What is an off-peak electricity tariff for smart meters?

An off-peak (time-of-use) tariff charges different unit rates at different times of day. With a smart meter, usage is recorded half-hourly (or more frequently), so your supplier can bill cheaper rates during off-peak hours (often overnight) and higher rates at peak times.

Do I need a smart meter to get off-peak electricity rates in the UK?

Many modern off-peak and time-of-use tariffs require a smart meter because billing is based on when you use electricity. Some legacy tariffs (e.g., certain Economy 7 setups) can work with older meters, but smart meters typically offer wider tariff choice and more accurate time-based billing.

What is Economy 7 and how does it compare to other off-peak tariffs?

Economy 7 is a traditional UK off-peak tariff that usually provides 7 hours of cheaper electricity overnight, with a higher rate during the day. Newer smart-meter tariffs may offer different off-peak windows, multiple time bands, or dynamic pricing—so the best option depends on when you use most of your electricity.

When are off-peak hours for smart meter tariffs?

Off-peak hours vary by supplier, region, meter setup, and tariff type. Some tariffs have a fixed overnight window, while others have multiple cheap periods or change by day. Always check the exact off-peak times in your tariff terms before switching and plan usage around those times.

How can I tell if an off-peak tariff will actually save me money?

Savings depend on how much electricity you can shift to off-peak times and the difference between peak and off-peak unit rates (plus the standing charge). A practical rule is: the more of your total usage you can move into the cheaper window (e.g., charging an EV, running a heat pump, hot water heating, washing/drying), the more likely you are to benefit.

What appliances are best to run on off-peak electricity?

High-consumption, flexible-load appliances typically benefit most: EV charging, immersion heaters/hot water, storage heaters, heat pumps (where appropriate), washing machines, dishwashers, tumble dryers, and batch cooking or pre-heating. Use timers or smart plugs where safe and suitable.

Are off-peak tariffs good for EV charging?

Often, yes—EV charging is one of the best use cases for off-peak tariffs because you can schedule charging overnight or in the cheapest time bands. Compare the off-peak unit rate, the length of the cheap window, and any higher peak rates to ensure overall savings for your household’s full usage.

Can households without an EV still benefit from off-peak electricity tariffs?

Yes, if you can shift enough usage to off-peak times—especially for hot water heating, laundry, dishwashing, and other scheduled appliances. If most of your usage is in the evening peak, a standard single-rate tariff may be better.

What should I check before switching to a cheap off-peak smart meter tariff?

Check: (1) exact off-peak hours/time bands, (2) peak vs off-peak unit rates and standing charge, (3) whether weekends differ, (4) exit fees or contract length, (5) your smart meter compatibility and meter configuration, and (6) how your usage patterns will change.

Will an off-peak tariff increase my daytime electricity costs?

It can. Off-peak tariffs often offset cheaper overnight rates with higher peak/day rates and sometimes a different standing charge. If you can’t shift a meaningful portion of consumption to off-peak, your total bill may rise.

How do I find the cheapest off-peak electricity tariff for my smart meter?

Compare tariffs using your actual consumption (kWh) and, ideally, half-hourly usage data from your smart meter. Focus on the full cost (standing charge + peak/off-peak rates) and pick a tariff that matches when you use electricity. You can review guidance and next steps on https://www.energyplus.co.uk/CostSavingAdvice/cheap-off-peak-electricity-tariffs-for-smart-meters-uk.

Can I switch back if an off-peak tariff isn’t right for me?

In most cases, yes, but check the tariff’s contract terms for notice periods and any exit fees. If you’re on a fixed deal, leaving early could cost more than the savings.

Cheap off-peak electricity tariffs for smart meters (UK)

Learn how off-peak smart meter tariffs work, what “cheap” really means, and how to compare unit rates, standing charges and peak windows—before you switch.

Includes EV, heat pump and home battery-friendly options (where available)
UK-specific: eligibility, meter set-up, regions, payment methods and common gotchas
Two worked scenarios with realistic assumptions and a clear comparison table

Get your off-peak quote How to compare tariffs

Estimates only. Prices, availability and off-peak windows vary by supplier, region, meter configuration and how you pay.

Fast answer: which off-peak smart meter tariffs tend to be “cheap”?

In the UK, the cheapest off-peak electricity tariffs for smart meters are usually time-of-use (TOU) plans that offer a much lower night or overnight unit rate in exchange for a higher peak rate (and sometimes a different standing charge). They can work well if you can move a meaningful share of your electricity use into the cheap window—typically via EV charging, heat pump scheduling, hot water heating, or a home battery.

What “cheap” means

Not just the off-peak unit rate. You’re looking for the lowest annual cost for your usage pattern once peak rates and standing charge are included.

Who it suits

Homes that can shift roughly 25–40%+ of electricity into off-peak, or that run high-load kit overnight (EV, immersion, storage heaters, battery).

Main watch-outs

Peak windows can be expensive; some tariffs have different rates by region, eligibility rules, or require a working smart meter with half-hourly reads.

