What is the cheapest UK Economy 10 tariff this month?

Economy 10 (E10) is niche, regional, and often only offered by a few suppliers. This guide explains how to find the cheapest option for your meter and usage—plus the pitfalls that can make an apparent “cheap” E10 deal cost more.

  • See what “cheapest” really means for Economy 10 (unit rates + standing charge + day/night split)
  • Check if you’re eligible (meter type, region, timings, and supplier availability)
  • Get a whole-of-market quote with a trust-led, no-pressure form
Get your Economy 10 quote How we assess “cheapest”

Estimates only. Economy 10 availability and timings vary by region, meter setup and supplier. Always check your meter’s switching times and the supplier’s tariff rules before you switch.

Fast answer: the cheapest Economy 10 tariff is personal to your meter & usage

There isn’t one universal “cheapest UK Economy 10 tariff” because Economy 10 prices and availability depend on where you live, your payment method, your meter configuration (including whether you have a legacy E10 setup), and how much electricity you use in the off-peak windows.

What “cheapest” usually means

  • Lowest estimated annual cost for your usage (day + off-peak) and region
  • Not just the lowest off-peak unit rate—standing charge and day rate matter
  • Includes any discounts only if they’re clear, ongoing and available to new customers

The quickest way to find your best option

  1. Confirm you’re on Economy 10 (or have an E10-capable meter/times)
  2. Estimate your off-peak share (common in storage-heated homes)
  3. Compare whole-of-market quotes using your postcode and meter type

Important: Economy 10 hours are not the same everywhere. Your off-peak periods are set by your meter setup and local network arrangements—not your supplier’s marketing. Always verify the actual switching times used for billing.

Compare Economy 10 tariffs (whole-of-market)

Tell us a bit about your home and we’ll match you with available tariffs for your meter type. We focus on clarity (rates, standing charges, exit fees) and fit (E10 suitability), not hype.

Tip: If you’re not sure you’re on Economy 10, check a recent electricity bill for two (or more) unit rates and labels like “day/normal” and “night/low”. Some E10 meters show multiple registers (e.g., Rate 1/Rate 2/Rate 3).

What happens after you request a quote

  1. We check tariff availability for your postcode and meter setup.
  2. We show estimated costs based on your day/off-peak split and payment preference.
  3. You choose whether to proceed—no obligation.

Get your Economy 10 quote

We’ll use your details to find relevant tariffs and contact you with your results.

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.

Economy 10 vs alternatives: what to compare before you switch

Economy 10 can be brilliant for storage heating and hot water if you can use a lot of electricity in the off-peak windows. But for some homes, an Economy 7 tariff or a single-rate tariff can be cheaper overall—especially if your daytime usage is high.

Option Best for Main risk What to check
Economy 10 (multi-rate) Storage heaters / immersion; you can shift a large share off-peak High day rate can outweigh cheap off-peak if you use lots in peak hours Your exact off-peak times, number of registers, supplier support for E10
Economy 7 (day/night) Overnight-heavy usage; simpler two-rate setup If your usage is mostly daytime, you may pay more than single-rate Night hours in your region, whether heating controls align with cheap period
Single-rate (flat unit rate) Homes without storage heating; consistent usage across the day You lose access to cheaper off-peak if you could shift load Meter change needs, any wiring/controls tied to off-peak supply

Quick checklist: Economy 10 suits you if…

  • You have storage heaters and/or an immersion heater
  • You can reliably use 40–60%+ of electricity in off-peak periods
  • You can run high-load appliances (washer/dishwasher) in off-peak windows
  • You understand your meter’s registers and can provide readings correctly

Economy 10 may not suit you if…

  • Your home is occupied all day (daytime cooking/working from home) and off-peak share is low
  • Your supplier choices are limited in your region for E10
  • You’re in a rental where meter changes/rewiring aren’t possible
  • You have (or plan) EV charging and want a dedicated smart EV tariff instead

Costs, exclusions and common Economy 10 pitfalls

The biggest Economy 10 mistakes happen when a tariff looks cheap on the off-peak unit rate, but the overall setup doesn’t match your home. Use the checks below before switching.

1) Off-peak timings aren’t “standard”

E10 often splits hours across day/afternoon/night. The exact pattern can vary by region and meter. If your heating/hot water charging doesn’t align, you won’t get the benefit.

2) Day rate can be significantly higher

Some multi-rate tariffs price daytime usage higher than single-rate alternatives. If your off-peak share is low, your annual cost can increase.

3) Meter compatibility limits supplier choice

Not all suppliers support all legacy E10 meter setups. Sometimes an Economy 7 or single-rate tariff is easier to maintain—especially if you’re moving to smart metering.

