Excel is an honest tool. Almost every small business starts tracking leave in a spreadsheet — one sheet, a few rows, a few formulas, done. For two or three people it works perfectly. Then comes the fourth colleague, the fifth, shift swaps, sick days, half-days, emails, the "did you already book that week?" conversations — and one morning you open the file and you're no longer confident it's accurate.
This guide covers where Excel breaks down, what a healthy leave management process actually looks like, and what small teams should look for when they switch.
Why most small businesses start in Excel
The reason is obvious: Excel is already there, everyone knows it, and a working template takes an afternoon. No registration, no monthly fee, and for the first few months it genuinely is enough. Most small companies don't go looking for a better solution — Excel isn't just adequate, it's flexible. You can add your own columns, your own formulas, your own color codes.
That flexibility is also the trap. The more custom rules you pack into the file, the more fragile it becomes. One broken formula, one accidental delete, one typo — and the whole thing loses its reliability, usually at the worst possible moment.
When does Excel start to fail?
Multiple people editing at once
As long as one person manages the file, Excel is fine. The moment Péter fills in his row while Ági is also making changes, you get version conflicts or silent overwrites. Google Sheets helps somewhat, but concurrent editing and intentional, non-destructive record-keeping are two different things.
Overlapping leave and capacity limits
If three people go on holiday in the same week and that's a problem, Excel won't flag it. There's no automatic alert, no limit, no warning. Someone has to manually scroll through the rows and count — and that's exactly the task everyone puts off because it's tedious.
The approval process
Excel can't approve anything. If a manager's sign-off is required, that happens over email, Slack, or in person, and someone writes the result back into the spreadsheet. Transparency is lost: who approved it, when, and was there actually a conversation? "Yeah, fine" in Slack is not an auditable record.
History and traceability
Six months later you look back: when was Béla on leave? Which request did the manager approve? What was the rejection reason? Excel can't answer that unless someone diligently logged every decision in a cell note — which almost never happens.
Broken formulas and forgotten updates
The balance formula was updated for Q1 but forgotten in Q4. A name mismatch means SUMIF doesn't count someone's days. This year's allowance differs from what the template contains. These are errors that sit invisibly in the spreadsheet until someone discovers them, usually at a bad moment.
Calendar sync
Excel doesn't appear in Google Calendar. If the team needs to see who's out — so they don't schedule a meeting on that day — every event has to be entered manually. Or nobody enters it, and Monday's standup reveals that half the team is on holiday.
What does a healthy leave management process look like?
A well-functioning process has five steps that follow each other automatically:
- The employee submits a request — provides dates, type (annual leave, sick leave, unpaid leave, etc.) and an optional note.
- The responsible manager is notified and decides — approves or rejects; if rejecting, provides the reason.
- The employee is notified of the decision — by email, immediately.
- Approved leave appears on the team calendar — everyone can see who is out and when, without logging into a separate system.
- Everything is traceable — who submitted, when, who approved, what the reason was — in one place, years later.
Of these five steps, Excel covers step one (in a cell). The other four don't exist.
Excel vs. a dedicated leave management system
| Aspect | Excel / Google Sheets | Dedicated system |
|---|---|---|
| Setup time | Instant | A few hours – 1 day |
| Submitting a request | Manual cell entry | Online form, works on mobile |
| Approval process | Email/Slack, then write it back | Built-in, tracked |
| Who approved | Not recorded | Team leader or admin, stored |
| Notifications | None, or manual | Automatic email |
| Team calendar | None (manual calendar entries) | Real-time, synced |
| Google/Outlook/Apple sync | None | ICS feed, automatic |
| Leave balance | Formula, error-prone | Automatic calculation |
| Rejection reason | Not stored anywhere | Recorded on the request |
| Auditability | Minimal | Full history |
| Scalability | Comfortable for 2–5 people | 5–500+ people |
What should a small team look for when switching from Excel?
Leave types that match reality
Every company has its own categories: annual leave, sick leave, unpaid, work-from-home day, personal day. Check whether the system lets you create custom leave types and whether they're tracked separately in the balance — because sick leave isn't the same as annual allowance.
Approval that fits your team structure
For small companies, the right setup is usually direct-line approval — not the HR manager, not the founder. Look for a system where the approver is configurable per team, and where auto-approval can be turned on for teams where tracking matters but formal sign-off doesn't — senior staff, leadership, or anywhere leave is treated as a notification rather than a negotiation.
Calendar sync that works once and stays synced
Leave is most useful when it automatically appears in the calendar your team already uses. Make sure the system can generate an ICS feed that Google Calendar, Outlook, and Apple Calendar subscribe to and refresh automatically. Set it up once, then forget about it.
Don't pay for features you don't need
A 10-person company doesn't need payroll integration, a full HR module, or performance reviews. It needs: request submission, approval, team calendar, balance. The system should do that well — the rest can wait until it's actually needed.
A simple one-week rollout plan
Day 1: Register, create the organization, configure leave types.
Day 2: Add team members, create teams, assign team leaders.
Day 3: Set annual leave allowances for each person; enter current-year balances if you're mid-year.
Day 4: Run a test: one colleague submits a request, you approve it, check the email arrives and the calendar updates.
Day 5: Create the ICS calendar feed for the team, share the link — each person subscribes their calendar once.
Days 6–7: Collect feedback, adjust the team structure to match reality, decide whether any team needs the auto-approval bypass.
Done in a week. The Excel file can stay on the drive as a memory — but nobody needs to open it again.
How Collabin can help
Collabin is a leave management tool built for small and medium-sized teams. Here's what's confirmed from the actual product:
Leave requests and approval: An employee submits a request, which first waits for approval; a team leader or admin then accepts or rejects it. On rejection, the reason is stored on the request and visible to the employee. Half-day requests are supported. The full leave approval flow is covered in detail here — who can approve, what happens when someone belongs to multiple teams, and when approval is skipped entirely.
Auto-approval: Each team has a "Bypass approval" toggle for situations where tracking matters but formal sign-off is unnecessary. On the Collabin Free plan, every request is automatically approved — you still get the shared calendar and history, just no approval gate.
Team calendar and ICS sync: Approved leave immediately appears in the in-app calendar. ICS calendar sync lets you connect the team calendar to Google Calendar, Outlook, and Apple Calendar — personal, team, or company-wide scope, set up once.
Leave types and balances: Custom leave types with names, calendar colors, and flags (sick, unpaid). Annual allowances and carried-over days from the previous year are both tracked.
Notifications and integrations: Automatic email notifications at every decision point. If you need Slack notifications too, webhook-based integration is available.
Reports: All leave data can be queried and exported to Google Sheets — if you still need a spreadsheet, it can be a self-updating one.
The Free plan is available straight after registration: Sign up free
Summary
Excel isn't a bad tool — it's just not the right tool for this. If your team is more than four or five people and managing leave involves emails, Slack messages, or manually updated spreadsheets, you're probably spending more time on the bookkeeping than the task deserves.
A dedicated system removes the manual burden that comes with Excel: no more version conflicts, no more "did you approve this?" emails, no more manual calendar entries, no more broken formulas.
Checklist: when is it time to switch?
- More than five people need to track leave
- Approvals happen over email or Slack
- Two people have overlapped on leave without anyone noticing
- Calendar sync is manual or doesn't exist
- There has been a balance calculation error
If two or more of these are true, the time to switch is now — not when Excel finally collapses.