Important ATO Deadlines and BAS Lodgements for 2026: What Australian Businesses Need to Know

Staying on top of ATO deadlines is one of the most important aspects of successful bookkeeping and business compliance. Missing BAS lodgement dates, PAYG obligations, or superannuation deadlines can lead to penalties, interest charges, and unnecessary stress for business owners.

With the 2026–27 financial year now underway and Payday Super in effect, Australian businesses should ensure they have systems in place to manage their reporting and compliance obligations efficiently.

Key BAS and Activity Statement Deadlines

Businesses that lodge monthly BAS or IAS reports should note the following upcoming due dates:

July 2026 Activity Statement
Due: 21 August 2026

August 2026 Activity Statement
Due: 21 September 2026

Ensuring your bookkeeping records are accurate and up to date before these deadlines can help avoid last-minute errors and lodgement delays.

Quarterly BAS Due Dates

For businesses lodging quarterly activity statements, the next key deadlines are:

June Quarter 2026 BAS
(Including PAYG Instalments)
Due: 28 July 2026

September Quarter 2026 BAS
(Including PAYG Instalments)
Due: 28 October 2026

If a due date falls on a weekend or public holiday, lodgement and payment can generally be made on the next business day.

Superannuation Obligations Have Changed

The June 2026 quarter marked the final quarter under the traditional superannuation payment timetable.

April to June 2026 Super Contributions

Employer contributions for this period were required to be received by employees’ super funds by 28 July 2026.

From 1 July 2026, however, Australian employers are now operating under the new Payday Super framework. Superannuation contributions must be paid within seven calendar days of payday, creating a much closer connection between payroll processing and super compliance.

Why Accurate Bookkeeping Matters More Than Ever

With BAS reporting, payroll compliance, PAYG obligations, GST management, and Payday Super requirements all occurring throughout the year, maintaining accurate financial records is essential.

Strong bookkeeping practices help businesses:

  • Meet ATO reporting deadlines.
  • Improve cash flow visibility.
  • Avoid late lodgement penalties.
  • Ensure payroll and superannuation compliance.
  • Make informed business decisions.

Businesses that wait until BAS lodgement is due often find themselves rushing to reconcile accounts and locate missing information, increasing the risk of costly errors.

Simple Ways to Stay Compliant

To keep your business on track throughout the financial year:

  • Reconcile bank accounts regularly.
  • Complete payroll processing promptly.
  • Review GST coding and transactions monthly.
  • Monitor Payday Super contributions after each pay run.
  • Set calendar reminders ahead of ATO due dates.
  • Work with a qualified bookkeeper to maintain accurate records.

Taking a proactive approach can significantly reduce compliance risks and save valuable time.

Partner With Numeris for Bookkeeping and BAS Support

Navigating ongoing ATO obligations can be challenging for busy business owners. At Numeris, we help Australian businesses manage BAS lodgements, payroll, superannuation compliance, and day-to-day bookkeeping with confidence. Whether you need assistance preparing for upcoming BAS deadlines, managing Payday Super requirements, or improving your bookkeeping processes, our team can help ensure your business stays compliant and organised throughout the year.

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