Cheapest energy tariff for an electric blanket (UK guide)

An electric blanket is usually cheap to run, so the “cheapest tariff” depends more on your meter type and how you use electricity at home than on the blanket itself. Use this guide to estimate costs, avoid common tariff traps, and compare whole-of-market deals that match your situation.

  • See the best tariff types for overnight blanket use vs evening use
  • Estimate running costs using your unit rate (with worked UK examples)
  • Compare deals by meter, payment method, and exit fees before you switch
Get your personalised energy quote How to choose the right tariff type

Estimates use your electricity unit rate (p/kWh) and typical blanket wattage; prices vary by region, meter type, payment method, and supplier terms.

Fast answer: there isn’t one single “cheapest” tariff for an electric blanket

An electric blanket typically uses 50–150 watts (0.05–0.15 kW). Even with nightly use, it’s a relatively small part of your electricity bill. The cheapest tariff for you depends on:

  • When you use it (overnight vs early evening)
  • Your meter (single-rate vs Economy 7 / multi-rate)
  • Your payment method (Direct Debit vs pay-as-you-go)
  • Your region & supplier terms (standing charge, unit rates, exit fees)

Rule of thumb: If your blanket use is mostly overnight and you already have (or can benefit from) a multi-rate tariff, a time-of-use option may lower the blanket’s cost. If you use it mainly in the evening, a good-value single-rate tariff usually wins because switching to Economy 7 can make daytime electricity more expensive.

Key takeaways

Blanket cost is small

At 100W, 2 hours/day is 0.2kWh/day. The tariff structure matters more than the appliance.

Watch standing charges

A low unit rate can be offset by a higher daily standing charge, especially on low usage homes.

Match your meter

If you’re on Economy 7, compare like-for-like (day/night rates) and confirm your night hours.

Compare tariffs that fit how you use electricity

If you’re only looking to reduce the cost of running an electric blanket, the savings might be modest. Most households benefit more from choosing the best overall tariff for their whole home use (heating, cooking, showers, appliances) and then the blanket cost takes care of itself.

What we’ll match you on

  • Meter type: single-rate, Economy 7 / multi-rate, smart meter where available
  • Payment method: typically Direct Debit tariffs are lower than pay-as-you-go
  • Tariff features: fixed vs variable, exit fees, green options, contract length
  • UK region: rates and standing charges vary by distribution area

Tip: If you have an Economy 7 meter but don’t use much electricity overnight beyond an electric blanket, it’s worth checking whether a single-rate tariff would be cheaper overall.

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Before you switch: check for exit fees, whether your current supplier has a fixed-term contract, and whether your meter supports the tariff type you want (single-rate vs multi-rate).

How to choose the cheapest tariff type for electric blanket use

If you use the blanket overnight

  • Check if you’re on Economy 7 / multi-rate (or if you can switch).
  • Confirm the off-peak hours in your area (they can vary).
  • Make sure other usage also fits (e.g., dishwasher, washing machine, EV charging).

If you use the blanket in the evening

  • A competitive single-rate tariff is usually simplest.
  • Economy 7 can raise your day rate, which may outweigh blanket savings.
  • Compare the standing charge as well as unit rate.

Quick cost formula: Cost ≈ (Blanket watts ÷ 1000) × hours used × unit rate (in £/kWh). Standing charge applies regardless of blanket use.

Tariff types compared (UK): what’s usually cheapest for an electric blanket?

Use this as a decision aid, then compare live prices for your postcode. “Cheapest” can change based on your region, whether you pay by Direct Debit, and the exact day/night rates offered.

Tariff type When it can be cheapest Watch-outs Who it suits
Single-rate (standard) Blanket mainly used evenings or short bursts; most home usage is daytime/evening. Compare standing charge; fixed deals may have exit fees. Most households; renters who want simplicity.
Economy 7 / multi-rate Blanket + other loads used overnight (e.g., storage heating, hot water, EV, appliances). Day rate is often higher. Off-peak hours vary by region/meter settings. Homes with meaningful overnight usage; some all-electric properties.
Time-of-use (smart tariffs) You can shift use into cheaper windows (often overnight). Blanket costs may drop a little. Rates can vary by time/day; may need a compatible smart meter. Tech-comfortable users; people who can flex usage.
Variable (SVT or variable deal) Sometimes the simplest short-term option if you may move soon or don’t want exit fees. Price can change; SVT prices are influenced by the Ofgem price cap (where applicable). People needing flexibility; those waiting for a better fix.

Decision checklist (fast)

1) When do you use the blanket most?
Overnight use points towards multi-rate/time-of-use; evening use points towards a strong single-rate.
2) What meter do you have?
Single-rate and Economy 7 are not interchangeable without checking your meter setup.
3) How stable is your situation?
If you may move soon, exit fees on fixed tariffs may matter more than small unit-rate differences.

Who this approach suits (and who it doesn’t)

Suits you if:

  • You want the best overall home tariff, not a “gadget-specific” deal.
  • You can estimate when you use electricity (day vs night).
  • You’re happy to compare standing charges, unit rates, and exit fees.

May not suit you if:

  • You’re on a complex legacy meter and can’t confirm rates/hours.
  • You’re in temporary accommodation and can’t change supplier.
  • You’re only trying to reduce a very small usage item (blanket only).

