Economy 7 Meter: How It Works and How to Save Money

If you’ve ever looked at your electricity bill and wondered whether there’s a smarter way to pay for the power you use, you may have come across the term “Economy 7.” It’s one of the UK’s oldest time-of-use tariffs, and for the right household, it can still shave a meaningful amount off an annual energy bill. But it isn’t a universal money-saver — for some homes it actually costs more than a standard tariff.

This guide breaks down exactly what an Economy 7 meter is, how it works, what it costs, and how to figure out whether switching makes sense for you.

What Is an Economy 7 Meter?

An Economy 7 meter is a dual-rate electricity meter that records your energy usage in two separate registers: one for daytime (“peak”) consumption and one for a seven-hour overnight (“off-peak”) window. Instead of paying a single flat rate for every unit of electricity you use, Economy 7 charges you a cheaper rate at night and a more expensive rate during the day.

The tariff dates back to the 1970s, when it was introduced to encourage households to shift electricity use into the night, helping to balance demand on the National Grid — particularly from nuclear power stations that produced steady output around the clock. The name comes from the seven off-peak hours you get each night.

To be on an Economy 7 tariff, you need a meter that’s physically capable of recording two rates. This can be a traditional Economy 7 meter with a day and night register, or a modern smart meter running in time-of-use mode.

How Does an Economy 7 Meter Work?

An Economy 7 meter tracks how much electricity you use during peak hours separately from how much you use during off-peak hours, then bills each portion at its own rate. The meter switches automatically between the two rates — you don’t need to do anything manually, aside from occasionally checking that the switch-over is happening at the right time (more on that later).

Day and Night Electricity Rates

Under Economy 7, you’re charged two different unit rates:

• Day (peak) rate: Applies for around 17 hours of the day and is typically higher than a standard single-rate tariff, sometimes by 5–15%.
• Night (off-peak) rate: Applies for around 7 hours overnight and is usually 30–50% cheaper than the day rate.

There’s also a standing charge — a fixed daily fee for being connected to the grid — which applies regardless of which rate register your usage falls into.

What Are the Economy 7 Off-Peak Hours?

The off-peak window is usually seven consecutive hours overnight, though some meters split it into two shorter blocks (for example, part of the evening plus part of the early morning). The exact timing isn’t standardised nationally — it depends on your regional Distribution Network Operator (DNO) and how your specific meter is configured, so the same supplier can offer different off-peak windows to customers in different parts of the country.

The most common windows are:

• 23:00–06:00
• 23:30–06:30
• 00:30–07:30

Your bill or meter display will show your exact off-peak hours. It’s worth checking this yourself rather than assuming, since two neighbours on the same supplier can have different windows depending on their local network.

How Much Does an Economy 7 Meter Cost?

Economy 7 Unit Rates and Standing Charges

Economy 7 rates are covered by Ofgem’s energy price cap, but the cap doesn’t fix the day and night rates individually — instead, it limits what a typical multi-rate household’s combined day and night charges can add up to. Individual suppliers then set their own day and night rates within that overall limit, which is why prices vary between providers.

As a general guide, typical Economy 7 day rates tend to sit somewhere in the low-to-mid 20s (pence per kWh), while night rates are often roughly half that. Standing charges are broadly similar to, or slightly higher than, standard single-rate tariffs. These figures shift with each quarterly price cap update, so always check your own bill or a live supplier comparison for current numbers rather than relying on rates you’ve seen quoted elsewhere.

How to Calculate Your Potential Savings

To work out whether Economy 7 will actually save you money, you need three things:

1. Your total annual electricity usage (in kWh)
2. The rough split between day and night usage — what percentage of your electricity do you actually use overnight?
3. The day and night unit rates on offer, compared with a single-rate tariff

The basic calculation is:

(Day usage × day rate) + (Night usage × night rate) + standing charge

Compare that total against what you’d pay on a single-rate tariff for the same total usage. If the Economy 7 total comes out lower, it’s worth switching.

As a rule of thumb, Economy 7 tends to only pay off once around 40% or more of your electricity use happens during the off-peak window. Below that threshold, the higher day rate usually outweighs the savings from cheaper night electricity.

Is an Economy 7 Meter Cheaper?

It depends entirely on your usage pattern — Economy 7 isn’t automatically cheaper for everyone, and in some cases it can actually cost more than a standard tariff.

Who Can Benefit From Economy 7?

Economy 7 tends to work well for households that can genuinely shift a large chunk of their usage into the night. Good candidates include:

• Homes with night-storage heaters that charge overnight and release heat during the day
• Households with an immersion heater for hot water that can be run on a timer overnight
• People who charge an electric vehicle at home overnight
• Shift workers or households with unusual routines that naturally use more electricity at night
• Anyone able to run high-consumption appliances (washing machines, tumble dryers, dishwashers) on a timer during off-peak hours

When Is Economy 7 Not Worth It?

Economy 7 is usually a poor fit for:

• A typical 9-to-5 household that uses most of its electricity during the day and evening
• Homes heated by gas, with no significant overnight electrical load
• Anyone who works from home or is around during the day, pushing usage patterns away from the off-peak window

For these households, the higher day rate on Economy 7 often costs more than the savings from cheap night electricity — sometimes by a noticeable margin over a year.

