Can I switch to a cheaper time-of-use tariff in the UK?

Yes. If you have a compatible meter (typically a smart meter) and your supplier offers a time-of-use tariff, you can usually switch. Availability, rates and rules vary by supplier, so compare the peak/off-peak prices and any standing charge before changing.

Do I need a smart meter to get a time-of-use tariff?

In most cases, yes—time-of-use tariffs generally require a smart meter so your usage can be recorded by time period. Some legacy multi-rate meters (e.g., Economy 7) may support specific off-peak tariffs, but modern time-of-use plans are typically smart-meter based.

How do I know if a time-of-use tariff will actually be cheaper for me?

A time-of-use tariff can be cheaper if you can shift more electricity use into off-peak or cheaper periods. Check your current usage patterns (smart meter app, bills or half-hourly data) and estimate what percentage you can move—e.g., EV charging, washing/drying, dishwashing, immersion heater or storage heating—then compare the total cost including standing charges.

What are the risks of switching to a time-of-use tariff?

The main risk is paying more if you use lots of electricity during peak (higher-rate) hours. Also check for higher standing charges, exit fees (if any), and whether prices can change. If your routine can’t shift usage, a standard tariff may be better value.

Can I switch time-of-use tariff without changing supplier?

Often yes. Many suppliers let you change tariff without switching provider, subject to eligibility and meter type. If your current supplier doesn’t offer a suitable time-of-use option, you may need to switch supplier to access one.

Will switching tariffs affect my energy supply or cause downtime?

No—your electricity supply shouldn’t be interrupted when you switch tariffs (with the same supplier) or switch suppliers. The change is administrative and billing-related, provided your meter can support the tariff.

How long does it take to move to a time-of-use tariff?

It can be as quick as a few days when changing tariff with your current supplier, but it may take longer if you need a smart meter installation or if you switch suppliers. Your provider should confirm the start date and rates before it goes live.

Can I move back to a standard tariff if a time-of-use tariff doesn’t suit me?

Usually yes, although rules vary. Before switching, check the tariff’s terms for any minimum periods, exit fees, or whether you must wait until the end of a fixed term to change again.

What should I compare when choosing a cheaper time-of-use tariff?

Compare (1) peak and off-peak unit rates, (2) the exact time windows, (3) standing charge, (4) whether it’s fixed or variable, (5) any fees/penalties, and (6) whether your household can shift enough usage. If you drive an EV or can run appliances overnight, time-of-use can be particularly cost-effective.

How do I get help choosing the best tariff for my home?

If you want help reviewing your current tariff and whether time-of-use could reduce your bills, contact Energy Plus for guidance and options: https://www.energyplus.co.uk/

Can I move to a cheaper time of use tariff in the UK?

Yes — if you’ve got a compatible smart meter and you can shift some electricity use to off-peak times, you may be able to cut bills. Compare whole-of-market time of use tariffs (including EV and smart tariffs) and see if switching could save you.

Whole-of-market comparison for UK homes
See if a cheaper off-peak rate fits your routine
Switching support and plain-English guidance

Check time of use tariffs How time of use works

For domestic properties in Great Britain. Savings depend on usage patterns, meter compatibility and tariff availability.

Check if you can switch to a cheaper time of use tariff

A time of use tariff (sometimes called a smart tariff) charges different electricity rates at different times of day. If you can run some appliances during off-peak hours — for example overnight charging, tumble drying, or running a dishwasher — you may pay less overall.

EnergyPlus helps UK households compare options across the market. We’ll help you answer the key questions that affect price:

Do you have a smart meter? Many time of use tariffs require one (typically SMETS2, or a compatible SMETS1).
How much electricity can you shift? The bigger the share you move to off-peak, the more likely you are to save.
Are you on electricity only? Most time of use deals apply to electricity; gas is usually a standard single rate.
Is your tariff window right for you? Off-peak periods vary by supplier.

Quick reality check: a cheap overnight rate can be paired with a higher peak rate. If most of your usage stays in the evening peak, you could pay more. The goal is to match the tariff to your lifestyle, not just chase the lowest headline rate.

Get a time of use comparison

Fill in your details to see suitable off-peak, EV and smart tariffs for your home.

Is a time of use tariff right for you?

Time of use can be cheaper — but only for the right household. Use these quick checks to decide whether it’s worth comparing.

You can shift usage off-peak

If you can run high-use appliances later at night or outside peak hours, you’ll benefit most. Think: washing machine, dishwasher, immersion heater, electric heating, dehumidifier.

You have an EV or home battery

EV charging and battery scheduling can move a lot of demand into cheaper windows. Some tariffs are designed specifically for EV owners.

You’re happy with variable pricing

Some smart tariffs change rates by time blocks, day-ahead prices, or live wholesale signals. If you prefer simplicity, a single-rate tariff may suit you better.

You’ve got (or can get) a smart meter

Most time of use tariffs require half-hourly readings. If you don’t have a smart meter, you can usually request one (subject to availability and property suitability).

You can avoid evening peaks

Many households use most electricity between 4pm–9pm. If your routine is fixed (cooking, heating, laundry), check peak rates carefully.

You want control, not guesswork

A good comparison uses your likely usage pattern — not just the cheapest off-peak unit rate. EnergyPlus helps you sense-check the tariff structure before you switch.

How time of use tariffs work (UK)

With a standard electricity tariff you pay one unit rate whenever you use power. With time of use, your unit rate changes depending on the clock (and sometimes the day). This is designed to encourage cheaper consumption when the grid is less busy.

