Can You Get Interest and Penalties on Unpaid Wages?

Start with interest, because it is the more commonly misunderstood of the two.

Under the Fair Work Act, in making an order the court must, on application, include an amount of interest in the sum ordered, unless good cause is shown to the contrary (art. 547(2)). That is a strong provision: interest is not a long shot, it is the default once you ask for it, and the employer has to show good cause to keep it out.

The amount reflects time. The court, "in determining the amount of interest, … must take into account the period between the day the relevant cause of action arose and the day the order is made" (art. 547(3)). The longer you went unpaid before the order, the larger the interest component tends to be.

But here is the crucial limit: the Fair Work Act fixes no interest rate. The rate follows the rules of the court hearing the matter — for example, the pre-judgment interest rules of the Federal Court — not a figure set by the Act. For that reason, no one can honestly quote you a fixed statutory interest rate for an Australian wage claim. Interest is best understood as judicial discretion: a court will very likely add it on application, but the amount is worked out by the court under its own rules, not predicted in advance.

There is one particularly useful feature of interest to know. The simplified small claims procedure (art. 548) caps what the court may award at $100,000. But interest awarded under art. 547 does not count towards that cap (art. 548(2A)). So choosing the small claims route does not force you to sacrifice interest — it is added on top of the capped amount, not squeezed inside it.

The second mechanism is different in kind. Under the Fair Work Act, a court may, on application, order a person to pay a pecuniary penalty that the court considers is appropriate if the court is satisfied that the person has contravened a civil remedy provision (art. 546(1)).

Two features define penalties:

• They are measured in penalty units. The maximum is set by the number of penalty units in the relevant column of the table at art. 539(2) — and multiplied by five for a body corporate (art. 546(2)). A company therefore faces a materially higher ceiling than an individual.
• They are a public sanction, not your wage recovery. A penalty punishes the contravention; it is not the money you were shorted. It can be ordered to be paid to the applicant or to the State.

So a penalty is not part of your underpayment calculation. It is a separate consequence the employer may face for breaking the law — for failing to pay correctly, or for failing to keep records or issue pay slips, each of which is a civil remedy provision.

You will notice that neither interest nor penalties can be reduced to a number in advance. That is deliberate, and honest:

• Interest — the court will likely add it on application, but the rate is the court's, not the Act's, so we never quote a fixed figure.
• Penalties — the amount is at the court's discretion, in penalty units, and it is a sanction rather than your wages, so it does not belong in your underpayment total.

What both give you is pressure. An employer facing not only a back-pay order but also likely interest and a possible pecuniary penalty has a strong incentive to resolve the matter earlier — in a written exchange, through the Fair Work Ombudsman, or in small claims — rather than fight it out. Used that way, interest and penalties are powerful. Quoted as fixed figures, they would be misleading. We present them as leverage.