Cheapest electricity tariff in the UK for a one bedroom flat
Find the cheapest realistic tariff for your 1-bed flat by matching unit rate, standing charge and your meter type (credit, prepay or smart). We’ll show how to compare properly, with UK-specific examples and a quick quote form.
- Fast answer: for most 1-bed flats, the cheapest tariff is usually the one with the lowest estimated annual cost for your usage—often a fixed deal when available, but not always.
- Two key numbers matter: unit rate (p/kWh) and standing charge (p/day). Low users often benefit more from a lower standing charge.
- Results vary by region, meter, payment method and eligibility—so we show you how to check what’s truly cheapest for you.
Estimates use typical UK billing components (unit rate + standing charge) and example 1-bed-flat usage. Your exact cheapest tariff depends on postcode/region, meter type, payment method and supplier availability.
Fast answer: what’s the cheapest electricity tariff for a 1-bed flat?
There isn’t one single “cheapest electricity tariff” across the whole UK at all times. For a one bedroom flat, the cheapest option is usually the tariff with the lowest estimated annual cost for your exact situation—because:
If you’re a low user
A lower standing charge can matter as much as (or more than) a slightly lower unit rate. Many 1-bed flats have lower annual consumption, so standing charge is a bigger slice of the bill.
If you’re a higher user (e.g., electric heating)
A lower unit rate (p/kWh) usually wins, even if the standing charge is higher—because you’re buying more electricity over the year.
Key takeaway: The “cheapest tariff” is the one that produces the lowest estimated annual cost once you enter your postcode, meter type (credit / prepay / smart / Economy 7), and usage. Don’t choose on unit rate alone.
What to check in under 2 minutes
- Are you on single-rate or Economy 7?
- Is your flat all-electric (electric heating/hot water), or do you also have gas?
- Do you pay by Direct Debit or prepayment?
- Do you have (or can you get) a smart meter?
- Any exit fees on your current tariff?
Quick definitions (so comparisons make sense)
- Unit rate
- Price for each kWh you use.
- Standing charge
- Daily fixed cost, regardless of usage.
- Estimated annual cost
- Unit rate × your usage + standing charge × 365 (plus any extras/discount rules).
Compare tariffs for your flat (whole-of-market style)
To find the cheapest tariff for a one bedroom flat, the fastest route is to compare using the details that actually change prices in the UK:
1) Your postcode (region)
Standing charges and unit rates vary by distribution region. Two flats using the same kWh can see different prices in different parts of the UK.
2) Meter type & payment
Credit, smart, Economy 7, and prepayment tariffs can price differently. Make sure you compare like-for-like.
3) Your usage pattern
Low users should weigh standing charge heavily; Economy 7 users should check day vs night split.
Renters: You can usually switch supplier if you pay the energy bills and your name is on the account. If bills are included in rent, you typically can’t switch—ask your landlord/agent first.
What happens after you compare
- We use your details to estimate annual costs across available tariffs.
- You can sort by estimated annual cost, then check key terms (exit fees, tariff length, payment method).
- Switching is typically handled by the new supplier, and you keep your electricity supply during the process.
For switching guidance, Ofgem explains the UK switching process and timelines: Ofgem: getting a better energy deal.
Get personalised prices (quick form)
Fill in what you know—postcode and contact details are enough to start. We’ll use your info to help you compare options.
Compare tariff types for a one bedroom flat
You’ll see many named tariffs, but most fit into a handful of types. This table helps you decide what to look for when trying to find the cheapest electricity tariff for a 1-bed flat.
| Tariff type | What “cheap” usually means | Best for many 1-bed flats if… | Watch outs |
|---|---|---|---|
| Fixed (e.g., 12 months) | Lower estimated annual cost than the price cap tariff, plus bill predictability. | You value stability and there’s a competitive fix available in your region. | Exit fees; you might miss out if prices fall during your term. |
| Standard Variable (SVT / price cap) | Not usually the cheapest, but a baseline with no fixed end date. | You want flexibility (no exit fee) while you shop around. | Rates can change (often in line with the Ofgem price cap updates). |
| Prepayment (PAYG) | Cheapest can mean a lower unit rate than your current PAYG, plus manageable top-ups. | You’re on prepay and want a better deal without changing how you pay. | Debt collection through the meter; not all deals available on PAYG. |
| Economy 7 (two-rate) | “Cheap” depends on your night usage % and the day/night rate gap. | You can shift usage to off-peak (storage heaters, immersion, EV charging). | If you don’t use enough at night, bills can be higher than single-rate. |
| Time-of-use (smart meter TOU) | Low off-peak rates at certain times; sometimes higher peak rates. | You can avoid peak periods (e.g., run appliances overnight/afternoon). | Needs a smart meter; can be expensive if your usage is mostly peak-time. |
Decision checklist: what suits a 1-bed flat?
- Mostly out all day? A tariff with a very low standing charge may not always help if unit rates are high—compare totals.
- Work from home? Lower unit rate may matter more than standing charge if your usage is higher.
- All-electric heating/hot water? Consider Economy 7/TOU only if you can shift lots of kWh off-peak.
- Prepayment meter? Compare like-for-like PAYG deals first; then consider switching to credit only if it’s practical for you.
- Short tenancy? Look for no exit fee or shorter fixes, but still compare total cost.
Who it’s for / who it isn’t
Likely helpful if you: pay your own electricity, want to reduce bills, or suspect you’re on an expensive default tariff.
Less relevant if you: have bills included in rent/service charge, or your landlord controls the supply contract.
If you’re unsure about your rights to switch, Citizens Advice has clear guidance: Citizens Advice: energy supply advice.
