Sampling overtime before it surprises the auditor

Overtime disputes often surface when financial audit applications show payroll expense rising while operations insist hours were flat. The gap is usually a rule, not a rumour.

Start with cohorts, not anecdotes

Export three closed pay cycles and group employees by department, grade, and overtime eligibility. Compare recorded overtime hours to amounts paid. Where the ratio jumps for one grade only, open the application multiplier table for that grade before interviewing managers.

Watch mid-year agreement changes

Collective agreements and salary structure updates frequently land mid-year while application tables lag by a cycle or two. Tag employees whose grades changed and sample them separately; blended averages hide their impact.

Tie outliers to journals

Once an outlier cohort appears, trace a handful of employees into the financial audit application or general ledger payroll account. If the ledger matches the inflated pay, you have a configuration problem — not a posting problem. That distinction changes who owns the fix.

Keep the sample defensible

Document why cohorts were chosen and which cycles were closed. Auditors care less about perfect coverage than about a repeatable method. A thin, well-explained sample beats a sprawling export nobody can narrate.