Switch to an energy tariff with free weekend electricity
Free-weekend electricity deals can work well if you can shift usage to Saturdays and Sundays — but the weekday unit rate is often higher. This guide shows how to check if it’s genuinely good value for your home and how to compare safely.
- See when “free weekend” is genuinely cheaper (with worked examples)
- Check eligibility: meter type, payment method, region, and T&Cs
- Compare whole-of-market options and switch with confidence
Estimates only. Availability, rates, and “free hours” vary by supplier, region, meter type and payment method. Always check the tariff information label (TIL) before switching.
Fast answer: are free weekend electricity tariffs worth it?
They can be worth it if you can reliably move a meaningful chunk of your electricity use into the supplier’s “free” weekend window (for example: washing machine, tumble dryer, dishwasher, EV charging, or storage heater top-ups). But many deals compensate with a higher weekday unit rate, a different standing charge, or strict “free hours” rules.
Usually suits
- Homes with high weekend use
- EV drivers who can charge mainly on weekends
- Households that can batch laundry/dishwashing
Often not ideal for
- People home weekdays using electric heating/cooking
- Low users (standing charge dominates)
- Anyone who can’t shift usage to the set window
Check before switching
- Exact “free hours” (start/end times)
- Whether you need a smart meter
- Exit fees and contract length
How “free weekend electricity” tariffs work (UK)
A free-weekend tariff is usually a time-based electricity price where the supplier sets one or more weekend periods to a £0.00/kWh rate (or a heavily discounted rate). Outside that window, you pay the standard unit rate shown on the tariff.
What varies between suppliers
Free window: could be all weekend, specific hours (e.g. Sat/Sun afternoons), or a set number of hours.
Eligibility: may require a smart meter, direct debit, and a fixed term.
Rate structure: weekday unit rate and standing charge may be higher than standard tariffs.
Fuel type: often electricity-only; gas may be on a separate tariff with different terms.
The 4 things to check on the tariff information label (TIL)
- 1) Unit rate(s) in p/kWh
- Confirm the weekday rate and whether the weekend rate is truly 0p/kWh (or discounted).
- 2) Standing charge in p/day
- A higher standing charge can offset “free” energy, especially for low users.
- 3) Exit fees and end date
- If it’s a fixed tariff, check early exit fees and whether prices change at the end of term.
- 4) Conditions for free hours
- Free energy might apply only within a defined time window, and suppliers may reserve the right to change the schedule with notice.
Two realistic scenarios (with numbers)
These are simplified examples to show how free weekend deals can help (or not). Actual prices vary by region, payment method, and tariff.
Scenario A: Weekend shifting household (possible win)
- Annual electricity: 3,200 kWh
- Weekend in free window: 30% (960 kWh)
- Standard tariff: 26p/kWh, standing charge £0.60/day
- Free-weekend tariff: weekdays 30p/kWh, weekends 0p/kWh, standing charge £0.62/day
Standard cost (estimated): (3,200×£0.26) + (365×£0.60) = £832 + £219 = £1,051/year
Free-weekend cost (estimated): (2,240×£0.30) + (960×£0.00) + (365×£0.62) = £672 + £0 + £226 = £898/year
Difference: about £153/year cheaper in this simplified example.
Scenario B: Low weekend usage (often not worth it)
- Annual electricity: 2,700 kWh
- Weekend in free window: 10% (270 kWh)
- Standard tariff: 26p/kWh, standing charge £0.55/day
- Free-weekend tariff: weekdays 31p/kWh, weekends 0p/kWh, standing charge £0.62/day
Standard cost (estimated): (2,700×£0.26) + (365×£0.55) = £702 + £201 = £903/year
Free-weekend cost (estimated): (2,430×£0.31) + (270×£0.00) + (365×£0.62) = £753 + £0 + £226 = £979/year
Difference: about £76/year more expensive in this simplified example.
Compare free-weekend tariffs safely (whole-of-market approach)
To compare properly, treat “free weekend electricity” as a pricing feature — not a guarantee of savings. The right way to assess it is to estimate how much of your kWh you can move into the free window, then compare total annual cost including standing charges and any exit fees.
Step-by-step: what to do before you switch
- Find your annual electricity use (kWh) from a bill, in-home display, or your supplier account.
- Estimate weekend shift potential (e.g. 10%, 20%, 30%) based on appliances you can run on weekends.
- Check your meter type (smart meter / Economy 7 / standard) and whether the tariff requires smart readings.
- Review tariff terms (free hours, standing charge, price cap status, contract length, exit fees).
- Compare total cost against a standard fixed/variable tariff you could take today.
Get a personalised quote
Share a few details and we’ll help you compare suitable tariffs, including deals with time-based or weekend offers (where available).
