Cheap off-peak electricity tariffs for smart meters (UK)
A practical guide to finding an off-peak tariff that fits your smart meter, your usage and your lifestyle — with realistic examples, pitfalls to avoid, and a quick quote form.
- Understand the main types: EV tariffs, heat pump tariffs, and time-of-use (TOU) plans
- Check eligibility: smart meter type, payment method, region and minimum off-peak use
- Compare using your actual day vs night usage (not just the cheapest off-peak rate)
Off-peak prices, hours and eligibility vary by supplier, meter and region. Any examples on this page are estimates for guidance, not guarantees.
Fast answer: what are the cheapest off-peak tariffs for smart meters in the UK?
The cheapest off-peak electricity rate is usually found on smart-meter time-of-use tariffs (often aimed at EV charging or flexible demand). But “cheap off-peak” only works out cheaper overall if you can reliably shift enough usage into the off-peak window(s) without paying too much extra at the peak/day rate or standing charge.
Key takeaways (UK)
- Best fit if you can move usage (EV charging, immersion heater, laundry, dishwasher) to specific hours.
- Not always cheapest if you’re home all day or can’t shift demand — higher peak rates can wipe out off-peak gains.
- Smart meter needed for most TOU tariffs. Some older multi-rate meters (e.g. Economy 7) can work without a smart meter, but offers are different.
- Off-peak hours vary by tariff and region. Don’t assume it’s always midnight–7am.
Quick “is it worth it?” rule of thumb
Compare tariffs using your estimated annual kWh split between off-peak and peak.
- Most likely to benefit
- If you can shift roughly 25–40%+ of electricity into off-peak hours (often higher for EV/heat pump households).
- Most likely to lose out
- If your off-peak share stays low (under ~15–20%) and the daytime rate is much higher than a standard single-rate tariff.
These percentages are indicative only. The exact break-even point depends on the difference between peak/off-peak rates, standing charge, and your usage pattern.
Compare off-peak tariffs across the market
Tell us a few details and we’ll match you with off-peak options that fit your meter setup and usage profile (including smart-meter TOU where available).
- Whole-of-market comparison approach (availability depends on supplier participation and eligibility)
- See tariffs by total estimated annual cost, not just the headline off-peak rate
- We’ll flag key terms like off-peak windows, exit fees and standing charges
Tip: If you have an EV, immersion heater or heat pump, mention it when you speak to a specialist — it can change which off-peak tariffs suit you.
What counts as “off-peak” with a smart meter?
With a smart meter, suppliers can offer time-based pricing (for example cheaper overnight, or extra-cheap in a short window). Your meter records half-hourly readings and your tariff applies rates depending on the time of use.
Get your off-peak quote
Start with the essentials. You can add more detail later.
How to choose a cheap off-peak tariff (without getting caught out)
1) Know your off-peak “shiftable” usage
List what you can move to off-peak: EV charging, tumble dryer, dishwasher, washing machine, immersion heater, storage heaters, dehumidifier. Estimate how many kWh that represents each week.
2) Check the tariff’s time windows
Some tariffs have a single overnight window; others have multiple cheap windows. Make sure the cheap hours match when you can actually run appliances safely and conveniently.
3) Compare total cost, not just the off-peak unit rate
A very low off-peak rate can come with a high peak/day rate or higher standing charge. Use your day/night split to calculate the estimated annual cost.
4) Confirm eligibility and “small print”
Check smart meter requirement (and whether SMETS2 is needed), payment method, minimum term, exit fees, and whether the tariff is restricted to EV owners or specific tech.
Practical check: If you’re on a smart TOU tariff, take a photo of your latest bill or open your supplier app. Look for wording like “half-hourly readings”, “time-of-use”, or separate lines for peak/off-peak consumption.
Off-peak tariff types (smart meter UK): what’s the difference?
