Capacity Planning for Small Teams: It Really Can Be This Simple
"Capacity planning" sounds like something for organizations with a planning department and a full-time resource manager. Nonsense: small teams actually benefit the most, because one sick colleague or one project running long instantly takes out 20% of their capacity. The good news — for a team of 5 to 25 people, capacity planning isn't a project. It's a habit built on three numbers per person per week.
The whole plan in one formula
Available = contract hours − leave − fixed commitments.
That's all there is to it. If you know, per person per week, (1) how many hours their contract covers, (2) how much leave has been approved and (3) what's already locked in on the calendar, you know exactly how many hours are left to plan. Put planned project allocation next to that and you see at a glance who's overloaded and who has room.
Everyone knows the classic alternative — a spreadsheet with color coding — and it always fails on the same three points: leave lives in another system, contract hours change without the planner hearing about it, and nobody sees the hours already logged. So the plan says "40 hours available" while reality says 24.
Set it up in an afternoon
Step 1 — record contract hours. Hours per week for each person, including part-time days. This is your baseline; in Horixa HR, the schedule follows contract changes automatically.
Step 2 — let leave live in the same system. Approved leave should come straight off available capacity, with no manual copying. Leave in a separate system (or an inbox) is the number one cause of double-booked weeks.
Step 3 — connect the calendar. Recurring meetings, client calls, teaching days: whatever is locked in on the calendar is not flexible capacity. An iCal integration that automatically counts calendar events as occupied time saves the planner a puzzle every week.
Step 4 — plan by week, not by day. Daily planning is false precision you'll revise within 48 hours anyway. Weekly blocks per project ("Anna: 16 hours project X, 8 hours project Y") are robust, quick to fill in and readable for everyone. A planning board looking 6 to 8 weeks ahead is more than enough horizon for a small team.
Step 5 — spend 15 minutes a week looking ahead. One fixed moment (Monday morning works best) where you answer two questions: who is over 100% in the coming weeks, and who has gaps? A small team doesn't need any more meeting time than that.
The two numbers you steer by
Utilization rate — planned hours divided by available hours. Healthy is 80 to 90%: below that, margin leaks away; above it, the first setback already lands in overtime. Consistently planning at 100% isn't tight management — it's burnout on layaway.
Plan versus actuals — what was actually logged against what was planned. If a project consistently deviates by more than 20%, the problem isn't execution but estimation — and that's valuable input for your next quote.
What you get out of it
For small teams, the payoff of capacity planning lands in three places: you see gaps in utilization weeks ahead (plenty of time to pull work forward or start selling), overload becomes visible before someone burns out, and the eternal question "can we take on this job?" gets answered with numbers instead of gut feeling. Teams that move from spreadsheet to system also win back the planner's hours: merging leave, contracts and calendars — previously manual work — happens automatically.
Frequently asked questions
At what team size does capacity planning become worthwhile? From about five people. Below that, the overview usually fits in one person's head; above it, it doesn't — and every planning mistake immediately shows up in revenue or workload.
How far ahead should I plan? For teams up to 25 people: 6 to 8 weeks in detail, then only rough blocks. Planning further ahead gives false certainty — projects shift anyway.
Should I plan by the hour or by the week? By the week. Hourly planning is high-maintenance and outdated after two days; weekly blocks per project are precise enough to monitor utilization and budgets.
How do I handle non-billable work in the plan? Reserve it explicitly: a fixed block per week for internal work, business development and admin. Whatever isn't planned gets squeezed out by client work — until it comes back to bite you.
Capacity planning without the spreadsheet? Try Horixa free for 14 days — a planning board per team member with contract hours, leave and calendars factored in automatically.