Cheapest fixed energy tariff in the UK tonight (how to find it)
Fixed deals can look “cheap” for some homes and expensive for others. Use this guide to check what “cheapest” means for your meter, region and payment type—and compare whole-of-market quotes in minutes.
- See what affects the cheapest fixed tariff: region, meter type, payment method and usage
- Understand unit rates, standing charges, exit fees and eligibility before you switch
- Get a personalised quote (not a generic national headline price)
Prices and availability can change daily and vary by postcode, meter type and payment method. All costs shown are estimated examples, not guarantees.
Fast answer: the “cheapest fixed tariff tonight” is the cheapest for your postcode, meter and payment type
In the UK, fixed tariffs aren’t one-size-fits-all. Suppliers set different unit rates (p/kWh) and standing charges (p/day) by region, and they can price differently for Direct Debit vs prepayment, and for smart meters vs traditional meters.
If you only look at a headline “£/year” figure online, you may miss a deal with a lower standing charge (better for low users) or a lower unit rate (better for high users). The best way to check tonight is to compare based on your actual usage and postcode.
Key takeaways (quick scan)
- Cheapest fixed = lowest estimated annual cost for you, not necessarily the lowest unit rate.
- Standing charge matters—especially if you use less energy or are away from home a lot.
- Check exit fees and the fix length (often 12–24 months). A “cheap” fix can be costly to leave.
- Eligibility can exclude you (e.g., some tariffs require a smart meter, online-only billing, or Direct Debit).
- Price cap context: the Ofgem price cap applies to standard variable tariffs (SVTs), not fixed deals—fixes can be above or below it.
Compare fixed tariffs tonight (whole-of-market)
Tell us the basics and we’ll match you with fixed deals available for your home. You’ll see estimated costs based on tariff rates and your details, so you can spot the best value—not just the loudest advertised price.
Tip: If you have a recent bill, keep it handy. Knowing whether you’re on a single-rate meter or Economy 7 can change which tariff is cheapest.
What you’ll need (2 minutes)
- Postcode (for regional pricing)
- Contact details (to send your quote and next steps)
- Optional: current supplier and tariff end date (helps avoid exit fees)
Get your quote
We’ll use your postcode to show tariffs available where you live. No obligation to switch.
How to check what’s actually cheapest tonight (step-by-step)
- Start with your meter type: single-rate electricity, Economy 7, smart prepay, traditional prepay, or gas-only/electricity-only. Economy 7 users often need a specific tariff to be “cheap”.
- Use your postcode: standing charges and unit rates differ across Great Britain regions (and tariffs differ in Northern Ireland). A deal that’s cheapest in one region may not be elsewhere.
- Compare estimated annual cost using your usage: if you know your kWh from bills, use them. If not, use realistic estimates—and be ready to sanity-check the result.
- Check the contract details: tariff length, exit fees, any discounts that can end, and whether prices are truly fixed (some “fixed” deals can still change in limited circumstances—always read T&Cs).
- Confirm payment method: Direct Debit tariffs can be cheaper than pay-on-receipt. Prepayment choices are different and may require a compatible smart meter.
- Decide if you need flexibility: if you might move home or change meter soon, a “cheap” fix with a high exit fee may not be good value.
Fixed vs variable: which is “cheapest” depends on why you’re fixing
A fixed tariff gives price certainty for the agreed term. A standard variable tariff (SVT) can change—often when the Ofgem price cap updates. The table below helps you decide what to compare tonight.
