suppliers require smart prepay meters. If you’re in debt to your current supplier, switching may be restricted.

Direct Debit vs pay-on-receipt

Some tariffs are priced assuming monthly Direct Debit. If you prefer to pay on receipt, the cheapest deal may change.

Check: “Payment method” on the tariff details and whether prices are different for each method.

Standing charges can rise in your region

Standing charges and unit rates vary by region and can be higher in some areas. Always compare using your postcode, not social media screenshots of “cheap” deals.

Important: If you’re currently on a fixed tariff, check whether you’ll pay exit fees to leave. Any savings from a cheaper fix should be weighed against those fees.

FAQs: cheapest fixed tariff switching in the UK

1) Is a fixed tariff always cheaper than the Ofgem price cap?

No. The price cap limits what suppliers can charge for default tariffs (like standard variable), but fixed deals can be above or below it. “Cheapest” depends on your region, usage, meter type and payment method.

2) Can I switch fixed tariffs if I have a smart meter?

Usually yes. A smart meter doesn’t stop you switching supplier. However, some smart features may be temporarily limited until the meter fully interoperates with the new supplier (this has improved over time).

3) What if I’m on a prepayment meter?

You can still switch, but the number of fixed options may be smaller. If you owe your current supplier money, switching can be restricted (rules vary). Some suppliers require smart prepay for certain tariffs.

4) How long does an energy switch take in the UK?

Timescales vary by supplier and circumstances. Many switches complete within days to a few weeks. You should not be left without energy during a supplier switch.

5) Will I pay exit fees if I switch now?

If you’re currently in a fixed term, you may pay exit fees for leaving early (often per fuel). If you’re on a standard variable tariff, exit fees usually don’t apply, but always check your current tariff details.

6) What details change which fixed tariffs I can get?

Common factors include your postcode (region), payment method (Direct Debit vs pay-on-receipt vs prepay), meter type (standard, smart, Economy 7), and whether you want dual fuel or electricity-only.

7) What’s the difference between a fixed tariff and a tracker tariff?

A fixed tariff keeps unit rates and standing charges set for the term (subject to the tariff’s terms). A tracker moves in line with a reference (set by the supplier’s rules), so your price can rise or fall during the term.

8) Can landlords choose my tariff if I rent?

If you pay the energy bills, you can usually choose the supplier. If bills are included in rent, the landlord may choose. If you’re unsure, check your tenancy agreement.

Want a personalised answer for your address? Use the quote form above to see current fixed tariffs available in your area.

How we assess “cheapest fixed tariff” (methodology)

We focus on what most households mean by “cheapest”: the lowest estimated annual cost for a like-for-like tariff, for the user’s postcode and circumstances.

Our assumptions (and what you can change)

  • Region: based on your postcode distribution area
  • Payment method: we compare like-for-like (e.g., Direct Debit tariffs against Direct Debit tariffs)
  • Usage: your kWh if provided; otherwise a starting estimate (you can refine)
  • VAT: domestic energy is typically priced including 5% VAT (supplier presentation varies)
  • Dual fuel: we show electricity-only and dual fuel where available; cheapest can differ

Limitations (important)

  • Prices move: suppliers can change tariffs and withdraw deals
  • Eligibility varies: credit checks, meter compatibility and payment rules can affect what you can take
  • Exit fees: “cheapest now” may not be “cheapest overall” if you leave early
  • Special tariffs: time-of-use and EV tariffs can be excellent for some households but require accurate usage splits
Editorial independence: This guide explains how to choose and compare fixed tariffs. Your final price and contract terms are set by the supplier you select.

Trust & page details

Reviewed by
Energy Specialist
Last updated
May 2026

Sources (UK)

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Updated on 19 May 2026