Cheapest tariff for an electric blanket in the UK
Electric blankets are low‑power, but the cheapest tariff for running one depends on your meter, payment method, region and when you use it. This guide shows how to estimate costs and find a suitable UK tariff without guesswork.
- Estimated running costs using realistic wattages and UK unit rates
- Which tariff types suit blanket use (single‑rate, Economy 7, tracker, fixed)
- A quick way to compare whole‑of‑market options for your postcode and meter
Estimates only. Your costs depend on your blanket’s wattage, thermostat cycling, your tariff rates and standing charge, and when you use it.
Fast answer: the “cheapest tariff” is usually the one with the lowest unit rate for when you use it
For most UK homes running an electric blanket in the evening and overnight, the cheapest option is typically:
If you have a standard meter
A competitive single‑rate tariff (fixed or tracker) with a low unit rate, plus a standing charge that’s reasonable for your region.
If you have Economy 7 (E7)
A tariff with a strong off‑peak rate if you can run the blanket mainly during off‑peak hours. Otherwise, E7 can cost more overall.
If you’re on prepay
The “cheapest” may be limited—compare prepayment‑compatible tariffs, and check eligibility for credit meters if you want more choice.
Typical blanket cost (estimate)
A common blanket might average 50–100W once warmed up (thermostat cycling varies). Used for 8 hours/night, that’s roughly:
- 0.4–0.8 kWh per night
- At 30p/kWh: about 12p–24p per night
- Over 30 nights: about £3.60–£7.20 per month
What changes the answer
- Meter type (standard vs Economy 7/10, smart meter, prepay)
- When you use it (off‑peak vs peak hours)
- Payment method (Direct Debit, cash/cheque, prepayment)
- Your region (standing charge and unit rate vary by area)
- Exit fees and fixed-term end dates
Compare whole‑of‑market tariffs for your postcode (recommended)
If your goal is “cheapest for an electric blanket”, the most reliable approach is to compare tariffs based on your actual meter type and overall electricity usage. You can still choose to prioritise tariffs with cheaper night rates if you use the blanket mostly overnight.
What you’ll need
- Postcode (to match regional network charges)
- Payment preference (Direct Debit / prepay)
- Your meter type (standard or Economy 7)
- Optional: recent kWh use from a bill
What we’ll show
- Estimated annual cost (unit rate + standing charge)
- Fixed vs variable options (where available)
- Key terms: contract length, exit fees, eligibility
- Any day/night rates if you’re on Economy 7
Get a personalised tariff shortlist
Share a few details and we’ll match you to suitable UK home energy tariffs. No obligation—your results depend on availability, eligibility and your meter.
How to calculate the cost of running an electric blanket (UK)
You only need two numbers: wattage and your electricity unit rate (p/kWh). If your blanket cycles on/off with a thermostat, use an average wattage rather than the maximum.
1) Convert watts to kW
kW = watts ÷ 1000
Example: 100W → 0.1kW
2) Multiply by hours used
kWh = kW × hours
0.1kW × 8h = 0.8kWh
3) Multiply by unit rate
Cost = kWh × price per kWh
0.8kWh × 30p = 24p
Scenario 1 (standard tariff, evening use)
Assumptions (example only): blanket averages 80W; used 6 hours/night; unit rate 28p/kWh; 30 nights.
- Nightly kWh
- 0.08kW × 6h = 0.48kWh
- Nightly cost
- 0.48 × 28p = 13.44p
- Monthly cost
- 13.44p × 30 ≈ £4.03
Scenario 2 (Economy 7, mostly off‑peak)
Assumptions (example only): blanket averages 100W; used 8 hours/night; off‑peak rate 16p/kWh; 30 nights.
- Nightly kWh
- 0.1kW × 8h = 0.8kWh
- Nightly cost
- 0.8 × 16p = 12.8p
- Monthly cost
- 12.8p × 30 ≈ £3.84
If those 8 hours spill into the day rate, the cost could rise quickly. Always check your off‑peak hours (they vary by meter and region).
Tariff types: which is “cheapest” for electric blanket use?
Below is how common UK tariff types usually play out for electric blanket usage. The right answer depends on your wider household consumption pattern, not the blanket alone.
Fixed single‑rate (standard meter)
Often suits: most households that use electricity mainly mornings/evenings.
- Predictable unit rate for the term
- May include exit fees (check before switching again)
- Blanket cost depends on that single rate
Variable / SVT (standard variable tariff)
Often suits: short-term flexibility or when you don’t want a contract.
- Can change (often with wider market movements)
- Usually no exit fee
- May not be the cheapest for many households
Economy 7 (day/night)
Often suits: people who can shift a meaningful share of use overnight.
- Electric blanket can benefit if used off‑peak
- Day rate is often higher than single‑rate
- Best when you also run other loads overnight (e.g. storage heating)
Tracker (price can change frequently)
Often suits: people who accept price variability and understand the terms.
