Yes, your current supplier can block a business energy switch, but only on certain grounds. In practice that usually means money you owe them, or a switch date that falls inside your fixed term. If you're on a deemed contract, they can't object for either reason. Most objections can be cleared quickly once you know why they were raised.
Lots of businesses are lining up renewals over the winter, so it's worth knowing how objections work before you sign a new deal, not after a switch has stalled.
What is a switch objection?
When you agree a contract with a new supplier, it asks to register your meter points. Your current supplier (the "losing" supplier) then gets a short window to object. If it does, the transfer stops and you stay where you are.
Ofgem's own guidance for businesses says it plainly: your existing supplier may object to your switch, for example if you owe them money. Under the faster switching arrangements, a losing supplier has a two working day window to object for non-domestic customers, compared with one working day for households. Once that window closes without an objection, the switch goes ahead.
When is a supplier allowed to object?
For business customers, the starting point is your contract. When Ofgem redesigned the switching process, it decided suppliers could keep objecting to switches, including for any reasons agreed in a non-domestic customer's contract. So the exact grounds depend on your terms and conditions, but the common ones are:
- Unpaid bills. You've got an overdue balance with your current supplier.
- You're still in a fixed term. The switch date your new supplier asked for falls before your current contract can end.
- Notice hasn't been given. Some contracts for larger businesses require written notice of termination. If you haven't given it, the supplier may object.
- A problem with the switch request. For example, if it's for the wrong meter or the person who signed had no authority to sign.
You may have heard of a "28-day rule" that lets you switch if your debt is less than 28 days old. That's a household rule. For business accounts, what counts as overdue, and whether that's grounds to object, depends on what your contract says.
When can't a supplier object?
There are some important limits.
Deemed contracts. If you've moved into premises and are using energy without having agreed a contract, you're on a deemed contract. Business Debtline explains that on a deemed contract the supplier can't stop you switching for any reason or at any time. That means it can't object for debt or contract reasons, ask you to give notice, or charge a termination fee.
Rolling and out-of-contract rates. Ofgem says that on a variable-rate arrangement (a rolling or "evergreen" contract, out-of-contract rates or a deemed contract), you can switch to a new supplier at any time. Unpaid bills could still be grounds for an objection on some of these, though, so check your terms.
Microbusinesses at the end of a fixed term. If you qualify as a microbusiness, your supplier can't make you give notice before switching at the end of your fixed term. A "you didn't give notice" objection shouldn't apply to you.
Will my energy be cut off if my switch is blocked?
No. A blocked switch doesn't stop your supply. You keep getting energy from your current supplier and you keep paying for it.
The real risk is cost. If your fixed term has already ended, you could be sitting on out-of-contract or deemed rates while the objection gets sorted, and those are often much higher than fixed prices. That's why it pays to deal with any objection the same day you hear about it.
How do I get an objection removed?
It's usually your new supplier, or your broker if you're using one, who tells you about an objection. Then:
- Find out the reason. Ask your current supplier in writing why it objected. You can't fix it without knowing the exact reason.
- If it's debt, check the figure. Ask for an itemised statement. If the balance is right and you can pay it, pay it and get written confirmation. If you can't pay it all at once, ask whether a payment arrangement would get the objection lifted.
- If the debt is wrong, complain. Make a formal complaint about the bill and say the objection is based on an amount you dispute. Keep copies of everything.
- If it's about your fixed term or notice, check the dates. Compare your contract end date and notice terms with the switch date that was requested. Often the fix is just a later start date for the new contract.
- Ask for the switch to be resubmitted. Once the cause is dealt with, ask your current supplier to confirm it won't object again. Then ask your new supplier to resubmit the switch.
Citizens Advice suggests contacting its consumer helpline if you think you should be able to switch but your supplier won't let you. That's a sensible step if you're getting nowhere.
What happens to the new contract I've signed?
Check the new contract's terms. A blocked switch doesn't automatically cancel your new agreement, and it doesn't automatically keep it alive either. Some contracts stay pending until the switch completes. Others have a deadline for the supply to start, after which the price offer may change or lapse.
Remember that Ofgem notes most business energy contracts can't be cancelled within 14 days, unlike household ones. Ask the new supplier, in writing, what happens to your agreed prices if the start date has to move.
Can I complain about an unfair objection?
Yes. Start with your current supplier's complaints process. If it's not resolved, you may be able to go to the Energy Ombudsman, which is free.
As of November 2026, the Energy Ombudsman can take cases from small businesses that have fewer than 50 employees (or the full-time equivalent) and an annual turnover of up to £6.5 million or a balance sheet total of up to £5 million. You also qualify if you use no more than 200,000 kWh of electricity or 500,000 kWh of gas a year. The Ombudsman lists "problems that arise as a result of switching energy supplier" among the disputes it commonly sees. You can go to it once the supplier has had eight weeks to consider your complaint. Under its terms of reference, the maximum award for small business complaints against energy suppliers is £20,000.
One thing to know: Ofgem's guidance says small businesses can't get the automatic switching compensation that households can get, though you can still complain.
How can I avoid an objection in the first place?
Most objections are predictable. Before you agree a new deal:
- Clear or settle any overdue balance with your current supplier well before the switch date.
- Check your contract end date and set the new contract to start the day after it.
- Check whether your contract needs written notice. If it does, send it in the way and within the time your terms require, and keep proof.
- Make sure meter details match. Check that the MPAN (electricity) and MPRN (gas) on the new contract match your bills.
- Check you're a business customer at all. Citizens Advice notes that if your business is run from home, you'll usually be a domestic customer, and different switching rules apply.
What to do next
- Find your current contract and note the end date, notice terms and any clause on objections.
- Check your account for any overdue balance and sort it out before you switch.
- Work out whether you're a microbusiness or small business, as this affects your notice rights and Ombudsman access.
- If a switch is blocked, ask your current supplier in writing for the reason.
- Dispute any debt you think is wrong through a formal complaint.
- Confirm with your new supplier what happens to your agreed prices if the start date moves.
- If a complaint isn't resolved after eight weeks, check whether you can take it to the Energy Ombudsman.
This is general information, not financial advice.