Most agencies start with a spreadsheet. Someone builds it on a Friday afternoon, adds a tab for each month, shares it with the team, and it works for a while.
At 10 people, a leave spreadsheet is fine. You know everyone. Requests come in over Slack/Teams. You update the sheet. Done.
Then your team grows. You hire a couple of part-timers. Someone takes sick leave mid-week. A person carries over days from last year. A manager approves a request but forgets to update the sheet. Another manager checks the wrong tab.
By the time you hit 30 people, the spreadsheet is no longer tracking leave. It is tracking the last time someone remembered to update it.
Where it starts to break
Approvals happen in WhatsApp threads, email, and Slack DMs. There is no record. Nobody can check whether a request was actually approved or just discussed.
Balances become uncertain. People ask HR what they have left. HR checks the sheet, does the maths, and hopes the carryover column is correct. Often it is not.
Visibility disappears. A manager wants to know who is off next week. The sheet does not answer that question cleanly — not when sick days, annual leave, bank holidays, and part-time patterns all need accounting for.
The founder or ops manager ends up spending Friday afternoons fixing the spreadsheet instead of running the business.
The 30-person threshold
Ten people is manageable by memory and Slack. Thirty people is not. At that scale, leave management needs a system — not because your team is now corporate, but because the complexity of approvals, balances, visibility, and compliance has outgrown what a spreadsheet was built to do.
This is not about adding HR overhead. It is about removing admin from people who should not be doing it.
What simple leave management looks like
Employees submit leave requests in one place. Managers approve or reject them with the team calendar in view. Balances update automatically. Everyone can see what they have left without asking anyone.
No spreadsheet. No Slack thread. No Friday afternoon admin.
Teamper is built for exactly this. Simple leave management for UK small businesses. You can move off the spreadsheet in a day.
Still checking leave balances by hand? Teamper helps small businesses move from spreadsheet to simple leave management in one day.