Quick rule: An off-peak tariff is usually worth considering when you can reliably schedule high usage into the cheap window (e.g., EV charging after midnight). If most of your use is early evening, a standard single-rate tariff may cost less overall.

Compare off-peak tariffs for your postcode

Energy prices vary by region, payment method and meter set-up. Tell us a little about your home and we’ll match you with suitable off-peak options (where available) and show the estimated annual cost based on your answers.

Tip: If you have an EV, heat pump or battery, mention it in the notes when we contact you—these often change which tariff is best.

What you’ll need (2 minutes)

Your postcode (for regional pricing)
Contact details so we can send your results
Optional: approximate annual kWh from a bill (electricity and gas if you want dual fuel)

Get your quote

How to compare off-peak smart meter tariffs (properly)

Off-peak tariffs can look great in adverts because the cheapest unit rate is highlighted. For a fair comparison, focus on the total cost for your real usage pattern.

1) Identify your off-peak window(s)

Some tariffs offer one overnight window; others have multiple cheap periods. Confirm the exact times and whether weekends differ.

2) Estimate what you can shift

Be honest: how much can you move to off-peak every day? EV charging and hot water are the easiest; cooking and lighting usually aren’t.

3) Check peak and standing charge

A low night rate can be offset by a high peak rate or standing charge. Compare the whole tariff structure.

4) Confirm smart meter requirements

Many TOU tariffs require half-hourly reads and a compatible smart meter configuration. Ask what happens if readings drop out.

5) Look for contract terms

Check exit fees, price changes, and whether the tariff is fixed or variable. Factor in how long you plan to stay.

6) Calculate an annual estimate

Use your annual kWh (from your bill) and a realistic off-peak percentage. Compare against a standard single-rate tariff.

Practical shortcut: If you don’t know your off-peak share, start with 20% (low shift), 35% (moderate shift), 50% (high shift with EV/battery) and see how sensitive the cost is.

Off-peak tariff types (smart meters): a quick comparison

Suppliers name these tariffs differently, but most off-peak smart meter deals fall into the categories below. Use this table to narrow down what to look for, then compare actual rates and times for your postcode.

Tariff type	Typical structure	Best for	Common drawbacks
Overnight off-peak (2-rate)	Two electricity unit rates: off-peak overnight + peak daytime	EV charging, immersion/hot water, storage heaters, predictable night use	Peak rate may be high; you must use enough off-peak to win overall
Multi-rate / TOU (3+ rates)	Multiple time bands (e.g., overnight cheap, daytime standard, evening peak)	Battery users, flexible households, people who can avoid evening peak	More complex; a short expensive peak can dominate costs if you’re not careful
EV-specific off-peak	Very low off-peak for a set overnight window (sometimes requires an EV/charger app)	Drivers with regular overnight charging	Eligibility rules; may have higher daytime rates; integration requirements can change
Legacy Economy 7 / Economy 10	Set off-peak hours (often overnight) tied to older meter setups; some smart meters can replicate	Storage heater homes, some flats with legacy metering	Hours vary by region/meter; switching meter configuration can be slower and sometimes chargeable

Decision checklist: who it suits (and who it doesn’t)

Usually suits you if…

You can schedule EV charging or hot water heating overnight
You have (or plan) a home battery and can charge it off-peak
You can avoid heavy use in the early evening peak (often 4–7pm)
Your household is happy using timers/smart plugs to automate shifting
You understand the peak rate and standing charge could be higher

Often not ideal if…

Most of your usage is 4–10pm (cooking, electric heating, tumble drying)
You can’t reliably access the off-peak window (noise rules, shift work, childcare)
You’re on prepayment and off-peak options are limited in your area
Your smart meter is not communicating and the supplier requires half-hourly reads
You want the simplest bill and don’t want to think about timings

Two realistic scenarios (with numbers)

These examples are illustrative to show the mechanics. Your actual rates depend on supplier, region and payment method. Calculations below include electricity only and assume the same standing charge for simplicity.

Scenario A: no EV, modest shifting

Assumptions: Annual use: 2,900 kWh. Off-peak share: 15% (timers for dishwasher/washing machine).; Single-rate tariff: 24p/kWh.; Off-peak tariff: 13p/kWh off-peak, 30p/kWh peak.
Estimated annual unit cost: Single-rate: 2,900 × 24p = £696; Off-peak: (435 × 13p) + (2,465 × 30p) = £796

What this shows: If you can’t shift much, the higher peak rate can outweigh the cheap night rate.

Scenario B: EV driver charging at night

Assumptions: Annual home use: 3,600 kWh (house) + 1,800 kWh (EV charging at home) = 5,400 kWh.; Off-peak share: 45% (most EV charging + some appliances overnight).; Single-rate tariff: 24p/kWh.; Off-peak tariff: 12p/kWh off-peak, 29p/kWh peak.
Estimated annual unit cost: Single-rate: 5,400 × 24p = £1,296; Off-peak: (2,430 × 12p) + (2,970 × 29p) = £1,152

What this shows: When you can shift a large chunk (often EV), off-peak can reduce the overall unit cost even with a higher peak rate.

