Why Payroll Systems Miss EBA Super Minimums

Payroll systems miss EBA super minimums because most calculate super as a percentage of ordinary time earnings. Many enterprise agreements add a fixed weekly floor, special earnings rules or a higher-of test that standard payroll settings do not recognise.

The payroll calculation can be right and still be wrong

Most payroll products start with the Superannuation Guarantee rules. They identify ordinary time earnings, apply the SG rate and create a contribution.

That works until an enterprise agreement, often called an EBA on site, says something more generous applies. A construction agreement might require:

• a fixed minimum contribution for each eligible week
• a percentage contribution, subject to a weekly minimum
• super on allowances or payments outside the usual SG earnings base
• different minimums for apprentices, casuals or other classifications
• an annual increase tied to a date or wage schedule
• a particular rule for leave, RDOs or part weeks

A basic percentage calculation cannot work all that out by itself. The clause needs to be translated into payroll rules.

For more background on how construction agreements affect pay, visit the EBA payroll hub. You can also test a weekly amount using the minimum weekly super calculator.

The legal baseline is not always the employee's full entitlement

As at October 2026, the statutory SG rate is 12% of ordinary time earnings, subject to the applicable SG rules. An agreement can require more than that baseline.

As at October 2026, SG contributions generally need to reach the employee's super fund within 7 business days of payday under the payday super rules that commenced on 1 July 2026. Limited exceptions can affect the first contribution for a new employee and some out-of-cycle payments.

As at October 2026, payroll and employment records generally need to be retained for 7 years under workplace laws. That matters when a weekly super shortfall is discovered well after the pay run.

As at October 2026, an enterprise agreement's nominal expiry date cannot be more than 4 years after the Fair Work Commission approves it. Expiry does not automatically switch the agreement off. It can keep operating until it is replaced or terminated.

These figures show why payroll needs both current statutory settings and the actual agreement. Checking only the SG rate is not enough.

Where the system usually loses the minimum

Here is the common mismatch.

Rule being applied	What payroll calculates	What can be missed
Standard SG rule	12% of ordinary time earnings	A higher EBA entitlement
EBA percentage rule	Agreed percentage of defined earnings	EBA earnings may differ from ordinary time earnings
Fixed weekly minimum	Set amount for an eligible week	Payroll may have no weekly floor configured
Higher-of rule	Greater of percentage result or fixed minimum	System may add both amounts or use only the percentage
Part-week rule	Full minimum, pro-rata amount or no minimum, depending on the clause	Generic payroll proration may not match the wording
Annual increase	New minimum from the agreement's specified date	Old amount can remain in a recurring payroll setting

The important bit is the comparison. Payroll may need to calculate the percentage amount and the weekly minimum separately, then pay whichever the agreement says applies.

A simple example

Suppose an employee has $800 of relevant weekly earnings. At 12%, the percentage result is $96.

Now suppose their agreement requires a weekly minimum of $150 for that type of week. If the clause uses a higher-of test, the required contribution is $150. The shortfall is $54.

If relevant earnings rise to $1,600, the 12% result is $192. The percentage result is now higher than the hypothetical $150 floor, so $192 applies.

Those figures are examples only. The actual minimum, earnings base and eligibility test must come from the agreement that covers the employee.

Small clause details cause large payroll errors

The number is often the easy part. Eligibility wording causes more trouble.

A payroll team needs to know what happens when an employee:

• starts or leaves during the week
• works one day and takes unpaid leave for the rest
• takes annual leave, personal leave or an RDO
• receives workers compensation
• has no ordinary hours but receives another payment
• moves between classifications
• becomes an adult apprentice or advances a year level
• works across entities or projects with different agreements

Do not assume the minimum should always be divided by five days. Some clauses require a full weekly amount once a condition is met. Others allow proration or exclude particular absences.

Monthly payroll can add another trap. A weekly minimum should not automatically become the weekly figure multiplied by 52 and divided by 12. Calendar months contain different combinations of weeks and pay periods. The agreement's wording and the employer's pay cycle need to be mapped carefully.

Payday super does not fix a wrong entitlement

Faster payment rules deal with when money reaches the fund. They do not decide how much the employee is owed.

If payroll calculates $96 when the agreement requires $150, sending the $96 within the required period still leaves a $54 underpayment. Timing compliance and amount compliance are separate checks.

Late or insufficient contributions can also create SG charge exposure. An EBA shortfall may separately be a breach of the agreement. The ATO and the Fair Work system deal with different parts of the problem, so fixing one does not necessarily fix the other.

How to stop the minimum being missed

Start with the clause, not the payroll field. Write down these items in plain English:

1. Who is covered.
2. The percentage and its earnings base.
3. The fixed minimum and its effective date.
4. Whether the rule is higher-of, additional or something else.
5. What happens in part weeks and on each leave type.
6. When classification changes take effect.
7. How corrections reach the employee's fund.

Then configure separate calculation values for the percentage result and the minimum. Keep the comparison visible in payroll reports. A single final super figure makes it hard to see why the amount was chosen.

Run an exception report each pay cycle. Look for covered employees whose contribution is below the current minimum, employees with zero super, and anyone whose classification or agreement changed.

Finally, test real edge cases before each agreement increase. Use a full week, a one-day week, paid leave, unpaid leave, an apprentice progression and a termination pay. That is the practical way to catch a rule that looks fine in setup but fails on site payroll.