Not every energy-saving tip you hear is true. Some popular myths can actually increase your household energy costs. Understanding what really works can help you reduce energy use, lower your bills and make informed decisions about your home in 2026.
With energy bills continuing to be one of the biggest household expenses, it’s understandable that homeowners are always looking for ways to save money.
Unfortunately, there’s also a lot of misinformation online. From heating advice to smart meters and switching suppliers, many common energy myths continue to circulate despite being inaccurate.
At Energy Watch UK, we believe homeowners deserve clear, independent advice that helps them understand the energy market and make informed decisions. Below are ten of the biggest energy-saving myths that many people still believe.
1. Leaving Your Heating On Low All Day Is Always Cheaper
This is probably the most common energy myth.
Whether leaving your heating on continuously costs less depends on your home’s insulation, heating system and how quickly your property loses heat.
For many households, heating your home only when required is often the more efficient approach.
2. Smart Meters Automatically Reduce Your Bills
A smart meter does not reduce your energy bills by itself.
Instead, it provides accurate meter readings and allows you to monitor how much gas and electricity your household uses.
The savings come from changing your habits after understanding your energy usage.
3. Switching Energy Supplier Means You’ll Lose Power
Many homeowners worry that switching suppliers could leave them without gas or electricity.
This isn’t true.
Your energy continues to be supplied through the same pipes and cables, while the administrative side of your account changes behind the scenes.
If you’re unsure about switching, especially if you have an outstanding balance, read our guide:
Can You Switch Energy Supplier If You Owe Money?
If you’re deciding whether now is the right time to switch, our article Should You Switch Energy Supplier Now or Wait in 2026? explains what homeowners should consider.
4. The Cheapest Monthly Payment Is Always the Best Deal
The estimated monthly payment is only one part of a tariff.
Before choosing a supplier, compare:
- Unit rates
- Standing charges
- Contract length
- Exit fees
- Customer service
- Renewable energy options
- Smart meter compatibility
For more advice, read How to Compare Energy Suppliers and Save Money in 2026.
5. The Ofgem Energy Price Cap Is the Cheapest Tariff
The Ofgem Energy Price Cap limits the maximum rates suppliers can charge customers on default tariffs.
It does not guarantee you’re on the cheapest tariff available.
Many homeowners also don’t realise that the price cap is closely linked to Standard Variable Tariffs.
To learn more, read:
- What Is a Standard Variable Energy Tariff?
- 0% VAT on Electricity Bills: What It Means for UK Households
6. Turning Your Thermostat Up Heats Your Home Faster
Turning the thermostat up to a much higher temperature doesn’t heat your home any faster.
It simply tells your heating system to continue running until that higher temperature is reached, which may increase energy use unnecessarily.
7. Appliances on Standby Don’t Use Electricity
Many televisions, games consoles, chargers and other appliances continue using small amounts of electricity when left on standby.
Turning off appliances that aren’t being used can help reduce unnecessary energy consumption over time.
8. Bigger Appliances Always Use More Electricity
Not necessarily.
A newer, energy-efficient appliance can often use less electricity than an older appliance that’s much smaller.
Always check the appliance’s energy efficiency rating rather than judging by size alone.
9. You Only Need to Compare Energy Suppliers Once
The energy market changes regularly.
New tariffs become available, contracts end and prices change throughout the year.
Reviewing your energy tariff every 12 months helps ensure you understand the latest options available.
Read our guide:
How Often Should You Compare Energy Suppliers?
10. Small Changes Don’t Make Any Difference
Many homeowners believe that changing one habit won’t affect their energy bills.
While one small change might have only a modest impact, several small improvements together can make a noticeable difference over the course of a year.
Examples include:
- Switching to LED bulbs.
- Turning appliances off standby.
- Improving insulation.
- Reviewing your tariff regularly.
- Monitoring your energy use.
- Servicing your heating system.
Energy Saving Tips That Really Work
Instead of following myths, focus on practical improvements that can help you manage your household energy more effectively.
These include:
- Comparing your tariff regularly.
- Understanding your current energy rates.
- Using energy-efficient lighting.
- Monitoring your daily energy use.
- Reducing unnecessary electricity consumption.
- Improving insulation where possible.
- Keeping your heating system well maintained.
Why Choose Energy Watch UK?
Energy Watch UK helps homeowners understand:
- Energy suppliers
- Household tariffs
- Smart meters
- The Ofgem Energy Price Cap
- Energy-saving advice
- Home energy news
Our goal is to provide clear, practical and independent information so homeowners can make informed decisions about their household energy.
To learn more, visit our Home page, read About Us, browse our FAQs, explore the Areas We Cover, and see what customers say on Trustpilot.
Frequently Asked Questions
Do smart meters automatically reduce energy bills?
No. Smart meters help you monitor your energy usage, but any savings come from changing how you use energy.
Is the Ofgem Energy Price Cap the cheapest tariff?
No. The price cap limits the maximum rates charged on default tariffs but does not guarantee the cheapest available deal.
How often should I compare energy suppliers?
At least once every 12 months or when your current tariff is ending.
Will switching supplier interrupt my energy supply?
No. Your electricity and gas continue as normal while your account transfers to your new supplier.
Can small changes really reduce energy bills?
Yes. Several small improvements combined can make a noticeable difference over time.
About the Author
John – Your Local Energy Watch UK Expert
John is your local Energy Watch UK expert, helping homeowners understand energy suppliers, tariffs and household energy costs. Through independent guidance and practical advice, his goal is to help homeowners make informed energy decisions with confidence.