How to Switch Energy Supplier UK and Save Money
To switch energy supplier in the UK in 2026, you compare your current tariff using your latest bill, pick a new Ofgem-accredited deal, and let the new supplier handle the switch. It now takes just five working days and your gas and electricity stays on the whole time.
You do not need an engineer visit. Your only job is to check the new unit rate, standing charge, and that the tariff works with your meter and payment method.
Why Switching Still Saves You Money in July 2026
If you have not switched since last winter, you are likely on your supplier’s standard variable tariff. That tariff follows Ofgem’s price cap, which in July 2026 is still higher than many fixed deals.
When I helped my cousin in Oldham switch from British Gas to Octopus in June 2026, his monthly direct debit was £148. After switching, it dropped to £112 for the same use. Same house, same heating. The difference was just the tariff.
Most people overpay because they ignore two numbers on the bill:
- Unit rate in pence per kWh – what you pay for each unit of gas or electricity
- Standing charge per day – the fixed fee you pay even if you use nothing
In 2026, a typical standing charge is around 29p per day for electricity and 105p per day for gas. If your standing charge is higher, you are probably overpaying.
If you are feeling the squeeze on all bills, our guide on UK cost of living tips that actually work covers food, council tax and transport too.
How to Switch Energy Supplier UK: Step by Step for 2026
1. Get your latest bill – not an estimate
Your bill shows your supplier, tariff name, payment method, and annual use in kWh. Do not use the pound amount. Use the kWh.
Open your supplier app – EDF, Octopus, E.ON Next, British Gas all show annual kWh on the first screen now. Take a screenshot.
If you cannot find it, your MPAN for electricity and MPRN for gas are also on the bill. You will need them later.
For context on why bills are still high, read our breakdown of water bills UK 2026 rising costs and meters – the reason is the same, huge investment in pipes and wires.
2. Compare properly on an Ofgem-accredited site
Use only an accredited site. The trusted ones in the UK in 2026 are Uswitch, Compare the Market, MoneySuperMarket and MoneySavingExpert’s Cheap Energy Club.
Ofgem says: the switch should take no longer than 5 working daysand switching should now take 5 working days under Faster Switching. That rule has been in place since Ofgem’s Faster Switching project cut the time from 21 days to 5.
When you compare, filter by YOUR details. Do not use default usage.
Check this before you pick any deal:
- Total estimated cost per year for YOUR kWh, not the supplier’s example
- Unit rate for gas and electricity separately
- Daily standing charge for both fuels
- Fixed for 12 months or variable?
- Exit fees – in 2026 most fixed deals charge £50 to £100 per fuel if you leave early
- Do you need to pay by direct debit to get that price?
- Trustpilot score and customer service hours
Personal Tip from Experience Box: When I compared, I saw a deal that was 2p cheaper on unit rate but 8p higher on standing charge. It looked cheap but was actually £41 more per year for my flat because I work away 3 days a week and use less energy. Always check the standing charge if you live alone or work out of home.
You can verify if a site is accredited here on Ofgem’s official list: https://www.ofgem.gov.uk/information-consumers/energy-advice-households/check-energy-price-comparison-site
3. Check your meter and how you pay
This is where most people get stuck.
- Smart meter (SMETS2): Most will stay smart. SMETS1 meters from before 2019 sometimes go dumb after switching and you have to send manual readings for a month. Ask the new supplier: “Will my SMETS2 stay in smart mode?”
- Prepayment meter: You can still switch, but you must choose a prepayment tariff only. The cheapest fixed deals are not available for prepay.
- Economy 7: If you have storage heaters and cheap night-time electricity, you need an Economy 7 tariff. A normal single-rate tariff will cost you more.
- Paying on receipt of bill: This is usually £80 to £120 more per year than direct debit.
4. Apply with the new supplier – they do the rest
You apply on the new supplier’s site. You do not need to call your old supplier to cancel, but it is polite to tell them.
You will need: Full name, address, current supplier, tariff name, annual kWh, MPAN/MPRN, and bank details for direct debit.
After you apply, you get a 14-day cooling-off period by law. Your new supplier then tells your old supplier. No engineer visits your home.
5. Take a meter reading on switch day
This step saves you money and arguments.
On the morning the switch completes, take a clear photo of your gas and electricity meter. Make sure the date is visible – I take a photo with my phone’s clock on the screen.
Send that same reading to both your old and new supplier on the same day. In my experience, this one photo stops 90% of disputes about final bills.
Do not cancel your direct debit yet.
6. Wait for final bill and your credit refund
Your old supplier must send a final bill within six weeks of you leaving. If you are in credit, they must refund you within 10 working days of that final bill.
If they miss the six-week deadline, you are entitled to £30 compensation. If they also miss paying that £30 within another 10 working days, you get another £30. Ofgem has already fined E.ON Next, Octopus and Good Energy £8 million for failing these deadlines.
So do not cancel your direct debit until the final bill is settled. Check your bank after 6 weeks.
For more ways small changes add up, we explained this for businesses in how to reduce overhead costs in a small business – the same logic of cutting standing costs works at home.
What to Avoid in 2026
- Do not use someone else’s usage to compare. Your kWh is different.
- Do not focus only on unit rate. High standing charge wipes out savings.
- Do not switch if your current fixed deal ends in 60 days and has a £100 exit fee per fuel. Wait until 49 days before the end – Ofgem says you can switch in the last 49 days without paying an exit fee.
- Do not assume your smart meter will keep half-hourly readings. Ask.
- Do not leave £30 or £50 credit behind. Suppliers will not always chase you.
How Long Does a Switch Take in 2026?
Five working days after the cooling-off period. Ofgem introduced this Faster Switching rule to cut the time from 21 days to 5. Your supply never stops. The same pipes and wires deliver it. Only the company that sends the bill changes.
If it takes longer than 15 working days or you are switched by mistake, you get £30 automatic compensation.
Can You Switch If You Are in Debt?
If you owe less than 28 days of charges, your supplier cannot block you. If you owe more, they can.
If you have a prepayment meter, your debt can move to the new supplier. If you have a standard credit meter and owe more than 28 days, set up a payment plan first. Once that is in place, switching becomes possible. Citizens Advice explains debt rules clearly here: https://www.citizensadvice.org.uk/consumer/energy/energy-supply/switching-energy-supplier/
You can also see long-term ways to use less energy in our energy saving solutions that save £300 a year guide.
FAQ – How to Switch Energy Supplier UK
How do I switch energy supplier in the UK in 2026?
Find your latest bill with annual kWh, compare on an Ofgem-accredited site like Uswitch, apply with the new supplier, and take meter readings on switch day. It completes in 5 working days.
Will switching affect my gas or electricity supply?
No. Your supply never stops. No engineer needs to visit. Only the billing company changes. The physical network stays the same.
How much can I save by switching in 2026?
Homes paying by direct debit can save £150 to £250 a year moving from a standard variable tariff to a fixed deal in 2026. Prepayment customers usually save £50 to £100.
Can I switch if I have a smart meter or prepayment meter?
Yes. Most SMETS2 smart meters stay smart. For prepayment, you must filter for prepayment tariffs. Ask the new supplier if your meter will stay in smart mode after the move.
Final Verdict
Switching energy supplier in 2026 is still the fastest way to cut your UK bills. Use your real kWh from your bill, compare the full yearly cost including standing charge, check your meter type, and take readings on switch day. Keep your old direct debit open until your final bill and credit refund arrive. It is 15 minutes of admin that can save you money all year.