Example scenario 1: storage-heated flat (E10 works well)

Assumptions (illustrative only):

  • Annual electricity use: 4,200 kWh
  • Off-peak share: 60% (2,520 kWh) due to storage heating + immersion
  • Tariff A (Economy 10): day 30p/kWh, off-peak 14p/kWh, standing charge 55p/day
  • Tariff B (single-rate): 25p/kWh, standing charge 55p/day

Estimated annual cost:

  • Tariff A: (1,680×£0.30) + (2,520×£0.14) + (365×£0.55) ˜ £1,058
  • Tariff B: (4,200×£0.25) + (365×£0.55) ˜ £1,251

Why E10 can win here: a high proportion of usage is genuinely off-peak, so the cheaper rate outweighs the higher day rate.

Example scenario 2: family home, high daytime use (E10 can cost more)

Assumptions (illustrative only):

  • Annual electricity use: 3,600 kWh
  • Off-peak share: 25% (900 kWh) due to daytime cooking/WFH
  • Tariff A (Economy 10): day 32p/kWh, off-peak 15p/kWh, standing charge 55p/day
  • Tariff B (single-rate): 25p/kWh, standing charge 55p/day

Estimated annual cost:

  • Tariff A: (2,700×£0.32) + (900×£0.15) + (365×£0.55) ˜ £1,200
  • Tariff B: (3,600×£0.25) + (365×£0.55) ˜ £1,101

Why E10 can lose here: the higher day rate applies to most usage, so the off-peak discount doesn’t compensate.

Before switching: do these 5 checks

  1. Confirm your meter type (E10/E7/smart/single-rate) and how many registers you have.
  2. Ask for the actual off-peak times used for billing on your setup (they may differ from what you expect).
  3. Check exit fees (if any) on your current tariff.
  4. Check payment method pricing (direct debit vs pay on receipt vs prepay where available).
  5. Check how readings are submitted (especially with multiple rate registers).

Economy 10 FAQs (UK)

What is Economy 10?
Economy 10 is a multi-rate electricity tariff that gives you around 10 hours of cheaper electricity each day, often split across different periods. It’s commonly used with storage heaters and immersion heaters.
Is Economy 10 available everywhere in the UK?
No. Availability varies by region, meter type and supplier. Some suppliers don’t support certain legacy E10 meters, and some areas mainly offer Economy 7 instead.
What times are Economy 10 off-peak hours?
It depends on your meter setup and local arrangements. Many E10 patterns include overnight hours plus one or two daytime blocks, but the exact times can vary. The safest approach is to confirm the off-peak times used for billing for your specific meter.
Can I switch supplier if I have an Economy 10 meter?
Often yes, but supplier choice can be more limited than for standard meters. Some suppliers may require a meter change (or may only offer you a single-rate tariff) depending on how your Economy 10 meter is configured.
Is Economy 10 cheaper than Economy 7?
Not always. Economy 10 can be cheaper if you can use a large share of your electricity in the off-peak windows. If most of your usage is daytime, a single-rate tariff—or sometimes Economy 7—can be cheaper overall.
Do I need a smart meter for Economy 10?
Not necessarily. Economy 10 has existed for years on traditional multi-register meters. A smart meter may support time-of-use tariffs, but not every smart setup replicates legacy Economy 10 in the same way. Always confirm tariff compatibility before changing meters.
How do I read an Economy 10 meter?
Many Economy 10 meters have multiple registers (for example Rate 1/Rate 2/Rate 3). Your bill should explain which register maps to which rate. If it’s unclear, ask your supplier to confirm which readings they need and how they label each register.
Can landlords stop me switching an Economy 10 tariff?
If you pay the energy bills, you can usually choose your supplier, but you may need permission for any meter changes or electrical work. If you’re unsure, check your tenancy agreement and discuss with your landlord/agent before making changes.
What if I have storage heaters but I’m not on Economy 10?
You might be on Economy 7, a different time-of-use arrangement, or a single-rate tariff. The right choice depends on how your heating is wired/controlled and when you can take advantage of cheaper periods. We can help you compare options based on your setup.

How we assess “the cheapest Economy 10 tariff this month”

Because Economy 10 is highly dependent on meter setup and region, our editorial approach is to define “cheapest” as the lowest estimated annual cost for a given user profile, rather than naming one national tariff.

Our assessment inputs (what we use)

  • Postcode/region (network area impacts pricing and availability)
  • Meter type (E10 multi-register, smart meter, etc.)
  • Payment method (direct debit vs other options where available)
  • Usage & split (annual kWh and estimated % off-peak)
  • Tariff features (unit rates, standing charge, fixed/variable, exit fees)

Limitations (what can change the result)

  • Supplier support for your exact E10 configuration can change
  • Off-peak hours can differ by meter setup; misalignment affects savings
  • Prices change; some tariffs are withdrawn quickly
  • Bill estimates depend on your true off-peak share and heating controls

Trust signals

Reviewed by
Energy Specialist
Last updated
April 2026

Sources (UK)

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Updated on 15 Apr 2026