Cheapest electricity tariff for an electric blanket (UK guide)

Electric blankets are usually cheap to run — so the “cheapest tariff” depends more on your meter type, payment method, region and whether you can shift use into off‑peak hours. This guide shows how to work it out, with realistic costs and a simple quote form.

  • Estimated electric blanket running costs using typical wattages and UK unit rates
  • When Economy 7 / off‑peak can help (and when it won’t)
  • Whole‑of‑market comparison options for your postcode and meter type
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Estimates only. Your costs depend on blanket wattage, usage hours, your tariff unit rate/standing charge, meter type and region.

Fast answer: what’s the cheapest electricity tariff for an electric blanket in the UK?

For most households, an electric blanket uses so little energy that the cheapest option is usually the overall cheapest electricity tariff you can get for your meter and payment method — not a special “electric blanket tariff”.

Rule of thumb: If you use an electric blanket mainly overnight, it may be cheaper on Economy 7 (or another off‑peak tariff) — but only if enough of your total electricity use shifts into the cheaper hours. If you’re mostly daytime usage, a single‑rate tariff is often better.

Key takeaways (UK-specific)

  • Meter type matters: Standard single‑rate, Economy 7, smart meters, and prepayment meters can access different tariffs.
  • Region matters: Unit rates and standing charges vary by electricity distribution region (and by supplier).
  • Standing charge can outweigh savings: Because blanket usage is small, picking a tariff solely for a slightly lower unit rate may not help if standing charge is higher.
  • Safety & comfort first: Use timer/heat settings to avoid overheating and reduce costs; follow manufacturer guidance.

Quick running cost example

A 100W blanket used for 2 hours uses 0.2 kWh. At an example 25p/kWh, that’s about 5p per night (plus your normal standing charge for the supply, which you pay regardless).

Compare electricity tariffs for your home (whole of market)

If you’re looking for the cheapest tariff for running an electric blanket, the practical approach is to compare your eligible tariffs for your postcode, payment method, and meter type, then check whether an off‑peak option would meaningfully reduce your costs.

Tip: If you have (or can get) a smart meter, you may have access to more tariff options (including time‑of‑use). Availability varies by supplier and region.

What you’ll need (2 minutes)

  • Your postcode (sets your electricity region)
  • Whether you pay by Direct Debit, prepayment, or on receipt of bill
  • Your meter type (single rate / Economy 7 / smart)
  • Optional: approximate annual kWh from a bill (helps accuracy)

Electric blanket cost calculator (simple)

Formula: Cost per night ≈ (Watts ÷ 1000) × Hours × Unit rate

Typical blanket power
50W–200W (check the label/manual)
Typical use
30 mins pre‑heat to 8 hours on low
Your tariff rate
Look at p/kWh on your bill/app (day/night if Economy 7)

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We’ll use your details to show suitable home electricity deals and help you understand whether single‑rate or off‑peak could be best for your usage.

Start your comparison

By submitting, you confirm this is for a UK home energy comparison. We’ll use your details to provide quotes and contact you about your comparison. You can opt out at any time.

Prefer to self-check? Look for “unit rate (p/kWh)” and “standing charge (p/day)” on your bill. For Economy 7, check both day and night rates and confirm the off‑peak hours for your meter.

How to choose the cheapest tariff for electric blanket use

Because an electric blanket is a relatively low‑energy appliance, the best tariff choice is usually the one that reduces your overall electricity cost. Use these steps to decide whether a standard single‑rate tariff or an off‑peak tariff could make sense.

  1. Check your meter & current tariff type. If you have a single‑rate meter, you typically can’t use Economy 7 rates without changing meter configuration (supplier rules vary).
  2. Estimate your blanket’s kWh. Use the wattage on the label/manual and your typical hours (see scenarios below).
  3. Compare day vs night rates (if relevant). Economy 7 often has a cheaper night rate but a higher day rate and/or standing charge. If most of your electricity use is daytime, you can pay more overall.
  4. Check payment method restrictions. Some of the lowest prices are typically for Direct Debit. Prepayment and pay-on-receipt can have different pricing and fewer tariff choices.
  5. Watch for exit fees and fixed-term conditions. A cheap unit rate can be offset by fees if you need to switch again before the term ends.

