Free internal resources for other purposes
Business owners who are great at their business but realize they are weak at finances or are too busy and don't have time to do the books or have tried but failed and as a result have a financial mess to clean up.
Resources are not available internally
Knowing what the finances really are at a given moment gives a small company the capability, for real-time and accurate decision making.
Improve company focus
By outsourcing non-core functions a small business owner can focus on growing the company.