Energy tariffs with cheap night rates for smart meters
A practical UK guide to off-peak (night) electricity tariffs for smart meters—who they suit, what to check, and how to compare whole-of-market deals safely.
- Understand off-peak windows, unit rates and standing charges (and why the cheapest night rate doesn’t always win)
- See realistic scenarios with numbers, plus a comparison table you can use to shortlist tariffs
- Check eligibility: smart meter setup, region, payment method, and any exit fees or usage rules
Estimates shown for guidance only. Tariff availability and rates vary by region, meter setup and payment method.
Fast answer: what are “cheap night rate” smart meter tariffs?
They’re electricity tariffs that charge a lower unit rate during set off-peak hours (often overnight) and a higher unit rate the rest of the day. With a smart meter, your supplier can bill different rates by time-of-use without a traditional Economy 7/Economy 10 meter setup—though some tariffs still rely on those legacy patterns.
Key takeaways
- Night rate is only half the story: a high day rate or standing charge can wipe out any benefit.
- Off-peak windows vary: some are fixed; others can differ by region, meter configuration, or supplier.
- Best fit: households that can shift a meaningful share of use to off-peak (common with EV charging, some heat pumps, storage heaters, dishwashers/washers on timers).
- Not always best fit: low night usage, very efficient homes with little flexible load, or where daytime electricity dominates.
Quick “is it worth it?” check
- If you can move this much usage off-peak…
- Roughly 25–40% of your electricity (or more) into the cheaper window, you’re more likely to benefit.
- If your off-peak usage is small…
- A single-rate tariff can be cheaper overall, even if its unit rate looks higher than the night rate.
Compare smart meter off-peak tariffs (whole of market)
Use the form to compare eligible tariffs for your home, including options with cheap night rates where available. We’ll use your postcode to show prices for your electricity region and your payment method.
How off-peak tariff comparisons work
- We ask for your postcode to identify your electricity distribution region (prices can differ by region).
- We check your preference (electricity only, or dual fuel if you want to bundle gas too).
- We show eligible tariffs—including single-rate and off-peak options—so you can choose based on your likely usage pattern.
If you don’t know your split between day and night use yet, you can still compare—then validate the best option by checking your smart meter or app for typical off-peak usage.
Get your quote
Compare tariff types: which “cheap night rate” option fits your home?
Not all off-peak tariffs behave the same way. Use this table to narrow down the tariff type before you focus on the actual prices available in your region.
| Tariff type | How the cheaper rate works | Best for | Watch-outs |
|---|---|---|---|
| Economy 7 (E7) | Typically ~7 hours overnight at a lower unit rate, higher day rate. | Homes with storage heaters / hot water storage, or people who can run appliances overnight. | Off-peak hours can differ by region and meter settings; day rate may be significantly higher. |
| Economy 10 (E10) | Typically ~10 off-peak hours split across day/evening/night. | Some electric-heated properties needing flexibility beyond overnight. | Less widely available; times can be complex; supplier support varies. |
| Smart time-of-use (TOU) | Rates vary by time bands (may include cheap overnight, or multiple cheaper periods). | EV owners, flexible users, smart home automation, households willing to shift load. | Often needs half-hourly readings; peak rates can be high; timing matters. |
| Single-rate (baseline) | Same unit rate all day and night. | Most homes without high off-peak usage; people who want predictability. | No dedicated cheap window—may cost more if you have heavy overnight demand. |
Suits you if…
- You can regularly shift high-load tasks off-peak (EV, immersion heater, laundry).
- You understand (or can learn) your usage pattern from smart meter data.
- You’re happy to plan around the off-peak window(s).
May not suit you if…
- Most electricity is used daytime (home working, cooking, electric heating without storage).
- You can’t control when devices run (no timers, no EV scheduling).
- You prefer straightforward bills and don’t want multiple rates.
Decision checklist
- Off-peak share: can you reach ~25–40% overnight/cheap periods?
- Rate times: do the cheap hours match your routine?
- Standing charge: is it higher than alternatives?
- Exit fees: any costs if you need to leave early?
- Payment method: Direct Debit vs prepayment affects availability/pricing.
- Meter compatibility: can your smart meter support the tariff?
Costs, exclusions and common pitfalls (UK-specific)
“Cheap night rate” tariffs can be great—but only when the details match how your home uses electricity. Here’s what commonly catches people out.
1) The day rate can be much higher
If most of your usage is in the day, a higher peak/day unit rate may outweigh overnight savings. Always look at both unit rates plus standing charge.
2) Off-peak hours aren’t always “midnight to 7am”
Economy 7 times can vary by region and meter configuration. Time-of-use tariffs may use different bands (including late evening or early morning).
Before switching, confirm the exact time bands in your tariff terms and how they appear on your bills.
3) Standing charges matter (a lot)
A tariff with a very low night rate can still be expensive overall if the standing charge is higher, especially for low-usage households (for example, small flats).
