Before you start a practice, there are a number of preliminary decisions to be made. One of the first choices you will face is the legal form in which you will operate the business. Should it be an unincorporated sole proprietorship, a partnership, a limited liability company, a regular corporation, or an S corporation? Each of these forms has both tax and non-tax advantages and disadvantages that must be weighed in conjunction with your own plans and personal situation.
Sole proprietorships, for example, are the easiest and cheapest business form to set up, and they can be operated with few formalities. However, they offer no personal liability protection and don't allow you to get many of the tax benefits that are available to corporate employees.
Partnerships offer many of the same advantages and disadvantages as the sole proprietorship, but they allow the business to be owned and run by more than one person. Also, the liability problem can be overcome to a certain extent by forming a limited partnership. Under traditional tax rules, partners whose liability is limited cannot be involved in actively managing the business; however, the IRS is reconsidering these rules. Losses from these partnerships may be restricted by the so-called passive activity rules.