Cheapest fixed energy tariff deals in the UK this month
Find competitively priced fixed deals available to UK households right now, with clear caveats on who qualifies, what “cheap” really means, and how to compare like-for-like before you switch.
- Whole-of-market comparison: fixed deals from multiple suppliers (availability varies by region and meter type)
- See what affects price most: payment method, unit rates, standing charges, and exit fees
- Get an estimated quote for your home in minutes (no promises—just transparent comparisons)
Estimates use your details (or typical-use assumptions where stated). Prices and availability can change daily and vary by region, meter type and payment method.
Fast answer: what counts as the cheapest fixed tariff this month?
For most UK households, the “cheapest fixed energy tariff” is the lowest estimated annual cost for your home when you compare:
- Unit rates (p/kWh) for electricity and/or gas
- Standing charges (p/day) for each fuel
- Any fixed-term discount or credit (if offered) and its conditions
- Exit fees (what you could pay if you leave early)
Important: There isn’t one nationwide “cheapest” fixed deal for everyone. Prices vary by postcode region, meter type (credit vs prepayment vs smart), payment method (Direct Debit vs receipt of bill), and whether you’re dual fuel or single fuel.
Key takeaways
- Compare by annual cost, not just unit rate.
- Check exit fees before fixing (often per fuel).
- Standing charges can dominate if you use little energy.
- Prepayment/smart meters can have different tariffs and availability.
Who a fixed deal can suit
- You want price certainty for a set term (often 12–24 months).
- You’d rather avoid frequent price changes on a variable tariff.
- You’re happy to stay put (or accept potential exit fees).
Who it may not suit
- You might move home during the term.
- You want maximum flexibility (no exit fees).
- You’re on a complex meter setup (e.g., Economy 7) and need specialist matching.
If you want the cheapest fixed deal for your exact address, the quickest route is to run a quote using your postcode, meter type and (ideally) your annual usage from a bill.
Compare fixed tariffs (whole-of-market)
Tell us a few basics and we’ll show estimated fixed tariff costs you’re eligible for, based on your postcode region and meter/payment details. You’ll be able to compare by annual cost, term length and exit fees.
Tip: For the most accurate “cheapest” result, use your annual kWh usage from your latest bill (electricity and gas). If you don’t have it, we can still estimate using typical use assumptions (explained in our methodology).
Two realistic examples (with numbers)
Scenario A: small flat, low usage (electric-only)
- Profile: 1–2 bed flat, electricity only, credit meter, monthly Direct Debit
- Assumed annual electricity use: 1,800 kWh
- Example tariff options (illustrative):
| Option | Standing (p/day) | Unit (p/kWh) |
|---|---|---|
| Fixed 12m A | 60 | 24.0 |
| Fixed 12m B | 45 | 25.5 |
Estimated annual cost (electricity only):
- Fixed 12m A: (0.60×365)=£219 + (0.24×1,800)=£432 → ~£651/year
- Fixed 12m B: (0.45×365)=£164 + (0.255×1,800)=£459 → ~£623/year
Even with a higher unit rate, a lower standing charge can win for low usage homes.
Scenario B: family home, dual fuel, higher usage
- Profile: 3–4 bed house, gas + electricity, credit meters, monthly Direct Debit
- Assumed annual use: Electric 3,100 kWh + Gas 12,000 kWh
- Example fixed deal (illustrative):
| Fuel | Standing (p/day) | Unit (p/kWh) |
|---|---|---|
| Electric | 55 | 23.5 |
| Gas | 30 | 6.2 |
Estimated annual cost:
- Electric: (0.55×365)=£201 + (0.235×3,100)=£729 → ~£930/year
- Gas: (0.30×365)=£110 + (0.062×12,000)=£744 → ~£854/year
- Total dual fuel estimate: ~£1,784/year
A small difference in gas unit rate can move the annual total significantly for higher usage homes.
These examples are illustrative (to show how “cheap” is calculated). Your actual cheapest fixed deal depends on your region, supplier availability, meter setup and current market pricing.
Get your fixed tariff quote
We’ll use your details to provide an estimated comparison and help you identify competitive fixed deals. We may contact you to confirm meter type and eligibility.
Eligibility reminder: Some fixed tariffs are only available for certain meter types (e.g., smart prepayment) or to customers who can pay by monthly Direct Debit.
Compare fixed tariffs properly (what to look at)
“Cheapest” is only meaningful if you compare fixed deals on the same basis. Use this table to sanity-check what you’re seeing in any quote results.
| What you’re comparing | Why it matters | What to check on the tariff |
|---|---|---|
| Estimated annual cost | Best single “bottom line” for your usage pattern. | Is it based on your kWh or a “typical use” figure? |
| Unit rates (p/kWh) | Drives cost for medium/high usage homes. | Electric + gas rates; Economy 7 day/night if relevant. |
| Standing charges (p/day) | Big factor for low usage or single-fuel homes. | Per fuel; varies by region and meter type. |
| Exit fees | Can outweigh savings if you leave early or find a better deal soon. | Amount per fuel; any fee-free window near end of term. |
| Payment method | Some tariffs price differently for Direct Debit vs pay on receipt. | Monthly Direct Debit, cash/cheque, variable Direct Debit, prepay. |
| Meter compatibility | Not every deal is available for every meter (smart, prepay, Economy 7). | Any restrictions or required meter exchange. |
Quick decision checklist
- Pick a fixed deal if…
- You value predictability, and the exit fees are acceptable for your circumstances.