Scenario 1: Single‑rate tariff (typical evening use)

Assumptions (example only): 120W blanket, 2 hours per night, 30 days/month, single rate 25p/kWh.

  • Energy per night: 0.12kW × 2h = 0.24 kWh
  • Cost per night: 0.24 × £0.25 = £0.06
  • Monthly cost: £0.06 × 30 = ~£1.80

Standing charge not included (you’d pay it anyway to have electricity supply).

Scenario 2: Economy 7 (overnight use on low)

Assumptions (example only): 100W blanket, 7 hours overnight, 30 nights/month, night rate 14p/kWh (and you’re actually using it during off‑peak hours).

  • Energy per night: 0.10kW × 7h = 0.70 kWh
  • Cost per night: 0.70 × £0.14 = £0.098 (~10p)
  • Monthly cost: 10p × 30 = ~£3.00

Economy 7 can still cost more overall if your daytime rate is higher and most usage is daytime.

Important: Economy 7 off‑peak times vary by region and meter set‑up (and can shift around daylight saving time). Always confirm your actual off‑peak hours with your supplier or meter information before assuming night‑rate costs.

Tariff types compared (for electric blanket use)

Use this table to narrow down what to compare. Prices vary by supplier, region, meter type and payment method, so treat this as a decision aid — not a promise of availability.

Tariff type When it can be cheapest Main trade-offs Best for electric blanket?
Single‑rate (standard) Most homes with mainly daytime/evening use; simplest comparison. No discounted night rate for overnight appliances. Often best if blanket use is occasional or mostly pre‑heat.
Economy 7 (day/night) If you can reliably use more electricity overnight (not just the blanket). Day rate is commonly higher; standing charge may be higher; off‑peak hours vary. Can help if used overnight and you shift other loads too.
Time‑of‑use (smart meter) If you can align usage to cheaper time bands (varies by tariff). Rates can vary by time/day; may be complex; not available everywhere. Potentially, but blanket alone rarely justifies the complexity.
Prepayment tariffs If you prefer pay‑as‑you‑go and can access competitive prepay options. Tariff choice may be narrower; topping up convenience differs by supplier. Focus on overall cheapest eligible prepay tariff; blanket use is minor.

Decision checklist: likely suits you if…

  • You know your meter type (or can find out) and can compare like-for-like tariffs.
  • You can use the blanket mostly within off‑peak hours (for Economy 7/time‑of‑use).
  • You’re happy to consider total bill impact (standing charge + unit rates), not just one appliance.
  • You can avoid exit fees (or pick a tariff without them) if flexibility matters.

Probably not worth changing tariff just for a blanket if…

  • Your blanket is used briefly (e.g. 30–60 minutes pre‑heat) or only occasionally.
  • Most household electricity use is daytime, so Economy 7’s higher day rate could outweigh the night saving.
  • You’d need a meter change or tariff switch that adds fees/complexity with little benefit.
  • You’re renting and can’t easily change meter arrangements (check with landlord/supplier).

Practical takeaway: If your goal is purely to reduce the cost of using an electric blanket, start by checking your current unit rate and how many hours you use it. Often, optimising usage settings (timer/heat level) makes as much difference as tariff tweaks.

Costs, exclusions and common pitfalls (UK)

These are the issues that most commonly trip people up when trying to find the “cheapest tariff” for a single appliance.

1) Standing charge dominates small usage

If you only use small amounts of electricity for the blanket, a tariff with a slightly lower unit rate may not reduce your bill if the standing charge is higher. Compare total cost, not just p/kWh.

2) Economy 7 isn’t automatically cheaper

Economy 7 can be great for overnight loads, but the day rate is often higher. If your wider household usage stays daytime, you can pay more overall even if the blanket is cheaper overnight.

