Cost to hire an employee?

Is there a ratio business managers should use when calculating cost to hire an employee. For example, if I want to hire someone at 60,000/year, should I slate an extra 15% for payroll taxes, social security, health/dental, and all the other costs that come associated with managing an employee. Or perhaps and extra 50%, or 100%?

Cost to hire an employee?
In our business the actual cost comes out to be about 50% more than the salary. This includes employer portion of taxes, fringe benefits, etc.
Reply:Also, consider what else you will need for the person: a desk, a computer, a telephone, electricity, workmen's compensation, office supplies, uniforms, safety equipment, parking space, etc., depending on the job and location.