BAS Due Dates

Keeping on top of your Business Activity Statement (BAS) is non-negotiable, and thankfully, the BAS due dates for 2025 follow a predictable quarterly rhythm. Typically, your BAS is due on the 28th of the month right after the end of a quarter.

What You'll Learn

• Your Quick Reference Guide to 2025 BAS Due Dates
• A Detailed Look at Quarterly BAS Deadlines
• Monthly and Annual BAS Lodgements: Who Fits Where?
• The Strategic Advantage of Using a Registered Agent
• Understanding the Penalties for a Late BAS

For instance, the BAS for the October-December 2024 quarter needs to be lodged by 28 February 2025. Similarly, the January-March 2025 quarter has a deadline of 28 April 2025. Hitting these dates is absolutely essential if you want to steer clear of penalties from the Australian Taxation Office (ATO).

Your Quick Reference Guide to 2025 BAS Due Dates

So, what exactly is a Business Activity Statement? It’s a reporting form that any Australian business registered for Goods and Services Tax (GST) has to lodge with the ATO. It’s designed to bundle several tax obligations into one report, making it simpler to stay compliant. If your business turns over less than $20 million in GST, you'll almost certainly be reporting on a quarterly basis.

This guide lays out the key lodgement and payment deadlines for the 2025 calendar year. Knowing these dates is the first step toward managing your business's financial health and avoiding unnecessary fines. The timeline below gives you a quick visual summary of the different reporting schedules—monthly, quarterly, and annual—that apply to different businesses.

The key takeaway here is pretty clear: your lodgement frequency is directly tied to the size and turnover of your business, with the vast majority of small businesses landing in that quarterly cycle.

Who Needs to Lodge a BAS?

First things first, you need to be certain about your obligations. You're required to lodge a BAS if your business is registered for GST. This kicks in for most businesses once their annual turnover hits $75,000 or more (or $150,000 for non-profits).

Your BAS is used to report on a few key tax areas all at once:

• Goods and Services Tax (GST) you've collected on sales, minus any GST credits you can claim on purchases.
• Pay As You Go (PAYG) Withholding for the tax you’ve withheld from employee salaries.
• Pay As You Go (PAYG) Instalments to cover your own estimated income tax bill.
• Other taxes like fringe benefits tax (FBT) or fuel tax credits, if they apply to you.

If you want to get a better handle on what a BAS involves and why it's such a fundamental part of business accounting, our detailed article explains what BAS is in accounting. Having that foundational knowledge makes navigating the BAS due dates for 2025 a whole lot easier.

A Detailed Look at Quarterly BAS Deadlines

For most small businesses in Australia, lodging your BAS quarterly is the standard. It’s the default rhythm for keeping on top of your tax obligations. This applies to any business with a GST turnover of less than $20 million, and it strikes a good balance between staying compliant and not getting buried in paperwork. Getting these BAS due dates for 2025 right is one of the fundamentals of keeping the ATO happy.

The quarterly system simply chops the financial year into four reporting periods. For each quarter, you’ll need to pull together your GST info, PAYG withholding, and any other relevant tax figures, then lodge and pay by a set date. The deadlines are predictable, which helps a lot when you’re trying to plan your bookkeeping and manage cash flow.

Key Quarterly BAS Periods and Dates for 2025-2026

It's easy to get mixed up, as the 2025 calendar year straddles two different Australian financial years. You have to be careful to track the deadlines for both to make sure nothing slips through the cracks.

Here are the specific quarterly deadlines you need to circle in your calendar.

Covering the 2024-2025 Financial Year:

• Quarter 2 (October - December 2024): Due by 28 February 2025
• Quarter 3 (January - March 2025): Due by 28 April 2025
• Quarter 4 (April - June 2025): Due by 28 July 2025

Covering the 2025-2026 Financial Year:

• Quarter 1 (July - September 2025): Due by 28 October 2025
• Quarter 2 (October - December 2025): Due by 28 February 2026

Just remember, if a due date lands on a weekend or public holiday, the ATO gives you a pass—you can lodge and pay on the next business day without any drama.

The Power of Using a Registered BAS Agent

Handing your BAS over to a professional does more than just give you peace of mind. It unlocks some serious perks, with the biggest one being deadline extensions. The ATO offers concessional lodgement programs exclusively to registered BAS and tax agents, giving their clients a valuable buffer to get their books finalised.

