Switch Energy Supplier UK - How to Change Gas and Electricity Providers in 2026

Understand how to switch energy suppliers in the UK, compare electricity and gas tariffs, avoid unnecessary charges and manage energy accounts when moving, renting or buying property.

Switching energy suppliers can help households and businesses review their electricity and gas costs, access different tariffs and choose providers that better suit their financial circumstances.

For homeowners, tenants and landlords across the United Kingdom, energy expenses represent an important part of property running costs. Comparing suppliers regularly can help identify potential savings, particularly when an existing fixed-rate contract is approaching its end.

However, switching energy suppliers does not automatically guarantee lower bills. The financial benefit depends on unit rates, standing charges, estimated annual consumption, contract conditions and the tariffs available.

In Great Britain, domestic customers can generally change their gas or electricity supplier without interrupting their energy supply.

Fraser Bond, a UK property agency and real estate consultancy, supports homeowners, tenants, landlords and property investors with residential sales, lettings and property management across London and the wider UK.

This guide explains how to switch energy suppliers, how long the process takes, potential costs, tenant rights, moving-home arrangements and important considerations when comparing gas and electricity tariffs.

What Does Switching Energy Supplier Mean?

Switching energy supplier means transferring an electricity or gas account from one energy company to another.

For example, a household currently supplied by British Gas may choose to move to Octopus Energy, EDF Energy, E.ON Next or another provider offering a suitable tariff.

The electricity cables and gas pipes supplying the property normally remain unchanged.

Only the company responsible for supplying and billing the energy changes.

Customers may switch both gas and electricity together or use different suppliers for each fuel.

Can You Switch Energy Supplier in the UK?

Yes. Most domestic energy customers in Great Britain can choose their electricity and gas suppliers.

Customers may switch because they want a cheaper tariff, improved customer service, renewable electricity options or different billing arrangements.

However, the rules and available suppliers differ in Northern Ireland, where the energy market operates under separate arrangements.

Customers should also check whether they are responsible for paying the supplier directly, particularly when renting accommodation with energy included in the rent.

How to Switch Energy Supplier - Step-by-Step Guide

Switching energy suppliers is usually straightforward, and most domestic customers do not need to contact their existing provider to arrange the transfer.

Step 1 - Check Your Current Energy Tariff

Review a recent gas or electricity bill to identify your current supplier, tariff name, unit rates, standing charges and annual energy consumption.

You should also check whether your contract is fixed or variable and whether early exit fees apply.

Step 2 - Compare Energy Suppliers

Compare available tariffs using your actual annual consumption wherever possible.

Important factors include:

• Electricity and gas unit rates.

• Daily standing charges.

• Estimated annual cost.

• Fixed or variable pricing.

• Contract duration and exit fees.

• Customer service and complaints performance.

• Payment methods.

• Smart meter compatibility.

The cheapest tariff for one household may not be the cheapest for another.

Step 3 - Choose Your New Supplier

Once you have identified a suitable tariff, contact the new supplier directly or complete the application through an energy comparison service.

You will usually need your postcode, current supplier details and estimated annual consumption.

Step 4 - Confirm Your Switching Date

Your new supplier will arrange the transfer and notify you of the expected switching date.

You normally do not need to cancel your existing energy account yourself.

Step 5 - Submit Your Meter Reading

Take an electricity and gas meter reading on the switching date, unless your supplier confirms that suitable readings have been obtained automatically.

Keep a record of the readings to help prevent inaccurate final bills.

Step 6 - Check Your Final Bill

Your previous supplier should issue a final bill after the transfer.

Check that it reflects the correct meter readings, payments and outstanding balance.

Any remaining credit should be refunded in accordance with the applicable rules.

How Long Does It Take to Switch Energy Supplier?

In Great Britain, a domestic energy supplier switch should normally be completed within five working days of the relevant switching request.

Customers can also choose to wait until after their 14-day cooling-off period before completing the transfer.

Where a supplier fails to meet the applicable switching standard, compensation may be payable.

For qualifying delays, the standard automatic compensation amount is £40.

Is It Free to Switch Energy Supplier?

Switching is generally free when there are no applicable early termination charges.

Customers on standard variable tariffs can normally leave without paying an exit fee.

However, fixed-rate contracts may include charges for leaving before the agreed end date.

Customers should check the expected savings against any potential fees before switching.