| What you’re comparing | Fixed tariff | SVT / variable | What to watch tonight |
|---|---|---|---|
| Unit rate (p/kWh) | Usually fixed for the term (see T&Cs) | Can change over time | Compare electricity and gas separately; Economy 7 has day/night rates |
| Standing charge (p/day) | Often fixed, but varies by region | Set within cap limits and can change | Low users should prioritise a lower standing charge where possible |
| Exit fees | Common (especially longer fixes) | Typically none | If you may move or switch again soon, check fees first |
| Eligibility | May require DD, online billing, smart meter | Broader | Prepay and Economy 7 choices can be narrower |
| Budget certainty | Higher (rates fixed for term) | Lower | A slightly higher fix might still suit if you value predictability |
Decision checklist: a fixed tariff usually suits you if…
- You want predictable rates for budgeting over 12–24 months
- You’re happy to commit and you’ve checked exit fees
- You’ve compared estimated annual cost using your typical kWh
- You qualify for the payment method/meter requirements
A fixed tariff may not suit you if…
- You expect to move home soon (tenants especially) and may face exit fees
- Your usage is about to change a lot (e.g., new baby, working from home, heat pump)
- You’re on Economy 7 but can’t shift usage to the night rate
- You need maximum flexibility and don’t want contract commitments
Two realistic scenarios (with numbers you can sanity-check)
These are illustrative examples using simplified assumptions to show why the “cheapest fixed tariff” can differ between households. Your quote depends on your postcode, tariff availability, standing charges, meter type and usage.
Scenario A: Low-use flat (electricity only)
- Assumptions
- 1,800 kWh/year electricity; single-rate meter; pays by Direct Debit.
- Tariff 1 (low standing charge)
- Unit rate 27.0p/kWh; standing charge 40p/day.
- Tariff 2 (lower unit rate)
- Unit rate 25.5p/kWh; standing charge 60p/day.
- Estimated annual cost (electricity only)
- Tariff 1: (1,800×£0.27) + (365×£0.40) ≈ £632
Tariff 2: (1,800×£0.255) + (365×£0.60) ≈ £678
For lower users, a lower standing charge can outweigh a slightly higher unit rate.
Scenario B: Family home (dual fuel, higher use)
- Assumptions
- 3,600 kWh/year electricity + 12,000 kWh/year gas; pays by Direct Debit.
- Tariff 1
- Elec 27.0p/kWh, 50p/day; Gas 6.5p/kWh, 30p/day.
- Tariff 2 (lower unit rates)
- Elec 25.5p/kWh, 55p/day; Gas 6.0p/kWh, 33p/day.
- Estimated annual cost (dual fuel)
- Tariff 1: (3,600×£0.27)+(365×£0.50) + (12,000×£0.065)+(365×£0.30) ≈ £1,247
Tariff 2: (3,600×£0.255)+(365×£0.55) + (12,000×£0.06)+(365×£0.33) ≈ £1,159
For higher users, lower unit rates often make a bigger difference—even if standing charges are a bit higher.
Math note: costs exclude VAT rounding and any additional discounts/credits. Tariff structures can include different standing charges for gas and electricity. Always check the supplier’s tariff information label (TIL) for the official figures.
Costs, exclusions and common pitfalls (what to check before you fix)
1) Exit fees and switching timing
Many fixed tariffs charge an exit fee if you leave early. If your current deal ends soon, it may be cheaper to wait—unless rates are meaningfully higher on your current tariff.
If you’re within your supplier’s allowed switching window near the end of a fix, you may be able to switch without an exit fee (rules vary). Check your supplier account or call them to confirm.
2) Meter type: Economy 7, smart, prepayment
Some fixed tariffs are only available for certain meters. Economy 7 needs the right day/night rates to be competitive. Smart prepay tariffs may require a compatible smart meter setup.
3) Payment method and credit checks
The cheapest fixed deals are often for monthly Direct Debit. Some suppliers may run a credit check for certain payment methods or tariffs.
4) Standing charges can dominate your bill
A tariff can look cheap on unit rate but have a higher standing charge. If you use less energy (or have a small household), that can push the annual cost up.
5) Dual fuel discounts aren’t always best
Some suppliers price electricity and gas competitively only when bundled, but not always. The cheapest overall setup can sometimes be separate suppliers (availability varies).
6) Northern Ireland vs Great Britain
Northern Ireland’s market works differently to Great Britain’s (England, Scotland and Wales). If you’re in NI, your available suppliers and tariff structures can differ.
