You have spotted a cheaper deal. You are ready to switch. But before you click “confirm” on that comparison site, a nagging question stops you: Am I supposed to call my current energy supplier first?
It’s a question millions of UK households ask, and the confusion is understandable. After all, when you change broadband or mobile providers, you usually need to request a PAC code or formally cancel. So why would energy be any different?
Here’s the simple answer: in 2026, you rarely need to contact your existing energy supplier when switching. Ofgem rules require your new supplier to manage every part of the process, from notifying your old provider to arranging your final bill. But there are a handful of situations where a quick call can save you money, prevent delays, or unlock a better deal.
Let’s break down exactly what those situations are, and what you can safely ignore.
The 30-Second Answer
Your new energy supplier handles the switch. Not you. Not your old supplier.
Once you sign up online, your new provider takes over and:
- Tells your old supplier you are leaving
- Transfers your meter point registration
- Sets your switch date (within 5 working days)
- Sends your final meter reading to your old supplier
- Sets up your new tariff and Direct Debit
You only need to do one thing: take a meter reading on your switch date and send it to your new supplier. That’s it.
If your switch takes longer than 5 working days due to your supplier’s fault, Ofgem rules entitle you to £30 in automatic compensation, paid directly into your account or bank.
Why People Think They Need to Call (And Why They Don’t)
The “must contact your old supplier” myth comes from how energy switching used to work in the early 2000s. Back then, you really did have to give notice, request transfer codes, and chase paperwork between two suppliers.
That changed with Ofgem’s switching reforms. By 2024, the regulator had introduced:
- A legal duty for the new supplier to manage the switch
- A 5 working day maximum switch time
- Automatic £30 compensation for delayed switches
- A 14-day cooling-off period to cancel without penalty
In 2026, those protections will be strengthened further. The Government’s Ofgem Review has expanded the regulator’s enforcement powers, meaning suppliers now face larger fines and faster sanctions if they fail to deliver smooth switches.
The bottom line: the system is designed to take the burden off you.
When You Should Still Pick Up the Phone
While the switch itself is hands-off, there are six scenarios where a five-minute call to your current supplier is genuinely worth your time.
Scenario 1: You Want to Know Your Exit Fees
If you are mid-contract on a fixed tariff with more than 49 days left, leaving early usually triggers an exit fee, typically £25 to £75 per fuel.
What to ask: “What is my exit fee, and when does my contract end?”
If your savings from switching outweigh the fee, go ahead. If not, you might prefer to wait until your renewal window opens.
Scenario 2: You Have a Balance to Reclaim
If you pay by Direct Debit, there is a strong chance you are in credit, especially after a mild winter. Your old supplier must refund any credit balance within 10 working days of issuing your final bill.
What to ask: “Will my credit balance be refunded automatically, or do I need to request it?”
Scenario 3: You Owe Money
You generally cannot switch supplier if you have owed money for more than 28 days. Calling first lets you set up a repayment plan or clear the debt before your switch is rejected.
Scenario 4: You Want a Retention Offer
Many suppliers reserve their best deals for customers threatening to leave. A short call to their retention team can sometimes match or beat the deal you found elsewhere.
What to ask: “I have found a cheaper deal with another supplier. Can you offer me anything to stay?”
You will be surprised how often this works.
Scenario 5: Your Switch Has Been Rejected
Sometimes your old supplier “objects” to the switch due to debt, an address mismatch, or a meter registration error. Your new supplier will tell you, but resolving it usually requires speaking with your old supplier directly.
Scenario 6: You Have a Special Meter or Tariff
If you have an old radio teleswitch (RTS) meter, an Economy 7 setup, or a complex multi-rate arrangement, call ahead. Some new suppliers cannot read or bill these meters correctly until the meter is replaced or reconfigured.
The RTS signal is being switched off across the UK, so this is the perfect moment to ask about a free smart meter upgrade.
What’s New in 2026: Stronger Consumer Protection
The energy switching landscape has shifted in your favour this year. Three changes stand out.
