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If you run a business in Australia, lodging your Business Activity Statement (BAS) is not optional - it's a legal requirement. Yet it remains one of the most common sources of confusion, missed deadlines, and unnecessary penalties for small and medium businesses.

Whether you're a sole trader, a growing construction firm, or a property developer managing multiple entities, understanding your BAS obligations is critical to staying compliant and managing your cash flow effectively.

What is a Business Activity Statement?

A BAS is a form submitted to the Australian Taxation Office (ATO) by registered businesses to report and pay several tax obligations. It's essentially a summary of all the taxes you have paid or need to pay during a specified period. You can learn more about BAS requirements on the ATO's official BAS page.

The taxes reported through your BAS can include:

The type and amount of taxes you're required to report depend on factors such as your business size, number of employees, the benefits you offer, and the products or services you provide.

How Often Do You Need to Lodge?

The ATO determines your BAS lodgement cycle, and it's important you meet the deadlines - penalties apply if you're late.

Most small to medium businesses fall into the quarterly cycle, which means four lodgements per year - each with a strict due date.

Key Due Dates You Need to Know

If you lodge your own BAS, quarterly lodgements are due on the 28th of the month following the end of each quarter:

Pro tip: If you use a registered BAS agent like Reacco, you typically get an extended lodgement date - usually two months after the end of the quarter. That's one of the many advantages of working with a professional.

For monthly reporters, the due date is the 21st of the following month. And if any due date falls on a weekend or public holiday, you have until the next business day.

What Happens If You Lodge Late?

Missing your BAS deadline can result in penalties and interest charges from the ATO. The penalties compound over time, and even a genuine oversight can become costly.

Importantly, even if you can't pay the amount owing by the due date, you should still lodge your BAS on time. This shows the ATO you're aware of your obligations and acting in good faith - and it reduces the risk of additional penalties.

Why Use a Registered BAS Agent?

Yes, you can lodge your BAS yourself through the ATO Business Portal or myGov. But many business owners choose to work with a registered BAS agent - and for good reason.

A registered BAS agent is a qualified professional authorised by the Tax Practitioners Board (TPB) to provide BAS services. To maintain registration, they must meet strict education, experience, and ongoing professional development requirements.

The benefits of using a BAS agent include:

Using a BAS agent is often a better option if you're short on time, have employees or complex GST transactions, or have a history of lodging late or making errors.

What If Your BAS Lodgements Are Overdue?

It happens. Maybe you were too busy, the forms were too complicated, or something came up that threw your schedule off. Whatever the reason, overdue BAS lodgements are more common than you'd think - and with the right help, the problem can be fixed.

The most important step is to get back on track as soon as possible. At Reacco, we've dealt with all types of overdue situations and can help you bring everything up to date - including managing any penalties or interest that may have accrued.

Good Recordkeeping Makes BAS Easy

Clean records are the foundation of a smooth BAS process. A few habits that make all the difference:

Using cloud accounting software like Xero - which Reacco is a certified partner of - makes recordkeeping seamless and gives both you and your BAS agent real-time visibility over your numbers.

How Reacco Handles Your BAS

When you partner with Reacco, your dedicated BAS agent will:

We also provide reminders and ongoing support so you never miss a deadline again. It's BAS lodgement, made simple.

Final Thoughts

BAS lodgement is one of those obligations that can quietly spiral into a real problem if neglected. Late lodgements, incorrect reporting, and poor recordkeeping all compound - leading to penalties, cash flow surprises, and unnecessary stress.

But it doesn't have to be that way. With the right systems, the right software, and the right BAS agent in your corner, it becomes a routine, low-stress part of running your business.

If your BAS lodgements could use a professional hand - or if you've fallen behind and need to catch up - get in touch with Reacco. We're registered BAS agents based in Perth, and we're here to help.