Energy Supplier Exit Fees Explained

Exit fees are charges that may apply when a customer ends a fixed energy contract early.

The amount depends on the contract.

Some suppliers charge a fee for each fuel, meaning a household switching both electricity and gas could face two separate charges.

Customers with 49 days or fewer remaining on a qualifying fixed domestic energy tariff can normally switch without paying an exit fee.

Fixed vs Variable Energy Tariffs

A fixed tariff provides certainty over unit rates and standing charges, but not the total bill.

The total amount paid still depends on energy consumption.

How to Compare Electricity and Gas Prices

Energy bills generally include two main charges.

Unit rate: The amount paid for each kilowatt-hour of electricity or gas consumed.

Standing charge: A daily charge that applies regardless of how much energy is used.

For example, consider two illustrative electricity tariffs.

A household consuming 2,700 kWh of electricity annually would pay approximately:

• Tariff A: £875.75 per year.

• Tariff B: £858.25 per year.

In this example, Tariff B is £17.50 cheaper annually despite its higher standing charge.

These figures are hypothetical and do not represent current supplier quotations.

Can You Switch Energy Supplier with a Smart Meter?

Yes.

Having a smart meter does not normally prevent customers from switching suppliers.

However, some older smart meters may temporarily lose certain smart functions after a transfer.

Where this happens, customers may need to submit manual meter readings until smart functionality is restored.

Modern compatible smart meters should generally continue operating after switching.

Can You Switch Energy Supplier If You Owe Money?

Possibly.

Customers who have owed money for less than 28 days can generally switch, with the outstanding balance included in their final bill.

Where qualifying debt has remained unpaid for longer than 28 days, the existing supplier may be able to prevent the switch.

Different rules apply to prepayment meters.

Customers experiencing payment difficulties should discuss affordable repayment arrangements with their supplier.

Switching Energy Suppliers with a Prepayment Meter

Customers with prepayment meters can generally compare and switch suppliers.

Where debt is being recovered through a prepayment meter, switching may still be possible if the qualifying debt does not exceed £500 per fuel.

The new supplier may arrange for the debt to transfer under the relevant procedures.

Customers should confirm the applicable terms before switching.

Can Tenants Switch Energy Supplier?

Yes, in many circumstances.

Where a tenant is directly responsible for paying gas or electricity bills, they can generally choose their energy supplier.

This applies to many private rented properties across London and the wider UK.

However, tenants should review their tenancy agreements for relevant notification or end-of-tenancy provisions.

If the landlord pays the supplier directly and includes energy costs in the rent, the tenant generally cannot switch the account independently.

Can a Landlord Stop a Tenant Switching Energy Supplier?

Where a tenant is directly responsible for paying the energy supplier, the landlord generally cannot prevent them from choosing a supplier.

A tenancy agreement may contain certain provisions about notifying the landlord or managing the supplier at the end of the tenancy.

However, contractual terms cannot simply remove statutory consumer protections.

Landlords and letting agents should distinguish between supplier choice and responsibility for the property's energy bills.

Switching Energy Supplier When Moving House

Moving home is a common opportunity to review energy tariffs.

When leaving a property, customers should notify their existing supplier and provide final meter readings.

When moving into a new home, they should identify the existing supplier and take opening meter readings.

The new occupier is normally supplied initially under the existing arrangements until they select another tariff or supplier.

Energy Switching Checklist for Homebuyers

When purchasing a property, buyers should confirm the gas and electricity meter locations, identify the existing suppliers and record readings on completion.

They should also check whether the property has a smart meter, prepayment meter or communal heating arrangement.

A property with a heat network may not offer the same supplier-switching options as a home with an individual gas boiler.

Switching Energy Supplier in a Rented Property

Tenants moving into a new rental property should establish who pays the energy bills.

Where energy is not included in the rent, tenants should contact the existing supplier promptly.

Opening meter readings can help distinguish their consumption from that of previous occupants.

Fraser Bond supports landlords and tenants through residential lettings and property management services across London.

Can You Switch Energy Supplier in a Flat?

Yes, provided the flat has an individual energy supply account and the occupier is entitled to choose the supplier.

However, some apartment buildings use communal heating or heat networks.

In these buildings, the occupier may not be able to select a separate heating supplier.

Electricity supplier choice may still be available where the flat has its own electricity meter and account.

Switching Energy Supplier for Landlords

Landlords may be responsible for energy accounts during vacant periods or where bills are included in the rent.

