This article relies largely or entirely on a single source. (March 2012)
A timesheet (or time sheet) is a method for recording the amount of a worker's time spent on each job. Traditionally a sheet of paper with the data arranged in tabular format, a timesheet is now often a digital document or spreadsheet. The time cards stamped by time clocks can serve as a timesheet or provide the data to fill one. These, too, are now often digital. Timesheets came into use in the 19th century as time books.
Originally developed for an employer to calculate payroll, timesheets can also be used for management accounting. Timesheets may record the start and end time of tasks or just the duration. It may contain a detailed breakdown of tasks accomplished throughout the project or program. This information may be used for payroll, client billing, and increasingly for project costing, estimation, tracking, and management. 
Some companies provide web-based timesheet software or services that provide a means to track time for payroll, billing and project management. One of the major uses of timesheets in a project management environment is comparing planned costs versus actual costs, as well as measuring employee performance, and identifying problematic tasks. This knowledge can drive corporate strategy as users stop performing or reassign unprofitable work.
Factory workers may often have a "time card" (also known as punch card) and "punch in" by inserting their card into an automatic timestamp machine (called a time clock or bundy clock) when starting and ending their work shift, though other card technologies such as swipe cards have become more prevalent.
Time tracking can increase revenue through automating billing, which tends to make it easier for a company to get correct invoices out for all hours worked by consulting staff. This speeds up payment and eliminates the hassles of 'dropping' bills.
By lowering costs in three ways, and increasing revenue in one way, timesheet management technologies that are web-based can improve the health of companies.
In project management, timesheets can also be used to build a body of knowledge about how much effort tasks take to develop. Machine learning is being used to automatically find patterns in timesheets — then using this information to recommend more accurate project plans in the future. For example, if developing a training plan has historically taken a month, then it can be assumed that creating a new one will take a month. Also, most timesheet software has the ability to track resource costs and project expenses to allow for better future budgeting.
For the HR function, the time spent on activities by individuals can be analyzed over a period of time and categorized into broad types. Based on the outcome roles could be realigned.
|Look up time sheet or timesheet in Wiktionary, the free dictionary.|
- Comparison of time tracking software
- Schedule (workplace)
- Time clock
- Log book
- Time-tracking software
- Time and attendance
- Time management
- "6 Reasons to Adopt Mobile Timecards- eSUB Construction Software". eSUB Construction Software. 2017-02-23. Retrieved 2017-03-24.
- Measuring Project Health Neville Turbit, January 1, 2008
- "Timesheet – its purpose, use and importance". itknowledgeexchange. Retrieved 19 December 2014.