A close friend of mine called me recently, frustrated about her skyrocketing electricity bill. She was with the same energy supplier for years and never considered changing. Like many people in the UK, she assumed it was too much hassle or that changing energy supplier wouldn’t make a difference. But after doing a quick comparison, she found a better deal—one that would save her nearly £350 per year.
She’s not alone. According to Ofgem, millions of UK households are overpaying for their energy simply because they haven’t switched suppliers. A recent report showed that customers who switch to a cheaper fixed-rate tariff could save between £200 and £350 annually.
With energy prices fluctuating, switching providers can help you lock in better rates, improve customer service, and even switch to greener energy sources. But many people don’t know where to start. This guide breaks down everything you need to know about changing an energy supplier in the UK, how to compare tariffs, and whether switching to popular suppliers like British Gas or Octopus Energy is worth it.
Why Should You Change Your Energy Supplier?
Switching energy suppliers isn’t just about cost—it’s about getting a better service and more control over your bills. Here’s why switching makes sense:
- Save Money – Energy providers change their tariffs regularly, and new customers often get better deals than existing ones.
- Fixed-Rate Protection – Locking in a fixed-rate deal can shield you from price hikes.
- Better Customer Service – If your current supplier has poor reviews or slow response times, switching can improve your experience.
- Greener Energy Options – Many suppliers offer 100% renewable electricity and carbon-neutral gas.
💡 Fact: In 2023, only 12% of UK households switched energy suppliers, even though many could save hundreds of pounds. (Ofgem)
How to Change Energy Suppliers in the UK
Changing an energy supplier in the UK is straightforward, but to ensure a smooth transition, you need to follow the right steps. Here’s a guide on how to switch energy suppliers effectively.
Step #1: Check Your Current Energy Tariff
Before switching, you should review your current tariff details to determine if you are overpaying for energy. Your latest bill or online account will provide key information, including:
- Tariff name – This could be a standard variable tariff (SVT), fixed-rate tariff, Economy 7, or time-of-use tariff.
- Energy usage – Measured in kilowatt-hours (kWh) per month or year, which helps compare deals accurately.
- Standing charge – This is a daily charge applied to your bill regardless of energy usage.
- Exit fees – Some fixed-rate plans have early exit fees ranging from £20 to £60 per fuel (gas/electricity).
Why This Step Matters
- If you are on a Standard Variable Tariff (SVT), you are likely paying more than necessary because SVTs fluctuate with market prices.
- If you are nearing the end of a fixed-rate contract, switching before your supplier moves you to an SVT can prevent price increases.
- Knowing your usage and tariff details helps you compare suppliers based on actual consumption, not just estimates.
What to Do Next
- Check your contract end date. If it’s within 49 days, you can switch without penalty, thanks to Ofgem’s energy switching rule.
- If you’re unsure about your tariff details, contact your supplier or check your online energy account.
Step #2: Compare Energy Suppliers
Once you have your energy usage details, use an Ofgem-approved energy comparison site to find a better deal. These sites allow you to compare tariffs based on your actual energy consumption.
Ofgem-Approved Energy Comparison Sites
- Uswitch (uswitch.com)
- MoneySuperMarket (moneysupermarket.com)
- Compare the Market (comparethemarket.com)
- Energy Helpline (energyhelpline.com)
What to Look for When Comparing Deals
- Unit rate (pence per kWh) – The price per unit of electricity and gas you consume.
- Standing charge – Some providers charge higher daily fees, even if you use little energy.
- Fixed vs. variable tariffs – Fixed tariffs lock in prices for a set period, while variable tariffs can change with the market.
- Green energy options – Some suppliers offer 100% renewable electricity or carbon-neutral gas.
- Customer service ratings – Check reviews on Trustpilot or Citizens Advice for supplier reliability.
Additional Considerations for Prepayment Meter Users
- If you use a prepayment meter, some suppliers offer lower standing charges and competitive prepaid rates.
- Compare tariffs designed for prepayment customers to ensure you’re getting the best value.
Step #3: Check for Exit Fees and Contract Terms
Before switching, check whether your current tariff has early exit fees. These fees apply if you leave a fixed-rate contract before its official end date.
Key Contract Rules to Know
- Fixed-term tariffs may have exit fees between £20 and £60 per fuel (gas and electricity).
