Switch to an off-peak electricity tariff: UK savings guide
Off-peak tariffs can cut costs if you can shift electricity use to cheaper hours. This guide explains how they work in the UK, who they suit, and how to compare options safely.
- See if an off-peak tariff fits your meter, heating and lifestyle
- Use realistic examples with estimated numbers (and the assumptions behind them)
- Compare Economy 7/10, smart time-of-use tariffs and EV-style plans
Savings are not guaranteed. Eligibility and rates depend on your meter type, region and supplier. Always check your peak unit rate, standing charge, and any exit fees before switching.
Fast answer: will an off-peak tariff save you money in the UK?
An off-peak tariff can be cheaper if you can consistently use a meaningful share of your electricity in the off-peak window (often overnight). If most of your use stays at peak times, you can end up paying more because peak unit rates on time-of-use tariffs are often higher than standard single-rate tariffs.
Typically suits
- Homes with Economy 7/10 electric heating or storage heaters
- EV owners who can schedule charging overnight
- Households able to run appliances (washer/dishwasher/tumble dryer) off-peak
Often not worth it
- Daytime-heavy usage (home all day, electric cooking, little overnight load)
- Unable to shift use due to noise, safety, or lease rules
- Very low electricity usage overall (potential savings are small)
Quick self-check (2 minutes)
- Do you know your meter type (single-rate, Economy 7/10, or smart)?
- Can you shift 25–40% of usage off-peak?
- Have you compared peak unit rate + standing charge vs your current tariff?
How off-peak electricity tariffs work (UK)
Off-peak (time-of-use) tariffs charge different prices depending on the time of day. In the UK, the main types you’ll see are Economy 7, Economy 10 and smart time-of-use tariffs (sometimes marketed for EV charging).
1) Economy 7 (E7)
Two unit rates: a cheaper night rate for around 7 hours, and a more expensive day rate. The exact off-peak hours vary by region and meter setup and may shift with British Summer Time.
2) Economy 10 (E10)
Typically gives around 10 off-peak hours spread across day/evening/night (varies widely). It can suit some electric heating setups, but it’s less widely available than Economy 7.
3) Smart time-of-use (TOU) / EV tariffs
These require a smart meter and may have multiple price bands or very cheap “super off-peak” windows. Some have dynamic rates that change daily. Always check: peak price, standing charge, and any conditions (e.g. EV required, app scheduling, minimum smart meter data sharing).
Check off-peak options for your postcode
Tell us a few details and we’ll show available off-peak tariffs you can compare. This is designed for UK households (not business energy).
Two realistic UK scenarios (with estimated numbers)
Scenario A: Economy 7 helps (high overnight use)
Household: 2-bed flat with storage heaters + immersion, can shift usage overnight.
Annual electricity use: 4,200 kWh.
Off-peak share: 45% (1,890 kWh night / 2,310 kWh day).
Estimated annual cost (energy only):
Standard: 4,200 × £0.28 = £1,176
E7: (2,310 × £0.33) + (1,890 × £0.16) = £1,064
Estimated difference: ~£112/year cheaper (before any standing charge differences and excluding discounts/fees).
Scenario B: Off-peak costs more (low overnight use)
Household: 3-bed home, gas heating, mostly evening cooking and daytime home working.
Annual electricity use: 3,100 kWh.
Off-peak share: 15% (465 kWh night / 2,635 kWh day).
Estimated annual cost (energy only):
Standard: 3,100 × £0.28 = £868
E7: (2,635 × £0.33) + (465 × £0.16) = £944
Estimated difference: ~£76/year more expensive.
These examples are simplified to show the trade-off between day and night rates. Real bills also include standing charges, VAT, any discounts, and supplier-specific terms.
Compare off-peak tariff types (UK) + decision checklist
Use this table to narrow down what you’re comparing. Availability depends on your region, meter configuration, and the supplier’s criteria.
| Tariff type | Meter needed | Best for | Watch-outs |
|---|---|---|---|
| Economy 7 | E7 capable (often 2-rate) | Storage heaters, immersion, regular overnight loads | Peak rate can be high; off-peak times vary; check BST changes |
| Economy 10 | E10 capable / specific setup | Some electric heating patterns needing daytime boost | Limited availability; times can be complex and region-dependent |
| Smart TOU (fixed bands) | Smart meter | EV charging, battery storage, flexible households | Multiple rates to track; higher peak rates; app/data sharing may be required |
| Smart TOU (dynamic) | Smart meter | Very flexible use, automation, home battery | Prices can change frequently; budget uncertainty; not ideal if you need predictability |
Decision checklist: likely a good fit if…
- You can shift at least a quarter of your usage off-peak (more is better).
