You need money to grow a business! Capital can come from many sources, including personal savings. However, borrowing money from a lender is a primary source of capital, as is raising equity capital from an investor. Many resources are available to help guide a business owner to the best options for financing growth.

Financial Management For The Growing Business
A guide from the SBA :

• Borrowing Money 
  What to consider before you borrow money.
• SBA Loan Programs 
  The SBA offers a range of loan options for almost every type of business.
• SBA's 7(a) Loan Program
  Details on the SBA's most basic type of loan. 
• Prequalification Programs 
  For some programs, a business must prequalify for participation.
• Microloans
  SBA's program to give very small loans.
• Capital Alternatives
  Options and possible alternatives for your business' need for capital. 
• Certified Development Company (504) Loan Program
  SBA's program for long-term financing to a non-profit Certified Development Company to support economic growth within a community. 
• Equity Financing
  Explanation of equity financing, including venture capitalists. 
• Small Business Investment Companies (SBIC) 
  SBA-approved, private-public partnerships helping small businesses succeed in today's environment.