- If your contract is ending within 49 days, you can switch without penalty, thanks to Ofgem regulations.
- If you’re on a standard variable tariff, there are no exit fees, so you can switch anytime.
How to Determine If Switching is Worth It
- Calculate the savings from switching versus the cost of exit fees.
- If a new supplier offers a significantly lower tariff, paying the exit fee may still be worthwhile in the long run.
Step #4: Choose a New Supplier and Start the Switch
Once you find the best energy deal, the switching process is straightforward.
How to Initiate the Switch
- Sign up with your new supplier through their website or the comparison site.
- Your new supplier will contact your current provider to manage the switch for you.
- You do not need to notify your old supplier or cancel your contract manually.
How Long Does the Switch Take?
- The process typically takes 5 to 21 days.
- There is no disruption to your energy supply—you won’t lose power during the switch.
What Happens After You Switch?
- Your new supplier will confirm your start date and any direct debit setup.
- Your old supplier will send a final bill, which should reflect the last meter reading before the switch.
Step #5: Submit Your Final Meter Readings
To ensure accurate billing, you will need to submit a final meter reading to both your old and new suppliers.
Why Final Meter Readings Are Important
- It prevents overcharging by ensuring the old supplier only bills for actual usage.
- It creates a clear handover point for your new supplier.
How to Submit a Meter Reading
- Your new supplier will request the reading, which you can provide online, via an app, or over the phone.
- If you have a smart meter, the reading may be sent automatically without manual input.
What to Do If There’s a Billing Dispute
- Keep a copy of your final meter reading for reference.
- If your old supplier overcharges you, provide proof of the correct reading to resolve the issue.
Different Types of Energy Tariffs
When switching suppliers, it’s essential to understand the different tariff types so you can choose one that suits your usage and budget.
#1. Fixed-Rate Tariff
- Locks in a set price per unit of energy for a fixed term (usually 12, 18, or 24 months).
- Best for: Households that want price stability and protection from sudden market increases.
- Drawback: If energy prices fall, you won’t benefit from lower rates.
#2. Standard Variable Tariff (SVT)
- Prices can go up or down depending on market conditions.
- Best for: Households that want flexibility and no exit fees.
- Drawback: SVTs are often more expensive than fixed deals.
#3. Economy 7 and Economy 10 Tariffs
- Offers cheaper rates during off-peak hours (usually overnight).
- Best for: Homes with storage heaters or electric vehicle (EV) charging needs.
- Drawback: Peak-time rates can be much higher than standard tariffs.
#4. Green Energy Tariffs
- 100% renewable electricity from wind, solar, or hydropower.
- Some suppliers also offer carbon-neutral gas.
- Best for: Households that want to reduce their carbon footprint.
💡 Tip:
- Some energy providers now offer “agile tariffs”, where prices change daily based on wholesale rates. These work well for tech-savvy users who can shift energy use to cheaper times.
Case Studies or Examples of Real Savings
Many people hesitate to switch because they assume the savings are minimal. However, real-life examples show that households can save hundreds per year by switching suppliers.
Example 1: A London Household Switching from British Gas to Octopus Energy
- Before switching:
- Supplier: British Gas
- Tariff: Standard Variable Tariff
- Annual electricity usage: 3,200 kWh
- Annual gas usage: 12,000 kWh
- Annual cost: £2,100
- After switching:
- Supplier: Octopus Energy (12-month fixed)
- New annual cost: £1,750
- Total savings: £350 per year
Example 2: A Family in Manchester Switching from an SVT to a Fixed-Rate Tariff
- Before switching:
- Supplier: EDF Energy
- Tariff: Standard Variable Tariff
- Monthly bill: £250
- After switching to a fixed-rate deal with OVO Energy:
- New monthly bill: £210
- Total savings: £480 per year
💡 Takeaway:
- Households still on an SVT can switch to a fixed tariff and save anywhere between £200-£400 per year.
Additional Considerations Before Changing an Energy Supplier
Before making the switch, consider special circumstances that may affect the process.
What If You’re on a Prepayment Meter?
- Prepayment meters require topping up in advance, and not all suppliers offer competitive rates for these customers.
- Some suppliers charge higher standing fees for prepayment customers.
