Deciding to change energy supplier should always be a proactive consideration, not a disruption risk.
For some businesses, initial hesitation comes from not knowing if they can switch, how long it takes to change energy supplier, or what happens once the paperwork is signed.
Thankfully, trends are positive. Ofgem’s 2024 non-domestic market research found that 33% of businesses had switched supplier or contract in the previous year, and 78% of those that switched said the process was easy.
Still, the formal process permitting businesses to change energy supplier isn’t always neatly explained. This is generally because the switch is less about changing the wires or the meter and more about changing the commercial agreement around your supply.
If your current contract is ending, you have moved into out-of-contract rates, or you’d like improved support and clearer pricing when switching energy supplier, there is a practical route forward.
This guide explains how to change energy supplier, when you can switch, what to check before you agree terms, and where a business can get caught out. If you’re reviewing electricity and gas together, our business electricity and business gas pages are useful starting points for understanding how each fuel is quoted.
Why businesses change energy supplier
A business energy switch usually starts with one of a few commercial triggers.
- A contract may be close to expiry.
- A business may have inherited a deemed tariff after taking on a site.
- The support model may no longer be suited to your company.
In some cases, the issue is not the headline rate at all, but the amount of internal time being lost to billing queries, renewals, and slow account handling.
Price still matters, of course. In the same Ofgem research, 53% of businesses said the cheapest option was the main reason they chose their current supplier.
Even so, cost is only one part of a stronger business energy switch decision. Contract fit, billing clarity, and account support shape whether the agreement works well once the sale is over.
When can you change energy supplier?
Timing depends on the type of contract you are on and if you are still inside a fixed term. Citizens Advice guidance for small businesses states you will normally be able to switch if your fixed term has ended, if you are on a deemed tariff, or if you are on an out-of-contract arrangement. If you are still tied into a live contract, an early exit fee may apply.
For microbusinesses, the contract detail matters. Citizens Advice notes that some evergreen agreements can require up to 30 days’ notice, while rollover periods cannot be longer than 12 months. It also states a business energy supplier should contact microbusinesses around three months before the end of a fixed term to explain their switching options.
That is one reason it helps to start early.
If you leave the review until the final days of a contract, the decision may be rushed and the range of options available to you may narrow. Our guide on what happens when your energy contract ends and no one renews it covers why timing has such a big effect on the outcome.
Step-by-step: How to change business energy supplier
Processing a business energy switch is simple when the account details are clean and the contract terms are clear. In most cases, the steps look like this:
- Check when your contract ends
- Confirm your notice period
- Gather meter details (MPAN / MPRN)
- Request quotes
- Compare contract terms
- Agree the new contract
- Submit meter readings
- Complete the switch
Once the new contract is agreed, Citizens Advice states a business will typically be switched within five working days, unless a specific future date has been arranged with mutual consent.
What to check before switching energy supplier
A business energy quote should give you enough detail for a sensible comparison.
Keep in mind that a lower rate on paper can still lead to a weaker contract if the standing charge is high, the usage estimate is off, or the support model is unclear.
Before you change energy supplier, check the following points:
- Unit rate and daily standing charge
- Contract length and renewal terms
- Exit fees and notice requirements
- How annual usage has been estimated
- Who handles billing and account queries
If a broker is involved, it is worth understanding how they’re compensated. Citizens Advice states suppliers must explain broker payments in writing, but a verbal agreement may also be binding.
What can delay a business energy switch?
A business energy switch should be simple, provided you stick to a trusted, proven service. Most delays come from administrative friction and not the physical infrastructure of energy supply.
The common causes are simple enough:
- Incorrect meter or site details
- Missing notice under the current contract
- Unclear contract start and end dates
- Late or disputed meter readings
- Debt or unresolved account issues
This is where a clean handover defines the service you can expect from your new supplier.
Good onboarding should not stop at the sale.
It should cover account ownership, billing setup, contract records, and a clear point of contact once the switch is live.
What happens after you change energy supplier
In a standard business energy switch, your physical supply continues as normal.
The change is in the commercial agreement, the account setup, and who bills you going forward. That means the focus should move to accuracy and visibility. Make sure the opening read is submitted, the billing details are correct, and the agreed contract terms match what appears on the live account.
Generally, your decision to change energy supplier is a great opportunity to review how energy is being managed more broadly.
If your organisation is comparing multiple sites, mixed contract dates, or different operating patterns, a wider procurement review can add more value than a like-for-like renewal. Our article on the business energy procurement process explores that in more detail.
What if there is a problem after switching energy supplier
If you have tried to change energy supplier but are unhappy with the service you’ve received, the first step is always to raise the issue with the supplier or broker and follow the complaints process.
If the matter is not resolved, eligible smaller businesses now have another route. The Energy Ombudsman states that, from 19 December 2024, it can support qualifying small businesses with supplier disputes once the complaint process has been exhausted or the supplier has taken more than eight weeks to deal with the issue.
Wider protections should be embraced by good suppliers, because switching is only successful when the contract is clear and the service behind it holds up.
If your business would benefit from direct pricing, named support, and a simpler handover, you can get a quote from UGP or contact the team to review your current setup with zero obligation to move forward.
FAQs about changing business energy supplier
How long does it take to change energy supplier?
Once the new contract is agreed, a standard switch will normally complete within five working days, although a later date can be arranged if you need the new agreement to begin when your current contract ends.
Can I switch business energy supplier before my contract ends?
Sometimes, though an exit fee may apply. The answer depends on the contract terms, the notice period, and if the savings outweigh any early termination cost.
Can I switch on a deemed or out-of-contract tariff?
Yes, and it’s typically worth reviewing quickly. These tariffs are commonly more expensive and usually do not require a fee to leave.
Will my supply be interrupted when I switch?
In a normal supplier switch, your gas or electricity supply should continue as usual. The change is mainly contractual and administrative.
Do business energy contracts have a cooling-off period?
Usually not. That is why the written terms should be checked carefully before anything is agreed, especially if the contract has been discussed by phone.
Is it easy to switch business electricity supplier for a small business?
Yes, it’s usually simple when your contract dates, meter details and recent usage information are ready. A recent electricity bill will usually give the supplier most of what they need to prepare a quote and manage the transfer.
Is it easy to switch business gas supplier for a small business?
Yes, provided your gas contract details are clear and your MPRN, usage and site information are accurate. The supplier transfer should be managed in the background, so your gas supply continues as normal during a standard switch.
