The silent killer of profitable trade and construction firms
It is one of the most frustrating paradoxes in commercial business: on paper, your profit and loss statement shows a healthy $350,000 net profit, your order book is packed for the next six months, and your team is billing record hours.
Yet every Friday before payroll, there is an emergency scramble for cash.
This phenomenon is not bad luck. It is the direct mathematical consequence of mismanaging Work in Progress (WIP) and failing to calculate True Gross Margins.
In commercial construction, mechanical services, electrical contracting, and civil trades, businesses do not run out of profit before they fail — they run out of cash.
The difference between mark-up and true gross margin
Many trade contractors price jobs by taking estimated labour and material costs and adding a mark-up (for example, +25%). But mark-up and gross margin are fundamentally different mathematical concepts:
- A 25% mark-up on $100,000 of direct costs produces a sell price of $125,000.
- But your gross margin on that job is only 20% ($25,000 profit ÷ $125,000 revenue).
If your fixed overhead costs (estimating, vehicles, rent, software, admin salaries, insurances) equal 22% of revenue, you have just priced a job that mathematically loses 2% on every single invoice — all while the owner believes they are making 25% profit.
Furthermore, trade businesses routinely underestimate their True Labour Burden:
- Base wage ($45/hr) does not include superannuation (12%), workers compensation (3–5%), annual leave, sick leave, public holidays, payroll tax, training downtime, and vehicle travel.
- The actual hourly cost to employ that technician is often $72 to $85 per hour.
If you estimate jobs using raw wage rates, your true gross margin evaporates before the job even commences.
Work in Progress (WIP): The balance sheet illusion
Work in Progress represents the direct labour, materials, and subcontractor costs incurred on active jobs that have not yet been certified and invoiced to the client.
Without formal WIP accounting, financial statements produce dangerous distortions:
Scenario A: Under-billing (Unbilled WIP)
You have incurred $150,000 in labour and suppliers on a major commercial fitout during September, but contract milestone rules prevent you from issuing a claim until October.
- On standard cash accounting, September shows a massive artificial loss because expenses are recorded with zero matching revenue.
- More dangerously, that $150,000 of your cash is trapped on the client's jobsite without billing protection.
Scenario B: Over-billing (Deferred Revenue)
You receive a 20% mobilization advance ($100,000) on day one.
- If your bookkeeper records that as income in the P&L, you look wildly profitable in month one.
- But that cash does not belong to you yet; it is a liability owed to the job. If the business draws that cash to pay older debts or tax liabilities, you will suffer a catastrophic cash drought when the actual construction costs hit in months three and four.
How WIP accounting solves the cashflow mystery
Accurate commercial accounting uses the Percentage-of-Completion Method:
- At the end of every month, every major job is evaluated:
Actual Costs Incurred ÷ Estimated Total Job Costs = % Complete. - Earned revenue is calculated based on that percentage, regardless of invoice timing.
- If invoiced revenue exceeds earned revenue, the excess is isolated on the balance sheet as an Accrued Liability (Income in Advance).
- If earned revenue exceeds invoiced amounts, it is recorded as an asset: Accrued Income (WIP Asset).
This aligns your financial reporting with economic reality. You see exactly which project managers are delivering profitable jobs and which projects are leaking margin before the final retention claim.
Protecting your QBCC licence through WIP management
For Queensland contractors, WIP classification directly impacts your statutory reporting:
- The QBCC inspects WIP on your balance sheet during MFR reviews and licence audits.
- Unbilled WIP that is disputed or unrecoverable must be written off. If not managed properly, sudden WIP write-downs erase your Net Tangible Assets overnight, triggering immediate licence compliance action.
- Maintaining disciplined, documented monthly WIP registers proves to the QBCC that your balance sheet reflects real, recoverable value.
How regular advisory catch-ups engineer cash security
You cannot manage WIP margins through annual tax returns. Margin slippage must be caught while jobs are active, not six months after completion.
Through Level Up CA’s regular advisory catch-ups:
- We implement job costing systems that track actual direct costs against estimates in real time.
- We review your monthly WIP schedules, identifying under-billed and over-billed positions.
- We calculate true labour burden rates so your tenders protect your net profit.
- We forecast rolling working capital so you always know your exact cash position weeks ahead of payroll.
If your business is turning over high revenue but bank balances feel consistently strained, call the direct line. We will open your job ledgers and locate the cash.