- If you want to switch to a standard tariff, you may need to request a credit meter.
What If You’re Renting?
- Tenants have the right to switch energy suppliers if they pay the bills directly.
- If the landlord includes energy in the rent, switching must be agreed upon.
- Some rental agreements may specify preferred suppliers, so it’s worth checking the lease contract.
What If You Have Debt on Your Energy Account?
- If you owe less than £500 on a prepayment meter, you can still switch suppliers under Ofgem rules.
- For standard credit meters, most suppliers require debt to be repaid before switching.
- If switching to a supplier with cheaper rates, negotiating a repayment plan may be possible.
Step-by-Step Guide to Changing to Specific Energy Suppliers
If you are interested in specific suppliers like British Gas, Octopus Energy, or EDF Energy, here is a mini step-by-step guide for switching.
How to Switch to British Gas
- Visit the British Gas website and enter your postcode.
- Compare tariffs to see if a fixed or variable plan suits your needs.
- Click “Sign Up” and enter your meter details.
- British Gas will handle the switch and notify your old supplier.
- You’ll receive confirmation and a switching date (usually within 5 to 21 days).
How to Switch to Octopus Energy
- Visit the Octopus Energy website.
- Select a tariff (Octopus Fixed, Agile, or Go for EV users).
- Enter your address and meter details.
- Octopus handles the switch and provides £50 credit if referred by a friend.
How to Switch to EDF Energy
- Go to EDF Energy’s website and enter your energy consumption details.
- Choose between standard fixed-rate tariffs or smart time-of-use tariffs.
- EDF will manage the switch and notify your old supplier.
💡 Fact:
- Octopus Energy is known for having no exit fees on most tariffs, making it a great option for those who want flexibility.
FAQs About Changing an Energy Supplier in the UK
Can I Change My Energy Supplier in the UK?
Yes, anyone in the UK can switch suppliers anytime, unless they have an outstanding debt on a prepayment meter over £500.
Do I Need a New Smart Meter If I Change Supplier?
No—your existing smart meter will continue working with your new supplier.
Some older SMETS1 smart meters may lose smart functionality temporarily after switching, but this usually gets resolved.
💡 Tip: If your new supplier offers a free upgrade to a SMETS2 smart meter, it’s worth considering.
How to Swap to British Gas?
- Visit the British Gas website and enter your postcode to compare tariffs.
- If their tariffs are competitive, sign up online.
- British Gas will contact your current supplier and handle the switch.
💡 Tip: British Gas offers Hive Smart Home bundles with some tariffs, which might be useful if you want smart home integration.
Is It Worth Switching to Octopus Energy?
- Yes, if you want competitive prices and 100% renewable energy.
- Octopus Energy is known for award-winning customer service and innovative tariffs, including time-of-use tariffs that reward you for using electricity during off-peak hours.
💡 Fact: Octopus Energy was rated the best energy supplier in the UK for customer satisfaction in 2024.
Is Octopus Energy Cheaper Than British Gas?
- In many cases, yes. Octopus often has lower standing charges and better renewable energy deals.
- However, prices change based on region and tariff type, so it’s best to compare on a price comparison website.
💡 Tip: Octopus Energy has no exit fees on most tariffs, making it flexible for switching.
What Is the Electricity Tariff in the UK?
- As of 2024, the average UK electricity price is around 30p per kWh, which varies by supplier and region.
- Fixed tariffs lock in prices, while standard variable tariffs change with the market.
💡 Tip: The Ofgem energy price cap influences rates, but fixed deals can still be cheaper in the long run.
Key Takeaways
- Switching energy suppliers is simple and can save you hundreds of pounds per year.
- Use Ofgem-approved comparison sites to find the best deals.
- You don’t need a new smart meter when switching suppliers.
- Octopus Energy is often cheaper than British Gas, but always compare deals.
- If your contract is ending within 49 days, you can switch without penalty.
Conclusion
Changing an energy supplier is one of the easiest ways to cut your household expenses. With rising energy costs, taking a few minutes to compare tariffs could save you hundreds per year. Whether you’re looking for cheaper rates, better service, or greener energy, making the switch is quick, hassle-free, and beneficial in the long run.
💡 Are you paying too much for energy, or is it time to start comparing new deals?
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