A council that reports a 95% asset renewal ratio one year and 60% the next — on roughly the same capital spend — didn't stop maintaining infrastructure. It changed how it classified the work.
That's the risk sitting inside one line item in every LTFP. Renewal is capital: it restores service potential or extends useful life, and belongs on the balance sheet against the asset's remaining life. Maintenance is opex: it keeps an asset functioning to its original standard, nothing more. Blur the two and you don't just misstate one year's figures — you distort the trend an auditor, TCorp, or your own council relies on to judge the LTFP's credibility.
Where it goes wrong
Rarely deliberate. More often it's inconsistency: one depot codes a full pavement reseal as renewal; another books an identical job as maintenance because it came out of the same recurring contract. Multiply that across asset classes and reporting periods, and the Asset Renewal Ratio stops measuring renewal — it measures which cost centre did the coding.
What good looks like
A documented capitalisation policy, applied the same way, every asset class, every year. The test is simple: does the work restore service potential or extend useful life (renewal), or does it merely sustain current function (maintenance)? Apply the AASB 116 test consistently, tie it to your AMP's condition and renewal forecasts, and make sure whoever codes the invoices is using the same rule as whoever builds the LTFP model.
Councils that get this right can defend their backlog number in front of ARIC without qualification. Councils that don't spend the audit meeting explaining a ratio nobody can reconcile.