Timesheets make a good first automation. The work repeats every week, the rules are clear, and mistakes are expensive: a missing timesheet delays payroll, and a wrong one ends up on an invoice. We run a timesheet workflow in n8n ourselves and build workflows like it for clients. Here is how it works, with example numbers for a team of 40.
Before: the manual week
For 40 people logging hours weekly, one coordinator can easily spend about 9 hours a week:
- Collecting timesheets from email and forms: about 3 minutes each, around 2 hours.
- Chasing late ones: around 8 a week at 10 minutes each, over an hour.
- Checking hours against schedules and flagging overtime: about 2 hours.
- Compiling one sheet for payroll and invoicing: about 2 hours.
- Corrections and approvals: about 1.5 hours.
The build
Built in n8n, with a form and a Google Sheet:
- Every Friday, each team member gets a timesheet form automatically.
- Answers land in one Google Sheet.
- On Monday morning, anyone missing gets a reminder.
- Rules flag missing days, hours above the agreed limit and entries that do not match the schedule.
- A summary per client is ready for payroll and invoicing.
- The approver gets one email listing only the exceptions.
A workflow like this can take around 20 hours to build and test, depending on the tools and rules involved. Where n8n and Google Sheets are already in use, it usually adds little or no running cost.
After
In this example, the coordinator's week drops to about an hour and a half: around 50 minutes on the handful of flagged timesheets, and about 40 minutes checking and approving the summary. That is about 7 hours back every week, or roughly 380 hours a year.
For scale, at the US cost of an administrative assistant (the US Bureau of Labor Statistics May 2025 median of $47,540, plus 30% for benefits, payroll taxes and recruiting, about $29.72 an hour), 380 hours is worth about $11,300 a year.
What a person still owns
- Approving hours before payroll runs
- Disputes and corrections
- Overtime decisions
- Late submissions around holidays and across time zones
The automation does the collecting, chasing and checking. The judgment stays with people.
The lesson
Automate the steps that repeat and follow rules, and keep a person on approval and anything that needs judgment. If a process takes hours every week and you can write its rules on one page, it is worth a look.
Your numbers will depend on team size, how hours are tracked today and how many exceptions come up. The figures above are an example, not a guaranteed result.
This article is general information, not legal, tax, payroll or employment advice.