Cheapest energy tariffs by postcode (UK) — this week
See which tariffs tend to come out cheapest in your area right now, and get a like-for-like quote in minutes. We explain why prices vary by postcode, what “cheap” really means, and the pitfalls to avoid.
- UK homes only (not business): compare electricity, gas or dual fuel
- Estimates reflect regional price caps, payment method and meter type
- Clear methodology + examples, with switching caveats
Estimates are indicative and change frequently. Your exact price depends on region, meter type, payment method, usage and supplier terms.
Fast answer: what’s usually “cheapest” in my postcode this week?
For most UK households, the cheapest tariff tends to be the option with the lowest estimated annual cost for your region and meter type — often a competitive fixed deal when available, or a strong variable tariff close to the Ofgem price cap when the market is tighter.
Important: Energy unit rates and standing charges can differ by postcode/region, payment method and meter type (standard, Economy 7, smart). A tariff that’s cheapest nationally may not be cheapest where you live.
What to do now
Compare using your postcode and (ideally) your kWh usage from a recent bill for a like-for-like estimate.
What “cheap” means
Look at total annual cost (unit rate + standing charge), plus exit fees, direct debit requirements, and any eligibility rules.
What can change the result
Economy 7 split, heat pumps/EV charging patterns, prepayment, and whether your supplier can support your meter configuration.
Compare the cheapest energy tariffs for your postcode
Enter your details to see estimated costs for tariffs available where you live. We’ll show options based on your meter type and payment method, then you can choose what suits you best.
Tip: If you can, use your annual usage (kWh) from a bill. If not, we’ll use standard Ofgem Typical Domestic Consumption Values (TDCVs) as a fallback estimate.
Why tariffs vary by postcode (UK regions)
Great Britain is split into electricity distribution regions (and gas regions) with different network costs. Those costs affect standing charges and sometimes unit rates, so the same supplier tariff can price differently in different postcodes.
- Network charges: local distribution costs vary by region.
- Meter type: standard single-rate, Economy 7/two-rate, smart tariffs (where supported).
- Payment method: Direct Debit vs cash/cheque; prepayment often differs.
- Eligibility: new-customer-only deals, online-only billing, smart meter requirement.
Tariff types you’ll see (and what they’re good for)
Fixed
Unit rate and standing charge are set for a term (e.g., 12 months). Useful for budgeting. Watch for exit fees and what happens at the end of the fix.
Variable (including price-capped)
Rates can change. Standard variable tariffs are influenced by the Ofgem price cap (where it applies). Often no exit fees, but prices may rise.
Economy 7 / two-rate
Cheaper night rate, higher day rate. Can be cheaper if you use a meaningful share overnight (e.g., storage heating, EV charging). Your split matters.
Smart / time-of-use
Prices can vary by time. These can be great for flexible use, but are not automatically “cheapest” for everyone and may require a compatible smart meter.
Get your like-for-like quote
We’ll use your postcode to match tariffs available in your area and estimate annual cost. No obligation to switch.
What you’ll need to compare accurately
- Annual usage (kWh)
- From a bill or online account. If unknown, we can estimate using Ofgem TDCVs.
- Meter type
- Single-rate, Economy 7/two-rate, or smart/time-of-use.
- Tariff end date (if fixed)
- So you can avoid early exit fees and time a switch.
Two realistic examples (with assumptions)
These show how postcode and usage can change which tariff looks cheapest. Numbers are illustrative estimates only.
Scenario A: 2-bed flat, electricity-only (standard meter)
- Postcode region: urban GB region (example only)
- Usage: 2,000 kWh/year electricity
- Payment: Monthly Direct Debit
Estimated outcome: A sharp fixed deal may look cheaper overall if its standing charge isn’t much higher than the best variable option. For low usage, a tariff with a slightly higher unit rate can still win if the standing charge is lower.
Illustrative example calculation: Tariff 1 (lower standing charge) might come out ~£60–£120/year cheaper than Tariff 2 in the same region depending on standing charge differences of ~10–20p/day.
Scenario B: 3-bed house, dual fuel (higher gas use)
- Postcode region: different GB region (example only)
- Usage: 2,900 kWh electricity + 12,000 kWh gas/year
- Payment: Monthly Direct Debit
Estimated outcome: For higher users, unit rates matter more. A tariff with a slightly higher standing charge can still be cheaper if its unit rates are materially lower, especially for gas.
Illustrative example calculation: A 1p/kWh gas difference across 12,000 kWh is ~£120/year, which can outweigh a £20–£50/year standing charge difference.
Caveat: Your exact figures depend on your region’s network charges, the tariff’s rates, and your actual usage pattern. If you have Economy 7, the day/night split can completely change the outcome.
Compare tariff types: what’s most likely to be cheapest for you?
Use this as a decision aid before you compare. The “best” tariff is the one with the lowest estimated annual cost and terms you can live with.
| Tariff type | Often suits | Watch-outs | “Cheapest” when… |
|---|---|---|---|
| Fixed | Budgeting-focused households; anyone wanting price certainty | Exit fees; may miss future price drops; DD and online billing requirements | The fixed unit rates/standing charge undercut local variable options for your postcode/usage |
| Variable (price-capped where applicable) | People who may move soon; those avoiding exit fees | Rates can rise; “intro” discounts may end; standing charge still varies by region | Competitive suppliers price close to the cap and fixed deals in your region are weaker |
| Economy 7 / two-rate | Storage heaters; EV owners charging overnight; flexible households | High day rate; the “right” tariff depends on your day/night split | A meaningful share of use is at night and your local two-rate standing charge isn’t punitive |
| Smart / time-of-use | People who can shift usage to cheaper windows (EV/heat pump/solar+battery) | Needs compatible meter; prices vary by time; can be more complex to predict | You can reliably move demand to cheaper periods and accept variability/complexity |
Quick checklist: choosing a “cheap” tariff safely
- Compare annual cost, not just unit rate.