Costs, exclusions and common pitfalls (1-bed flats)
Many “cheap tariff” mistakes happen because the comparison missed a constraint that’s common in flats—meter types, time-of-use, or tenancy length.
Pitfall: choosing on unit rate only
For low usage, a higher standing charge can cancel out a “cheap” unit rate. Always compare estimated annual cost.
Pitfall: Economy 7 without enough night use
Economy 7 can be great with storage heating/immersion, but if most use is daytime, a single-rate tariff may be cheaper.
Pitfall: forgetting exit fees & tenancy length
Some fixed tariffs have exit fees. If you might move soon, check whether the deal is worth it.
Two realistic scenarios (with numbers)
These examples show why “cheapest” depends on usage and standing charge. Numbers are illustrative estimates using simple bill maths (they are not a quote).
Scenario A: Typical low-use 1-bed flat
- Usage: 1,800 kWh/year (single-rate)
- Tariff 1: 26p/kWh, 60p/day
- Tariff 2: 28p/kWh, 45p/day
Estimated annual cost:
Tariff 1 ≈ (1,800×£0.26) + (365×£0.60) = £468 + £219 = £687
Tariff 2 ≈ (1,800×£0.28) + (365×£0.45) = £504 + £164 = £668
Even with a higher unit rate, the lower standing charge can win for low usage.
Scenario B: Higher-use flat (WFH / electric hot water)
- Usage: 3,500 kWh/year (single-rate)
- Tariff 1: 26p/kWh, 60p/day
- Tariff 2: 28p/kWh, 45p/day
Estimated annual cost:
Tariff 1 ≈ (3,500×£0.26) + (365×£0.60) = £910 + £219 = £1,129
Tariff 2 ≈ (3,500×£0.28) + (365×£0.45) = £980 + £164 = £1,144
At higher usage, the lower unit rate can matter more than the standing charge.
Important: Real tariffs can include different rates by region, payment method, and sometimes discounts/conditions. Use these calculations to sanity-check a comparison result—not as a promise of your final bill.
Other costs & constraints to check
- Exit fees: common on fixed deals; factor in if you may move.
- Payment method: some prices assume Direct Debit; paying on receipt of bill may cost more.
- Smart meter requirements: some time-of-use deals require a working smart meter in smart mode.
- Prepayment practicalities: top-up methods, emergency credit, and whether you can switch to credit (supplier checks may apply).
- Heat networks / communal supplies: if your building uses a heat network for heating/hot water, your electricity choice may still be switchable, but heating costs won’t be affected.
If you’re on a prepayment meter and need support, Citizens Advice explains help options: Citizens Advice: help paying energy bills.
FAQs: cheapest electricity for a 1-bed flat (UK)
1) What’s “normal” electricity usage for a one bedroom flat?
It varies a lot, but many 1-bed flats are relatively low usage compared with larger homes—unless the flat is all-electric (electric heating/hot water), in which case usage can be much higher. For comparisons, use your last 3–12 months of kWh if possible.
2) Is a fixed tariff always cheaper than the price cap tariff?
Not always. The Ofgem price cap limits what suppliers can charge on standard variable tariffs, but competitive fixed deals can be cheaper—or sometimes more expensive—depending on market conditions and your region. Always compare estimated annual cost and check exit fees.
3) Can I switch electricity supplier if I rent a flat?
Usually yes—if you pay the bills and you’re the account holder. If your tenancy includes bills, the supplier contract may be controlled by the landlord or managing agent. If in doubt, check your tenancy agreement and ask the landlord/agent.
4) I have Economy 7—should I move to a single-rate tariff?
Only if your usage doesn’t suit Economy 7. As a rough rule, Economy 7 tends to work best when a meaningful share of your electricity is used overnight (often due to storage heaters or timed hot water). If most usage is daytime, a single-rate tariff can be cheaper.
5) What’s the catch with tariffs that have a very low standing charge?
Sometimes a low standing charge is balanced by a higher unit rate, different payment assumptions, or eligibility conditions. Low standing charge can be great for low usage—but you must check the overall annual estimate for your kWh.
6) Do I need a smart meter to get the cheapest electricity tariff?
Not necessarily. Many competitive fixed and variable tariffs don’t require a smart meter. However, some time-of-use deals do require one to measure usage by time band.
7) Are prepayment tariffs always more expensive?
Not always, but fewer deals may be available. If you’re on prepay, compare PAYG options first. If you want to move to a credit meter, availability can depend on supplier checks and any outstanding debt arrangements.
8) Will switching affect my electricity supply?
No—your physical supply stays the same. The supplier changes who bills you. Ofgem provides guidance on what to expect when switching: Ofgem switching guidance.
Trust, methodology and sources
Page details
- Written by
- EnergyPlus Editorial Team
- Reviewed by
- Energy Specialist
- Last updated
- June 2026
How we assess “cheapest” for a 1-bed flat
We define the cheapest electricity tariff as the option with the lowest estimated annual cost for the same meter type and payment method, calculated using:
- Estimated annual electricity use (kWh) provided by the user or inferred from typical 1-bed-flat patterns (where the user hasn’t supplied kWh).
- Unit rate(s) (single-rate or day/night rates for Economy 7 or time-of-use where applicable).
- Standing charge (p/day) for the user’s region.
- Tariff terms that materially affect value (e.g., exit fees, contract length, eligibility like smart meter requirement).
Limitations: Prices change and availability differs by supplier, region, and customer circumstances (including credit checks for some payment options). The examples on this page are illustrative and do not represent a guaranteed offer.
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