Cheapest electricity tariff in the UK with a smart meter
Find the lowest estimated smart-meter electricity prices for your postcode, usage and payment method — and check whether “smart” tariffs will actually suit the way you use energy.
- Whole-of-market comparison (where available) — prices vary by region and meter setup
- See estimated monthly cost based on your usage, not just unit rates
- Clear checks for smart meter compatibility, exit fees and peak-time pricing
Prices shown on this page are examples and will differ by region, payment method, smart meter type and supplier availability. Always check your personalised quote.
Fast answer: what’s the cheapest smart meter electricity tariff?
There isn’t one single “cheapest” smart meter electricity tariff for the whole UK. The cheapest option depends on your postcode (region), how much electricity you use, payment method, and whether you can benefit from time-of-use pricing (cheaper off-peak, higher at peak).
Quick rule of thumb: If you can shift meaningful usage to off-peak (for example EV charging, storage heaters, tumble dryer, dishwasher), a smart time-of-use tariff may be cheaper overall. If most of your electricity is used at peak times (late afternoon to evening), a standard single-rate tariff can be better value.
Key takeaways (UK-specific)
- Region matters: electricity prices differ across the 14 GB distribution regions (and Northern Ireland is a separate market).
- Payment method matters: direct debit is often cheaper than pay-as-you-go/prepayment; smart prepayment options exist but may have different rates.
- Smart meter type matters: SMETS2 is widely compatible; SMETS1 may have limited smart functionality depending on supplier and enrolment status.
- “Cheapest unit rate” isn’t always cheapest overall: standing charges can outweigh low unit rates for low users.
- Time-of-use can cut or increase bills: it rewards off-peak usage but can be expensive at peak. Always compare using your likely usage pattern.
Compare smart meter electricity tariffs (whole of market)
Use the quote form to see estimated monthly cost for smart-compatible tariffs for your home. We’ll show options based on your postcode, meter type and payment preference — and flag key features like fixed vs variable, exit fees and time-of-use windows.
Tip: If you don’t know your annual usage (kWh), check a recent bill or your in-home display/app. If you’re unsure, you can still compare — but the “cheapest” result may change once your real usage is used.
What we’ll ask (and why)
- Postcode
- Determines your electricity region and which tariffs are available.
- Contact details
- So we can send your quote and help if you want to switch. You’re in control.
- Optional: phone
- Useful if you’d like a quick call-back to confirm smart meter compatibility and tariff terms.
Get your smart tariff quote
Not sure if you have a smart meter? If you have an in-home display (IHD) showing near-real-time usage, you likely do — but not always. Some homes have smart meters with the display missing or disconnected.
How to find the cheapest electricity tariff with a smart meter
To get the lowest estimated cost (not just the lowest headline rate), compare on the details below. Smart meters unlock extra tariff types, but they also introduce new pricing structures that can catch people out.
1) Start with your usage (kWh)
Use your annual kWh from bills, or your supplier app. If you guess, your “cheapest” tariff can change later.
2) Check standing charge vs unit rate
Low users can be hit by high daily standing charges, even with a cheap unit rate.
3) Time-of-use: only if you can shift demand
If most of your usage is at peak times, you may pay more than on a simple single-rate tariff.
Smart meter compatibility checks
- SMETS2: generally works across suppliers.
- SMETS1: may work in smart mode, but not always; functionality can vary after switching.
- Signal/connectivity: some areas have weaker comms; you may still be billed accurately but without frequent smart reads.
Contract terms to read before switching
- Exit fees: common on fixed deals.
- Price changes: variable tariffs can change; fixed tariffs can end and move to a different rate.
- Time bands: for time-of-use, check exact hours, weekends and seasonal changes.
Important: Smart meters don’t automatically make electricity cheaper. They enable tariffs that can be cheaper for some households, but the best value still depends on your usage pattern and region.