Electric blanket costs, exclusions, and common pitfalls

Below are realistic estimates and the things that most often cause people to pick the wrong tariff for their situation.

Scenario 1: evening pre-heat on a single-rate tariff

Assumptions (example): 100W blanket, used 2 hours/day for 5 months (150 days). Single-rate unit price 28p/kWh (0.28). Standing charge excluded because you pay it either way.

  • Energy per day: 0.1kW × 2h = 0.2kWh
  • Cost per day: 0.2kWh × £0.28 = £0.056 (5.6p)
  • Season cost (150 days): £0.056 × 150 = £8.40

If your blanket is 150W or used longer, costs rise proportionally. Always check the label/manual for wattage.

Scenario 2: overnight use on Economy 7 (night rate)

Assumptions (example): 100W blanket, 8 hours/night for 5 months (150 nights). Night unit price 14p/kWh (£0.14). Blanket hours fully within off-peak window (this must be checked).

  • Energy per night: 0.1kW × 8h = 0.8kWh
  • Cost per night: 0.8kWh × £0.14 = £0.112 (11.2p)
  • Season cost (150 nights): £0.112 × 150 = £16.80

Economy 7 can still be a poor fit if your day rate is much higher and most of your household usage is daytime/evening.

Pitfalls to avoid when chasing the “cheapest” tariff

1) Ignoring standing charge

Standing charges are daily and apply regardless of blanket usage. If your overall usage is low, a higher standing charge can outweigh a lower unit rate.

2) Switching to Economy 7 for one small device

If you only use off-peak for an electric blanket, the higher day rate may cost more across the rest of your home.

3) Not checking your off-peak hours

Economy 7 times vary by area and meter setup. If your blanket use falls outside off-peak, it will be charged at the day rate.

4) Overlooking exit fees

Fixed tariffs can include exit fees. If you may switch again soon, fees could wipe out any tariff advantage.

Safety note (non-tariff): Always follow the manufacturer’s guidance, don’t use a damaged blanket, and avoid using with certain medical devices unless the manufacturer/clinician advises it’s safe. This page covers energy costs and tariffs, not product safety certification.

FAQs: cheapest tariff for an electric blanket (UK)

Is there a specific “electric blanket tariff” in the UK?

No. Electric blankets use standard electricity and are billed at your normal unit rate(s). The best approach is to choose the cheapest suitable tariff for your home overall, then estimate the blanket’s running cost using your unit rate.

Is Economy 7 always cheaper for an electric blanket?

Not always. Economy 7 can make overnight electricity cheaper, but the day rate is often higher. If you don’t have meaningful off-peak usage beyond an electric blanket, you can end up paying more overall.

How can I estimate my electric blanket cost on my tariff?

Use: (watts ÷ 1000) × hours × unit rate. Example: 100W for 2 hours at 28p/kWh → 0.1 × 2 × £0.28 = £0.056 (5.6p). If you’re on Economy 7, use the night rate only for hours that fall within your off-peak window.

Do smart meters make electric blankets cheaper to run?

A smart meter doesn’t automatically reduce costs. It can enable certain smart/time-of-use tariffs and helps you see when you’re using electricity. Whether it’s cheaper depends on the tariff’s unit rates and when you use electricity.

Will switching supplier affect my electricity quality or safety?

No. In Great Britain, the electricity supply and safety standards don’t change when you switch supplier—your local network still delivers the power. What changes is your tariff, billing, and customer service.

Can renters switch energy tariffs?

Usually yes, if you pay the bills and your agreement allows it. If bills are included in rent or the landlord controls the supply contract, you may not be able to switch. Always check your tenancy agreement first.

Are pay-as-you-go (prepayment) tariffs more expensive?

They can be, but it varies. In general, Direct Debit deals often have lower rates, but eligibility and availability depend on supplier and credit checks. If you’re on prepayment, compare tariffs available for your meter type and consider whether switching payment method is realistic for you.

What details do I need to compare tariffs accurately?

Ideally: your postcode, whether you have gas too, your meter type (single-rate/Economy 7/smart), payment method, and an idea of annual usage (kWh) from a recent bill. If you don’t have usage, you can still compare, but accuracy improves with kWh figures.

How we assess “cheapest” for electric blanket tariffs

Our approach

  • We treat an electric blanket as a small electrical load, then focus on which tariff structures typically reduce costs without increasing other household costs.
  • We prioritise whole-bill impact: unit rates + standing charges + exit fees + eligibility.
  • We use simple, checkable maths so you can recreate the estimate from your bill.

Assumptions used in examples

  • Typical blanket power: 50–150W (check your model).
  • Example unit rates shown are illustrative only and may not reflect current prices in your region.
  • Economy 7 examples assume usage falls entirely within off-peak hours (this varies by meter/region).

Limitations & caveats

  • We can’t guarantee a tariff is available to all customers; credit checks and meter compatibility may apply.
  • Tariffs can change and may be withdrawn; always review your tariff information label and contract terms.
  • The Ofgem price cap (where applicable) affects default tariffs but does not mean all tariffs cost the same.

Editorial trust signals

Sources (UK)

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Updated on 27 Apr 2026