Fixing STP Errors Under Payday Super in Australia 2026: A Bookkeeper's Guide to ATO Correction Procedures

Since the introduction of Payday Super on 1 July 2026, Australian employers and their bookkeepers have been navigating a more complex Single Touch Payroll (STP) reporting environment. When errors occur in payroll data — and they inevitably do — the process for correcting them has become more nuanced. Understanding the ATO's correction procedures for both general STP errors and the new Payday Super-specific requirements is essential for maintaining compliance and protecting both employers and employees.

Understanding STP Corrections and Amendments

Single Touch Payroll requires employers to report payroll information — including gross payments, tax withheld, and superannuation — to the ATO each time employees are paid. Because this data flows directly to the ATO and pre-fills employee tax returns, errors in STP reporting can have downstream consequences for both the employer's tax obligations and the employee's personal tax position.

The ATO distinguishes between two types of STP corrections. A fix is a correction to information that was reported incorrectly — for example, a data entry error or a payroll setup mistake. A finalisation amendment is a correction made after the employer has submitted their end-of-year STP finalisation declaration. Each type of correction has different timing requirements and procedural rules.

Importantly, corrections are distinct from late lodgements. The ATO's correction procedures apply only to information that was already reported but was incorrect. Failures to lodge STP reports on time are a separate compliance matter and are not addressed through the correction process.

General STP Correction Procedures

For general payroll corrections — those not related to Payday Super qualifying earnings — the ATO's requirements are as follows:

• Timing — Corrections must be reported within 14 days of identifying the error, or included in the next regular pay event within the same financial year, whichever comes first
• Method — Corrections should be made through the employer's payroll software by updating the year-to-date (YTD) figures. The corrected YTD amounts will override the previously reported figures
• PAYG withholding adjustments — If a correction affects previously reported PAYG withholding, employers may revise the activity statement for the earlier period. For small withholders, corrections within established materiality thresholds (generally $2,500) may be carried forward to the current period rather than requiring an amended activity statement
• Overpayments — If an employee was overpaid within the same financial year, the employee repays the net amount and the employer updates the YTD figures via the next pay cycle or an update event. The gross payment and tax figures must both be corrected to reflect the actual amounts
• Prohibited practices — Full file replacements must not be used for corrections. They are limited to replacing the latest pay event file in specific instances of file corruption and cannot be used to replace update events

Fixing STP Errors Under Payday Super

From 1 July 2026, STP reporting under Payday Super requires employers to include two new data fields: qualifying earnings and superannuation liability as YTD amounts. These fields are used by the ATO to calculate whether the employer has met their super guarantee obligations for each payday. Errors in these fields can trigger incorrect super guarantee charge (SGC) calculations, making timely correction critical.

Fixing Qualifying Earnings Errors

Qualifying earnings are the earnings on which the super guarantee is calculated. If an error occurs in reporting qualifying earnings — for example, due to a payroll setup issue or a data entry mistake — the correction process is as follows:

• Update the YTD amount — Employers must update the qualifying earnings YTD amount in their payroll software, either during the next pay event or through a standalone update event
• ATO recalculation — The ATO will recalculate the super guarantee amount based on the corrected YTD data. If a correction reduces the reported qualifying earnings, no new earnings are calculated until a later increase occurs in the YTD figures
• Maintain documentation — Employers must retain documentation as evidence for any qualifying earnings corrections, particularly those relating to earlier paydays. This documentation may be required if the ATO queries the correction
• Notify affected employees — Where a qualifying earnings correction affects an employee's super entitlements, employers should notify the employee of the change and the reason for it

Fixing Superannuation Liability Errors

Superannuation liability figures reported through STP are used by the ATO to verify that employers are paying the correct amount of super on time. Errors in these figures can result in incorrect SGC assessments. Corrections follow the same general process as qualifying earnings corrections — update the YTD figure in the next pay event or update event, maintain documentation, and notify affected employees where appropriate.

Post-Finalisation Amendments

If an error is identified after the employer has submitted their end-of-year STP finalisation declaration, the correction process is more involved. Post-finalisation amendments must be lodged as soon as possible after the error is identified. The ATO requires employers to:

• Submit an amended finalisation declaration through their payroll software
• Inform affected employees of the amendment, as they may need to amend their personal tax returns if the error affected their income or withholding figures
• Retain documentation of the error, the correction, and the notification to employees

Post-finalisation amendments that affect an employee's income statement can delay the employee's ability to lodge their tax return, as the ATO's pre-fill data will not be updated until the amendment is processed. Bookkeepers should advise employers to prioritise post-finalisation amendments to minimise disruption to employees.

