Simple Guide to
Employee vs Independent Contractor

It's important to correctly determine whether the individuals providing services are employees or independent contractors.  The problem can come during an IRS audit of the business.  If the IRS determines that a person providing services is really an employee and not an independent contractor there can be serious consequences. The key difference is the degree of control over the work ... the more control over the worker the more likely it is that the IRS will classify the worker as "employee"

Employee Independent Contractor (IC) Key Questions to Ask
Disclaimer:  Worker classification has significant tax and legal implications, so it's wise to consult IRS guidelines or a legal professional for complex situations.