"We'll sort the super out when cash improves."
It is one of the most expensive sentences in small business. Not because anyone is being cynical — most employers who fall behind on super are cash-poor and hoping the problem resolves itself. But the super system charges you for waiting, and it charges you most heavily for skipping the one step that costs nothing: lodging a form.
Here is how the system actually works, and what to do if you are behind.
The charge is not the super you missed — it is bigger
If super is not paid in full and on time, the obligation does not simply roll over. It converts into the super guarantee charge (SGC): a different and larger liability, owed to the ATO rather than to the fund.
For quarters up to 30 June 2026, the SGC has three parts.
| Component | How it works |
|---|---|
| SG shortfall | Calculated on salary and wages — not ordinary time earnings |
| Nominal interest | 10% a year, running from the first day of the quarter |
| Administration fee | $20 per employee, per quarter |
The first line is the one that catches people out. Ordinary super is calculated on ordinary time earnings (OTE), which excludes most overtime. The SGC shortfall is calculated on salary and wages, which includes it. If your rosters carry a lot of overtime, the charge will already exceed the super you thought you owed before a cent of interest or penalty is added.
The interest is also not what most people picture. It does not start at the due date — it runs from the first day of the quarter, and keeps running until the statement is lodged.
And for those quarters, none of it is deductible: not the shortfall, not the interest, not the fee. Ordinary super paid on time is fully deductible. So the same dollar of super costs you materially more once it has become a charge.
Paying the fund late does not undo it
This is the most common misunderstanding we see. An employer realises they are behind, scrapes the money together, pays it straight to the fund, and considers the matter closed.
It isn't. A late contribution does not discharge the SGC. The obligation to lodge an SGC statement remains, and the charge is still assessed. For quarters ending on or before 31 March 2026 there was a late payment offset that let a late contribution be counted against the charge — but that concession has closed, and it was never available for later periods.
Talk to your accountant before you pay a fund to catch up. The sequencing changes the outcome.
What happens if you do nothing
Single Touch Payroll removed the information gap that this problem used to hide in. Wages are reported to the ATO each payday, and funds report the contributions they receive. Where those two do not line up, the ATO does not need to guess — it can raise a default assessment built largely from figures the employer reported themselves. The old assumption that nobody will notice is simply out of date.
Default assessment is also where the expensive part appears. For quarters under the old rules, failing to lodge an SGC statement on time exposes the employer to a Part 7 penalty of up to 200% of the charge. Remission is discretionary, and the ATO weighs how far the employer tried to comply — with meaningful relief generally reserved for those who lodged before audit action began. General interest charge then accrues on the unpaid balance, penalty included, so the debt keeps growing on top of the growth already built into it.
The asymmetry at the heart of this
Put those two paths side by side and the shape of the problem becomes obvious.
In a pattern we see repeatedly across employers who have fallen behind: unpaid super left to run for a couple of years, and left to default assessment, ends up around 1.6 times the original obligation once charge, interest and penalty are added. The Part 7 penalty alone can exceed the entire unpaid super amount. And where the same employer lodged one quarter voluntarily, that quarter attracted no Part 7 penalty at all, while the quarters left to the ATO drew penalties of over 100% of the charge.
The variable was not how much was owed, or whether the employer could pay. It was whether a statement was lodged.
Lodging is free. Not lodging is where the money is lost. If you take one thing from this article, take that.
It becomes personal
Super debts do not stay inside the company. Under the director penalty regime, directors are personally liable for unpaid SGC, and the ATO can recover it by offsetting personal tax refunds and credits — many directors discover the problem when a refund they were counting on simply never arrives.
Lodgement timing matters here too, and sharply. If the SGC is reported by its due date, a director penalty can still be remitted by several routes. If it is reported late, or never reported, the practical position narrows to one: the company's liability has to be paid in full.
That is the same asymmetry again, this time with the director's own money on the other side of it.
What changed on 1 July 2026
Payday Super replaced the quarterly deadline. Contributions must now reach the employee's fund within 7 business days of paying qualifying earnings. Missing that triggers a new-look charge: the shortfall, notional earnings that compound daily at the general interest charge rate, and an administrative uplift currently set at 60% of those two combined.
Two things are genuinely better under the new rules. The charge is deductible if you pay it — a real change from the old regime. And there is no Part 7 penalty.
One thing is worse. If the ATO issues a notice to pay and the amount is still outstanding 28 days later, a late payment penalty of 25% applies — 50% for a repeat within two years — and it cannot be remitted.
The deadline changed. The principle did not: disclose early, and the system treats you differently.
If you are behind, in order
- Quantify it properly. Work out the real exposure per quarter on salary and wages, not on what you assume the super was.
- Lodge. Even if you cannot pay a cent. Lodgement is what protects you from the penalty and preserves the director's remission options.
- Then talk about paying. Payment plans are negotiated after the liability is on the record, not instead of it.
- Get advice before paying a fund directly to catch up on an old period. It may not do what you expect.
- Fix the process, not just the arrears. Under a 7-business-day rule, a payroll routine built for quarterly deadlines will keep producing the same problem.
Most employers in this position are not trying to avoid anything. They are behind, embarrassed, and waiting for a better month. The system is not designed to reward that wait — but it does reward putting your hand up, and it does so by a wide margin.
This article is general information only and does not take your circumstances into account. It is not financial, tax or legal advice. Rules on super guarantee, penalties and director liability are detailed and change often, and the right course depends on your own facts. If you have missed super or are unsure where you stand, contact United Square and we will look at your position with you.
Sources — Australian Taxation Office: The quarterly super guarantee charge · The new super guarantee charge · Payment deadlines for Payday Super · Late payment offset will no longer be available · Reducing the risk of penalties · Director penalty regime