What are timesheets? Timesheets are forms that record the number of hours worked of all hourly employees. The number of hours in timesheets are recorded from time clocks for employees to punch in and punch out. Why are timesheets needed? It is important to have accurate timesheets and a clock-in system to prevent time theft and make timely payments. Automating timesheetswith a digital time clockwill eliminate errors and reduce time spent scheduling shift workers.