- Tougher smart meter rules from February 2026. Ofgem extended its Guaranteed Standards of Performance to include smart meters. Suppliers who fail to install, repair, or maintain smart meters in working order must pay automatic compensation. This makes switching with a smart meter significantly more reliable.
- Ofgem’s new enforcement powers. Following the 2026 Ofgem Review, the regulator can now act directly against suppliers who fail customers, ordering compensation and applying sanctions without lengthy court action.
- The April 2026 price cap drop. The cap fell by 7% to £1,641 a year for a typical household. Fixed-rate deals are once again undercutting the cap, so switching is now genuinely worthwhile for most people on standard variable tariffs.
The Three-Step Switch: What You Actually Need to Do
Forget complicated checklists. Here is the entire process you are responsible for:
- Compare and choose a new tariff using a reputable comparison tool.
- Sign up with your new supplier, providing your address, bank details, and tariff name.
- Submit a meter reading on your switch date.
Everything else, including all communication with your old supplier, is handled for you.
Common Mistakes to Avoid
A handful of small errors cause the vast majority of switching headaches. Here is what to watch out for.
Cancelling your old Direct Debit too early. Wait until your final bill is settled and any refund is paid. Cancel too soon, and you can end up with payment disputes or delayed refunds.
Skipping the meter reading. Without an accurate reading on your switch date, you may be billed for energy you did not use, or worse, your old supplier may estimate the reading at a higher amount.
Ignoring confirmation emails. Both your old and new suppliers will send confirmation. Save these for your records in case of disputes.
Forgetting your cooling-off period. You have 14 days after signing up with your new supplier to cancel, no questions asked. After that, you are committed.
Frequently Asked Questions
Do I have to give notice to my current energy supplier?
No. There is no notice period when switching energy in the UK. Your new supplier handles all communication with your old one.
Will my old supplier try to stop me from switching?
They legally cannot block your switch unless there is a specific issue such as outstanding debt, a meter dispute, or an unpaid exit fee on a fixed contract.
What happens to my old account when I switch?
Your old supplier closes your account and sends a final bill within 6 weeks of the switch. Any credit balance is refunded within 10 working days of that bill being issued.
Should I cancel my Direct Debit before switching?
No. Wait until you have received your final bill and any refund is paid. Then cancel through your bank.
What if I change my mind after starting the switch?
You can cancel within the 14-day cooling-off period by contacting your new supplier. After this period, exit fees may apply.
Do I need to contact my supplier if I am moving house?
Yes. Moving home is different from switching. You must contact your current supplier to close the account at your old address and notify the supplier at your new address. You can then switch suppliers at the new property if you choose.
Will switching damage my credit score?
No. Energy suppliers may run a soft credit check that does not affect your score. Switching itself has no impact on your credit file.
Do I need to do anything if I have a smart meter?
No, although you may need to provide manual readings briefly if your smart meter temporarily loses smart functionality during the switch. From February 2026, suppliers must compensate you if a smart meter is not restored to working order in good time.
What if my old supplier keeps charging me after the switch?
Contact your new supplier first, as they manage the switch process. If unresolved within 8 weeks, escalate to the Energy Ombudsman for free, independent help.
Is the £30 switching delay compensation paid automatically?
Yes. If your new supplier takes longer than 5 working days to switch you, the £30 must be paid automatically into your energy account or bank, with no claim needed.
Can I switch back to my original energy supplier later?
Yes. You can switch as often as you like, although exit fees may apply if you are in a fixed contract.
The Bottom Line
In 2026, switching energy supplier is one of the easiest financial moves you can make. You do not need to contact your old energy supplier to start the process. Sign up with your new provider, take a meter reading on switch day, and let the system do the rest.
The only reasons to pick up the phone are practical ones, checking exit fees, reclaiming credit, settling debt, asking for a retention deal, resolving a rejected switch, or sorting out a non-standard meter.
With stronger Ofgem protections, automatic compensation for delays, and a falling price cap, there has never been a better time to lock in a cheaper deal and stop overpaying for energy.