- Can be cheaper or more expensive depending on market conditions
- May have eligibility criteria and/or exit fees
- Blanket savings are limited because usage is small
Quick comparison: choosing a tariff if your main concern is night-time comfort
This table helps you decide what to prioritise. Exact prices vary by supplier, region and payment method, so use it as a decision tool rather than a price list.
| Tariff type | When it can be cheapest for blanket use | Main watch-outs | Best for |
|---|---|---|---|
| Single‑rate fixed | If your overall unit rate is low and you mainly use the blanket evenings/bedtime. | Exit fees; check contract end date and any switching restrictions. | Most households on a standard meter. |
| Single‑rate variable (SVT) | When flexibility is more important than price certainty. | Rates can change; may not be cheapest over time. | Short-term renters or anyone planning to switch soon. |
| Economy 7 | If blanket use is mostly within off‑peak hours and you can shift other usage overnight too. | Day rate can be higher; off‑peak times vary; not ideal if most usage is daytime. | Homes with storage heating or overnight EV charging. |
| Tracker | Potentially when market rates are low and the tracker rules suit you. | Price volatility; may not suit tight budgets; check caps, updates and exit fees. | Confident switchers who monitor prices. |
Decision checklist (quick)
- Do you know your meter type? (standard vs Economy 7 vs prepay)
- When do you use most electricity? daytime vs evening vs overnight
- Are you currently in a fixed deal? check end date and exit fees
- Is your goal price certainty? fixed may suit; trackers vary
- Will the blanket be a main load? usually no—compare using whole-home usage
Who this approach suits / doesn’t suit
Suits you if:
- You want an evidence-based estimate
- You’re happy to compare on total bill impact
- You can confirm meter type and payment method
May not suit if:
- You need medical or safety advice (speak to a professional)
- You cannot change supplier (some tenancy situations)
- You only want to optimise a tiny load and ignore the rest of the bill
Costs, exclusions and common pitfalls (UK)
When people search for the cheapest tariff for an electric blanket, they often focus only on p/kWh. These are the UK-specific details that can change what’s “cheapest” in practice.
Standing charge can dominate
If you use relatively little electricity, a tariff with a slightly higher unit rate but lower standing charge could be cheaper overall. Compare total estimated annual cost.
Economy 7 timing varies
Off‑peak hours aren’t universal. They depend on your meter setup and region. If your blanket use sits outside off‑peak, you may pay the higher day rate.
Prepay can limit choice
Not all tariffs are available on prepayment meters, and prices/terms can differ. If you want wider choice, ask your supplier about moving to credit (eligibility applies).
Exit fees and fixed end dates
Leaving a fixed tariff early can cost more than you’d save on a small load like a blanket. Check your tariff information label and account terms.
“Low headline rate” tariffs
Some tariffs may look cheap on unit rate but have higher standing charges, specific eligibility rules, or require a smart meter. Always read the key features.
Blanket wattage isn’t constant
Packaging often shows maximum wattage. Real usage depends on heat settings, room temperature, bedding, and auto shut‑off. Use an average for estimates.
FAQs: cheapest tariff for an electric blanket (UK)
Is it worth switching tariff just for an electric blanket?
Usually, no. Electric blankets tend to use relatively little electricity. Switching can still be worthwhile, but base your decision on whole-home usage and the total estimated bill (standing charge + unit rates).
Do night tariffs always make electric blankets cheaper?
Only if your blanket use falls within the off‑peak window and your overall electricity use doesn’t get pushed into a higher day rate. Economy 7 can be great for overnight-heavy households, but not for everyone.
How do I know if I’m on Economy 7?
Check your electricity bill for two unit rates (day and night) or “Rate 1/Rate 2”. Some meters show two readings. Your online account may also list “Economy 7”. If unsure, ask your supplier.
Does a smart meter change which tariffs I can get?
It can. Some tariffs require a smart meter, and some time‑of‑use tariffs depend on half‑hourly readings (with your agreement). Availability varies by supplier and region.
What unit rate should I use in my calculation?
Use the unit rate on your tariff (p/kWh). If you’re on Economy 7, use night rate for off‑peak hours and day rate for everything else. If your blanket use spans both, split the hours.
Do tenants have to stay with the landlord’s supplier?
In many cases, tenants can choose their energy supplier, but your tenancy agreement may include conditions (for example, returning to the original supplier at the end). If you have a prepay meter or bills included, switching may not be possible.
Could an exit fee outweigh any savings?
Yes. Because an electric blanket is typically a small load, an exit fee could outweigh the benefit of a slightly lower unit rate. Check your current tariff’s end date and any exit fees before switching.
Does turning the blanket on to pre‑warm save money?
Often, yes—using it to pre‑warm for a limited time can reduce hours used. The comfort and cost balance is personal, and many blankets have timers or auto shut‑off. Your tariff still determines the p/kWh cost.
Trust, methodology and sources
How we assess “cheapest tariff for an electric blanket”
We treat this as a tariff selection problem, not a single-appliance problem. Because electric blankets typically contribute a small share of annual electricity use, we prioritise tariffs that minimise estimated total household electricity cost while considering meter type, payment method, regional charges, and key tariff terms.
Assumptions used in our examples
- Blanket power shown as an average (e.g. 80–100W), recognising thermostats cycle
- Usage patterns: 6–8 hours/night for illustration
- Electricity unit rates are illustrative (your tariff may be higher/lower)
- We do not include standing charge in blanket-only cost calculations
Limitations and caveats
- Tariff availability varies by postcode/region and supplier eligibility
- Economy 7 off‑peak periods vary; always confirm your hours
- Some tariffs require a smart meter or specific payment method
- Exit fees and contract terms can change the true “cheapest” outcome
Sources (UK)
- Ofgem: Energy price cap information
- Citizens Advice: Energy supply and switching guidance
- GOV.UK: Energy grants and support (where relevant)
We also use supplier tariff information labels and consumer-facing tariff terms when assessing eligibility, exit fees, and payment method constraints.
Ready to find the cheapest tariff for your home?
Compare whole‑of‑market UK home energy tariffs using your postcode and meter type—then choose what fits your routine (including night-time electric blanket use).
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