Reviewing tariffs can help control property operating costs.

However, landlords should consider whether the energy contract is domestic or commercial and ensure that tenant rights are respected.

For portfolios containing multiple properties, maintaining accurate supplier records and meter readings can simplify administration.

Switching Business Energy Suppliers

Commercial energy contracts differ from domestic arrangements.

Business customers may face different contract lengths, notice periods and termination charges.

They do not necessarily benefit from the same cooling-off and switching compensation protections available to domestic customers.

Commercial landlords and property managers should review contract terms carefully before arranging a transfer.

Does Switching Energy Supplier Affect Your Credit Score?

Switching energy suppliers does not automatically damage a customer's credit score.

However, some suppliers may conduct credit checks when assessing eligibility for particular payment arrangements.

Outstanding energy debts, missed payments or defaulted accounts may also affect credit records where they are reported.

Customers should review the terms of the new supplier's application process.

What Happens If Your Energy Supplier Goes Bust?

In Great Britain, Ofgem has procedures to protect customers when an energy supplier stops trading.

Affected customers are normally transferred to a new supplier under the Supplier of Last Resort process.

Gas and electricity supplies should continue without interruption.

Customers can review alternative tariffs once the transfer arrangements have been established.

Can You Cancel an Energy Supplier Switch?

Yes.

Domestic customers generally have a 14-day cooling-off period after agreeing a new energy contract.

During this period, they can cancel the switch without an early termination charge.

If the transfer has already taken place, the supplier should explain the available options for returning to the previous supplier or selecting another arrangement.

How to Complain About an Energy Supplier Switch

Customers who experience billing errors, unexpected transfers or switching delays should contact the supplier responsible.

Keep copies of correspondence, bills, meter readings and confirmation messages.

Where the complaint remains unresolved, the customer may be able to escalate the matter through the relevant energy complaints process.

Qualifying switching errors and delays may attract automatic compensation.

How to Reduce Energy Bills Without Switching Supplier

Changing supplier is not the only way to reduce household energy expenses.

Households may also benefit from reviewing their current tariff, improving heating controls, reducing unnecessary electricity consumption and addressing heat loss.

Property improvements such as loft insulation, draught-proofing and efficient heating systems can contribute to lower consumption.

Landlords considering energy efficiency improvements should also review their legal responsibilities and applicable minimum energy efficiency requirements.

Frequently Asked Questions About Switching Energy Suppliers

How do I switch energy supplier in the UK?

Compare tariffs, choose a new supplier, provide your account and consumption details, and allow the new supplier to arrange the transfer.

How long does switching energy supplier take?

A domestic switch should normally be completed within five working days of the relevant request, unless a later date is chosen.

Is switching energy suppliers free?

Usually, although early exit fees may apply to certain fixed-rate contracts.

Can I switch energy supplier before my contract ends?

Yes, but check whether an early termination charge applies. The final 49 days of a qualifying fixed tariff are normally exit-fee-free.

Can I switch if I have a smart meter?

Yes. Some older meters may temporarily lose smart functionality after switching.

Can I switch energy supplier if I owe money?

Sometimes. The rules depend on how long the debt has been outstanding and whether the customer uses a prepayment meter.

Can tenants change their energy supplier?

Generally yes, where they pay the supplier directly.

Can I switch both gas and electricity?

Yes. Customers can switch both fuels together or use separate suppliers.

Will my electricity or gas be disconnected during switching?

No. A normal supplier switch does not require interruption of the physical energy supply.

Can I cancel my energy switch?

Yes. Domestic customers generally have a 14-day cooling-off period.

Can I switch energy supplier when moving house?

Yes. You can review and change suppliers after moving into a property.

What happens if my energy supplier goes out of business?

Ofgem normally arranges a transfer to another supplier to maintain continuity of supply.

Switch Energy Supplier UK - Managing Household and Property Energy Costs

Switching energy suppliers can be an effective way to review household expenditure, compare tariffs and potentially reduce gas and electricity bills.

However, consumers should assess the full cost of a tariff rather than focusing only on advertised savings.

Unit rates, standing charges, exit fees, annual consumption and customer service are all important considerations.

For tenants, homeowners and landlords, maintaining accurate meter readings and understanding responsibility for energy accounts can help prevent disputes when moving property.

Regularly reviewing energy arrangements ca