Lets talk about the cost of employment..Although I can't list everything because some things would be different due to number of employees and the state the employee is in. But, here are the obvious cost: Social Security, Medicare, FUTA and SUTA. Other payroll cost I view as 'Administration,' and those would be: Preparing your earning logs, calculating regular and OT, Tracking bonuses / holiday pay/ severance/ sick leave, I-9 compliance, W-4 records, issuing checks, payroll deposits, preparing quarterly/ annual reports, maintaining payroll records/ bookkeeping, W2/ year end reports. 
If you have a relationship with us, Management 2000 an Indiana PEO company, we would handle all these items along with paying local, state and federal taxes - reconciling accounts and giving you the reporting necessary to run your business. If you want a better way...outsourcing your payroll to PEO Group, Management 2000 at 800-554-5945 or catch us on the web www.management2000.com