Starting an appliance repair business can be a highly profitable venture, but laying down a proper legal foundation is crucial before you handle your first toolkit. Your first major decision is choosing a business structure, which dictates how you are taxed, your administrative workload, and how much personal risk you take on. The four primary legal structures to consider are Sole Proprietorships, Partnerships, Corporations, and Limited Liability Companies (LLCs).

A Sole Proprietorship is the simplest structure; it requires minimal paperwork, but it offers absolutely no separation between your personal life and your business. If your business is sued or falls into debt, your personal assets—like your home or savings—are at risk. A Partnership shares this risk among two or more owners. At the other extreme, a Corporation offers strong protection but demands complex record-keeping, strict corporate formalities, and heavy tax administration.

To officially form an LLC, you must file documents called Articles of Organization with your state's business filing office (usually the Secretary of State) and pay a registration fee. Once registered, you must obtain an Employer Identification Number (EIN) from the IRS. Think of an EIN as a Social Security Number for your business. It is a free, nine-digit number that allows you to legally open a business bank account, hire employees, and file business taxes without using your personal Social Security Number.