4) Smart meter compatibility & data settings
Some tariffs require half-hourly readings. You may need to consent to this through your supplier. If your smart meter isn’t communicating reliably, the tariff may not work as expected.
5) Exit fees and fixed-term rules
Fixed tariffs can include exit fees if you leave early. Check the contract length and whether the tariff has any usage conditions.
6) Prepayment and landlord/tenancy constraints
If you’re on prepayment, your choice of off-peak tariffs may be more limited. Tenants can usually switch supplier, but check your tenancy agreement and ensure you’re responsible for the bills.
Two realistic scenarios (with estimated numbers)
These examples are simplified to show the trade-off between day rate, night rate and standing charge. They are not quotes and don’t include all tariff features.
Scenario A: EV charging shifts lots of usage to night
- Annual electricity: 4,200 kWh
- Off-peak share: 45% (1,890 kWh) due to scheduled EV charging
- Single-rate example: 26p/kWh, standing charge 55p/day
- Off-peak example: Day 30p/kWh, Night 12p/kWh, standing charge 60p/day
Estimated annual cost (energy + standing charge):
Single-rate: (4,200×£0.26) + (365×£0.55) ˜ £1,293
Off-peak: (2,310×£0.30) + (1,890×£0.12) + (365×£0.60) ˜ £1,140
Why it works: a large chunk of usage lands in the cheap window, so the higher day rate is less damaging.
Scenario B: Low overnight use in a small flat
- Annual electricity: 2,000 kWh
- Off-peak share: 15% (300 kWh)
- Single-rate example: 25p/kWh, standing charge 50p/day
- Off-peak example: Day 32p/kWh, Night 13p/kWh, standing charge 60p/day
Estimated annual cost (energy + standing charge):
Single-rate: (2,000×£0.25) + (365×£0.50) ˜ £683
Off-peak: (1,700×£0.32) + (300×£0.13) + (365×£0.60) ˜ £801
Why it doesn’t: most usage is billed at the higher day rate and the standing charge is higher too.
FAQs: smart meter tariffs with cheap night rates
Do I need a smart meter to get a cheap night rate?
Not always. Traditional Economy 7/Economy 10 arrangements can work without a smart meter. However, many newer time-of-use tariffs (with specific time bands) are designed for smart meters and may require half-hourly readings.
What are typical Economy 7 hours in the UK?
Economy 7 is usually around 7 hours overnight, but the exact window can vary by region and meter settings. Your bill, online account, or supplier can confirm the exact off-peak times for your meter.
Will a cheap night rate reduce my bills?
It can, but it depends on your day/night split, the standing charge, and how high the day/peak unit rate is. If you can’t shift much usage to off-peak, a single-rate tariff may be cheaper overall.
Can I get an off-peak tariff if I’m on prepayment?
Sometimes, but availability can be more limited and prices can differ. If you’re on a smart prepayment meter, ask your supplier what time-of-use or multi-rate options they support for your meter type.
Will switching affect my smart meter or in-home display?
Usually your smart meter stays in place. Some in-home displays can temporarily lose functionality after a switch, depending on the supplier and meter configuration, but readings should still be collected if the meter is communicating properly.
Do I need to give half-hourly readings to use time-of-use tariffs?
Often, yes. Time-of-use billing typically relies on half-hourly consumption data. Your supplier should explain what data is collected and how it’s used, and you can ask about your preferences and consent.
I rent—can I switch to a night-rate tariff?
If you’re the bill payer, you can usually switch supplier. You typically can’t be charged just for switching, but you should keep the landlord informed if there are any meter changes required. If your heating is wired for Economy 7, confirm it will still operate correctly after a switch.
What if I already have Economy 7—can I go back to single-rate?
Often yes, but it may require a tariff change and in some cases a meter configuration change. The best option depends on how your property’s heating and hot water are set up. Ask your supplier whether any work or costs apply before switching.
Trust, methodology and sources
Editorial details
- Written by
- EnergyPlus Editorial Team
- Reviewed by
- Energy Specialist
- Last updated
- April 2026
How we assess “cheap night rate” smart meter tariffs
We focus on what changes real bills in the UK: unit rates by time band, standing charges, eligibility, and usage fit. For examples and comparisons on this page:
- We use simplified annual kWh and assumed day/off-peak splits to show how outcomes can change.
- We include standing charge in scenarios because it materially affects totals.
- We don’t assume guaranteed savings; actual pricing varies by region, supplier, payment method and market changes.
- We highlight constraints such as half-hourly data requirements, meter communications, and fixed-term exit fees.
Sources (UK)
- Ofgem (energy regulator) — guidance on switching, billing, and consumer rights.
- Citizens Advice: energy — independent help on tariffs, switching and complaints.
- GOV.UK: Smart meters — overview of smart meters and how they work.
We also use supplier tariff terms and regional price data when generating quotes through EnergyPlus comparisons.
Ready to check cheap night rates for your smart meter?
Compare whole-of-market tariffs by postcode and see which off-peak options are actually available in your area—then choose based on your usage pattern.
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