How to estimate your event workload
The committee agreed the plan, and nobody has yet asked whether the same few volunteers have the hours to do it.
The short answer
List the tasks, give each an hour estimate and an owner, then place those hours in the months they fall due. Compare them with the hours each person can realistically give, after their day job and other commitments.
Where required hours exceed available hours, you have a gap. Decide whether to cut scope, move dates, share the work or bring in help before the gap turns into missed deadlines.
Count work, not people
A committee of twelve does not have twelve people's worth of hours. Most members are volunteers or staff with full workloads, and a few carry most of the load.
Start from the tasks. Use the work breakdown as the list, so that nothing needed is missing and nothing is counted twice.
Estimate hours per task
- Ask the person doing the task for a range, and keep the likely figure.
- Include coordination: meetings, chasing replies, reviewing other people's work.
- Keep effort separate from elapsed time; a task can be four hours of work spread over three weeks. See task duration estimates.
- Mark tasks nobody has claimed, since they carry hours that nobody has.
Set availability honestly
Ask each person how many hours per month they can give to the event, by month, not as an average. Include leave, other events, quarter-end or audit periods and busy seasons for their own work.
Treat a stated availability as a ceiling, not a target. Anyone at their ceiling for several months running is a risk.
Read the gap
| Pattern | What it usually means | Typical responses |
|---|---|---|
| One person far above availability | Work concentrated on the person who volunteered most | Reassign tasks, split roles, write down handover |
| Everyone busy in the same month | A shared peak, such as programme closing and invitations together | Move tasks earlier, remove or defer non-essential work |
| Unassigned hours | Tasks with no owner | Assign or drop; do not leave them to chance |
| Specialist work with no one qualified | Skill gap, not hours | Appoint a supplier or adviser for that task |
Pitfalls
- Counting volunteer hours as free. They are still limited and they are still a cost to someone's other work; the internal effort cost calculator shows this as an opportunity cost, separate from cash spend.
- Assuming one person can cover tasks that happen at the same time.
- Estimating once and never updating. Review monthly against actual hours.
- Hiding the gap because the answer might be to hire help.
Worked example · Fictional example
A committee workload check three months out
Fictional organisation and figures. Hours are hypothetical and show only how the comparison works.
A fictional professional society's secretariat compares required and available hours for the month before its conference. Three people carry most of the work, and one has a quarterly reporting deadline that month.
| Person | Required hours | Available hours | Gap |
|---|---|---|---|
| Secretariat officer | 42 | 40 | 2 over |
| Honorary secretary | 30 | 20 | 10 over |
| Programme chair | 18 | 20 | none |
| Treasurer | 12 | 6 | 6 over |
| Unassigned tasks | 14 | 0 | 14 over |
Use this yourself
Workload estimate worksheet
Copy this into a sheet and complete one block per month. Required hours come from your task list; available hours come from each person, in writing.
- List every task with an owner, a due month and an hours range.
- Ask each person for their availability for each month.
- Mark gaps, then agree which of four responses applies: cut, move, share, or buy help.
| Person or role | Month | Required hours | Available hours | Gap | Main tasks | Response agreed |
|---|---|---|---|---|---|---|
Handle it in-house, or bring in help?
Your team can usually handle this when
- The gaps are small and the committee is willing to move or drop tasks.
- Every task has an owner who has said what they can give.
- Someone can update the sheet each month.
Outside planning help earns its fee when
- The gap is large or concentrated on one or two people.
- A shared peak month cannot be moved because of a fixed date.
- You need a neutral party to reallocate work between committee members.
Gap found and nobody has the hours?
A conference project lead can take on a defined part of the coordination, with the scope agreed in advance, so that the committee keeps the decisions and the load drops where it is highest. Bring the worksheet; it shows what could be handed over and what must stay with you.
Questions organisers ask
How accurate does the estimate need to be?
Accurate enough to show where the large gaps are. A rough range that is reviewed monthly is more useful than a precise figure made once.
Should volunteer hours be counted?
Yes, as time, not as cash. Volunteers have limits like anyone else, and their hours should sit in the same plan.
What if the gap is bigger than we can fix by moving tasks?
Then scope or date has to change, or help is needed. The capacity gap estimator separates specialist gaps from ordinary hours, which helps decide what kind of help.
Related resources
Content record: Draft. Written from the cited sources and checked by automated rules; not yet independently reviewed.