Most engineering and architecture consultancies track utilisation. They set a target, review it monthly, and use it to judge whether the team is productive. A firm sitting at 75 per cent utilisation feels like a firm in control of its numbers.
It is rarely in control of its numbers.
Utilisation tells you how much time the team allocates to projects. It says nothing about how much of that time becomes invoiced revenue, and nothing about how much of that invoiced revenue is actually collected. The figure that captures both is the realisation rate, and for most engineering and architecture firms across Queensland and New South Wales, that number has never been formally calculated.
The gap between utilisation and realisation is where the profit in a consultancy lives and dies.
What the Difference Looks Like in Practice
When an engineer or architect records eight hours on a job, the timesheet captures eight billable hours. But the invoice that follows rarely reflects eight hours of revenue. Fixed-fee contracts cap the upside. Scope creep quietly extends the work without extending the fee. Senior principals pick up tasks that should sit with junior staff. Proposals, coordination, and client management time accumulate in the non-billable bucket. When the invoice goes out, the amount is sometimes less than the hours logged, sometimes negotiated down at project close, and sometimes not collected for sixty or ninety days.
The realisation rate captures all of that erosion in a single number. It is calculated as total revenue invoiced and collected in the period, divided by total billable hours multiplied by the standard hourly rate. A firm with a $180 standard rate that records 10,000 billable hours has a theoretical capacity revenue of $1.8 million. If the firm invoiced and collected $1.44 million, the realisation rate is 80 per cent. That 20-point gap is $360,000 in revenue that was worked for but never captured. It does not appear as a visible cost because it never arrives as income.
How to Calculate It From Your FY26 Numbers
The close of FY26 creates a natural calculation window. The year is reconciled, timesheets are complete, and invoices are settled or written off. Most practices can build this calculation from inputs already sitting in their project management software and accounting system: total billable hours by classification, standard fee rates, fees invoiced, and fees collected.
The calculation is most useful when run by project type rather than across the firm as a whole. A practice doing both government infrastructure work and private commercial projects will find the two rates diverge meaningfully. Government contracts with agreed milestones and structured payment schedules tend to realise well. Private commercial work, particularly smaller fit-outs, development approval support, and early-stage design retainers, frequently sits lower once scope variations and write-offs are factored in.
Where the number tends to surprise firm principals is in the project-level breakdown, not the firm-wide headline. A small number of well-structured engagements can carry the overall rate while a long tail of smaller jobs quietly pulls it down. The useful question is not whether the firm-wide number is acceptable, but which project types and which clients are responsible for the largest gaps between hours worked and revenue received.
What the Number Changes for FY27 Planning
Once a firm has its realisation rate, the FY27 capacity planning conversation takes a different shape. The question shifts from “how many people do we need to hit the revenue target?” to “what realisation rate do we need to achieve given our expected project mix, and what does that require of the team?”
A firm planning for $3 million in FY27 revenue with a historic realisation rate of 78 per cent needs $3.85 million in productive capacity to deliver it. That means specific decisions about available team hours, the split between time-and-materials and fixed-fee work, how scope changes are documented and charged, and whether fee rates have kept pace with the cost base following two consecutive award wage increases.
A Workforce Capacity and Utilisation Review typically starts with exactly this calculation: taking FY26 actuals, calculating the realisation rate by project type, and mapping it against the FY27 pipeline. For most engineering and architecture practices, the work surfaces decisions that do not require additional headcount to resolve. A tighter approach to scope documentation, proactive variation billing, and a shorter collections cycle can lift realisation meaningfully without changing the cost structure.
Firms that start FY27 with a calculated realisation rate have a planning foundation that firms tracking only utilisation do not. They know the revenue yield of each hour the team spends on a job, which is the only number that genuinely matters when sizing capacity, setting fees, and deciding which project types are worth pursuing. For Queensland engineering and architecture practices navigating an active but competitive infrastructure market, that clarity is a commercial edge worth building into the business from the first week of the new financial year. If you would like to work through the numbers for your practice, book a discovery call and we can start with your FY26 data.
Frequently asked questions
What is a realisation rate in an engineering or architecture firm?
The realisation rate is the percentage of billable hours that translate into invoiced and collected revenue. It differs from utilisation, which only measures how much time the team allocates to projects. Realisation captures all the revenue that leaks through fixed-fee caps, scope creep, write-offs, and slow payment before it reaches the business. Most Australian engineering and architecture firms have only ever tracked utilisation, not realisation. See our services page for the Workforce Capacity and Utilisation Review.
How do I calculate the realisation rate for my consultancy?
Divide your total invoiced and collected revenue for the period by total billable hours worked multiplied by your standard hourly rate. Running the calculation by project type rather than across the firm as a whole is more useful, since government infrastructure work and private commercial work tend to realise at very different rates. Your FY26 data, now fully reconciled, is the ideal starting point for this calculation.
What is a typical realisation rate for Australian engineering firms?
In our experience working with engineering and architecture consultancies, realisation rates typically sit between 70 and 85 per cent depending on the project mix. Firms with a higher proportion of fixed-fee private commercial work tend to sit at the lower end; those with more structured government or infrastructure contract billing tend to sit at the higher end. The more useful benchmark is your own trend across two to three financial years rather than an industry average.
Why is my engineering firm’s profit lower than the revenue suggests it should be?
The most common explanation is a gap between utilisation and realisation. When revenue is estimated from hours worked at standard rates, it tends to overstate what the firm actually invoices and collects. Scope creep on fixed-fee jobs, write-offs on disputed variations, and extended payment terms all compress the realisation rate without appearing as explicit costs on the P&L. Explore the ProfitPulse insights hub for more on profit structure in professional services firms.
How does a fractional CFO help an engineering or architecture practice?
A fractional CFO working with a consultancy firm typically focuses on project economics: which engagements are genuinely profitable, how the billing and collections process can be tightened, and whether the fee structure reflects the firm’s true cost of delivery. For engineering and architecture practices, the work often begins with a realisation rate analysis using the last full year of project data.
Can improving realisation rate increase profit without adding revenue?
Yes, and it is often the most direct path for a consultancy. A five-point improvement in realisation rate, from 78 to 83 per cent, on $2 million in productive capacity adds $100,000 in revenue with no additional headcount and no change to the cost structure. The levers are tighter scope documentation, proactive variation billing, and shorter invoice-to-collection cycles. Visit the services page for the Workforce Capacity and Utilisation Review that supports this work.
What financial review suits a Queensland engineering consultancy at the start of FY27?
For most engineering and architecture practices, the most useful starting point is a Workforce Capacity and Utilisation Review that maps billable hours against collected revenue by project type, surfaces the realisation gap, and produces a capacity plan for the year ahead. For practices based in Brisbane and across Queensland, book a discovery call to walk through your FY26 numbers.
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