Productivity Check is a tool to estimate the amount of productive time employees spend on work.
When calculating an employee's cost, there is much more to it that just salary. Taxes and benefits typically add another 18% to 26%. But what many people fail to include there's also the cost of equipment, space, recruiting, training, management's time, and many other economic forces.
There's also intangibles like the addition (or detriment) to company morale and culture.
All in all, an employee probably costs an employer 2 to 3 times their salary.