Can I switch to a cheaper single-rate electricity tariff?
Yes—if you’re on Economy 7/10, a smart time-of-use tariff, or have shifted your usage to evenings. This guide explains who single-rate suits, what to check on your meter and bills, and how to switch safely in the UK.
- Find out if a single-rate tariff would likely lower your annual cost (based on your day/night use)
- Understand eligibility: meter type, region rules, landlord situations, and payment method differences
- Compare options and switch via a trust-led whole-of-market quote
Estimates only. Tariffs, availability and eligibility vary by supplier, meter type, payment method and region.
Fast answer: you can usually switch—if your meter and usage fit
In the UK, most households can switch to a single-rate electricity tariff. It’s often cheaper if you use most of your electricity in the day (or you don’t use much overnight). But if you rely on off-peak electricity for storage heaters, immersion heating, or overnight EV charging, a single-rate tariff may cost more.
Key takeaways
- Single-rate suits you if less than roughly 25–35% of your electricity is used off-peak (depends on your prices).
- Check your bill for two unit rates (day/night) or “Economy 7/10” before switching.
- If you have storage heaters or a night-only hot water setup, switching may remove the benefit of cheap night units.
- Switching tariff is often easy; switching meter configuration (e.g., Economy 7 to single-rate) can involve supplier processes and, occasionally, an appointment.
Quick check (60 seconds)
- Are there two electricity unit rates?
- If yes (day/night), you’re likely on Economy 7/10 or a time-of-use tariff.
- Do you heat your home with storage heaters?
- If yes, be cautious: single-rate can increase costs.
- Do you have an EV or run appliances overnight a lot?
- If yes, compare single-rate vs off-peak options using your actual overnight usage.
Important: If your property has a complex setup (e.g., multiple electricity meters, restricted supply, or a landlord-controlled meter room), switching may be possible but can take longer. In those cases, get advice before you change anything.
Compare single-rate tariffs (whole of market)
If you’re considering moving from Economy 7/10 or a time-of-use plan to a single-rate tariff, the safest approach is to compare using your actual household details (meter type, payment method and region).
What you’ll need
- Your postcode (tariffs vary by region)
- Whether you pay by Direct Debit, cash/cheque or prepayment
- A recent bill (helpful for day/night split if you have it)
Privacy note: We use your details to provide quotes and help you switch. We’ll only contact you about your comparison and next steps.
Get your quote
Share a few details and we’ll show suitable tariffs, including single-rate options where available.
How to decide if single-rate will be cheaper
A single-rate tariff charges one unit rate (p/kWh) for all electricity you use, plus a daily standing charge. Economy 7/10 and other multi-rate tariffs split your use into day and off-peak rates.
Step 1: Find your day/night split
- Bill method: look for two electricity unit rates and two kWh totals.
- Smart meter app: check usage by time of day (if provided).
- Estimate: if you don’t know, use a cautious range (e.g., 10%, 25%, 40% off-peak) and see how your results change.
Step 2: Compare using a simple break-even test
Single-rate is more likely to win when your off-peak share is low. A practical rule of thumb is:
If off-peak usage is under ~25–35%, single-rate often competes well. If it’s higher—especially with storage heating—Economy 7/10 may still be better.
Why it’s a range: the break-even point depends on the gap between your day and night prices and the single-rate price you’re offered. Standing charges also matter.
Two realistic scenarios (with numbers)
These examples use illustrative prices to show how the maths works. Your actual rates will vary by region, supplier, payment method and meter type.
Scenario A: Flat occupant, little night usage (single-rate likely cheaper)
- Annual electricity use: 2,900 kWh
- Off-peak share: 15% (435 kWh night, 2,465 kWh day)
- Economy 7 unit rates: Day 29p, Night 14p
- Single-rate unit rate: 25p
- Standing charge: assumed equal on both (so excluded for clarity)
Economy 7 cost (units only): (2,465×£0.29) + (435×£0.14) = £775.15
Single-rate cost (units only): 2,900×£0.25 = £725.00
Estimated difference: single-rate ~£50/year cheaper (before standing charge differences and any discounts)
If your single-rate standing charge is higher, that could reduce or remove this saving—always compare the full tariff.
Scenario B: Storage heating, high night usage (single-rate may cost more)
- Annual electricity use: 6,800 kWh
- Off-peak share: 55% (3,740 kWh night, 3,060 kWh day)
- Economy 7 unit rates: Day 31p, Night 15p
- Single-rate unit rate: 26p
- Standing charge: assumed equal on both (so excluded for clarity)
Economy 7 cost (units only): (3,060×£0.31) + (3,740×£0.15) = £1,510.60
Single-rate cost (units only): 6,800×£0.26 = £1,768.00
Estimated difference: single-rate ~£257/year more (before standing charge differences and any discounts)
High off-peak use is exactly what Economy 7/10 is designed for—switching to single-rate can remove that advantage.
Tip: If you have an EV, consider comparing single-rate against an EV or off-peak smart tariff. The cheapest option often depends on how many kWh you charge overnight and your ability to shift other usage.
Single-rate vs Economy 7/10 vs time-of-use: quick comparison
Use this table as a decision aid, then confirm with your own prices and usage split.
| Option | Best for | Watch-outs | Typical requirements |
|---|---|---|---|
| Single-rate | Most homes with daytime-heavy use; simpler budgeting | Can be worse for storage heaters or high overnight EV charging | Usually any standard meter; may need meter reconfiguration if currently multi-rate |
| Economy 7 | Homes using lots of electricity at night (storage heating/hot water) | Day rate can be higher; needs lifestyle fit and correct meter times | Two-rate meter (or smart meter set up for multi-rate) |
| Economy 10 | Some electric-heated homes needing off-peak across more hours | Less common; fewer tariff choices; timing windows can vary | Economy 10 capable meter; supplier availability varies by region |
| Smart time-of-use | People who can shift usage (EV, battery, heat pump schedules) | Peak rates can be high; needs attention and compatible smart meter | Smart meter + eligible supplier + sometimes app-based monitoring |
Mobile tip: scroll the table sideways to view all columns.
