As a contractor you also have to pay for most of your overheads, most notably insurance, training and any certifications. The company is also paying for the con

As a contractor you also have to pay for most of your overheads, most notably insurance, training and any certifications. The company is also paying for the convenience of a flexible workforce and specific expertise. It's also relatively easy to treat a contractor as capital expenditure which is often beneficial for the clients accounting.