Let's put that into perspective. Imagine you run a busy cafe in Sydney. You're juggling suppliers, staff, and customers, and suddenly the Quarter 1 BAS deadline for the 2025-26 financial year is staring you down. That period, from 1 July to 30 September 2025, has a standard lodgement date of 28 October 2025 if you're lodging it yourself.

But if you work with a registered BAS agent who lodges it electronically for you, that deadline gets pushed back to 25 November 2025. That extra month can be a complete lifesaver, giving you time to reconcile everything properly without the last-minute panic. You can find more details on how these extensions work across different quarters by exploring lodgement date insights from tax professionals.

This extension provides crucial breathing room, turning a stressful compliance scramble into a structured, calm process. It gives you and your agent the time needed to ensure total accuracy, seriously cutting down the risk of mistakes and a potential ATO audit.

Monthly and Annual BAS Lodgements: Who Fits Where?

While most businesses get into a comfortable quarterly BAS rhythm, your reporting schedule isn't a one-size-fits-all deal. The Australian Taxation Office (ATO) actually sets your frequency based on your turnover, creating different rules for big players and tiny operators. Knowing exactly where your business stands is key to hitting the right BAS due dates in 2025.

For the big end of town, the cycle is much faster. If your business has a GST turnover of $20 million or more, you’re on the hook for monthly BAS lodgements. This keeps a steady stream of tax information and payments flowing to the ATO, which makes sense given the sheer volume of transactions these larger companies handle.

This monthly schedule also helps big businesses manage their tax liabilities in smaller, more predictable chunks, which is a massive help for accurate cash flow forecasting.

Monthly Lodgement Deadlines

The rule for monthly lodgers is beautifully simple: your BAS is due on the 21st day of the month right after the end of the reporting period. Critically, there are no lodgement extensions available from registered agents for monthly BAS, so this date is set in stone.

• Example for a large wholesaler: Imagine a large import-export company in Sydney with a GST turnover of $25 million. They have to report monthly. For all their business activity in January 2025, their BAS lodgement and payment deadline is 21 February 2025. For February's activity, the due date is 21 March 2025, and so on throughout the year.

This constant rhythm keeps their financial data current and makes tax compliance a regular part of their monthly accounting process, rather than a monster task that builds up every quarter.

Annual Lodgement Rules and Dates

On the complete opposite end of the scale, some very small businesses can radically simplify their paperwork by reporting just once a year. This option is generally available to businesses that have voluntarily registered for GST and have an annual GST turnover of less than $75,000 (or $150,000 for non-profits).

The standard due date for an annual BAS is 31 October, following the end of the financial year. Conveniently, this lines up with the deadline for individual tax returns, letting business owners tackle both obligations in one go.

A sole trader running a small online craft store who voluntarily registered for GST is a perfect example. Annual reporting is a game-changer for them. Instead of wrestling with quarterly paperwork, they can consolidate all their GST info for the 2024-25 financial year and lodge their single BAS by 31 October 2025.

There's a handy exception, too. If you aren't required to lodge a tax return, the deadline for your annual BAS is pushed out to 28 February of the following year. And, as always, using a registered tax or BAS agent often opens up different due dates, making life even easier for micro-businesses.

The Strategic Advantage of Using a Registered Agent

Managing your Business Activity Statements is about more than just hitting deadlines. It's a core financial task where getting the numbers right is everything. Bringing a registered BAS or tax agent on board isn't just about outsourcing the work; it's a strategic move that turns a stressful compliance chore into a smoothly managed part of your business.

These professionals bring the expertise needed to sidestep the kind of costly errors that can quickly attract the wrong sort of attention from the Australian Taxation Office (ATO).

More importantly, working with a registered agent gets you access to the ATO's lodgement concession program. This is a game-changer for many businesses, as it provides valuable extensions on your quarterly BAS due dates for 2025. That extra time isn't just a buffer—it's crucial breathing room to get your accounts finalised without rushing. You can do a proper reconciliation, ensuring every GST credit is claimed and every dollar of PAYG withholding is accounted for correctly.

Comparing Due Dates: A Clear Advantage

The difference in deadlines between lodging yourself and using an agent is significant. This isn't just about avoiding a late lodgement; it’s a smart way to manage your finances better.

