How to switch business energy suppliers for commercial property businesses

For commercial property owners and landlords in the UK, energy contracts are often more complex than other business expenses. A single property may have multiple meters, landlord supplies for communal areas, or vacant units that temporarily fall back under the landlord’s responsibility. When you manage several buildings, energy contracts quickly become a portfolio management issue rather than a single utility bill. Business energy contracts require planning to switch. Suppliers set fixed contract terms and specific notice periods. If those dates are missed, properties are often moved onto expensive default tariffs. Understanding how commercial energy switching works can help property businesses reduce overheads and avoid unnecessary costs across their portfolio.

Understanding business energy contracts for commercial properties

Commercial energy contracts are structured differently from household energy deals. When a landlord or property company signs a contract, the agreement usually runs for a fixed term and cannot be cancelled early unless the property supply changes or the contract reaches its end date.

Most commercial properties will use one of two main contract types.

• A fixed-rate contract locks in the price per unit of energy and the daily standing charge for a set period, usually between one and three years. The total bill still changes depending on usage, but the energy price itself remains stable. For property owners responsible for communal areas such as lighting, lifts or heating systems, fixed contracts provide predictable operating costs.

• A variable contract allows the unit rate to move in line with wholesale energy prices. These contracts can sometimes result in lower prices if the market falls, but they expose property businesses to price increases if the market rises. Variable tariffs are often used temporarily when a property changes ownership or when a tenant vacates and the supply reverts to the landlord.

When commercial property owners can switch energy suppliers

Switching business energy suppliers is not something that can be done at any time. Commercial contracts include a notice period known as the renewal window. This is the time when a property owner can notify the supplier that they intend to switch or renegotiate the contract. The renewal window usually opens between one and six months before the contract end date, depending on the supplier and the contract terms. If no action is taken before the notice period closes, the supplier will normally move the property onto a rollover contract or an out-of-contract tariff. These default rates are usually much higher than negotiated fixed contracts and can significantly increase energy costs.

For landlords managing multiple properties, missing renewal windows can become expensive. Each building may have its own contract end date, so keeping track of these timelines is essential. Many commercial property businesses maintain a simple record of their energy contracts including the property address, supplier, contract end date, notice period and MPAN number. Having this information available makes it much easier to begin comparing suppliers before the switching window opens.

Switching energy for multi-property portfolios

Commercial landlords often manage several energy supplies across their portfolio. Each building, and sometimes each meter within a building, may have its own contract with a supplier. However, property owners do not always need to negotiate these contracts separately. Some suppliers offer multi-site agreements that allow several properties to be grouped under one energy contract.

For landlords with multiple properties, this can simplify energy management. Contracts can be aligned so that renewal dates fall at the same time, which makes it easier to review suppliers across the entire portfolio. Grouping several properties together can also increase total energy usage under the contract. Higher combined consumption can sometimes result in more competitive pricing than negotiating each property individually. When switching several sites at once, suppliers will normally request details for each meter including the meter numbers, estimated annual usage and the addresses of the associated properties.

Using an energy broker when switching suppliers

Many commercial property owners use an energy broker or intermediary to help compare energy prices and suppliers and negotiate contracts. In order for a broker to gather information from energy suppliers, the property owner will usually need to sign a Letter of Authority. This document allows the broker to access energy usage data and request quotes on behalf of the property business. Some Letters of Authority only allow the broker to collect information, while others may allow the broker to agree contracts directly with suppliers. Property owners should check the level of authority they are granting before signing the document to ensure they retain control over the final decision.

Regulations commercial property owners should consider

Energy regulation can also affect how landlords manage their energy supply. The Minimum Energy Efficiency Standards require commercial properties to meet a minimum EPC rating before they can be legally let. Improving the energy efficiency of a building can therefore be an important part of managing long-term operating costs and maintaining lettable space. In addition, the wider rollout of smart meters and half-hourly energy settlement is improving the accuracy of commercial energy billing. For landlords managing communal supplies or vacant units, more accurate data helps ensure bills reflect actual usage rather than estimates.

Managing energy switching across a property portfolio

Switching your energy supplier is also a good time to understand how suppliers assess your business before offering a contract. Many business energy suppliers run credit checks when providing quotes, especially for fixed-term contracts. They use this information to assess the risk of supplying energy to your business over the length of the agreement. A stronger business credit score can help you access longer fixed contracts and more competitive pricing. If a company has a weaker credit profile, suppliers may ask for a security deposit, offer shorter contracts, or quote higher rates.

For commercial property owners, this can matter even more when switching energy across several buildings or negotiating multi-site contracts. A strong credit profile can give suppliers more confidence when offering terms across multiple meters or properties. Before agreeing to a new contract, it can help to check your business credit score and see how suppliers may view your business. Through your Capitalise account, you can monitor your business credit score and understand the factors that may affect the contracts suppliers are willing to offer.