Caseload Capacity Calculator — Imogen Nolan

What is in this tool

Two tools. One complete picture.

This resource combines a cognitive load calculator with a work forecasting calendar. Here is what each one does and why it matters.

Part A

Cognitive Load Calculator

Maps your current caseload against your working week baseline. Assigns each client a colour based on clinical complexity and emotional load, calculates the hidden cognitive overhead they generate beyond their scheduled hours, and tells you whether your brain is within or beyond its capacity right now.

Use this when reviewing your current caseload, when deciding whether to accept a new referral, or when you want to understand why you feel overloaded even on a light calendar day.

Part B

Work Forecasting Calendar

Plans your current pieces of work across coming weeks. Takes each episode of care, assigns a total hours estimate and a weekly schedule, and builds a week-by-week picture of your total billable demand. Tells you exactly when that demand drops to capacity, meaning the first week you can genuinely take on something new.

Use this when planning your intake, managing a complex caseload mix, or having conversations with a team leader about workload and capacity.

How to use them together Start with Part A to understand your current load. Use your working week numbers from Part A as the baseline for Part B. The forecasting calendar then tells you not just whether you are over capacity now, but when you will have room again and how to plan your intake to stay within it.

Part A — Cognitive Load Calculator

Two numbers that change everything

Most capacity tools count hours. This one counts cognitive load alongside hours, so you can see the full picture.

Why community OT does not work like a hospital model Allied health and hospital models are often built around back-to-back appointments. Clinic-based paediatric OT can look similar on paper. But community OT does not work that way. You are in the community, between locations, managing complexity that does not begin or end at the session. A two-hour home visit might generate forty-five minutes of documentation, two phone calls to a support coordinator, a follow-up email to a funding body, and a conversation with a family member you were not expecting. None of that is on your calendar. But all of it is on your highway.

This calculator accounts for that. It separates what you bill from what you actually carry, so you can see the real cost of your caseload, not just the scheduled version of it.

If your expected billable target is 25 hours per week, I recommend only scheduling 20 hours of direct client time. That five-hour buffer is not slack. It is the space community OT actually needs to function, phone calls, incidentals, coordination, the things that happen between sessions that never make it onto the billing sheet. If you are scheduling all 25 hours as direct client time, you are already over capacity before a single unexpected thing happens.

A note for early career OTs If you are newer to the role, you may find that clients who are genuinely amber or red on the complexity scale feel red simply because you are still building clinical confidence and processing speed in this context. That is completely normal and it does not make the load less real. As your clinical reasoning becomes more automatic and your systems become more established, some of those clients will shift down in colour. The colour reflects your current experience with this presentation, not a fixed rating of the client. Use it as an honest snapshot of where you are right now, not a permanent label.

How the colour ratios work

Green

Low clinical complexity and low emotional load. Routine presentation, predictable, minimal risk. What you bill is what you carry.

Ratio 1:1 · No hidden cognitive load

Amber

Moderate complexity or emotional load. More reasoning required, or more emotional bandwidth to hold. Generates cognitive overhead beyond the billable time.

Ratio 1.5:1 · 0.5 hrs hidden load per billable hour

Red

High clinical complexity and or high emotional load. High risk, significant advocacy, complex coordination. Much of the load is billable, but the cognitive tail beyond billing is significant.

Ratio 2:1 · 1 hr hidden load per billable hour

How the calculation works

Total working hours per week e.g. 38 hours

— Expected billable hours (your workplace KPI) e.g. 25 hours

— Non-billable admin time e.g. 10 hours (meetings, supervision, team admin)

= Cognitive capacity buffer hours e.g. 3 hours — this is your real holding space

Hidden cognitive load from amber and red clients is then compared against this buffer. If it exceeds your buffer, your brain is carrying more than your working week actually has room for.

Step 01

Set your working week baseline

Enter your real numbers, not your contracted ideal. Be honest about what your week actually looks like.

Total working hours per week Include everything, client time, admin, travel, team

Expected billable hours per week Your workplace KPI or billable target, not what you actually end up billing

Non-billable admin hours per week Meetings, supervision, internal admin, team coordination

— Total working hours

—

— Billable + admin hours

— Cognitive capacity buffer hours

Your cognitive capacity buffer is the hours your brain has available to absorb complexity beyond what is formally billed. It could also be where system changes, unexpected client needs, and incidentals land.

Remember, we need a cognitive capacity buffer to enable the higher level thinking that makes us effective clinicians — writing reports, emotional regulation, problem solving, and holding complexity for our clients. Higher complexity clients will naturally absorb more of this buffer, and that is okay. What matters is that we are not consistently exceeding it. When we go beyond our cognitive capacity buffer, that is where overwhelm and overload take hold.

Step 02

Map your caseload

Add each client. Assign their colour based on your current clinical experience with them. Enter their weekly billable hours including session time, documentation, travel, and coordination.

Client or reference	Colour	Billable hrs/wk	Hidden load hrs

Step 03

Your capacity picture

What your caseload is actually costing you, in brain and in time.

Total billable hours

Add your planned hours above to compare

Hidden cognitive load hours

The hours your brain is carrying beyond what is scheduled

Buffer remaining

—

After hidden load is absorbed

Billable hours vs planned—

Cognitive capacity buffer used by hidden load—

0 Green 0 hrs billed

0 Amber 0 hrs billed

0 Red 0 hrs billed

Your caseload is not just a calendar problem.

Two OTs can have exactly the same number of clients and completely different cognitive loads depending on the mix. Now you can see yours clearly.

Use this calculator at the start of each fortnight. When a new referral comes in, run the numbers before you say yes. Knowing what you can actually hold is one of the most protective things you can do for your clinical capacity, and for the life you want outside of work.

Part B — Work Forecasting Calendar

When do you have capacity for something new?

Map your current pieces of work and any upcoming leave across the next three months and find out exactly when your billable demand drops back to capacity.

How to use this section Start by adding any capacity adjustments — annual leave, public holidays, conference weeks, or any period where your available hours are reduced. Then add each piece of work you currently have underway or committed to. The planner builds a week-by-week picture of your total billable demand against your adjusted capacity and tells you when you first have room for a new intake.

Capacity adjustments

Add any periods in the next three months where your available billable hours are reduced. Days of leave are calculated against your daily rate, derived from your expected billable hours divided by five working days.

Pieces of work

Add each piece of work currently underway or committed to. Regular means the same hours every week until complete. Fluctuates means you define phases.