- Check standing charge (especially for low usage).
- Confirm meter type matches the tariff (single-rate vs Economy 7 vs smart).
- Look for exit fees and contract length.
- Verify payment method assumptions (Direct Debit vs receipt vs prepay).
- Read eligibility notes: new customer, online-only, smart meter required.
Who this page is for (and who it isn’t)
It suits you if:
- You’re a UK tenant or homeowner
- You want a postcode-based estimate
- You’re open to switching supplier
It may not suit if:
- You need business energy
- You’re on a complex multi-meter set-up
- Your property is mid-change (meter exchange/convert)
If you rent: you can usually switch if you pay the bills, but check your tenancy agreement and ensure there are no landlord-managed supply arrangements.
Costs, exclusions and common pitfalls (postcode comparisons)
These are the most common reasons a “cheap” tariff headline price doesn’t match what you can actually get.
1) Standing charge shock
Low unit rates can be offset by a higher standing charge. This matters most for low usage homes and electricity-only flats.
2) Wrong meter type
Economy 7 and time-of-use need the right meter set-up. If your tariff doesn’t match your meter, billing can be wrong or switching may fail.
3) Payment method mismatch
Some deals assume Direct Debit. If you prefer paying on receipt, the same supplier may quote different rates.
4) Exit fees & timing
Fixed tariffs may charge exit fees if you leave early. If you’re near the end of your fix, you can often line up a switch without paying extra.
5) Regional availability & eligibility
Some tariffs are limited (new customers, online-only, smart meter required). Postcode checks help filter these out earlier.
6) Usage estimates
If you don’t know your kWh, comparisons can be skewed. A “cheap” tariff for an average user might not be cheapest for you.
Reminder: The Ofgem price cap limits the maximum a supplier can charge (where it applies), not what you’ll pay. Your bill depends on your usage and your tariff’s regional rates.
FAQs: cheapest energy tariffs by postcode (UK)
1) Why does my friend in another postcode get a cheaper rate?
Energy prices vary by region because network costs and regional charging differ. The same tariff name can have different standing charges and unit rates depending on where you live.
2) Do I need my usage (kWh) to find the cheapest tariff?
It helps a lot. If you don’t have it, comparisons may use typical values. That’s fine for a starting point, but your personal “cheapest” can change if your usage is higher or lower than typical.
3) Is a fixed tariff always cheaper than a variable tariff?
No. Fixed deals can be cheaper, especially when suppliers price aggressively, but variable tariffs can be better value when fixed pricing is uncompetitive. Always compare estimated annual cost and check exit fees.
4) I’m on Economy 7 — can I switch to a single-rate tariff?
Often yes, but it depends on your meter and supplier. If you switch to single-rate while still using lots of electricity overnight, you may lose out. It’s worth comparing using your actual day/night split if you have it.
5) How quickly can I switch energy supplier in the UK?
Switching times vary by supplier and circumstances, but many straightforward switches complete within days. Complex meter set-ups, debt arrangements or meter exchanges can take longer.
6) Can I switch if I’m renting?
Usually yes if you’re responsible for paying the energy bills. If bills are included in rent or the landlord manages the supply, you may not be able to change the supplier.
7) What about prepayment meters — can they access the cheapest tariffs?
Prepayment prices can differ and some tariffs are Direct Debit-only. You can still compare options available for prepay, but the range may be smaller. If you’re eligible to move to credit, it can open up more tariffs.
8) Are green tariffs always more expensive?
Not always. Some renewable-backed tariffs can be competitively priced. Focus on total cost and check what the supplier says the tariff includes (for example, certificates or renewable matching).
If you’re unsure what meter you have, check a recent bill, your in-home display (smart meter), or contact your current supplier before switching.
Trust, methodology and sources
Editorial trust signals
- Written by: EnergyPlus Editorial Team
- Reviewed by: Energy Specialist
- Last updated: March 2026
How we assess “cheapest by postcode” (transparent methodology)
This guide explains how postcode-based comparisons work and what influences outcomes. When we refer to “cheapest”, we mean lowest estimated annual cost for a given set of assumptions.
- Region: determined by postcode (electricity distribution region; gas region where applicable).
- Fuel: electricity, gas, or dual fuel.
- Payment method: Monthly Direct Debit vs pay-on-receipt vs prepayment.
- Meter type: single-rate, Economy 7/two-rate, or smart/time-of-use (where supported).
- Usage: your kWh if provided; otherwise a typical-usage estimate may be used for indicative comparisons.
- Costs included: unit rates + standing charges; any discounts/credits only where clearly stated in tariff terms.
- Costs not guaranteed: future price changes on variable tariffs; personal usage changes; supplier policy changes.
Limitations (what to keep in mind)
- Tariffs can appear/disappear quickly; availability can change daily.
- Some households have complex meter arrangements (e.g., multiple MPANs, legacy RTS/E7 set-ups) that require extra checks.
- Prices shown in comparisons are estimates; your billed cost depends on actual meter reads/usage and supplier billing cycles.
- “Cheapest” doesn’t account for customer service preferences, app features, or account management needs—those may matter to you.
Ready to check the cheapest tariffs for your postcode?
Get a clear, like-for-like comparison based on your region, meter type and payment method. Estimates update as suppliers change prices.
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