Consumer safety note: You should receive clear information like unit rates, standing charges, contract length and any exit fees before you agree to switch. If anything is unclear, ask for the tariff information label (TIL) or supplier terms in writing.
FAQs: cheapest fixed energy tariff (UK)
1) Can you tell me the single cheapest fixed tariff in the UK tonight?
Not accurately, because “cheapest” varies by postcode (region), meter type, payment method and your kWh usage. The practical way is to compare personalised quotes for your home.
2) Is a fixed tariff always cheaper than the Ofgem price cap?
No. The Ofgem price cap mainly limits rates on standard variable tariffs. Fixed deals can be priced above or below SVT levels depending on wholesale costs and supplier strategy.
3) What matters more: unit rate or standing charge?
It depends on usage. If you use less energy, standing charge can make up a large share of your bill. If you use more, unit rate tends to drive total cost. Compare using estimated annual cost based on your kWh.
4) Do I need a smart meter to get the cheapest fixed deal?
Not always. Some deals are open to any meter; others are smart-meter-only (especially smart prepay or time-of-use tariffs). If you’re unsure, compare deals filtered to your meter type.
5) I rent—can I switch to a fixed tariff?
Usually yes, as long as you pay the energy bills and your name is on the account. If bills are included in rent or the landlord is the account holder, you typically can’t switch. Also check exit fees if you may move.
6) Can I fix if I’m in debt to my current supplier?
It may be harder. Some debts can block a switch, and rules can differ for prepayment meters and repayment plans. If you’re in difficulty, get free help from a trusted advice service before switching.
7) How long does switching take in the UK?
Switching times can vary by supplier and circumstances. In many cases it can complete within a few working days, but it may take longer if there are meter or account issues to resolve.
8) Will my supply be interrupted if I switch?
No—your gas and electricity still come through the same pipes and wires. You’re changing who bills you, not the physical supply.
9) What if the cheapest tariff is from a supplier I’ve never heard of?
Check customer service track record, billing options, and contract terms (exit fees, how they handle refunds/credit balances). You can also look at official guidance on switching and consumer protections.
10) Does “fixed” mean my monthly Direct Debit won’t change?
Not necessarily. Fixed refers to the tariff rates; your monthly payment can still change if your supplier reviews your account based on usage, seasonal patterns, or a balance build-up/shortfall.
Trust, editorial standards and transparency
- Written by
- EnergyPlus Editorial Team
- Reviewed by
- Energy Specialist
- Last updated
- May 2026
Editorial note: We don’t claim a single “cheapest fixed tariff” applies to everyone. Our aim is to help you identify the cheapest option available for your household and preferences tonight, with clear caveats.
How we assess “cheapest” (methodology)
When we say “cheapest fixed tariff tonight”, we mean: the fixed tariff(s) available to you that produce the lowest estimated annual cost given your details.
What we consider
- Availability by postcode/region (standing charges and unit rates vary across Great Britain)
- Meter type (single-rate, Economy 7, prepayment, smart)
- Payment method (e.g., monthly Direct Debit vs other options)
- Tariff term (e.g., 12 vs 24 months)
- Fees and restrictions (exit fees, smart-meter requirements, online-only billing)
Limitations (important)
- Tariffs can be added/withdrawn and repriced quickly, so “tonight” is time-sensitive.
- Estimated costs depend on your usage. If your kWh is off, the “cheapest” result can change.
- Some tariffs have features that change value by household (e.g., app-only support, bundled services).
- Price cap comparisons can be complex; the cap affects SVT pricing and varies by region and payment type.
Sources and further reading (UK)
- Ofgem: Energy price cap
- Citizens Advice: Energy supply and switching guidance
- GOV.UK: Energy information and support
- Ofgem: Back-billing rules
We link to official regulators and advice bodies for policy and consumer-rights context. Tariff pricing and eligibility always come from suppliers’ official tariff documents and your quote results.
Ready to check the cheapest fixed tariff for your home tonight?
Get a personalised comparison based on your postcode and details—then review exit fees, term length and eligibility before you switch.
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