If you’re wondering how long it takes to switch energy supplier in the UK, the answer has changed in recent years.
Thanks to updated regulations from Ofgem, most energy switches now complete within 5 working days.
The actual application only takes about 20 minutes online, and once you’ve signed up your new supplier takes care of the rest.
You still have a 14-day cooling-off period, but you no longer have to wait for it to end before the switch happens. In most cases, households are moved to their new tariff within a week.
Even better, if a supplier takes longer than five working days, you could receive £30 compensation automatically under the Energy Switch Guarantee.
For something that takes less time than watching an episode of a sitcom, it’s one of the easiest ways to potentially cut your household bills.
Why Switching Energy Supplier Still Matters in 2026
Energy prices have been extremely volatile over the last few years.
As of April 2026, the UK energy price cap for a typical household is £1,641 per year. That’s a welcome drop from previous highs, but it still means many households are paying more than they need to.
Switching suppliers can often save £115–£150 per year compared with staying on a default tariff. Some households with higher usage may save even more.
When I bought my first house back in 2004, we barely thought about switching. We simply stuck with the supplier that was already there.
These days it’s very different. With prices changing regularly, keeping an eye on your tariff can make a noticeable difference to your annual energy costs.
How Long Does It Take to Switch Energy Supplier?
Most energy switches now complete within 5 working days.
Here’s a typical timeline.
Day 1 – You choose a tariff and start the switch online.
Day 2 – Your new supplier confirms the switch and contacts your old provider.
Day 5 – Your new tariff becomes active.
Throughout the process your gas and electricity supply continues as normal.
There’s no engineer visit, no interruption to service, and you don’t need to contact your old supplier.
What Happens During an Energy Switch?
Switching energy supplier sounds complicated, but most of the work happens in the background.
Here’s what usually happens.
First, you choose a new tariff and start the switch through a comparison site such as uSwitch or Confused.com.
Your new supplier then contacts your current supplier and arranges the transfer.
Around the switch date, you’ll normally submit a meter reading so both suppliers agree on your final bill.
Your old supplier then produces a final statement and refunds any credit balance.
The whole process is designed to be seamless.
What If the Switch Takes Longer Than 5 Days?
Under the Energy Switch Guarantee, suppliers must complete most switches within 5 working days.
If they take longer, you may be entitled to automatic compensation of around £30.
This payment should be credited directly to your account without you needing to claim it.
Can I Switch Energy Supplier at Any Time?
Yes — but there’s one important thing to check.
If you’re on a standard variable tariff, you can switch at any time with no exit fees.
If you’re on a fixed tariff, you may need to pay an early exit fee.
In 2026, these fees are often higher than they used to be. Many suppliers now charge £50–£75 per fuel for leaving a contract early.
That means a dual-fuel household could face exit fees of £100–£150.
However, if the savings from switching are greater than the exit fees, it may still be worth doing.
Can My Supplier Stop Me From Switching?
In most cases, no.
The main exception is if you have outstanding debt that has been unpaid for more than 28 days.
If you use a prepayment meter, you can usually still switch as long as the debt is below £500 per fuel. This debt can be transferred to the new supplier under the Debt Assignment Protocol.
👉 Find out more about switching suppliers if you’re in debt.
What Happens If My Supplier Owes Me Money?
Many households build up credit balances when paying by direct debit.
When you switch supplier, your old provider must send a final bill and refund any remaining credit.
This usually happens within around 10 working days after the final bill is issued.
What Is the Cheapest Way to Pay for Energy?
When switching energy suppliers, you’ll normally be offered several payment options.
Monthly direct debit is still usually the cheapest option, although the gap between payment methods has narrowed in recent years.
Prepayment customers used to pay significantly more, but government policy changes have reduced the difference between tariffs.
Most households still choose monthly direct debit because it spreads the cost evenly across the year and makes budgeting easier.
Can You Have Different Suppliers for Gas and Electricity?
Yes, you can.
However, most households choose a dual-fuel tariff because it is usually cheaper to have both fuels with the same supplier.
How Do I Switch Energy Suppliers?
Switching gas and electricity supplier is simpler than most people expect.
Start by finding your latest energy bill. This will show your tariff and estimated annual usage.
For reference, my household currently uses roughly:
Electricity: 1,982 kWh per year
Gas: 12,110 kWh per year
My electricity usage is relatively low because I have solar panels installed.
If you can’t find your annual usage figures, comparison sites can estimate your costs using your monthly payment.
Once you’ve entered your details, the comparison site will show a list of tariffs available in your area.
If you find a better deal, simply complete the switch online and your new supplier will handle everything else.
If Octopus Energy appears among the cheapest options, you can use my referral code and receive £50 credit when you switch.
Ready to Switch?
If you want to see how much you could save, try a comparison site and check the deals available in your area.
And don’t forget to check cashback sites as well. Sometimes you can earn extra cashback just for starting your switch through them.
Want to Reduce Your Energy Bills Even Further?
Find out more about reducing your heating bills.
Check out the best energy-saving devices
Or take a look at how a smart thermostat could help lower your energy costs.
Energy Supplier Switching FAQs
Will my gas or electricity be cut off during a switch?
No. Your energy supply continues as normal during the switch.
The change only happens in the billing system. The gas pipes, electricity cables, and meters in your home all stay exactly the same.
You won’t notice the switch happening.
Do I need a new smart meter to switch supplier?
No. You can switch energy supplier whether you have a smart meter, traditional meter, or prepayment meter.
Most modern smart meters will continue to work after you switch. If they temporarily lose smart features, they usually reconnect automatically once the new supplier takes over.
Can I cancel an energy switch after signing up?
Yes. You have a 14-day cooling-off period after starting the switch.
If you change your mind, you can cancel without any penalty during this time.
What information do I need to switch energy supplier?
Switching usually takes around 15–20 minutes and you only need a few details:
• Your postcode
• Your current energy supplier
• Your latest meter readings
• Your annual usage (kWh) if available
If you don’t have usage figures, comparison sites can estimate them based on your property.
Can I switch energy supplier if I rent my home?
Yes — as long as you pay the energy bills directly.
If energy is included in your rent, the landlord usually controls the supplier.
Do I have to contact my old energy supplier?
No. Your new supplier handles the entire switching process.
The only thing you’ll normally need to do is submit a meter reading around the switch date so both companies agree on the final bill.
Is it worth switching energy supplier for small savings?
Even relatively small savings can add up.
Saving £120 per year might not sound huge, but that’s roughly £600 over five years for the same amount of energy.
And because switching now takes less than 20 minutes, the “hourly rate” of that saving can be surprisingly high.