Common Mistakes and Red Flags

Bookkeepers and employers frequently make the following mistakes when correcting STP errors, particularly under the new Payday Super framework:

• Using full file replacements for corrections — This is explicitly prohibited by the ATO and can create data integrity issues in the ATO's systems. Always use update events or the next pay event for corrections
• Failing to correct both gross and tax figures — When correcting an overpayment or underpayment, both the gross payment and the PAYG withholding figures must be updated. Correcting only one creates a mismatch that can trigger ATO queries
• Delaying corrections beyond 14 days — The ATO's 14-day correction window is a compliance requirement, not a guideline. Corrections made outside this window without a valid reason may attract penalties
• Neglecting qualifying earnings corrections under Payday Super — Because qualifying earnings are a new data field, some payroll systems and bookkeepers are not yet familiar with the correction process. Errors in qualifying earnings that are not corrected promptly can result in incorrect SGC calculations and potential penalties
• Failing to notify employees of post-finalisation amendments — Employees have a right to know when their income statement has been amended, particularly if the amendment affects their tax return. Failure to notify can damage the employer-employee relationship and may have legal implications
• Inadequate documentation — The ATO may request evidence of corrections, particularly for Payday Super qualifying earnings corrections. Bookkeepers should maintain a correction log that records the nature of each error, the correction made, and the date of correction

Australian Regulatory Context

STP corrections and Payday Super compliance sit within a broader regulatory framework administered by the ATO:

• Single Touch Payroll Phase 2 — STP Phase 2, which expanded the range of data reported through STP, has been in effect since 2022. Employers must ensure their payroll software is fully Phase 2 compliant before attempting to correct STP data, as Phase 1 correction methods may not be compatible with Phase 2 reporting requirements
• Payday Super (from 1 July 2026) — The Payday Super regime requires employers to pay super at the same time as wages, rather than quarterly. STP reporting now includes qualifying earnings and superannuation liability as YTD fields, and the ATO uses this data to monitor compliance in near real-time
• Super Guarantee Charge (SGC) — Employers who fail to pay the correct amount of super on time are liable for the SGC, which includes the unpaid super, an interest component, and an administration fee. Accurate STP reporting — including timely corrections — is essential for avoiding SGC liability
• Tax Practitioners Board (TPB) — Bookkeepers who are registered BAS agents with the TPB are subject to the Code of Professional Conduct, which requires them to act with integrity and in the best interests of their clients. This includes advising clients promptly when STP errors are identified and ensuring corrections are made within the required timeframes
• PCG 2026/1 — The ATO's Practical Compliance Guideline 2026/1 provides guidance on the ATO's compliance approach to Payday Super, including the circumstances in which the ATO will exercise discretion in applying penalties for early-stage compliance issues

Checklist: STP Correction Best Practices

Use the following checklist to ensure your STP correction processes are compliant and efficient:

1. Identify the error and determine whether it relates to general payroll data or Payday Super qualifying earnings or superannuation liability
2. Determine whether the error occurred before or after the end-of-year finalisation declaration
3. For pre-finalisation errors: correct the YTD figures in your payroll software within 14 days of identifying the error, or include the correction in the next pay event
4. For post-finalisation errors: submit an amended finalisation declaration as soon as possible and notify affected employees
5. For PAYG withholding corrections: assess whether an amended activity statement is required or whether the correction can be carried forward within materiality thresholds
6. For Payday Super qualifying earnings corrections: update the YTD amount, retain documentation, and notify affected employees where super entitlements are affected
7. Record all corrections in a correction log, including the nature of the error, the correction made, and the date
8. Review payroll setup and processes to identify and address the root cause of the error to prevent recurrence

How MyMoney® Can Help

Navigating STP corrections and Payday Super compliance requires a bookkeeper who is not only technically proficient with payroll software but also up to date with the ATO's evolving requirements. The introduction of Payday Super has added new complexity to payroll compliance, and errors that are not corrected promptly can have significant financial consequences for employers.

MyMoney® connects Australian businesses with qualified, registered bookkeepers who have demonstrated expertise in STP Phase 2, Payday Super, and ATO compliance. Whether you need ongoing payroll management, a one-off correction review, or help transitioning to Payday Super, our marketplace makes it easy to find the right professional.

Post a Brief to describe your bookkeeping and payroll needs and receive proposals from qualified professionals, or Browse Bookkeepers on the MyMoney® Marketplace to find specialists with the STP and Payday Super expertise your business requires.