Every time you pay your staff, the ATO now expects to hear about it — automatically, in detail, on or before payday. Single Touch Payroll is the digital reporting system that makes this happen, and its expanded version, Phase 2, is now the standard for every Australian employer. With the ATO using that data to power real-time compliance checks and, from 2026, to monitor payday super, getting Single Touch Payroll right has moved from a background admin task to something with real consequences. Understanding it properly is essential for anyone with employees.
This guide explains what Single Touch Payroll is, what Phase 2 requires, why it matters more in 2026, and how to stay compliant — written in plain terms for Australian trades, construction and professional-services owners. It’s general information, not tax or payroll advice.
WHAT IS SINGLE TOUCH PAYROLL?
Single Touch Payroll, or STP, is an ATO system requiring employers to report payroll information — wages, tax withheld and super — electronically each time they run payroll, using STP-enabled software. Instead of preparing annual payment summaries, the data flows to the ATO automatically with every pay run.
It applies to essentially all employers. Single Touch Payroll is mandatory for Australian businesses with employees, regardless of size — even a business with a single employee must report through STP on or before each payday.
WHAT STP PHASE 2 REQUIRES
Single Touch Payroll expanded significantly with Phase 2, which is now the standard reporting method with no further transition. Where the original version reported a single gross figure, Phase 2 requires you to break down pay into detailed components — separating salary and wages, different allowance types, deductions, paid leave, and lump sum payments.
This granularity is the heart of Phase 2. Single Touch Payroll now gives the ATO detailed, classified data on every pay event, which means correct set-up of income types, allowances and payment components matters more than ever — misclassification is a common and consequential error.
WHY IT MATTERS MORE IN 2026
Single Touch Payroll has become more than a reporting obligation. The ATO uses the real-time data to run automated compliance checks, pre-fill employees’ tax information, and integrate with other agencies — so errors surface quickly as “action required” notifications and can trigger review.
The 2026 link to payday super raises the stakes further. With super moving to a payday basis, the detailed classification in your Single Touch Payroll reporting becomes the input the ATO uses to monitor super obligations, so getting your payroll classifications right directly affects your super compliance too.
HOW TO STAY COMPLIANT
1. Use STP-enabled software
Make sure your payroll software is STP Phase 2 compliant and up to date. Single Touch Payroll requires proper software, not spreadsheets or manual methods.
2. Classify pay correctly
Set up income types, allowances and payment components accurately. Correct classification is where most Single Touch Payroll errors occur, so it’s worth getting right.
3. Report on or before payday
Submit your STP report each pay run on or before the payment date. Timely reporting every cycle is the core obligation.
4. Handle terminations properly
Report termination payments correctly at the time of payment, with the right codes. Termination coding is a common Single Touch Payroll error worth attention.
5. Finalise each year
Complete your end-of-year STP finalisation so employees can lodge their tax returns. Finalisation is the annual step that closes the loop.
WHY CORRECT CLASSIFICATION IS EVERYTHING
If there’s one thing that separates smooth Single Touch Payroll compliance from a stream of ATO notifications, it’s accurate classification. Under Phase 2, gross pay has to be broken into the right components — salary and wages, overtime, specific allowance types, bonuses, leave, lump sums — and each has to be coded correctly. Get these wrong and the consequences ripple outward: employees’ income statements in myGov become inaccurate, which can affect their tax returns and entitlements; your PAYG on the BAS may not reconcile to your STP data, triggering automated ATO review; and, increasingly, misclassified amounts can distort the super calculations the ATO now monitors. The good news is that modern payroll software handles most of this automatically once pay items are set up correctly — which is exactly why the initial set-up, and a periodic check that it’s still right, is time so well spent. Single Touch Payroll rewards getting the foundations correct and quietly punishes leaving them to chance.
SINGLE TOUCH PAYROLL FOR TRADES AND CONSTRUCTION
For trades and construction businesses, Single Touch Payroll deserves particular care for a couple of reasons. First, these businesses often pay a mix of wages, allowances (travel, tools, site allowances) and overtime, all of which need correct Phase 2 classification — a common source of errors. Second, the sector’s heavy use of subcontractors makes the employee-versus-contractor line important, because genuine employees must be in STP while genuine contractors are reported differently (and some, in building and related industries, through the Taxable Payments Annual Report). Misclassifying a worker as a contractor doesn’t just risk sham-contracting issues; it also means missing their Single Touch Payroll reporting, with the same penalties as missing it for any employee. Getting your payroll set-up and worker classifications right keeps a trade business on the right side of both obligations.
COMMON SINGLE TOUCH PAYROLL MISTAKES TO AVOID
- Misclassifying pay components. Wrong income-type or allowance coding is the most common Single Touch Payroll error and triggers ATO review.
- Using non-compliant tools. Spreadsheets or outdated software can’t meet STP Phase 2 requirements.
- Reporting late. STP must be lodged on or before each payday, not at year-end.
- Forgetting finalisation. Missing the annual finalisation leaves employees unable to lodge their returns properly.
Getting payroll and compliance right is core ACS Consulting work. The Operations & Process Improvement service builds accurate, reliable payroll processes that keep Single Touch Payroll compliant, while the SME Data Analysis & Power BI service helps you keep payroll data clean and reconciled, and the Strategy & Business Planning service treats compliance as part of running the business well. The free Perth SME Operational Audit Checklist helps you find where your processes need tightening. For authoritative guidance, the Australian Taxation Office on STP, the Australian Government’s resources on employing people, and digital tools resources are the references to use. As this isn’t tax advice, confirm the current requirements and speak to your accountant or bookkeeper.
FREQUENTLY ASKED QUESTIONS
What is Single Touch Payroll?
Single Touch Payroll (STP) is an ATO system requiring employers to report payroll information — wages, tax withheld and super — electronically each time they run payroll, using STP-enabled software. The data flows to the ATO automatically with every pay run, replacing annual payment summaries.
Is Single Touch Payroll mandatory for small businesses?
Yes. Single Touch Payroll is mandatory for essentially all Australian employers regardless of size, including businesses with just one employee. You must report through STP-enabled software on or before each payday, so it applies to almost every business that pays staff.
What does STP Phase 2 require?
Phase 2 requires breaking pay down into detailed components rather than a single gross figure — separating salary and wages, different allowance types, deductions, paid leave and lump sum payments, along with employment and tax details. This gives the ATO granular, classified data on every pay event.
Why does correct classification matter so much?
Because misclassified pay components make employees’ myGov income statements inaccurate, can stop your PAYG reconciling to STP data (triggering ATO review), and increasingly affect the super calculations the ATO monitors. Correct set-up of pay items is what keeps Single Touch Payroll smooth and compliant.
CONCLUSION
Single Touch Payroll requires reporting payroll to the ATO every payday, and Phase 2 — now the standard — demands detailed, correct classification of every pay component. Use compliant software, classify pay accurately, report on time, handle terminations properly, and finalise each year.
With the ATO using Single Touch Payroll data for real-time compliance and payday super monitoring in 2026, getting your classifications right is more important than ever — and mostly comes down to setting up your payroll properly and keeping it that way. As this isn’t tax advice, confirm the details with your accountant.
Need expert guidance for your business?
ACS Consulting
Website: acsconsulting.com.au
Email: zoey@acsconsulting.com.au
Phone: 0452 665 021
Contact ACS Consulting today to discuss your business goals and discover practical solutions that drive measurable results.