Act on the result
Compare the headcount gap with hiring, contractor and scheduling options.
Educational only: Business decision support, not accounting, tax or legal advice.
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Update policy: Reviewed when formulas or official dependencies change.
Scope: Market-neutral small-business planning using your own assumptions.
What this planner helps you decide
Best for
Service teams translating billable demand into delivery headcount.
Outputs
Billable capacity per person, required headcount and capacity gaps.
Start here
Enter demand, available hours and a realistic target utilisation.
Use a different tool when: Do not use this to align quote wins with delivery capacity; use Quote Win Capacity Planner for that decision. Use this tool to translate billable demand into headcount.
Quote & capacity
Utilisation to Headcount: billable capacity per person
Billable capacity per person, required headcount and capacity gaps.
Utilisation to Headcount
Translate billable demand into required delivery headcount.
Your numbers stay in this browser
Demand for the period.
Total working capacity.
Share available for billable work.
Current delivery team.
Decision result
Every result is derived by the registered service and project engine.
PDF and CSV exports stay on this device. Clean page links contain no inputs.
- Billable Capacity Per Person
- 120 hours/period
- Required headcount
- 9
- Headcount Gap
- 2
- Current Billable Capacity
- 840 hours/period
- Capacity Gap Hours
- 160 hours/period
Scenario comparison
Each row names the assumption axis changed from the baseline.
ScenarioResultDifference
Current scenario9Baseline
Lower Target utilisation9+0 (+0%)
Higher Target utilisation8−1 (−11.1%)
Save these results, change an input, then compare the updated figures with this baseline.
The baseline is temporary in this tab and is not added to shared scenario links or generated reports.
Calculation details
View calculation detailsView the formulas and inputs used for these results.
Required headcount
Required Headcount
ceil(required billable hours ÷ billable capacity per person)9 countResult9
Reports count from the entered project, capacity and ex-tax commercial assumptions. The engine retains full precision; presentation is bounded for readability.
Utilisation to Headcount Planner formulas →Inputs used by these formula steps
- Required HeadcountRequired Billable Hours
- 1,000
- Required HeadcountAvailable Hours Per Person
- 160
- Required HeadcountTarget Utilisation
- 0.75
- Required HeadcountCurrent Headcount
- 7
Billable Capacity Per Person
Billable Capacity Per Person
available hours per person × target utilisation120 hours/periodResult120 hours/period
Reports hours/period from the entered project, capacity and ex-tax commercial assumptions. The engine retains full precision; presentation is bounded for readability.
Utilisation to Headcount Planner formulas →Inputs used by these formula steps
- Billable Capacity Per PersonRequired Billable Hours
- 1,000
- Billable Capacity Per PersonAvailable Hours Per Person
- 160
- Billable Capacity Per PersonTarget Utilisation
- 0.75
- Billable Capacity Per PersonCurrent Headcount
- 7
Headcount Gap
Headcount Gap
required headcount − current headcount2 countResult2
Reports count from the entered project, capacity and ex-tax commercial assumptions. The engine retains full precision; presentation is bounded for readability.
Utilisation to Headcount Planner formulas →Inputs used by these formula steps
- Headcount GapRequired Billable Hours
- 1,000
- Headcount GapAvailable Hours Per Person
- 160
- Headcount GapTarget Utilisation
- 0.75
- Headcount GapCurrent Headcount
- 7
Current Billable Capacity
Current Billable Capacity
current headcount × billable capacity per person840 hours/periodResult840 hours/period
Reports hours/period from the entered project, capacity and ex-tax commercial assumptions. The engine retains full precision; presentation is bounded for readability.
Utilisation to Headcount Planner formulas →Inputs used by these formula steps
- Current Billable CapacityRequired Billable Hours
- 1,000
- Current Billable CapacityAvailable Hours Per Person
- 160
- Current Billable CapacityTarget Utilisation
- 0.75
- Current Billable CapacityCurrent Headcount
- 7
Capacity Gap Hours
Capacity Gap Hours
required billable hours − current billable capacity160 hours/periodResult160 hours/period
Reports hours/period from the entered project, capacity and ex-tax commercial assumptions. The engine retains full precision; presentation is bounded for readability.
Utilisation to Headcount Planner formulas →Inputs used by these formula steps
- Capacity Gap HoursRequired Billable Hours
- 1,000
- Capacity Gap HoursAvailable Hours Per Person
- 160
- Capacity Gap HoursTarget Utilisation
- 0.75
- Capacity Gap HoursCurrent Headcount
- 7
Inputs used
- Required billable hours
- 1,000
- Available hours per person
- 160
- Target utilisation
- 0.75
- Current headcount
- 7
Open this calculator with preset values
This calculator supports documented, shareable scenario URLs. Compatible assistants and applications can construct links using the parameters below.
Scenario links contain only allowlisted numeric and closed-choice inputs shown in the URL; Margin101 excludes free text and identifying fields. Anyone you share the URL with can read those numbers, so do not include private or identifying data.
| Parameter | Meaning | Unit | Allowed values | Presence | Default |
|---|---|---|---|---|---|
| availableHoursPerPerson | Total working capacity. | hours/person/period | 0 to 10000000 | Required | 160 |
| currentHeadcount | Current delivery team. | people | 0 to 10000000 | Required | 7 |
| requiredBillableHours | Demand for the period. | hours/period | 0 to 10000000 | Required | 1000 |
| targetUtilisation | Share available for billable work. | proportion of paid capacity billable | 0 to 0.99 | Required | 0.75 |
Utilisation to Headcount: billable capacity per person
The utilisation to headcount result uses only the entered commercial assumptions.
Formula summary
- Primary formula
- required headcount = ceil(required billable hours ÷ billable capacity per person)
Data used here
- The estimate uses your inputs and the general business formula documented in the methodology.
Decision checks
Stress-test the decision
Lower utilisation and available hours before committing to capacity.
When this estimate can be misleading
- Results depend on the accuracy and consistent basis of user-entered assumptions.
- The planner does not forecast demand, delivery performance or contract outcomes.
- Use the result as educational business decision support, not accounting, tax or legal advice.
- The utilisation to headcount result uses only the entered commercial assumptions.
Educational estimate, not advice. See all assumptions & limitations →
Related reading
Guides to interpret the decision and its assumptions.
- Agency Economics: Utilisation, Rate, Scope and Pipeline
Connect utilisation, recovery rate, scope delivery and committed pipeline without treating one ratio as an agency forecast.
Read guide
Frequently asked questions
How do I translate billable demand into headcount?
Compare the headcount gap with hiring, contractor and scheduling options.
Which planning assumptions should I stress-test?
Compare a plausible alternative scenario and verify the decision-critical assumption that changes the plan most.