- Be cautious if…
- You may move home, expect a meter change, or are unsure about Economy 7 usage split.
- Always confirm…
- Standing charge, unit rates, term length, exit fees, and when the fixed period ends.
What to gather before you compare
- Postcode and address
- Current supplier and tariff name (if you know it)
- Annual usage in kWh (both fuels) from your bill or online account
- Meter type: credit / smart / prepayment / Economy 7
- Preferred payment method (especially Direct Debit)
If you rent
You can usually switch energy supplier if you pay the bills and the energy account is in your name. If your landlord includes bills in rent, you typically can’t switch (because you’re not the account holder).
Costs, exclusions and common pitfalls (fixed deals)
1) Exit fees can change the “best” deal
If a fixed tariff charges (for example) £50 per fuel to leave early, that’s potentially £100 for dual fuel. If you think you might switch again soon, weigh the fee against any estimated saving.
2) Standing charge can outweigh a cheaper unit rate
Homes with low usage (small flats, single occupants, second homes) can pay more overall on a tariff with a lower unit rate but higher standing charge.
3) Economy 7 and multi-rate meters
Economy 7 tariffs have day/night rates. A “cheap” deal depends on your night-use share (e.g., storage heaters, EV charging). If your usage is mostly daytime, an Economy 7 tariff may cost more.
4) Prepayment meter availability
Some fixed deals aren’t offered for prepayment meters, and rates can differ from credit meters. If you’re on prepay, ensure the quote is matched to your meter type (smart prepay vs traditional key/card).
5) Debt and switching
If you owe money to your current supplier, switching may be restricted (especially on prepayment). You may still be able to switch in some cases—get advice before applying.
6) Fixed term vs fixed price
A tariff can be “fixed term” but not fully “fixed price” (for example, some charges may change in specific circumstances). Always read the tariff information and terms.
If you’re in financial difficulty: consider getting independent help first. Citizens Advice has guidance on dealing with energy bills and supplier issues.
FAQs: cheapest fixed energy tariffs (UK)
Are fixed tariffs always cheaper than variable?
No. A fixed tariff can be cheaper, similar, or more expensive than a variable tariff depending on market pricing at the time you switch and the tariff’s standing charge/unit rates. Fixing mainly gives price certainty for the term (subject to the tariff’s terms).
What term length is usually best: 12, 18 or 24 months?
It depends on your priorities. A longer fix can mean longer certainty, but may come with higher exit fees or less flexibility. Compare the estimated annual cost and check the total cost over the whole term where available.
Will my prices change during a fixed deal?
A fixed tariff generally fixes unit rates and standing charges for the term, but always read the tariff terms. Certain changes (for example, VAT changes or regulatory changes) can affect what you pay.
Do I need a smart meter to get the cheapest fixed tariffs?
Not always. Some tariffs are available to standard credit meters; others are restricted to smart meters or smart prepayment. If a deal requires a smart meter exchange, confirm whether there are any appointment timescales or constraints.
Can I switch if I’m renting?
Usually yes, if you’re responsible for paying the bills and the account is in your name. If bills are included in rent and the supplier account isn’t yours, you typically can’t switch.
What happens at the end of a fixed tariff?
You’ll normally move onto your supplier’s standard variable tariff (SVT) unless you choose a new fix or switch. Many suppliers allow a fee-free switch in a window near the end of the term—check the tariff terms.
Is it cheaper to go dual fuel?
Sometimes, but not always. Dual fuel can be convenient and may offer a lower combined cost, but the best approach is to compare the total annual estimate. In some cases, separate suppliers for gas and electricity can work out cheaper.
How long does switching take in the UK?
Switching is often completed within a few working days for many customers, but timings can vary depending on supplier processes, meter details, and whether there are any account issues to resolve.
Trust, methodology and sources
Page accountability
- Written by: EnergyPlus Editorial Team
- Reviewed by: Energy Specialist
- Last updated: April 2026
How we assess “cheapest”
We rank fixed tariffs by estimated annual cost for the customer’s inputs (postcode, meter type, payment method, usage where provided). Where usage isn’t supplied, we may use typical domestic consumption assumptions as a placeholder to show indicative costs.
Limitations (being transparent)
- Tariffs can change or be withdrawn quickly.
- Not all deals are available in all regions/meter types.
- Your bill also depends on actual kWh used (weather and behaviour).
- Some accounts require verification (address, meter point details).
What we include in the estimate
- Standing charge × 365 days (per fuel)
- Unit rate × annual usage (kWh) for each fuel
- Any clearly stated discounts/credits where applicable (subject to eligibility and terms)
We show key tariff terms (such as exit fees) alongside price so you can judge value, not just the headline figure.
Useful UK sources
- Ofgem (UK energy regulator) — guidance on switching, consumer protections and market rules.
- Citizens Advice: energy — help with bills, complaints and switching rights.
- GOV.UK: energy — official government information and support schemes.
Editorial note
This guide focuses on domestic (home) energy only. For the most reliable result, use your own kWh figures and confirm the tariff information before you switch.
Ready to see the cheapest fixed deal for your home?
Compare fixed tariffs by estimated annual cost, with exit fees and key terms shown clearly. Results vary by postcode region, meter type and payment method.
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