3) Off‑peak hours can differ

Off‑peak windows depend on region, meter configuration and supplier. Don’t assume the same hours as a neighbour. Confirm with your supplier before relying on night‑rate savings.

4) Wattage isn’t constant on thermostatic blankets

Many blankets cycle power to maintain temperature. That means actual consumption may be lower than “watts × hours”. Our examples assume steady average usage for clarity.

5) Eligibility rules can exclude you from a tariff

Your available deals may depend on payment method, meter type, credit checks, smart meter requirements and whether you’re in debt to a supplier. Always read tariff terms before switching.

Comfort & safety note: Choose the lowest comfortable setting and use timers/auto‑off if available. Follow the manufacturer’s care instructions; older or damaged blankets should be checked/replaced.

FAQs: electric blankets and cheap electricity tariffs (UK)

Is there a special tariff just for electric blankets?

No. In the UK, tariffs are for your home’s overall electricity supply. The best approach is choosing the cheapest tariff you’re eligible for and, if relevant, using off‑peak rates (Economy 7/time‑of‑use) for overnight use.

How much does an electric blanket cost to run per hour?

Estimate: (Watts ÷ 1000) × unit rate. For example, a 100W blanket is 0.1kWh per hour. At 25p/kWh, that’s about 2.5p per hour. Thermostats can reduce average consumption.

Will Economy 7 always be cheaper for overnight blanket use?

Not always. Your blanket might be cheaper overnight, but if your daytime electricity is charged at a higher rate (and most of your usage is daytime), your total bill can increase. Compare total annual cost using your usage split if possible.

Do off‑peak hours change with British Summer Time?

They can. Some meters effectively shift by an hour, depending on set‑up. If you’re relying on night rates, confirm your actual switching times with your supplier or meter information.

Does a smart meter get me cheaper electricity automatically?

No. A smart meter can make it easier to access certain tariffs (including some time‑of‑use deals) and to track usage, but pricing still depends on the supplier and tariff terms.

If I’m on prepayment, can I still find a cheaper deal?

Often yes, but options can be more limited. Prices vary by region and supplier and may depend on whether you have a smart prepay meter. Compare prepayment tariffs specifically and check any switching requirements.

Should I switch tariffs just for winter months?

Be cautious. Fixed tariffs may have exit fees and terms. If your electric blanket is your only “extra” winter usage, it may not justify a tariff change by itself. Compare the total annual cost and check fee-free options if you want flexibility.

What’s the simplest way to reduce costs without switching tariff?

Use a lower heat setting, pre‑warm the bed (e.g. 30–60 minutes) rather than running all night if comfortable, and use built‑in timers/auto‑off. Small changes in hours used can be bigger than small differences in unit rate.

Trust, methodology and sources

Page governance

Reviewed by
Energy Specialist
Last updated
April 2026

How we assess “cheapest” for electric blanket use

We treat “cheapest electricity tariff for an electric blanket” as a household tariff decision, because electric blanket consumption is typically small compared with total electricity use. Our guidance prioritises: (1) eligibility by meter type/payment method, (2) total bill impact (unit rate + standing charge), and (3) whether off‑peak rates match your usage pattern.

  • Electric blanket wattage range: we reference common UK consumer blanket power ranges (often 50W–200W), but you should use the rating on your model.
  • Cost examples: we use simple kWh maths (kW × hours) with example unit rates to illustrate order-of-magnitude costs.
  • Off‑peak assumptions: Economy 7 examples assume the blanket is used during the meter’s off‑peak window; this can vary by region/meter and may shift around daylight saving time.
  • Limitations: thermostatic blankets don’t draw full wattage continuously, suppliers price differently by region, and tariff availability changes. Always validate costs using your actual tariff rates and usage.

Sources (UK)

We link to these sources for consumer guidance and regulatory context. Tariff prices are set by suppliers and vary over time.

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Updated on 29 Apr 2026