Two realistic scenarios (with numbers)
These examples are simplified to show how “cheap” can change depending on when you use electricity. Rates are illustrative and not a live quote. Standing charges vary by region.
Scenario A: Flat user (no EV, mostly evening use)
- Annual usage: 2,700 kWh
- Usage timing: 75% peak, 25% off-peak
- Illustrative single-rate tariff: 25p/kWh, standing charge 55p/day
- Illustrative time-of-use tariff: peak 35p/kWh, off-peak 12p/kWh, standing charge 60p/day
In this pattern, time-of-use is likely worse because a lot of usage falls into the higher peak rate.
Scenario B: EV driver (regular overnight charging)
- Annual usage: 4,200 kWh
- Usage timing: 40% peak, 60% off-peak
- Same illustrative rates as above
With lots of off-peak use (like EV charging), time-of-use can win even if peak rates are higher.
Smart meter tariff comparison: what to look at (not just price)
A tariff can look “cheap” because of a low off-peak rate or a short-term discount. This table helps you compare what matters for real-world cost and switching risk.
| Tariff type | Best for | Watch-outs | Key checks |
|---|---|---|---|
| Single-rate (fixed or variable) | Most households; predictable usage; people who can’t shift demand | Higher all-day unit rate than off-peak deals; standing charge can be high | Standing charge, exit fees, what happens at end of fix |
| Time-of-use | EV charging; storage heating; households that run appliances overnight | Peak rates can be much higher; time windows may change; can penalise evening-heavy use | Exact time bands, peak price, weekends/seasonality, smart meter requirement |
| Tracker / market-linked | Comfortable with price changes; people who watch rates | Can rise quickly; budgeting is harder | How often price updates, any caps, notice period, exit terms |
| Smart prepayment | People who prefer PAYG top-ups; households managing debt/credit control | Rates/availability vary; emergency credit rules differ; standing charge still applies | Top-up method, emergency credit, debt recovery settings, eligibility to switch |
Decision checklist: likely to suit you
- You can shift at least 25–40% of usage to off-peak (EV charging, timers, storage heat).
- You’re happy to plan around time bands (and understand peak prices).
- You have a working smart meter (ideally SMETS2) with reliable readings.
- You’re comparing based on estimated annual cost, not just one rate.
Decision checklist: may not suit you
- Most usage is 4pm–10pm and you can’t move it.
- You need a simple bill and predictable pricing.
- Your property has connectivity issues and you rely on smart features (like half-hourly reads) for the tariff.
- You’re on (or need) a tariff type that requires specific metering (for example legacy restricted-hour setups) and your supplier has limited support.
Good to know: Not all suppliers offer every smart tariff in every region, and some “smart” deals are only available to existing customers. Availability will show in your personalised results.
Costs, exclusions and common smart tariff pitfalls
These are the reasons people think they’ve found the “cheapest” smart meter electricity tariff — then end up paying more. Use this section as a final check before you switch.
1) Standing charge changes the maths
If you’re a low user (small flat, out most days), a higher standing charge can wipe out savings from a lower unit rate.
2) Peak rates can be much higher
Time-of-use tariffs can be excellent — but only if you avoid peak. Check the peak unit rate and the exact hours (and whether weekends differ).
3) Smart meter communication isn’t guaranteed
Some households have patchy signal to the national network. If your tariff relies on half-hourly reads, confirm what happens if smart reads fail.
Exit fees and switching timing
- Fixed tariffs may include exit fees — check before switching early.
- Some deals have introductory periods. Look at what rate applies afterwards.
- Make sure you’re comparing like-for-like (electricity-only vs dual fuel).
Eligibility and meter quirks
- Some tariffs require half-hourly settlement or specific smart settings.
- Legacy multi-rate setups can limit options; confirm compatibility before switching.
- Smart prepay customers may face fewer choices, depending on supplier policies.
“Cheapest” vs “best value”
- A slightly higher price may be worth it for better customer service or fewer surprises.
