So, your company has grown enough that you need to get a substantial line of credit or equipment financing or you are taking on new investment.  All of these could be reasons for you to “need” to have an audit done.  Banks and investors will normally require an audit.  If you are looking to go public, you need to have 3 years of audited financials.  One of the biggest stumbling blocks for companies seeking funding is the time and money it takes to get an audit completed, especially if they are not prepared for an audit.  Usually, it is best for you to prepare to be audited from the beginning.  Your business should already be ready for an audit.  Just because you haven’t “needed” an audit, is no excuse for not having your financial house in order and doing things right.  Doing things right will lead to more control and better information.  Better information leads to better decisions, which will lead to higher profits and eventually a higher valuation.  You have to have your financial house in order when you look for investment or a sale in order to maximize your valuation.