If you own the business entirely by yourself and plan to be responsible for all debts and obligations, you can register for a sole proprietorship. Be warned that this route can directly affect your personal credit. Alternatively, a partnership, as its name implies, means that two or more people are held personally liable as business owners. You don't have to go it alone if you can find a business partner with complimentary skills to your own.
Traditional bank options include term loans, lines of credit and commercial mortgages to buy properties or refinance. Through banks, the U.S. Small Business Administration provides general small-business loans with its 7(a) loan program, short-term microloans and disaster loans. SBA loans range from about $5,000 to $5 million, with an average loan size of $371,000.