How to switch to an Economy 7 tariff in the UK
A practical, UK-specific guide to switching (and knowing if it’s worth it). Learn what you need, how the process works, and how to avoid common meter and billing pitfalls.
- Check if your meter and heating setup are suitable before you switch
- Estimate whether your night-use is high enough to benefit (with examples)
- Compare whole-of-market options and switch with minimal hassle
Estimates only. Tariffs, standing charges, and Economy 7 hours vary by region, meter type, and supplier. Always check your tariff information label before switching.
Fast answer: how to switch to Economy 7
To switch to an Economy 7 tariff in the UK, you’ll usually need an Economy 7 capable meter (or a compatible smart meter setup) and a usage pattern where a meaningful share of your electricity is used during night-rate hours. You can then compare tariffs, apply with a supplier (or via EnergyPlus), and your new tariff typically starts within a few working days once your meter setup is confirmed.
Key caveat: “Economy 7” isn’t one fixed set of hours. Night-rate times can vary by region, supplier and meter type. Always confirm your exact off-peak window before switching.
When Economy 7 tends to suit
- Storage heaters or electric wet system designed for off-peak charging
- EV charging overnight
- You can shift laundry/dishwasher/hot water heating to night hours
- Your home is all-electric (no gas) and you control when heavy loads run
When it often doesn’t
- Most usage is daytime/evening (WFH, electric cooking, tumble dryer at peak times)
- You have gas central heating and low overnight electric use
- Your meter is single-rate and you can’t (or don’t want to) change it
- You’re in a block with complex metering (landlord/heat network arrangements)
What you’ll need
- Your postcode
- Tariffs and rates differ by region/network.
- Meter type & readings
- Economy 7 typically has two registers (day + night).
- Your usage split
- Rough % used overnight (or an estimate based on appliances/EV).
How switching to Economy 7 works (step by step)
Switching is usually straightforward, but the details depend on your meter and whether you’re changing meter configuration at the same time.
- Check your meter setup
Look for two electricity readings (often labelled Rate 1 / Rate 2, Day / Night, or similar). If you only have one reading, you may need a meter exchange or smart meter configuration. - Check your heating/hot water controls
Economy 7 is most effective when storage heaters, immersion heaters, or EV chargers run during off-peak hours. Make sure timers/controls are working and set correctly. - Estimate your night-use share
As a rough rule, Economy 7 tends to work best when a significant portion of electricity is used overnight. Your break-even point depends on the gap between day and night unit rates and standing charge. - Compare tariffs
Use a whole-of-market comparison (where available) and check: day rate, night rate, standing charge, exit fees, payment method options (Direct Debit/prepay), and tariff end dates. - Apply and confirm details
When you apply, you’ll be asked for address details, current supplier and (sometimes) meter serial number. Take a meter reading on switch day to avoid billing issues. - New tariff goes live
If it’s a tariff-only change (no meter work), it can be quick. If you need a meter exchange/config change, timings depend on appointment availability and site access.
Tip: If you have a smart meter, Economy 7 can sometimes be enabled as a tariff configuration without physically replacing the meter. Your supplier will confirm what’s possible for your specific setup.
Get an Economy 7 quote
Tell us a few details and we’ll show suitable tariffs for your home. We’ll only use your information to provide your quote and help you switch.
Before you apply: quick meter check
Two readings?
Economy 7 meters typically show two registers (e.g. R1/R2). Take photos of both.
Label meanings vary
On some meters, “Rate 1” may be night and “Rate 2” day (or vice versa). Don’t assume—verify with your supplier.
Storage heaters?
If you have them, check they actually charge overnight (warm in the morning). Faulty timers can wipe out any benefit.