Single-rate checklist: it likely suits you if…
- You don’t have storage heaters (or they’re rarely used)
- You’re home in the day (or run appliances mostly daytime/evening)
- Your overnight usage is modest (e.g., fridge/freezer only)
- You want a simpler bill with one unit rate
- Your day rate on Economy 7 feels expensive versus available single-rate offers
Single-rate may not suit you if…
- Storage heaters provide most of your heat
- You heat water overnight using an immersion on a timer
- You regularly charge an EV overnight (and can’t/do not want to shift it)
- Your property is on a restricted/complex meter setup (needs checking)
- Your off-peak usage is consistently high (often 40%+)
Costs, exclusions and common pitfalls (UK-specific)
1) Standing charges can change the outcome
Even if the unit rate looks lower, a higher standing charge can reduce savings. Always compare total annual cost (unit rates + standing charge) for your usage.
2) Meter setup may need changing
If you’re currently on Economy 7/10, you may need your supplier to reconfigure the meter (or your billing settings) to single-rate. Timescales and processes vary.
3) Prepayment and PAYG availability differs
Some tariffs are only available for Direct Debit. If you’re on prepayment, options can be narrower (though competition has improved). Check eligibility before deciding.
Exit fees and switching timing
- Fixed tariffs may have exit fees if you leave early.
- Many variable tariffs have no exit fee, but you should still check your terms.
- It’s usually possible to schedule a switch to start when your fixed term ends.
Day/night timings can be different to what you assume
Economy 7 hours vary by region and meter settings. If the cheap period doesn’t match when you actually use power, you may not be benefiting—making single-rate more attractive.
Check: your bill, your meter display, or your supplier account for the off-peak window. If you suspect it’s wrong (e.g., after clocks change), contact your supplier.
Common “gotchas” to avoid
- Comparing the wrong rates: don’t compare Economy 7 night rate to single-rate; compare the full annual cost.
- Assuming storage heating is “just electricity”: storage heaters are designed for off-peak charging—single-rate can materially increase bills.
- Forgetting hot water: if your immersion heater is on an off-peak timer, switching tariff may change its running cost.
- Not updating your Direct Debit: after switching, monitor the first 1–2 bills and adjust your monthly amount if needed.
- Complex meters: some properties have multiple registers or restricted supply arrangements; get advice before changing tariff type.
FAQs
How do I know if I’m on Economy 7?
Check your electricity bill for two unit rates (often labelled day and night), two sets of kWh, or the words Economy 7. Many meters also show separate readings/registers (e.g., R1/R2).
Can I switch from Economy 7 to single-rate without changing my meter?
Sometimes. Some suppliers can bill a multi-rate meter on a single-rate tariff by applying one price across usage, but others require a meter configuration change. If you’re not sure, we recommend quoting with your current setup first, then confirming the supplier’s process before you switch.
Will switching affect my smart meter?
Usually not. A smart meter can work on single-rate or multi-rate tariffs. However, some time-of-use tariffs require specific smart meter compatibility and accurate configuration. If your in-home display doesn’t update immediately after a switch, your supplier may need to refresh settings.
I rent—can I change to a single-rate tariff?
If you pay the bills and your name is on the energy account, you can usually switch supplier and tariff. If bills are included in rent, or the landlord controls the supply, you typically can’t. If your tenancy has specific clauses, check them first.
Does a single-rate tariff work with storage heaters?
It can work, but it’s often more expensive. Storage heaters are designed to “charge” overnight on off-peak electricity. If you move to single-rate, you may lose the cheap overnight benefit. Compare carefully using your night kWh and the full tariff costs.
Will I get the same rates everywhere in the UK?
No. Electricity prices vary by region and can also differ by payment method (e.g., Direct Debit vs prepayment). That’s why postcode is essential for accurate comparisons.
Can I switch if I’m in debt to my supplier?
It depends. Some situations allow switching, but debt rules vary, especially for prepayment meters and debt repayment plans. If you’re unsure, check with your supplier and independent advice. Citizens Advice has guidance on switching with debt.
How long does switching usually take?
Switching supplier is often completed within a few weeks, but timings vary. If a meter configuration change is needed (e.g., moving from a multi-rate setup to single-rate billing), it can take longer and may require additional steps.
Not sure what you’re on? Use our quote form above and select “Not sure” for your current setup. We’ll guide you based on what’s available for your postcode and meter type.
Trust, methodology and sources
Page ownership
- Written by
- EnergyPlus Editorial Team
- Reviewed by
- Energy Specialist
- Last updated
- March 2026
How we assess whether single-rate could be cheaper
We focus on what most affects the outcome for UK households:
- Usage split: proportion of electricity used off-peak vs daytime.
- Rate gap: difference between day and night unit rates, versus the single-rate unit price.
- Standing charges: included in comparisons where users are checking real tariffs (our examples may hold standing charges equal to isolate the unit-rate effect).
- Eligibility constraints: meter type (single vs multi-rate), smart/time-of-use requirements, payment method and region.
Limitations: Tariff availability changes frequently. Supplier rules for converting a multi-rate meter to single-rate can differ. Always confirm the full tariff details (unit rates, standing charge, contract length and exit fees) before switching.
Sources (UK)
- Ofgem (UK energy regulator) — guidance and consumer protections around switching
- Citizens Advice: energy supply and switching — support on switching, bills and disputes
- GOV.UK — broader consumer and cost support information (where relevant)
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