Free weekend tariffs vs standard tariffs: what to compare
Use this table to sanity-check the offer. The key is the total cost across the week, not the headline “free” message.
| What to check | Free weekend tariff | Standard tariff (fixed/variable) | Why it matters |
|---|---|---|---|
| Weekday unit rate | Often higher | Usually lower than weekend deals | Most homes use most electricity on weekdays. |
| Free window times | Defined hours / whole weekend | Not applicable | If you can’t run appliances in-window, you won’t benefit. |
| Standing charge | Can be higher | Varies | High standing charge hits low users hardest. |
| Smart meter requirement | Often required | Not always required | Time-based billing needs time-stamped readings. |
| Contract & exit fees | Often fixed with fees | Variable may have no fee | Fees matter if you may move home or switch again soon. |
| Payment method | Often direct debit | Direct debit / prepay options vary | Some offers aren’t available on prepayment. |
Decision checklist: is it right for you?
You’re more likely to benefit if…
- You can shift 20%+ of electricity into the free window
- You have high discretionary usage (laundry, dishwashing, EV charging)
- You’re happy with a smart meter (or already have one)
- You’ve checked standing charge and it’s not unusually high
You may be better with a standard tariff if…
- Your home is occupied weekdays and electricity use is steady
- You’re a low user (standing charge is a big share of bills)
- You can’t run appliances during the set weekend hours
- You want maximum flexibility (no exit fees)
Mini calculation (break-even)
If the weekend rate is effectively 0, your break-even “free window” usage share is roughly:
Share needed ˜ (Weekday rate - Standard rate) ÷ Weekday rate
Example: standard 26p, weekday 30p ? (30-26)/30 ˜ 13% (before standing charge differences). This is a guide only.
Costs, exclusions and common pitfalls (UK)
The headline can be appealing, but these are the most common reasons people end up paying more than expected.
1) The “free” hours aren’t the whole weekend
Some tariffs offer a limited window (e.g. a few hours on Saturday and Sunday). If you use electricity outside the window, you pay the higher standard rate.
2) Higher weekday unit rate
This is the biggest trade-off. If you don’t shift enough kWh, you can lose money even though some usage is free.
3) Standing charge differences
A few pence per day adds up over a year. Always include standing charge in your comparison.
4) Smart meter and data requirements
Time-of-use billing usually relies on smart meter readings. Without them, you might not be eligible or billing may default to a different rate structure.
5) Exit fees if you need to switch again
If a better deal appears or you move home, early exit fees can reduce or wipe out any savings.
6) Not checking gas prices (if dual fuel)
If you’re comparing dual fuel, the electricity offer might look great but the gas unit rate or standing charge could be less competitive.
FAQs
Is weekend electricity really free?
It depends on the tariff. Some set the unit rate to 0p/kWh during specific weekend hours; others discount it. You’ll still typically pay a standing charge, and usage outside the window is billed at the normal rate.
Do I need a smart meter for a free weekend tariff?
Often, yes. Time-based pricing generally needs time-stamped readings. Some suppliers may not offer the tariff without a compatible smart meter (or may install one as part of the switch).
Can I get free weekend electricity on a prepayment meter?
Availability is more limited on prepay, and some time-of-use deals are direct debit only. It’s still worth comparing, but expect fewer options and always check eligibility in the tariff terms.
Will my supplier change my “free hours” later?
Tariff terms vary. Some suppliers may reserve the right to amend the free window with notice (for example, to manage demand). Check the contract and keep any emails/terms you’re sent when you switch.
If I switch, how long does it take in the UK?
Many switches complete within a few working days, but timings can vary. Your supply won’t be interrupted. If there are issues (like meter details), it may take longer to resolve.
What if I’m in debt to my current supplier?
You may still be able to switch, but rules and supplier policies vary. If you have a prepayment meter, you might be on a debt repayment arrangement. If you’re struggling, consider support options via Citizens Advice and your supplier’s help schemes.
Does “free weekend electricity” affect the Ofgem price cap?
The price cap applies to certain default and variable tariffs (not all deals). A time-of-use tariff may be structured differently. Either way, you should compare the full tariff rates and standing charge rather than assuming it’s capped in the same way.
Can renters switch to a weekend deal?
Usually yes if your name is on the energy account and you pay the bills. You typically can’t remove the meter. If you might move soon, check for exit fees and how the supplier handles moving home.
Trust, editorial standards and sources
Sources we use
- Ofgem (UK energy regulator) — switching, tariffs and consumer protections
- Citizens Advice: energy — billing, complaints and support if you’re struggling
- GOV.UK: energy guidance — general UK guidance and support schemes
How we assess free weekend tariffs
This page is designed to help you decide if a free-weekend tariff is likely to be cost-effective before you commit.
Assumptions used in our examples
- Electricity usage split into weekday vs weekend “free window” kWh
- Unit rates and standing charges are illustrative and shown in £
- No additional fees/discounts applied (e.g. bundled services)
Limitations (important)
- Real tariffs can include multiple rate periods and regional pricing
- Free windows may change by supplier and can be time-limited offers
- Your actual savings depend on behaviour and accurate meter readings
- Gas prices (if dual fuel) can change the overall best choice
Ready to see if a free-weekend tariff suits your home?
Compare whole-of-market options using your postcode and meter type. We’ll help you check the free hours, the weekday rate, standing charge and any exit fees — so you can switch confidently.
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