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What if the payroll data you finalised for a client this EOFY is quietly wrong and your client’s employees only find out when their tax return does not match what they expected?
Keep reading, this guide walks you through exactly how to prevent that from happening.
As per ATO Single Touch Payroll (STP) requirements, finalised payroll data becomes the official source for employee tax return prefill, making accuracy non-negotiable for CPA firms. STP finalisation 2026 is not just a box to tick before 14 July. In Australia, EOFY (End of Financial Year) marks the close of the financial reporting period on June 30 and the beginning of critical compliance processes such as STP finalisation and tax preparation. It is the moment the ATO locks in your client’s payroll data and uses it to pre-fill every employee’s income tax return. Get it wrong, and the consequences travel fast from your client’s payroll records straight into individual tax assessments.
The good news is that most STP reporting Australia EOFY errors are predictable and preventable. They tend to follow the same pattern every year. Knowing where to look and how to act quickly when you find something is what separates a clean finalisation from a drawn-out compliance problem.
What STP Finalisation Actually Requires?
Following EOFY (End of Financial Year) on June 30, CPA firms enter a critical reporting phase where payroll data must be verified and finalised for ATO compliance.
Think of STP finalisation as your client’s payroll sign-off to the ATO. It is the declaration that says all payroll data reported throughout the financial year is correct. ATO guidelines confirm that once data is finalised, it is treated as complete and accurate unless corrected through an update event.
Under STP Phase 2 requirements Australia mandates, most employers must submit their finalisation declaration by 14 July 2026. Closely held payees’ directors, shareholders, and family trust employees have a separate deadline of 30 September 2026.
Missing the deadline is one problem. But finalising with incorrect data is worse because the ATO treats it as confirmed and accurate. That is why a reliable EOFY payroll checklist Australia CPA firms can follow every year is not a nice-to-have. It is the first line of defence against errors that compound.
The Most Common STP Errors After June 30
Most payroll finalisation Australia 2026 errors do not come from complex situations. They come from the same recurring gaps that appear across client files every EOFY. Here is where CPA firms should focus first:
- Gross income and tax withheld figures that do not match payroll system records
- Allowances categorised under the wrong STP Phase 2 disaggregated payment type
- Employment termination payments (ETPs) assigned to the incorrect tax treatment code
- Reportable fringe benefits amounts (RFBA) missing or applied to the wrong employee record
- Reportable employer super contributions (RESC) not correctly separated from the standard super guarantee amount
- Director and closely held payee payments lodged under non-compliant payment categories.
These errors are among the most common issues identified during EOFY payroll reviews and can trigger ATO scrutiny if left unresolved.
Each of these errors flows directly into what employees see when they lodge their tax return. Catch them before finalisation and the fix is straightforward. Miss them and you are dealing with two problems, a correction in the STP system and a potential amendment to an individual tax return.
Is your firm's STP data fully ready for finalisation?
Unison Globus Australia helps CPA firms manage payroll outsourcing services, payroll reconciliations, and compliance-focused EOFY workflows accurately and on time.
The STP Finalisation Checklist: Five Checks That Matter Most
CPA firms that follow an ATO-aligned EOFY payroll checklist significantly reduce the risk of post-finalisation corrections and employee discrepancies.
These are the checks firms should prioritize before they are locked in:
1. Reconcile STP Year-to-Date Figures Against Payroll Reports
This is one of the first checks firms complete and still one of the most common places discrepancies appear.
Before lodging the finalisation declaration, confirm that employee year-to-date figures reported through STP match the payroll system exactly.
That includes reviewing:
- Gross wages
- PAYG withholding
- Bonuses and commissions
- Allowances
- Leave payments
- Salary sacrifice amounts
- Termination payments
EOFY adjustments, back payments, or payroll corrections made throughout the year can easily create reporting mismatches if they were not processed correctly through STP events.
2. Match Payroll Data with General Ledger Accounts
Payroll reconciliation should never stop at the payroll platform alone.
One of the biggest EOFY delays firms face comes from unexplained variances between payroll reports and general ledger wage accounts.
These variances are often caused by:
- manual journal entries
- duplicated wage postings
- incorrectly mapped payroll categories
- unreconciled clearing accounts
- super or PAYG adjustments processed separately
During busy EOFY periods, even small differences can slow down reviews significantly especially when firms are handling multiple client payrolls simultaneously.