Economy 7 vs single-rate: what to compare
Economy 7 can look cheaper because of the night rate, but the day rate is usually higher. The right choice depends on your overnight usage split and the difference between rates (plus standing charge).
| Compare item | Economy 7 | Single-rate | Why it matters |
|---|---|---|---|
| Unit rates | Two rates: day + night | One rate all day | If you don’t use enough overnight, a higher day rate can cost more overall. |
| Off-peak hours | Set window (varies) | Not applicable | If your off-peak window doesn’t match your routine (or EV schedule), savings may disappear. |
| Standing charge | Can be similar or different | Varies by tariff | Small differences add up over a year, especially for low users. |
| Meter & billing | Two readings / two registers | One reading | Incorrect register mapping can cause mis-billing (e.g., night billed as day). |
| Exit fees / term | Some fixed deals charge fees | Some fixed deals charge fees | If you’re unsure, a tariff without exit fees can reduce risk. |
Decision checklist (quick, practical)
- I can run big loads overnight (EV, immersion, storage heaters, washing machine).
- I know (or can confirm) my off-peak hours and they fit my routine.
- I’m comfortable tracking two readings (or I have a smart meter that reports them).
- I’ve checked the day rate isn’t so high it outweighs the night savings.
- I’ve checked any exit fees on my current tariff and the new tariff.
Two realistic scenarios (with numbers)
These examples are illustrative to show the logic. Rates vary by region/supplier and change over time.
Scenario A: EV + timers (often suits Economy 7)
Usage: 4,200 kWh/year. Off-peak share: 55% (EV charging + dishwasher/laundry overnight).
Assumed rates: E7 day 32p/kWh, E7 night 14p/kWh; single-rate 26p/kWh. Standing charges assumed equal for simplicity.
Estimated annual unit cost:
E7: (1,890 kWh × 32p) + (2,310 kWh × 14p) ˜ £928.20
Single: 4,200 kWh × 26p ˜ £1,092.00
Estimated difference: ~£164/year cheaper on E7 (before any standing charge differences).
Scenario B: Gas heating + daytime use (often doesn’t)
Usage: 2,700 kWh/year. Off-peak share: 20% (mostly evening cooking + WFH).
Assumed rates: E7 day 33p/kWh, E7 night 15p/kWh; single-rate 26p/kWh. Standing charges assumed equal for simplicity.
Estimated annual unit cost:
E7: (2,160 kWh × 33p) + (540 kWh × 15p) ˜ £793.80
Single: 2,700 kWh × 26p ˜ £702.00
Estimated difference: ~£92/year more expensive on E7.
What to take from this: the bigger the gap between day and night rates, the more you need to shift to night usage. Also compare standing charge, which can change the result.
Costs, exclusions, and common pitfalls (UK)
Most switching issues come down to meter configuration, reading the right registers, or expecting the night rate to apply at the wrong time. Use the checks below to reduce the risk.
1) Meter exchange or reconfiguration
If you don’t have a two-rate setup, you may need a smart meter configuration change or a meter exchange appointment. Availability and rules vary by supplier and property access (e.g. flats with managed meter rooms).
Check: Ask your supplier whether your current meter can support Economy 7 and whether any costs apply before you commit.
2) Off-peak hours not matching your routine
Economy 7 hours often fall overnight, but exact times can differ (and may change with meter time settings). If your EV or immersion heats outside the cheap window, you’ll pay the day rate.
Check: Confirm the off-peak window in writing (tariff information label / welcome email) and align timers accordingly.
3) Register confusion (day vs night)
Some meters label registers as Rate 1/Rate 2 without saying which is day. If the supplier maps the registers incorrectly, bills can look wrong.
Check: Take readings at two times (e.g. late afternoon and after off-peak begins) to see which register advances, then keep photos.
4) Exit fees and tariff terms
Fixed tariffs can have exit fees. Variable tariffs usually don’t, but rates can change. Also check how long the Economy 7 deal lasts and what happens when it ends.
Check: Look for “exit fee” and “end date” in the tariff summary before you agree.
5) Prepayment and tenancy constraints
Some Economy 7 options are limited for prepayment meters, and tenants may face restrictions if the landlord controls heating or meter access. You can usually switch supplier as the bill payer, but check your tenancy terms.
