A company may enter into a contract that appears civil on its face, such as purchasing office furniture, leasing a warehouse, or contracting with a technology service provider. However, that contract may acquire a commercial character if it is connected to the company’s activity and the needs of its business. Here, an important concept in commercial law appears: commercial acts by accessory. This is one of the most practically influential concepts in corporate contracts, because it reveals that the characterization of an act is not always determined by its abstract nature alone, but by its connection to commercial activity.

Commercial acts by accessory are acts that are not commercial by nature if viewed in isolation, but become commercial because they are carried out by a merchant or company for the needs of its business. Purchasing a private car for personal use is not originally a commercial act. However, when a distribution company purchases vehicles to deliver its products, this falls within its commercial activity, not because purchasing a vehicle is always commercial in itself, but because it is accessory to the company’s trade and necessary for its operation.

The core idea here is that the act follows the activity it serves. If the act is connected to the commercial enterprise and is intended to support, operate, facilitate, finance, or protect it, it may acquire a commercial character by accessory. For this reason, corporate contracts cannot be evaluated from their titles alone; their context must be examined: Why did the company enter into this contract? What is its connection to the company’s activity? Does it serve its production, sales, supply, financing, or operations? Was it concluded for a commercial need or for a purpose separate from commerce?

Commercial acts by accessory appear in many forms within companies. Purchasing computers for employees of a technology company, contracting for an accounting system to manage the invoices of a commercial establishment, leasing a warehouse to store goods, contracting with a transport company to deliver orders, purchasing packaging materials, and contracting with a marketing agency to support store sales may all be acts accessory to commercial activity, even if some of these acts might appear civil if carried out by an ordinary person for a private purpose.

This classification is highly important when a dispute arises. One party may argue that the contract is not commercial because it is not one of the original commercial acts, while the company views the contract as part of operating its commercial activity. Here, the issue is not merely the name of the contract, but its connection to commerce. A contract that serves the company’s activity and affects its ability to sell, supply, collect payments, or operate cannot always be understood in isolation from the commercial environment in which it was concluded.

In practice, the concept of commercial acts by accessory helps companies build more precise contracts. When an establishment contracts with a technology service provider to manage its online store, the contract should not be drafted merely as an ordinary technology service, but as a service that affects sales, orders, customer data, and business continuity. When a company leases a warehouse, the contract is not merely about using the premises; it is also about preserving goods, managing inventory, and reducing the risks of damage or delay. When it contracts with a carrier, the relationship does not stop at the transport fee, but extends to delivery, liability, delay, and compensation for damage.

Therefore, it is not enough for a company to ask at the contracting stage: What type of contract is this? It must also ask: What function does this contract serve within the commercial activity? Does it support operations? Does it affect revenue? Is it connected to product delivery, customer management, inventory preservation, or activity financing? Would a breach of it disrupt part of the business? These questions help determine whether the act is an independent civil act or a commercial act by accessory.