The average net profit margin in Australian construction sits around 5%. For a company turning over $10 million, that's $500,000. It sounds like a reasonable number until you realise how thin the buffer actually is.
Where 2% Disappears
A 2% cost leakage across your projects means $200,000 gone. That's nearly half your total profit, lost to things that individually seem minor:
- Labour hours that crept over budget on two jobs because nobody compared actuals to estimates until month end.
- A variation completed on site that was never invoiced. The work got done, the cost was absorbed, but the revenue was never claimed.
- Materials charged to the wrong project code, inflating one job's costs while understating another.
- A subcontractor whose invoices exceeded the purchase order by 15%, noticed only when the final account was reconciled.
None of these are dramatic failures. They are quiet, incremental losses that compound across multiple projects over a full year.
The Compounding Effect
The problem with small leaks is that they are invisible until the damage is done. A foreman doesn't see 2%. A project manager reviewing monthly reports sees the result three weeks after the cause. By then, the money is spent and the margin is gone.
How to Find Your Leaks
Start with three checks across your active projects:
- Compare every subcontractor invoice received to date against the original purchase order. Flag anything over 10%.
- Review your last five completed jobs. Compare estimated labour hours to actual hours, line by line.
- Check your variation register. How many approved variations have not yet been invoiced?
These three checks alone will surface the majority of leakage. The fix is not more staff. It is connecting the systems you already have so this information surfaces automatically.