Below is a plain-English comparison of the most common off-peak options you’ll see in the UK. Exact names and hours vary by supplier.
| Tariff type | How off-peak works | Who it suits | Common catches |
|---|---|---|---|
| Economy 7 / Economy 10 | Typically 7 (or 10) cheaper hours per day; timings can vary by region/meter. | Homes with storage heaters, immersion heaters, or consistent overnight use. | Day rate may be higher; timings may not match your routine; some meters are complex to replace. |
| Smart EV tariffs | Very cheap window(s) intended for charging; sometimes additional smart charging features. | EV owners who can charge overnight and shift other loads too. | May require compatible car/charger/app; peak rate can be higher; some have eligibility checks. |
| Heat pump / “low-carbon” tariffs | Off-peak or discounted periods to encourage heating/hot water at certain times. | Heat pump households that can pre-heat or run hot water cycles in cheaper periods. | Comfort constraints; may not suit always-at-home usage; check meter and control compatibility. |
| Multi-rate TOU (general) | Several different rates across the day (e.g. peak, shoulder, off-peak). Often half-hourly based. | Flexible households happy to schedule appliances and track usage. | More complex bills; some hours may be very expensive; not ideal if you can’t shift demand. |
Decision checklist: does an off-peak tariff suit you?
- Yes if you can automate loads (timers, smart plugs, EV schedules) and you’re happy to avoid peak hours.
- Yes if you have an EV/heat pump/storage heating and can move big chunks of kWh to cheap periods.
- Maybe not if you need high daytime electricity (home working, electric cooking, electric heating without storage).
- Maybe not if you prefer a simple bill and don’t want to manage timings.
What to gather before you switch
- Your annual kWh (or last 12 months) and, if available, day vs night usage
- Meter details: smart meter present, and whether you have single-rate or multi-rate billing
- Payment method (Direct Debit vs pay-as-you-go)
- Any tech: EV, charger model, solar PV/battery, heat pump, immersion heater, storage heaters
If you’re not sure about your usage split, we can still compare — but estimates will be less accurate than using your real day/night kWh.
Two realistic examples (with numbers)
These scenarios show why the overall bill matters more than the cheapest off-peak unit rate. Figures are illustrative and rounded.
Scenario A: EV driver with high overnight charging
Assumptions: 4,500 kWh/year total. 45% off-peak (2,025 kWh) due to EV charging overnight. 55% peak (2,475 kWh). Standing charge ignored for simplicity (it can change outcomes).
| Tariff (example) | Peak rate | Off-peak rate | Estimated annual unit cost |
|---|---|---|---|
| Standard single-rate | 25p/kWh | — | 4,500 × £0.25 = £1,125 |
| Smart off-peak tariff | 32p/kWh | 10p/kWh | (2,475 × £0.32) + (2,025 × £0.10) = £994 |
In this example, the off-peak tariff looks cheaper overall because a large share of usage lands in cheap hours.
Scenario B: Home worker with low off-peak usage
Assumptions: 3,100 kWh/year total. 12% off-peak (372 kWh) from occasional overnight appliances. 88% peak (2,728 kWh). Standing charge ignored for simplicity.
| Tariff (example) | Peak rate | Off-peak rate | Estimated annual unit cost |
|---|---|---|---|
| Standard single-rate | 25p/kWh | — | 3,100 × £0.25 = £775 |
| Smart off-peak tariff | 32p/kWh | 10p/kWh | (2,728 × £0.32) + (372 × £0.10) = £910 |
Here, the off-peak tariff costs more overall because most usage stays in peak hours with a higher unit rate.
Important: Standing charges, regional pricing, and tariff structures can change the outcome. Always compare the supplier’s estimated annual cost (or compute it from your kWh split) before switching.
Costs, exclusions and common pitfalls (UK-specific)
Off-peak tariffs can be excellent — but they’re also where small-print details matter most. Here are the key things to check before you commit.
1) Off-peak hours aren’t universal
Economy 7 timings can vary by region and meter configuration. Smart TOU tariffs can have different windows (and some have multiple rates).
2) Peak rates can be significantly higher
Some EV/TOU tariffs trade an ultra-low off-peak rate for a higher day rate. If you can’t shift enough usage, total cost can rise.
3) Standing charges still matter
Even with cheap off-peak units, a higher standing charge can reduce or erase savings — especially for low-usage households.
4) Smart meter & data settings
Many TOU tariffs require half-hourly reads. If your smart meter is installed but not sending readings reliably, you may not be able to join or stay on certain tariffs.
5) EV/charger compatibility requirements
Some EV tariffs require a compatible charger or app-based smart charging. If you prefer “set-and-forget”, check how scheduling works.