6) “Economy 7” vs other time-of-use tariffs
Some suppliers offer other time-of-use tariffs (e.g. EV-specific) that may beat a standard Economy 7 deal for certain patterns. If you have an EV, compare those too where available.
Billing accuracy tip: On the day your new tariff starts, take clear photos of your meter display(s). If you later need to raise a billing query, time-stamped photos can make it much faster to resolve.
FAQs about Economy 7 switching (UK)
Do I need a special meter for Economy 7?
Usually, yes. Economy 7 needs a meter setup that can record day and night usage separately (two registers). Many smart meters can be configured for this, but not all properties/metering arrangements support every configuration—your supplier will confirm.
What are the Economy 7 off-peak hours?
There isn’t one universal set of hours. Your off-peak window depends on region and meter setup. Your supplier should provide the exact hours in your tariff information or welcome details. If you’re unsure, ask them to confirm in writing.
Can I switch to Economy 7 if I have a smart meter?
Often, yes. A smart meter can support multi-rate billing if it’s configured correctly. In some cases it’s a tariff configuration change; in others, the supplier may need to book work or confirm technical compatibility. Always check before you switch, especially if you’re relying on off-peak charging for heating or an EV.
Will Economy 7 be cheaper for me?
Not always. Economy 7 tends to help if you use a meaningful share of electricity overnight (for example, storage heaters, immersion heating, or EV charging). If most of your use is daytime/evening, the higher day rate can outweigh any night-rate benefit. Comparing with your postcode and your day/night split gives the most reliable answer.
How do I read my Economy 7 meter?
Economy 7 meters show two readings. The labels vary (Rate 1/Rate 2, Day/Night). The safest approach is to note the readings, then check again after the off-peak window starts to see which register increases. Keep photos and submit both readings if your supplier asks for them.
Can tenants switch to Economy 7?
If you pay the electricity bill, you can usually choose your supplier and tariff. However, if you need a meter exchange or access to a communal meter room, you may need permission or coordination with your landlord/managing agent. Check your tenancy agreement and ask your supplier what’s required.
Does switching affect my electricity supply?
Supplier switching is designed to be seamless, with no interruption to your electricity in normal circumstances. If you also need a meter appointment, there may be a short planned interruption while the meter work is done.
What if I switch to Economy 7 and then change my mind?
You can usually switch tariff or supplier again, but check for exit fees on fixed deals. If you’ve had a meter exchange, switching back to single-rate may require another configuration change—ask your supplier what that involves before you proceed.
Trust, methodology and sources
Page credentials
- Written by
- EnergyPlus Editorial Team
- Reviewed by
- Energy Specialist
- Last updated
- April 2026
How we assess whether Economy 7 is worth it
We focus on the factors that make the biggest difference to real bills:
- Day vs night unit rates and the size of the gap between them
- Your estimated off-peak share (how much you can realistically shift)
- Standing charge differences by tariff and region
- Meter compatibility and the likelihood of register/billing issues
- Tariff terms (fixed/variable, exit fees, payment method restrictions)
Limitations: The example calculations on this page exclude standing charge differences and assume rates stay constant for a year. Your actual outcome depends on your exact regional rates, meter times, and usage behaviour.
Independent UK sources we use
- Ofgem (UK energy regulator) – guidance on switching, consumer protections and market rules
- Citizens Advice: Energy – practical consumer advice on billing, meters and complaints
- GOV.UK: Energy bills and support – official government information on bills and help available
We also refer to supplier tariff information labels and meter guidance where relevant, as availability and configurations vary by supplier and region.
Ready to check if Economy 7 is right for your home?
Compare whole-of-market home energy tariffs available in your area, with clear rates and a switch process designed to minimise meter and billing surprises.
Note: If you’re unsure whether you have an Economy 7-capable meter, submit the form and add “Not sure” under meter type—our team can guide you on what to check next.
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