Standing charges matter. If an off-peak tariff has a higher standing charge in your region, the break-even point (how much you must shift) increases. Always compare the estimated annual cost including standing charge.

Costs, exclusions and common pitfalls (UK-specific)

Off-peak tariffs can be excellent value in the right home, but the details matter. Here are the issues that most often cause bill surprises.

1) Peak windows are expensive

Many TOU tariffs make up for the cheap overnight rate with a higher day/evening rate. If you run a tumble dryer, oven and electric shower during peak periods, costs can climb fast.

2) Region and payment method affect price

Electricity rates vary across UK regions and can differ for direct debit vs other payment methods. Always compare using your postcode and how you pay.

3) Smart meter set-up & data consent

Some tariffs require half-hourly readings (often via smart meter settings). Ask the supplier what data collection is required and what happens if readings fail.

4) Metering compatibility (Economy 7/E10)

If you have legacy multi-register metering (common in flats or storage-heater properties), confirm the new supplier can support the register set-up you have—or whether changes are needed.

5) Exit fees and fixed terms

Fixed off-peak deals may have exit fees. If you’re renting or may move soon, check the terms and whether you can transfer the tariff to a new address.

6) Direct debit changes

Your monthly direct debit is an estimate based on expected use. With TOU tariffs, suppliers may take time to adjust if your off-peak share changes seasonally.

Before you switch: Ask the supplier to confirm the exact off-peak hours, the peak rate you’ll pay outside that window, the standing charge in your postcode, and any exit fees.

FAQs

Do I need a smart meter for an off-peak tariff?

For most modern time-of-use tariffs, yes—suppliers typically require a working smart meter. Some legacy Economy 7 setups can exist without smart metering, but many households now use smart meters to support multi-rate billing.

What are typical off-peak hours in the UK?

It depends on the tariff. Many offer an overnight window (often around 4–7 hours), but exact times vary by supplier and sometimes by region. Always check your tariff documents or ask the supplier to confirm the hours in writing.

Is Economy 7 the same as a smart meter off-peak tariff?

Not exactly. Economy 7 is a two-rate arrangement with a fixed block of cheaper night electricity. Smart meter TOU tariffs can be similar, but may use different time bands, pricing and eligibility requirements.

Will I definitely save money on an off-peak tariff?

No. Savings depend on your off-peak share, the peak rate, the standing charge, and how consistently you can shift usage. A tariff with a very low night rate can still cost more overall if your peak use is high.

Can renters switch to off-peak tariffs?

Usually yes if you pay the energy bills. If you want a smart meter installed or the meter configuration changed (e.g., multi-register), you may need landlord permission. Always check your tenancy agreement.

Do off-peak tariffs work with solar panels?

They can. If you export solar, you may benefit from using solar during the day and charging a battery (if you have one) off-peak overnight. But it’s important to compare your export payments and import rates together.

What if my smart meter stops sending readings?

Ask your supplier what their process is. Some may estimate usage or revert you to different billing arrangements until readings resume. If your tariff relies on half-hourly data, this can affect accuracy—keep records and submit manual reads if possible.

Can I get off-peak rates on prepayment?

Sometimes, but options can be more limited and vary by supplier and region. If you’re on prepayment and considering switching, compare the full tariff details and consider whether credit meter options are available to you.

Have a specific set-up (EV charger model, heat pump, solar + battery, Economy 7 registers)? Use the quote form above and we’ll help you check tariff compatibility before you switch.

Trust, methodology and sources

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Written by: EnergyPlus Editorial Team
Reviewed by: Energy Specialist
Last updated: March 2026

How we assess “cheap” off-peak tariffs

We treat “cheap” as lowest estimated annual cost for a given household profile, not the lowest advertised off-peak unit rate. When comparing options, we prioritise:

Total estimated annual cost (unit rates + standing charge), using the user’s inputs where available
Tariff structure clarity: off-peak windows, any peak periods, weekend differences
Eligibility constraints: smart meter requirements, half-hourly reads, payment method, region
Contract terms: fixed vs variable, exit fees, price change rules
Suitability for EV/heat pump/battery users (where relevant)

Limitations: Supplier rates change, and some tariffs are available only to certain customers (e.g., existing account holders, specific EV/charger integrations, or limited regions). Always confirm rates and hours in your tariff documents before switching.

Independent UK sources we rely on

Ofgem (UK energy regulator) — guidance on consumer protections and how the market works
Citizens Advice: Energy — switching, billing and complaint routes
GOV.UK: Smart meters — smart meter overview and practical information

We also check supplier tariff documents and eligibility notes where available, but those can change quickly—so we encourage you to confirm key details before switching.

Ready to check your best off-peak options?

Get a personalised quote for your postcode and usage. We’ll help you compare peak vs off-peak costs and flag any eligibility issues before you switch.

Get your off-peak quote Revisit the comparison table

EnergyPlus is whole-of-market comparison for UK homes. We’ll explain how we’ve estimated costs and what assumptions affect your result.

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Updated on 30 Mar 2026