6) Exit fees and fixed terms
Fixed deals may include exit fees. That can matter if you plan to move home, install new tech, or expect to switch again soon.
Pay-as-you-go note: Many off-peak smart tariffs are primarily offered for Direct Debit customers. If you’re on prepayment, availability can be more limited — but it’s still worth checking.
Avoid these common mistakes
- Choosing a tariff based on the lowest off-peak unit rate only (instead of total annual cost).
- Assuming off-peak is always 00:00–07:00 (timings vary).
- Forgetting to include standing charge in your comparison.
- Not checking whether you’ll be billed as single-rate or multi-rate after switching.
- Using appliance timers without considering safety (e.g. tumble dryers unattended).
FAQs: cheap off-peak electricity tariffs (smart meters, UK)
Do I need a smart meter for off-peak electricity?
For many modern time-of-use tariffs, yes — suppliers typically need smart, half-hourly readings. Traditional Economy 7/10 can work without a smart meter, depending on your meter type, but options can be more limited.
What are typical off-peak hours in the UK?
It depends. Economy 7 is commonly overnight for 7 hours, but the exact times vary by region and meter setup. Smart TOU tariffs may offer cheaper windows at different times (and sometimes more than one window).
Can I get an off-peak tariff if I don’t have an EV?
Often, yes — there are off-peak and multi-rate TOU tariffs not restricted to EV owners. However, some EV-branded tariffs may require you to confirm EV ownership or use compatible smart charging.
Will an off-peak tariff affect my direct debit?
Potentially. Suppliers set Direct Debit amounts using estimated annual usage and your tariff rates. If you move to a tariff with higher peak rates, your monthly amount might increase unless you shift usage into off-peak hours as planned.
Can solar panels or a home battery make off-peak tariffs better?
Sometimes. A battery can charge during cheap off-peak hours and cover usage during peak times. But the best setup depends on export rates, battery size, and your usage pattern. Always compare total costs and check how export is paid.
What if my smart meter isn’t sending readings?
You may struggle to join or remain on certain TOU tariffs if half-hourly data isn’t available. Your supplier can troubleshoot connectivity. If you’re switching, mention this so eligibility checks can be handled upfront.
Are off-peak tariffs available on prepayment meters?
Availability can be limited compared with Direct Debit, and it varies by supplier and meter type. If you’re on pay-as-you-go, it’s still worth checking what’s available in your region and whether you can change payment method.
Do off-peak tariffs have exit fees?
Some fixed off-peak tariffs do. Variable tariffs typically don’t, but terms vary. Always check the tariff information label or key terms for exit fees and contract length.
Need a quick sense-check? Use the quote form above and ask for a comparison based on your estimated off-peak share — even a rough split can highlight which tariff types are risky for your usage.
Trust, methodology and sources
Editorial details
- Written by
- EnergyPlus Editorial Team
- Reviewed by
- Energy Specialist
- Last updated
- March 2026
How we assess “cheap off-peak” tariffs
We focus on what matters to households: total estimated annual cost, tariff structure and suitability — not just the lowest off-peak unit rate.
- Tariff structure: peak vs off-peak unit rates, number of time bands, and any restricted hours.
- Standing charge impact: especially for smaller homes/low usage.
- Eligibility constraints: smart meter requirement, half-hourly reads, Direct Debit vs prepayment, region, and technology requirements (e.g. EV/charger compatibility).
- Practicality: whether a typical household can realistically shift enough kWh to the cheap window.
Limitations: Prices and availability can change quickly and vary by region. TOU tariffs may be updated by suppliers, and eligibility can depend on your exact meter setup and data connectivity.
Sources (UK)
- Ofgem (Great Britain energy regulator) — guidance on energy prices, consumer protections and smart meters.
- Citizens Advice: Energy — independent advice on billing, switching and complaints.
- GOV.UK: Switch energy supplier — overview of switching process and consumer rights.
- Smart Energy GB — smart meter explanations and what they enable.
Ready to check cheap off-peak options for your smart meter?
We’ll compare tariffs based on your area and help you avoid costly mismatches (like a great night rate with an expensive day rate).
We’ll always show estimated costs and key terms. Supplier availability, rates and eligibility criteria vary and can change.
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