Cheapest fixed energy tariff for a flat in the UK (what to look for now)

Quick checklist: who a fixed tariff suits

• You want predictable bills for budgeting (especially over winter).
• You’re happy to commit for a set term and accept possible exit fees.
• You’ve checked your meter type and the tariff matches it (e.g. Economy 7).
• You’re likely to stay at the address for most of the fix period.

Who it may not suit (or needs extra care)

• You may move soon (check exit fees and moving-home policies).
• Your usage is hard to predict (recently moved in, renovation, new appliance).
• You’re on a heat network or have landlord-supplied heating/electricity.
• You have a prepayment meter and the fix requires a different payment method.

What is the cheapest fixed energy tariff for a flat in the UK right now?

It’s the fixed tariff that produces the lowest estimated annual cost for your specific postcode, meter type and payment method. There isn’t one national “cheapest” deal for flats because regional charges and eligibility rules change prices and availability.

Is it better to fix or stay on a variable tariff in a flat?

Fixing can help with budgeting because your unit rates and standing charges are set for the term, but it may come with exit fees and you could miss out if prices fall. Variable tariffs can be more flexible. Compare both using your usage and check the terms.

Do renters in flats have the right to switch energy supplier?

Usually, yes — if you pay the bill and have your own meter, you can normally choose your supplier. Exceptions can include some bills included in rent, landlord-managed supplies, or communal/heat-network arrangements where you don’t hold the supply contract.

How do standing charges affect the cheapest tariff for a low-usage flat?

Standing charges are paid daily regardless of usage, so they can form a large share of total bills in smaller flats. That’s why the cheapest deal for low usage is often the one with the lowest total annual estimate — not necessarily the lowest unit rate.

Can I get a fixed tariff if I have a prepayment meter?

Sometimes. Availability varies by supplier, region and meter type, and some fixed deals may require a credit meter or Direct Debit. If you’re on prepay, compare using your current payment method first and check any eligibility conditions before applying.

What should I check before choosing a fixed energy tariff?

Check your meter type (single-rate or Economy 7), payment method assumptions, contract length, exit fees, and what happens when the fix ends. Use your annual kWh from a recent bill if possible, then compare by estimated annual cost for your postcode.

Will switching fixed tariffs interrupt my supply?

In normal domestic switching, your gas and electricity supply should not be interrupted — it’s an administrative change. You’ll usually need to provide meter readings around the switch date so your old and new suppliers can bill you accurately.

I have Economy 7 in my flat — how do I know if it’s worth keeping?

Economy 7 tends to suit households that use a meaningful share of electricity overnight (often with storage heaters or timed hot water). If most of your use is daytime, a single-rate tariff can be cheaper. Use your bill (day vs night kWh) to compare accurately.

Our definition of “cheapest”

We treat “cheapest” as the lowest estimated annual cost for a household’s stated usage and tariff eligibility (postcode/region, meter type and payment method). For flats, we place extra emphasis on standing charges and multi-rate suitability.

Assumptions (and why they matter)

• Usage: your annual kWh is the key driver of which tariff is cheapest.
• Region: network charges vary across Great Britain.
• Meter type: Economy 7 and prepay can limit or change available options.

Limitations (transparency)

We don’t publish a static list of cheapest fixed tariffs or specific unit rates because tariffs change and differ by postcode. The quote journey is where live prices appear. Always verify exit fees, eligibility and the tariff end date before switching.