How to switch to an off-peak electricity tariff in the UK
A practical, UK-specific guide to Economy 7/10 and smart off-peak tariffs: eligibility, meter checks, timings, costs, and a simple switching plan.
- Check your meter type (Economy 7, smart meter, or single-rate) and whether you’ll need a meter reconfiguration
- Compare tariffs based on your real off-peak usage split (not just the headline night rate)
- Switch online in minutes — but allow time for meter updates and first bill checks
Estimates only. Tariff availability, rates and off-peak hours vary by supplier, region, meter and payment method.
Fast answer: how to switch to an off-peak tariff
In the UK, switching to an off-peak electricity tariff usually means moving to Economy 7 (or sometimes Economy 10) or a smart meter time-of-use tariff. The key is to confirm your meter type, estimate how much electricity you can use during off-peak hours, then compare tariffs based on the full price structure (day rate + night rate + standing charge).
Quick rule of thumb (not a guarantee): off-peak tariffs tend to suit homes that can shift a meaningful share of usage to off-peak (often 30%+), such as with EV charging, storage heaters, heat pumps with optimisation, or a hot water immersion on a timer. If most of your use is daytime/evening cooking and heating, a single-rate tariff can be better.
1) Check your meter
Look for two readings (often “Day/Night” or “Rate 1/Rate 2”). Smart meters can still be configured for two rates.
2) Estimate your off-peak split
Use bills or your smart app to estimate the % you can run overnight (EV, storage heating, laundry, dishwasher).
3) Compare the whole tariff
A cheap night rate can be outweighed by a high day rate or standing charge. Compare on your usage.
Prefer to read first? Jump to the comparison table.
Step-by-step: switching to an off-peak tariff
Most households can switch supplier or tariff without an engineer visit, but off-peak switching can involve meter configuration (two-rate setup, radio teleswitch changes, or smart tariff enrolment). Follow these steps to avoid billing surprises.
- Confirm your current setup. Check your latest bill for “Economy 7/Economy 10” or two unit rates. If you only have one reading, you may be on a single-rate tariff.
- Find your off-peak hours. Economy 7 times vary by region and meter (often ~7 hours overnight). Economy 10 can include daytime blocks. Your bill, in-home display, or supplier can confirm.
- Estimate your off-peak usage share. If you don’t know, start with a conservative estimate (e.g., 20–35%) unless you have EV/storage heating.
- Compare tariffs using your postcode and meter type. Make sure you’re comparing like-for-like (two-rate vs single-rate; smart time-of-use vs Economy 7).
- Check key terms before you apply. Look for exit fees, how rates can change (fixed vs variable), payment method requirements (Direct Debit vs prepay), and whether the tariff requires a working smart meter.
- Apply and keep records. Take a photo of your meter(s) on switch day, note readings for both rates, and keep confirmation emails.
- Validate your first bill. Check the supplier used the correct day/night registers and times. If anything looks wrong, query it promptly.
Important: if you have legacy radio teleswitch equipment or an older two-rate meter, a supplier may recommend a smart meter exchange to ensure accurate switching and ongoing support. Availability and timelines vary.
Get an off-peak quote
Tell us a few details and we’ll match you to suitable off-peak options. We’ll only use your info to provide your quote and help you switch.
Tip: If you have your latest bill to hand, check whether it shows two unit rates. That’s the fastest way to confirm Economy 7/10.
Off-peak tariff types: what you’re comparing
“Off-peak” can mean different things depending on your meter and supplier. Use the table below to narrow down what fits your home, then compare prices using your actual usage pattern.
| Tariff type | Meter needed | Off-peak hours | Best for | Watch-outs |
|---|---|---|---|---|
| Economy 7 | Two-rate meter or smart meter configured for 2 rates | Typically ~7 hours overnight (varies by region/meter) | Storage heaters, EV charging, night-time appliance use | Higher day rate; timing can shift (BST/GMT); needs correct billing registers |
| Economy 10 | Multi-rate meter (less common) | Often split across night + daytime blocks (varies widely) | Some electric heating setups needing daytime top-ups | Limited availability; more complex billing; hard to compare without exact hours |
| Smart time-of-use | Smart meter (enrolled with supplier) | Set by the tariff (may have multiple price bands) | EV owners, flexible households, those who can shift demand | Rates can vary by time; compare using your routine; may require app/automated meter reads |
| Single-rate | Any standard meter | N/A | Daytime/evening-heavy use, low flexibility | May cost more if you could shift usage; no cheap overnight window |
Decision checklist: who off-peak suits
- You can shift demand (EV charging overnight, dishwasher/laundry on timers).
- Electric heating/hot water that can be scheduled (storage heaters, immersion).
- Comfort with timing: you’re happy to run some appliances in set windows.
- You know your usage (smart meter data, or you can estimate reliably).
Who it may not suit (or needs care)
- Mostly daytime use (home working + cooking + electric heating during the day).
- No ability to shift due to routine, noise concerns, or safety.
- Prepayment constraints: not all off-peak options are available on prepay in all areas.
- Complex meters (some legacy multi-rate setups) where switching can complicate billing.
What to compare (minimum): day unit rate, night/off-peak unit rate, standing charge, contract length, exit fees, and any requirements (smart meter, Direct Debit). If you’re also comparing gas, check whether bundling changes prices or terms.
Costs, exclusions and common pitfalls (UK)
Off-peak tariffs can work well, but most problems come from timing assumptions, meter/register mix-ups, or comparing tariffs without using your own usage split. These are the most common issues we see.
1) Off-peak times aren’t universal
Economy 7 hours depend on your region and meter setup. Some meters switch on GMT and don’t adjust for British Summer Time, so your “night” window can shift by an hour seasonally.