Common types of time of use tariff

Type	What it means for your bill
Day / night (two-rate)	Cheaper overnight rate; higher day rate. Best if you genuinely use a lot overnight.
3-rate (e.g. peak / shoulder / off-peak)	More time blocks. Can suit households that avoid the peak window.
EV smart tariff	Very cheap charging window, sometimes with different rates for the rest of the day.
Agile / dynamic pricing	Rates change frequently (often half-hourly). Potentially low cost if you can respond to price signals; higher risk if you can’t.
Heat pump / electric heating tariffs	Designed for homes with higher electricity demand. Off-peak heat storage or scheduled heating can help.

What you typically need to switch

Smart meter readings: most time of use tariffs require automatic readings, often half-hourly.
Permission for half-hourly data (where applicable): suppliers may ask you to opt in so they can bill accurately.
A compatible set-up: EV tariffs may require a compatible charger, app, or vehicle connection.
Flexibility: plan which devices you’ll run off-peak so the tariff works in practice.
A check on exit fees: some fixed deals have exit fees; many variable tariffs don’t.

Tip: If you’re not sure how much you use overnight, look at your smart meter in-home display (if you have one) or ask your supplier for a usage breakdown. Even a simple week-long check can help you decide.

Will a cheaper time of use tariff actually save you money?

Savings come from moving enough kWh into the cheaper window to outweigh any higher peak rate and standing charge. That’s why “cheapest off-peak rate” doesn’t automatically mean “lowest bill”.

The three numbers that matter

Off-peak unit rate (p/kWh) — what you pay in the cheaper window.
Peak / day unit rate (p/kWh) — what you pay most of the time.
Standing charge (p/day) — can vary by region and supplier.

A tariff can look great on the off-peak rate but still lose out if the peak rate (or standing charge) is significantly higher than your current deal.

Simple ways to increase off-peak usage

Use delay-start on laundry and dishwasher (if safe to do so).
Schedule EV charging for the cheap window only.
Pre-heat hot water (immersion) overnight if your set-up allows.
Batch cooking earlier or later to avoid the most expensive peak period.
Consider a smart plug to control specific devices.

Important: Always prioritise safety. Avoid running appliances unattended if the manufacturer advises against it. If you have medical equipment at home, don’t change routines in a way that adds risk.

Eligibility and switching rules (UK households)

Can you switch if you’re in debt?

You may still be able to switch, but rules can depend on how you pay and the size/type of debt. If you’re on a prepayment meter, there may be additional restrictions. If you’re unsure, compare options first and we’ll help you understand what’s possible.

What if you’re renting?

If you pay the energy bill and your tenancy allows you to choose your supplier, you can usually switch. If bills are included in rent, you typically can’t. Time of use tariffs still require a compatible meter set-up.

Do you need a smart meter?

In most cases, yes. Time of use pricing relies on recording when you used electricity. If you don’t have a smart meter, some suppliers may install one as part of the switch (subject to availability and your property).

What about Economy 7 / legacy meters?

Some homes already have a two-rate meter (historically used with storage heaters). You may be able to move to a modern time of use or smart tariff, but it’s important to check meter compatibility and whether your heating/hot water is wired for multi-rate supply.

Great Britain vs Northern Ireland: Energy tariffs and market arrangements differ in Northern Ireland. This page focuses on Great Britain (England, Scotland and Wales).

Common mistakes when moving to a time of use tariff

Only comparing the off-peak rate

Peak rates and standing charges can outweigh off-peak savings. Compare the full structure using your likely usage split.

Underestimating evening usage

Cooking, lighting, entertainment and heating often cluster at peak time. A quick check of your routines can prevent bill surprises.

Assuming all smart tariffs are the same

Windows, rules and eligibility differ by supplier. EV tariffs can require app integration; dynamic pricing can change daily.

Switching without checking exit fees

If you’re on a fixed deal, there may be an early exit fee. It can still be worth it — but check first.

Not planning appliance scheduling

The tariff only becomes “cheaper” if you use it strategically. Set reminders or use timers where safe.

Ignoring data sharing choices

Some tariffs require half-hourly consumption data. Make sure you understand what you’re consenting to and why.

Time of use tariff FAQs

Can I move to a time of use tariff without a smart meter?

Usually not. Time of use billing needs meter data that shows when you used electricity. If you don’t have a smart meter, you can still compare and then check whether the supplier can install one for you.

Do time of use tariffs apply to gas?

Most are electricity-only in terms of time-based pricing. Your gas price is typically a single unit rate plus standing charge, even if you take dual fuel with the same supplier.

Is Economy 7 the same as a time of use tariff?

Economy 7 is a type of time of use (two-rate) arrangement, traditionally aimed at storage heaters with a set overnight period. Modern time of use tariffs can have different windows and may be more flexible.

Could I end up paying more?

Yes, it’s possible if most of your usage happens during peak hours and the peak unit rate is higher than your current tariff. That’s why we recommend checking your likely usage pattern before switching.

How quickly can I switch?

Switching times can vary by supplier and circumstances (meter set-up, data permissions, and any required installations). In many cases you can switch without disruption to your supply.

What information should I have ready?

Your postcode, current supplier (if known), and a sense of when you use electricity (even roughly). If you have an EV, it also helps to know your typical charging times.

Ready to check a cheaper time of use tariff?

Compare whole-of-market options and see which smart or off-peak tariff suits your home. If it doesn’t stack up, you’ll know before you switch.

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Updated on 21 Dec 2025