Is Economy 7 Worth It in 2026? Working Out the Real Savings
Whether an Economy 7 off-peak electricity tariff still makes financial sense in 2026, how the day and night rates compare to a standard single-rate tariff, and who benefits most.
The basic trade-off
Economy 7 swaps a single flat electricity rate for two rates: a discounted rate for roughly seven hours overnight (the exact window depends on region and supplier, often somewhere between 11pm and 8am) and a higher rate for the remaining seventeen daytime hours. The tariff only pays off if you can move a meaningful share of your total electricity consumption into that overnight window — otherwise you are simply paying more for most of your usage in exchange for a discount on a small slice of it.
Worked example: two households, same total usage
Both households use 3,500 kWh of electricity a year. Household A uses 20% of that overnight (700 kWh); Household B, with a storage heater and timed immersion heater, uses 45% overnight (1,575 kWh).
Assume a single-rate tariff at 24.67p/kWh (the current price cap unit rate), versus an Economy 7 tariff with a day rate of 28p/kWh and a night rate of 14p/kWh.
Single-rate cost for both: 3,500 × £0.2467 = £863.45.
Household A on Economy 7: (2,800 × £0.28) + (700 × £0.14) = £784 + £98 = £882 — slightly worse off than staying on the single rate.
Household B on Economy 7: (1,925 × £0.28) + (1,575 × £0.14) = £539 + £220.50 = £759.50 — around £104 a year better off than the single rate.
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Open Electricity Cost calculatorWho genuinely benefits
Economy 7 tends to make financial sense for:
- Homes with electric storage heaters, which are specifically designed to charge overnight.
- Households running an immersion heater on a timer to heat water overnight instead of using gas or a day-rate electric shower.
- Electric vehicle owners who reliably charge overnight (though a dedicated EV tariff may still beat generic Economy 7).
- Anyone who can realistically run high-consumption appliances — washing machines, dishwashers, tumble dryers — on a delay timer set for the overnight window.
It tends to be a poor fit for households with gas central heating, no storage heaters, no EV, and a fairly typical daytime-weighted usage pattern, where the higher day rate simply costs more than the night-rate saving is worth.
Economy 7 vs newer smart tariffs
Some suppliers now offer more flexible time-of-use tariffs, including EV-specific rates with longer or better-timed cheap windows than traditional Economy 7, and some genuinely half-hourly dynamic tariffs that track wholesale prices in more detail. For households with a smart meter and significant flexible usage, it is worth comparing these newer options against traditional Economy 7 rather than assuming Economy 7 is automatically the best off-peak option available.
uk-energy-price-capBottom line
Economy 7 is not universally good or bad — it is a bet that you can shift enough usage into a roughly seven-hour overnight window to offset a higher day rate on everything else. Households with storage heating, timed water heating or overnight EV charging often come out ahead; households with a typical daytime-weighted usage pattern often do not. Run your own numbers against your actual usage split before switching, and check newer smart or EV-specific tariffs as an alternative.
Estimate your costs under different rate structures with the electricity cost calculator.
Sources
- Ofgem: Economy 7 and time-of-use tariffs
- Energy Saving Trust: Understanding your electricity tariff
Frequently asked questions
What is Economy 7?
Economy 7 is a two-rate electricity tariff giving a cheaper unit rate for around 7 hours overnight (exact hours vary by region and supplier) in exchange for a higher unit rate during the remaining 17 daytime hours.
Who typically benefits most from Economy 7?
Households with storage heaters, immersion water heating on a timer, electric vehicle charging overnight, or any other way to deliberately shift a meaningful share of usage into the cheap overnight window tend to benefit most; households using most electricity during the day often end up worse off.
How much cheaper is the Economy 7 night rate typically?
Night rates are commonly around 40–60% of the day rate, though the exact ratio and both rates vary significantly by supplier and region, so a direct comparison against your actual current single-rate tariff is essential rather than relying on rules of thumb.
Does Economy 7 require a special meter?
Yes — a two-rate meter (either a traditional Economy 7 meter or a smart meter configured for time-of-use billing) is needed to record day and night usage separately; a standard single-rate meter cannot bill an Economy 7 tariff.
Is Economy 7 still relevant with modern smart meters and newer time-of-use tariffs?
Economy 7 remains available, but many suppliers now also offer more granular smart time-of-use tariffs with different windows and rate structures, some specifically designed around electric vehicle charging, which can offer a better deal than traditional Economy 7 for households with the right usage pattern.
Can Economy 7 be a bad deal if you don't shift usage to the night rate?
Yes — if only a small share of consumption happens overnight, the higher daytime rate on the remaining majority of usage can leave a household worse off overall than staying on a standard single-rate tariff, which is the single most common Economy 7 mistake.
How do storage heaters interact with Economy 7?
Storage heaters are specifically designed to charge overnight on the cheap Economy 7 rate and release heat through the day, which is one of the main historical reasons the tariff exists — but storage heaters are also less efficient and less controllable than modern heating systems, which is a separate consideration.
Should an electric vehicle owner use Economy 7 or a dedicated EV tariff?
Many suppliers now offer dedicated EV tariffs with an even cheaper, longer overnight window specifically timed for vehicle charging, which often beats standard Economy 7 for EV owners — it is worth comparing both rather than defaulting to Economy 7.
Does Economy 7 affect standing charges?
Standing charges on Economy 7 tariffs are usually similar to or sometimes slightly higher than single-rate equivalents, reflecting the additional metering infrastructure, so they should be included in any comparison rather than focusing only on unit rates.
Where can I model whether Economy 7 would save me money?
The electricity cost calculator can be used to estimate costs under a single-rate tariff, which you can then compare manually against Economy 7's day and night rates applied to your estimated split of daytime versus overnight usage.
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