Your team lead has asked whether the service can safely take on three more NDIS referrals this month without anyone's caseload tipping into unsustainable territory — you need a number, not a gut feeling.
Allied Health Caseload Calculator
Caseload
Max caseload = (Clinical hours x 60) ÷ (Session length × Sessions per week)
This is a capacity ceiling based purely on clinical hours — it doesn't account for admin time, travel between visits, report writing or DNA/cancellation rates, all of which reduce real capacity below this maximum.
Reference: general workforce capacity planning method used across allied health services
Results are estimates for planning purposes. Verify with current guidelines and a qualified professional.
1 What this calculator does
Calculates the maximum number of clients a clinician or service can sustainably see per week given available clinical hours, typical session length and how often each client is seen. If you enter your current active client count, it also shows your current capacity utilisation percentage.
2 Formula & professional reasoning
Max caseload = (Clinical hours per week x 60) / (Session length in minutes x Sessions per client per week)
Utilisation % = (Required hours / Available hours) x 100
This is a straightforward capacity-planning calculation: total available minutes divided by minutes required per client per week. It treats clinical hours as the constraining resource, which is realistic for most community and NDIS-funded allied health services where billable time (not physical space or equipment) is the bottleneck. The result is a ceiling, not a target — real-world caseloads should sit below this maximum to leave room for cancellations, urgent reviews, documentation and non-billable coordination time.
3 Worked examples
⚠️ Illustrative example only — not clinical or professional instruction.
Basic
Solo practitioner, weekly sessions
Given: 28 clinical hours/week, 45-min sessions, 1 session/client/week
Working:
(28x60)/(45x1) = 1680/45 = 37.3Answer: Max caseload: 37 clients
💡 At 45 minutes weekly per client, this practitioner's clinical-hours ceiling is 37 active clients — before accounting for admin time.
Standard
Twice-weekly intensive program
Given: 30 clinical hours/week, 30-min sessions, 2 sessions/client/week
Working:
(30x60)/(30x2) = 1800/60 = 30Answer: Max caseload: 30 clients
💡 Higher visit frequency per client roughly halves the maximum caseload compared to once-weekly sessions of similar length.
Advanced
Mixed caseload with utilisation check
Given: 32 clinical hours/week, 50-min sessions, 1.5 sessions/client/week average, 28 current clients
Working:
Max = (32x60)/(50x1.5) = 1920/75 = 25.6 | Required for 28 clients = 28x1.5x(50/60) = 35 hrsAnswer: Max caseload: 25 clients | Current 28 clients need 35 hrs/week vs 32 available (109% utilisation)
💡 This caseload is already over its clinical-hours ceiling — a strong signal to review frequency, discharge-ready clients, or request additional clinical hours.
4 Sanity check
Healthy utilisation range
70-90% of clinical-hours capacity is generally sustainable with room for cancellations and urgent reviews
Consistently running at 100%+ utilisation is a burnout and safety risk signal
Admin time not included
This calculator only accounts for face-to-face clinical time — most roles also need 20-30% of total hours for documentation, reports and coordination
A realistic caseload is often lower than the pure clinical-hours maximum once admin time is factored in
Session frequency sanity check
0.5-2 sessions per client per week covers most community and NDIS caseloads
Frequencies well outside this range warrant double-checking the input
DNA/cancellation buffer
Many services see 10-20% no-show or cancellation rates
Actual billable hours often run below the theoretical maximum for this reason too
5 Common errors
| Error | Cause | Consequence | Fix |
|---|---|---|---|
| Excluding non-billable clinical time | Treating 100% of rostered hours as available for direct client sessions | Overestimates true capacity, since documentation and internal meetings also consume paid hours | Subtract a realistic admin/documentation percentage (commonly 20-30%) from total hours before entering 'clinical hours available' |
| Using an average session length that hides a bimodal caseload | Averaging very short reviews and very long initial assessments into one figure | Result doesn't reflect the true mix of quick vs intensive clients | Calculate separately for new/initial-assessment clients and established/maintenance clients if session lengths differ significantly |
| Ignoring travel time for outreach or home-visit services | Assuming clinical hours equal availability, when a meaningful chunk is spent travelling between visits | Overstates caseload capacity for community/outreach roles | Subtract estimated weekly travel time from available clinical hours before calculating |
| Treating the maximum as a target rather than a ceiling | Deliberately staffing to exactly 100% of calculated capacity | No buffer for cancellations, urgent reviews or staff leave — service becomes fragile | Aim for 70-90% utilisation of the calculated maximum as a sustainable operating target |
6 Reference & regulatory links
🇦🇺 Australia
7 Professional workflow
Common tools used alongside this one:
Exercise Load & Progression (RPE)
Once caseload capacity is confirmed, use this to plan individual client exercise progressions within available session time
→
Rehabilitation Outcome Measure Scorer
Track whether existing caseload clients are ready for reduced frequency or discharge, freeing up capacity
→
NDIS Support Hours Estimator
For NDIS-funded caseloads, cross-check client session frequency against their funded support hours
→