Pros and Cons of Economy 7 Meters

Advantages of Economy 7

• Genuinely cheap overnight rates — often around half the price of a standard day rate
• Good fit for specific technology, like storage heaters, immersion heaters and EV charging
• Encourages more mindful energy use, since you can actively shift consumption to save money
• Works with smart meters, so switching or monitoring your usage is easier than with old-style meters

Disadvantages of Economy 7

• Higher day rate than a single-rate tariff, which can outweigh the savings if you don’t use much electricity at night
• Off-peak hours vary by region and meter, so you need to actively check when your cheap window actually is
• Requires behaviour change — the savings only materialise if you actually shift usage to off-peak hours, not just have the tariff
• Older RTS meters are being phased out, which can cause disruption for some existing Economy 7 customers (more below)

How to Read an Economy 7 Meter

Understanding R1 and R2 Readings

Traditional Economy 7 meters display two separate readings, usually labelled:

• R1 — typically your day (peak) reading
• R2 — typically your night (off-peak) reading

Some meters use “Low” and “Normal” instead, or display the readings on a rotating digital screen. When submitting a manual reading, you’ll need to note both numbers separately, since your supplier bills each one at a different rate. If you only submit one figure, your bill may be estimated incorrectly.

How to Read a Smart Economy 7 Meter

On a smart meter, day and night usage is recorded and sent to your supplier automatically, so you typically don’t need to submit manual readings at all. Your in-home display or supplier’s app should show a breakdown of your day versus night consumption, making it easier to check that the split matches what you expect and that your off-peak hours are being applied correctly.

Economy 7 Meter and Smart Meters

Smart meters are fully compatible with Economy 7 and, in most cases, are now the standard way suppliers deliver the tariff. A smart meter can be configured to record time-of-use data automatically, switching between rate registers at the correct times without any manual input.

This matters more than it used to, because many older Economy 7 meters relied on the Radio Teleswitch Service (RTS) — a radio signal used to tell the meter when to switch between day and night rates. The RTS network has been shut down as part of a nationwide upgrade, and households still using RTS-based meters need to arrange a replacement with their supplier to keep dual-rate billing working correctly. If you’re not sure whether your meter relies on RTS, it’s worth contacting your supplier to check.

How to Get an Economy 7 Meter or Switch Tariffs

If you don’t currently have a dual-rate meter and want to switch to Economy 7, the general steps are:

1. Check whether Economy 7 suits your usage pattern using the savings calculation above.
2. Compare Economy 7 tariffs across suppliers, since day and night rates vary significantly between providers.
3. Contact your chosen supplier to request the switch. If you already have a smart meter, this is often just a change to your account settings and tariff — no site visit needed.
4. If you need a new meter installed, your supplier will arrange a visit from a meter operator. This is usually free and takes well under two hours.
5. Confirm your off-peak hours once switched, since these can vary by region and meter.

If you’re already on Economy 7 and simply want to switch suppliers, the process works the same way as switching any other tariff — compare rates, choose a new deal, and your new supplier will typically handle the transfer.

Economy 7 vs Single-Rate Tariff

	Single-Rate Tariff	Economy 7
Number of rates	One flat rate, all day	Two rates: day and night
Day rate	Standard	Usually higher than single-rate
Night rate	Same as day rate	Usually much cheaper
Best for	Typical daytime usage	Households with high overnight usage
Complexity	Simple, predictable	Requires managing when you use electricity

The core trade-off is simple: single-rate tariffs are predictable and straightforward, while Economy 7 rewards households that can genuinely shift usage into the night — and penalises those that can’t.

Economy 7 vs Economy 10

Economy 10 is a less common variant that offers around 10 off-peak hours instead of 7, usually spread across three separate windows — a portion overnight, plus two shorter periods during the day or evening (often around lunchtime and again in the evening).

Economy 10 can suit households that want more flexibility when they access cheaper rates, particularly those with storage heaters that need topping up more than once a day. However, it’s less widely available than Economy 7, and because the off-peak hours are spread out rather than concentrated overnight, the day rate structure and overall savings potential can differ from supplier to supplier. If Economy 10 is available in your area, it’s worth comparing its specific rates and off-peak windows directly against Economy 7 rather than assuming one is automatically better.

Common Economy 7 Meter Problems

A few issues come up repeatedly with Economy 7 meters:

• Incorrect off-peak hours applied — particularly after clock changes for British Summer Time, when some older meters can drift out of sync.
• RTS meters losing their switching signal, as the Radio Teleswitch Service is phased out, potentially causing the meter to stop switching rates correctly.
• Confusing manual readings, especially on older meters where it’s easy to misread or mislabel the R1/R2 registers.
• Estimated bills, if readings aren’t submitted correctly for both registers.
• Overpaying because usage doesn’t match the tariff — the meter and tariff work correctly, but the household’s usage pattern simply isn’t suited to Economy 7.

If you notice unusually high bills or suspect your meter isn’t switching at the right time, contact your supplier to check your meter’s configuration and confirm your actual off-peak hours.

Frequently Asked Questions

Conclusion

Economy 7 isn’t a universal upgrade — it’s a trade-off. You get a genuinely cheap overnight rate in exchange for a higher daytime rate, and the tariff only pays off if you can shift a meaningful share of your electricity use into that off-peak window. For households with storage heaters, overnight EV charging, or an immersion heater on a timer, that trade-off often works strongly in their favour. For a typical daytime household, it usually doesn’t.

Before switching, do the maths on your own usage pattern rather than relying on general assumptions. Check your current bill for your day/night usage split if you can, compare rates across suppliers, and confirm the exact off-peak hours for your area. That’s the only reliable way to know whether an Economy 7 meter will actually save you money — or quietly cost you more.

Economy 7 meters are available in traditional dual-rate and smart meter versions. To learn more about different electricity meter options, explore our electricity meter type Guide.