- Consider budgeting: variable/tracker pricing can move up and down.
- Check billing options, app controls, and whether you can see usage by half hour.
If you’re vulnerable or struggling to pay: you may have extra protections and support available. See Citizens Advice guidance on help with energy supply and bills.
FAQs: cheapest smart meter electricity tariffs (UK)
Do smart meters make electricity cheaper?
Not automatically. Smart meters can enable tariffs (like time-of-use) that may be cheaper if you use more electricity at off-peak times. If you mainly use electricity at peak times, a smart tariff can cost more.
Can I get a time-of-use tariff without a smart meter?
Usually no. Time-of-use pricing typically requires a smart meter to record usage in time blocks (often half-hourly). Some legacy multi-rate tariffs exist, but availability is limited and rules vary by supplier.
Will my smart meter still work if I switch supplier?
In most cases, yes — especially for SMETS2 meters. Some SMETS1 meters may lose smart functions with certain suppliers, though many have been migrated to work across the network. If smart features matter for your tariff, confirm before switching.
What does “cheapest” actually mean in energy comparisons?
It should mean the lowest estimated total cost for your usage over a set period (often 12 months), including standing charges and any discounts — not just the lowest unit rate.
Are smart tariffs available on prepayment meters?
Some suppliers offer smart prepayment tariffs, but choice can be more limited and prices vary. If you’re repaying debt via the meter, switching can be restricted. Always check eligibility and what happens to any debt arrangement.
Do I have to share half-hourly data to get a smart tariff?
Some smart tariffs require more frequent readings (such as half-hourly data) to bill you correctly for time bands. You should be told what data is needed as part of the tariff terms. If you prefer not to share it, a standard single-rate tariff may be a simpler fit.
Can I switch if my smart meter isn’t sending readings?
Usually yes, but the supplier may estimate bills until the issue is fixed. If you’re choosing a tariff that relies on smart readings (especially time-of-use), check the supplier’s policy if readings fail.
Is the Ofgem price cap the same as the cheapest tariff?
No. The Ofgem price cap limits the maximum charges on certain standard variable tariffs (and some default tariffs). Fixed and smart time-of-use tariffs can be below or above the cap depending on structure and usage timing.
Have a specific setup (EV, solar, batteries, storage heaters)? The “cheapest” tariff is often setup-dependent — use the quote form above to see options tailored to your home.
Trust, methodology and sources
Editorial details
- Written by: EnergyPlus Editorial Team
- Reviewed by: Energy Specialist
- Last updated: May 2026
How we assess “cheapest” (our approach)
We treat “cheapest electricity tariff with a smart meter” as the tariff that produces the lowest estimated total cost for a specific household profile, based on:
- Postcode/region: because standing charges and unit rates vary across GB regions.
- Payment method: direct debit vs prepayment can affect availability and pricing.
- Tariff structure: single-rate vs time-of-use vs tracker/market-linked.
- Usage assumptions: the user’s stated (or estimated) annual kWh and, for time-of-use, an assumed split of peak/off-peak usage.
- Fees and terms: exit fees, end-of-fix changes, and any eligibility criteria stated in tariff terms.
Limitations: We can’t guarantee a tariff will remain the cheapest because suppliers can change prices, withdraw products, or apply eligibility rules. Your smart meter’s connectivity and your actual peak/off-peak usage can materially change outcomes.
Primary UK sources we reference
- Ofgem: check if the energy price cap affects you
- Ofgem: getting a smart meter
- Citizens Advice: energy supply advice
- GOV.UK: switch energy supplier
EnergyPlus is an independent comparison service. Tariff availability and pricing can change; always confirm full terms with the supplier before you switch.
Ready to check the cheapest smart meter electricity tariffs for your home?
Get a personalised quote by postcode and usage. We’ll show estimated costs and flag key terms like time bands and exit fees.
Back to Solar Energy