A cleaner reconciliation process before finalisation reduces rework later.
3. Verify Superannuation Reporting and Payments
The ATO continues to monitor super payment accuracy and timing closely, making this a high-risk area during EOFY reviews. It’s not enough for super amounts to appear correctly in payroll reports. Firms should also confirm that contributions were actually paid correctly and on time to employee super funds.
This includes reviewing:
- super guarantee calculations
- payment dates
- clearing house confirmations
- salary sacrifice treatment
- unpaid or pending super amounts
- employee contribution classifications
Because in many EOFY reviews, the issue is not the calculation itself, it’s the disconnect between payroll records and actual remittance activity.
4. Review Employee Setup and STP Coding Accuracy
STP Phase 2 has made payroll reporting far more detailed than it was a few years ago.
Which means coding accuracy now matters more than many firms expected.
Before finalisation, firms should review employee data carefully, including:
- TFNs and employee details
- termination codes
- income types
- allowance categories
- leave classifications
- contractor versus employee setup
- salary sacrifice reporting categories
Incorrect classifications can affect employee income statements, tax return prefilling, and overall STP reporting accuracy.
And these are often the kinds of issues discovered only after finalisation pressure has already started building.
5. Confirm Finalised STP Data Aligns with ATO Prefill Information
Once STP is finalised, employee income statement data flows directly into ATO prefill systems used during tax return preparation.
If payroll reporting has not been reviewed properly beforehand, firms often end up dealing with:
- amended STP events
- revised income statements
- employee queries
- delayed tax return processing
- additional review cycles during peak periods
That’s why many CPA firms now treat STP finalisation as a broader EOFY quality-control process not just a payroll submission task.
Because by the end of June, the pressure rarely comes from one major payroll issue. It usually comes from multiple small inconsistencies discovered too late.
If any check reveals a discrepancy, lodge an STP update event to correct it before finalising. Submitting a finalisation over an unresolved error does not fix it, it confirms it to the ATO as accurate.
How to Fix STP Reporting Errors After June 30
Found an error after EOFY? The correction pathway is an STP update event, lodged through the client’s payroll software. It corrects year-to-date figures without requiring a full re-submission but timing matters.
STP corrections after June 30 need to happen as early as possible. The longer an error sits, the higher the chance that employee tax returns are processed against the wrong data. Once that happens, you are not just fixing an STP record you are coordinating an amended tax return as well.
Acting early to fix STP reporting errors keeps the correction contained to a single update event. Delayed action can cause errors to flow into individual tax assessments requiring multi-step remediation that takes far more time and effort to resolve.
Which Clients Need Priority Attention?
Certain client profiles consistently present higher STP reporting risks due to complexity, manual interventions, or structural payroll variations. Not every client carries equal risk. When planning your post-EOFY reviews, these categories consistently present the highest likelihood of STP discrepancies:
- Closely held payee’s directors and family trust employees with irregular or non-standard pay arrangements.
- Clients who changed payroll software mid-year, where data migration may have introduced classification errors.
- Businesses that processed manual payroll adjustments outside their STP-enabled software
- Employers with reportable super contributions that must be disaggregated from standard super guarantee amounts under Phase 2 rules.
How Unison Globus Australia Supports CPA Firms at EOFY?
Running STP finalisation across a large client base is detailed, time-sensitive work. This is where structured payroll outsourcing services Australian CPA firms rely on can deliver real operational value.
Unison Globus Australia supports CPA firms with payroll processing, payroll reconciliation support, STP reporting, and year-end payroll reporting workflows designed to support accuracy and compliance readiness during peak reporting periods.
Our payroll outsourcing and processing services are built specifically for accounting and CPA environments, helping firms scale operational capacity without the overhead of expanding internal teams. This enables firms to maintain accuracy, meet ATO deadlines confidently, and reduce the operational pressure typically associated with EOFY payroll cycles.
Improve STP accuracy and EOFY payroll
control with structured offshore support.
Unison Globus Australia helps CPA firms manage payroll workloads with greater efficiency and compliance confidence. Speak to our experts to streamline your STP finalisation process and ensure error-free EOFY payroll reporting.