- You have (or can get) the right meter without hassle.
- The day rate + standing charge still look reasonable versus your current tariff.
- You can schedule high-load items: EV charging, immersion, laundry, dishwasher.
Proceed with caution if…
- You’re home all day and most usage is peak-time.
- Your heating/hot water setup is unclear (especially older storage heating controls).
- You’re on a tight budget and need bill predictability (dynamic tariffs can vary).
- You rent and can’t change timers/controls, or you have building rules about overnight appliances.
Costs, exclusions and common pitfalls (UK)
1) Off-peak hours aren’t universal
Economy 7/10 switching times can differ by region and meter. Some meters change with British Summer Time, meaning your “cheap hours” may shift seasonally.
2) Higher day rates can wipe out savings
If your cooking, showers (electric), and home working happen in peak hours, the higher day unit rate may outweigh cheaper nights.
3) Standing charges and fees still matter
Always compare standing charge, unit rates and any exit fees. A good night rate doesn’t automatically mean a lower overall bill.
4) Meter compatibility can limit choices
Some suppliers have fewer deals for legacy multi-rate meters. If you need a meter exchange, ask about any appointment timescales and whether your current setup (e.g. storage heater circuits) will be supported.
5) Smart TOU may have conditions
Some EV/time-of-use tariffs require a smart meter, half-hourly readings, or specific charging behaviour. Read the eligibility criteria and what happens if you can’t meet it.
6) Prepayment can be different
Not all off-peak tariffs are available on prepayment meters, and pricing/availability can differ. If you’re on prepay, check options carefully before starting a switch.
FAQs
What times are off-peak on Economy 7?
There isn’t one universal schedule. Many Economy 7 meters provide around 7 hours overnight, but the exact times depend on your region and meter settings, and may shift with British Summer Time. Your bill, online account, or meter handbook may show the switching times—if not, ask your supplier.
How do I know if I have an Economy 7 meter?
Common clues: your bill shows two unit rates (day/night), or your meter cycles through two readings (often labelled “Rate 1/Rate 2” or similar). If you have a smart meter, your supplier can confirm your register setup.
Can I switch from Economy 7 to a normal single-rate tariff?
Often yes, but it depends on your meter configuration and supplier. Some switches can be done by reconfiguring a smart meter remotely; other setups may need a meter exchange. If you have storage heaters wired to an off-peak circuit, get advice before changing anything.
Do off-peak tariffs work with solar panels?
They can. Solar typically reduces daytime grid use, which might make a high day rate less painful. If you have a home battery, off-peak charging can be useful—but export payments and battery cycling should be considered. Check how your export tariff interacts with any time-of-use import tariff.
Will I pay an exit fee to switch?
Some fixed deals have exit fees; many variable tariffs don’t. Before switching, check your current tariff’s terms and your latest bill. If you’re unsure, we can help you compare likely costs when you request a quote.
Are off-peak tariffs available on prepayment meters?
Sometimes, but not always—and availability can be narrower. Smart prepayment may offer more options, but it varies by supplier and region. If you’re on prepay, compare like-for-like and confirm any eligibility criteria.
How much off-peak use do I need for it to be worth it?
There’s no single threshold because it depends on the gap between day and night rates and the standing charge. As a rule of thumb, households often need roughly 25–40% of usage in off-peak hours to see meaningful savings, but your best check is to run the numbers using your own consumption split.
Does a smart meter automatically mean I get off-peak rates?
No. A smart meter can make you eligible for certain time-of-use tariffs, but you still have to choose and agree to a tariff with time-based rates. Always read the tariff information, including how rates are applied and when they can change.
Trust, methodology and sources
Page details
- Written by:
- EnergyPlus Editorial Team
- Reviewed by:
- Energy Specialist
- Last updated:
- March 2026
How we assess “off-peak savings”
We focus on whether a tariff is likely to reduce annual cost for a household, not just whether it has a low off-peak unit rate. Our comparisons consider:
- Unit rates across peak/off-peak (or multiple bands)
- Standing charge (which can materially affect low-usage households)
- Meter eligibility and practical constraints (Economy 7/10 vs smart TOU)
- Usage shape (how much electricity is realistically shifted off-peak)
- Terms such as exit fees, price change rules (variable vs fixed), and conditions on EV/automation
Helpful UK sources
- Ofgem (UK energy regulator) — guidance on the energy market and consumer protections
- Citizens Advice: Energy — practical advice on bills, switching, and meter issues
- GOV.UK: Switch energy supplier — how switching works and what to expect
Ready to see if off-peak can work for your home?
Compare whole-of-market options in minutes. We’ll help you check eligibility, day/night rates, and the details that affect real-world savings.
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