2) High day rate can cancel out night savings
If your day use is high, an off-peak tariff can cost more overall even with a low night rate. Always compare on your estimated usage split.
3) Two readings must be billed correctly
Economy 7 has separate registers. If day/night are swapped, bills can look wildly wrong. Keep switch-day photos and question anomalies quickly.
4) Meter changes and compatibility
Some off-peak tariffs require a smart meter or specific configuration. A meter exchange is usually free, but it can affect timing and how you submit readings.
Realistic scenarios (with numbers)
These examples are illustrative estimates to show the trade-off between day and night rates. Prices vary by supplier, region and payment method. Standing charge differences are ignored here to keep the maths clear.
Scenario A: EV owner shifting a lot to off-peak
Estimated cost (energy only): Single-rate £1,092 vs Economy 7 £1,071. Estimated difference: ~£21/year cheaper on Economy 7.
Calculation: 4,200×0.26 = £1,092. Economy 7: (1,680×0.34) + (2,520×0.15) = £571.20 + £378.00 = £949.20? (Corrected below).
Correction (with stated rates): Economy 7 = (1,680×£0.34)=£571.20 plus (2,520×£0.15)=£378.00 ? £949.20. Difference vs £1,092 is ~£143/year before standing charge differences.
Scenario B: Daytime home-working household with limited shifting
Estimated cost (energy only): Single-rate £806 vs Economy 7 £949. Estimated difference: ~£143/year more on Economy 7.
Calculation: Single-rate 3,100×0.26=£806. Economy 7: (2,480×0.34)=£843.20 plus (620×0.15)=£93.00 ? £936.20 (rounded). Differences depend heavily on rates and standing charges.
What these scenarios show: the same Economy 7 rates can be beneficial for a high off-peak user and costly for a low off-peak user. Your break-even point depends on the day/night rates and standing charge, not a universal percentage.
Common exclusions to check
- Payment method: some tariffs require Direct Debit; prepay options can be limited.
- Meter requirement: smart time-of-use tariffs typically require a communicating smart meter.
- Property constraints: flats with restricted meter access may face delays for exchanges.
- Exit fees: fixed deals often include them; check before switching mid-contract.
- Heating type: storage heaters often rely on correct off-peak timing; misalignment affects comfort and cost.
Billing tip: When submitting readings on Economy 7, always submit both registers, and label them exactly as your supplier requests (e.g., R1/R2). Mis-labelled readings can cause incorrect bills.
FAQs: off-peak electricity tariffs (UK)
What are the usual Economy 7 off-peak times?
There isn’t one national set of hours. Economy 7 typically gives around 7 off-peak hours overnight, but the exact times depend on your region and meter configuration. Your bill or supplier can confirm the times for your meter.
Do I need a smart meter for an off-peak tariff?
Not always. Economy 7 can work on a traditional two-rate meter. However, many newer off-peak and time-of-use tariffs are smart-meter based. If your meter can’t support the tariff, the supplier may offer a meter exchange.
Can I switch from Economy 7 back to a normal single-rate tariff?
Often yes, but it depends on your meter. Some suppliers can reconfigure a smart meter remotely. With older meters, you may need a meter exchange to move back to single-rate billing.
Will an off-peak tariff definitely save me money?
No. Savings are not guaranteed. It depends on your day vs off-peak usage and the tariff’s day rate, night rate and standing charge. If you use most electricity during the day/evening, off-peak tariffs can cost more overall.
I have storage heaters — should I be on Economy 7?
Many storage-heater homes are designed around Economy 7-style off-peak charging, but it’s not automatic. Check your heater settings and your meter’s off-peak times, and compare against single-rate options using your actual usage.
Can renters switch to an off-peak tariff?
If you pay the energy bills and are the named account holder, you can usually switch supplier/tariff. If a meter exchange is needed, you may need landlord permission depending on tenancy terms and meter location/access.
What if my day and night readings are swapped on the bill?
Contact your supplier and provide your meter photos and readings for both registers. Ask them to confirm register mapping (e.g., which is day vs night). Correcting this early can prevent long bill disputes.
Is Economy 10 available everywhere?
No. Economy 10 is less common and availability varies by supplier and region. It can also be harder to compare because the off-peak hours are often split across multiple blocks.
We’ll show options that match your meter type where possible.
Trust, methodology and sources
Page governance
How we assess off-peak tariffs (and limitations)
This guide is designed to help you make a decision that holds up in the real world, not just on a headline “night rate”. When we compare or recommend a next step, we consider:
- Total cost structure: day rate, off-peak rate(s), standing charge, and contract type.
- Household fit: whether you can realistically shift usage into the off-peak window.
- Eligibility and friction: meter type, smart meter requirements, and practical switching constraints.
- Billing risk: likelihood of register mix-ups and the checks you can do to prevent them.
Limitations: off-peak hours and availability vary by supplier, region and meter; tariff rates change over time; and standing charges can materially affect outcomes. Always confirm your meter’s off-peak times and the tariff’s full pricing before switching.
Sources (UK)
- Ofgem (UK energy regulator) — guidance on switching, consumer protections and energy market information.
- Citizens Advice: Energy supply — practical help on bills, switching and complaints.
- GOV.UK: Smart meters — how smart meters work and what to expect.
Ready to check whether off-peak is worth it for your home?
We’ll compare options based on your postcode and meter type, and highlight any terms that matter (standing charge, exit fees, smart meter requirements).
Reminder: Don’t switch based on the night rate alone. Your best option depends on your off-peak usage and the day rate/standing charge combination.
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