Payroll Mistakes We See Most Often in Hong Kong SMEs

When we take over payroll for a new Hong Kong SME client, the same handful of payroll mistakes turn up again and again — not exotic compliance failures, but small, repeatable errors that accumulate quietly until an employee dispute or an audit surfaces them. This isn't a list pulled from a regulation textbook. It's what we actually find in client files.

Most articles on payroll compliance in Hong Kong read like a summary of the Employment Ordinance. This one doesn't. What follows are the payroll mistakes we see repeatedly when onboarding new SME clients — the kind that only show up once you've actually opened someone's payroll spreadsheet, not the kind you'd predict from reading the law alone.

Which payroll mistakes show up most often in new client handovers?

The single most common payroll mistake we find is inconsistent MPF contribution calculations across employees doing the same job — usually because the number was set manually years ago and never revisited when salaries changed.

A close second is misclassifying discretionary bonuses as part of average daily wage calculations for leave pay, which either overpays or underpays employees depending on which direction the error runs. We also regularly find companies that have been rounding statutory entitlements down "to keep things simple" — annual leave accrual, in particular, is a place where well-intentioned simplification quietly becomes non-compliance.

Why do these payroll mistakes keep happening in SMEs specifically?

Almost every case we've seen traces back to the same root cause: payroll was set up once, by whoever was available at the time, and then never audited again as the company grew.

A 5-person startup's payroll spreadsheet doesn't break when the company hits 30 employees. It just quietly stops being accurate, because nobody had the bandwidth to check whether the original formulas still matched current regulations or current headcount.

We've also seen payroll get passed between two or three different people over a company's history, each one inheriting the previous person's assumptions without verifying them, which is how a single miscalculation from three years ago is still running today.

What actually happens when these payroll mistakes surface?

In our experience, payroll mistakes rarely surface through a proactive audit — they surface when an employee leaves and disputes their final pay, or when a routine IRD or MPF check flags an inconsistency.

By that point, the company is often looking at a multi-year correction, not a one-off fix, because the same error has been repeating every pay cycle since it was introduced. The cost isn't just the correction itself — it's the time spent reconstructing years of payroll history to figure out exactly how far back the error goes.

Payroll mistakes we see most often

Mistake	Why It Happens	What We Typically Find
Inconsistent MPF contribution rates	Set manually once, never revisited after salary changes	Same role, different contribution amounts across employees
Discretionary bonuses included in leave pay calculation	Confusion between wages and discretionary payments	Leave pay consistently over- or under-calculated
Annual leave accrual rounded down	Simplifying manual tracking	Statutory minimum quietly underpaid over time
Payroll formulas not updated after headcount growth	No formal handover or audit process	Spreadsheet logic built for 5 employees still used at 30+
No clear record of payroll ownership history	Payroll passed between staff without documentation	Errors inherited and repeated without anyone verifying the source

What this means for your company

None of these payroll mistakes are the result of carelessness — they're the predictable outcome of payroll being treated as a one-time setup rather than an ongoing process that needs periodic review.

If your payroll hasn't been audited since your company was a fraction of its current size, there's a reasonable chance one or two of these issues already exist quietly in your records.

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*This article reflects HR Plus's own observations from client onboarding and isn't legal advice. Confirm specific payroll and compliance requirements with the Labour Department, MPFA, IRD, or a qualified advisor.