Let's look at a straight comparison for the main quarterly periods in the 2025-26 financial year:

Reporting Period (2025-26)Standard Due Date (Self-Lodged)Registered Agent Due DateExtra Time Gained

Quarter 1 (Jul - Sep 2025)

28 October 2025

25 November 2025

4 weeks

Quarter 3 (Jan - Mar 2026)

28 April 2026

26 May 2026

4 weeks

Quarter 4 (Apr - Jun 2026)

28 July 2026

25 August 2026

4 weeks

As you can see, you get an entire extra month for most quarters. The one exception is Quarter 2 (covering Oct-Dec), where the standard 28 February deadline already accounts for the Christmas and New Year break, so no further agent extension is typically offered. This extra time allows you to finalise your records without being under the pump, which always leads to better quality reporting.

Beyond Extensions: The Broader Benefits

The real value of using a registered agent goes well beyond just getting more time. Their expertise acts as a powerful defence against the financial pain and administrative headaches that come with non-compliance.

• Fewer Mistakes: Agents are trained to spot the common slip-ups in GST calculations, payroll figures, and income reporting. This protects you from those unintentional errors that could easily trigger an audit.
• Less Stress: Handing off the complexities of BAS prep frees up your time and mental energy. It lets you get back to focusing on what you do best—running and growing your business.
• Proactive Tax Management: A good agent does more than just lodge forms. They'll offer advice on managing cash flow around your BAS payments and keep you up to speed on any changes in tax law that affect you.

By bringing in an agent, you’re not just buying time. You're investing in accuracy, compliance, and genuine peace of mind. This proactive step dramatically reduces your risk of copping the Failure to Lodge penalties and General Interest Charges we detail in our section on penalties.

Understanding the Penalties for a Late BAS

Missing one of the key BAS due dates in 2025 is more than just a minor slip-up; it can trigger some pretty significant and escalating financial penalties from the Australian Taxation Office (ATO). The consequences go far beyond a simple late fee, hitting your business's cash flow and damaging your compliance record. Knowing what these penalties are is the first step to making sure you never have to pay them.

The main penalty you’ll face for missing a deadline is the Failure to Lodge (FTL) penalty. This is an automated system that applies a fine for every 28-day period (or even part of a period) that your BAS is outstanding. The amount isn't arbitrary—it's calculated using a system of penalty units, which the government adjusts from time to time.

How FTL Penalties Are Calculated

The size of the FTL penalty is directly tied to the size of your business. The ATO does this to ensure the fines are proportionate to turnover, but it means bigger businesses feel the sting much more.

• Small entities: If your business has a turnover of less than $1 million, you'll face a penalty for each 28-day block, capped at five penalty units.
• Medium entities: For businesses with turnover from $1 million up to $20 million, that penalty rate is doubled.
• Large entities: For those with turnover exceeding $20 million, the penalty rate is five times the base amount.

This tiered system means that an oversight that costs a small business a few hundred dollars could easily cost a larger company thousands for the exact same mistake.

The Real Cost of a Late BAS

Let's break it down with an example. A single penalty unit is currently $330. If a small business lodges its BAS just one day late, it immediately gets hit with a $330 penalty. If that BAS is still unlodged 30 days later, another $330 penalty is applied, bringing the total to $660. This can climb up to a maximum of $1,650 for a single late statement.

The reality is that the ATO is ramping up its enforcement activities. The penalty system works a bit like driver demerit points—initial fines get worse with each overdue cycle, hitting repeat offenders the hardest. With over 14.1 million individual tax returns lodged by April 2025 (a 3% jump from the previous year), it’s clear that more people are coming under increased ATO scrutiny.

On top of the FTL penalty, the ATO also applies a General Interest Charge (GIC) on any unpaid tax. This isn't a one-off charge; it's calculated daily and compounds, meaning your debt just keeps growing until both the outstanding tax and the FTL penalty are paid in full.

This one-two punch of penalties makes late lodgement a very expensive mistake. If you do find yourself falling behind, our guide on managing late BAS payments offers practical strategies to get back on track.

A Practical Checklist for Accurate BAS Preparation

Good preparation is the secret to lodging a Business Activity Statement without the usual last-minute panic. If you’re systematic about it, you can avoid common mistakes, claim every credit you're entitled to, and have everything ready long before the BAS due dates in 2025. A simple checklist can turn what feels like a complex chore into a manageable process.

This is a tool that helps you pull your financial data together methodically, whether you're lodging the BAS yourself or just getting the figures ready for your accountant. It's really about building a solid, repeatable habit that cleans up your bookkeeping and gives you real confidence in the numbers you're reporting.

To make this even easier, we've put together an actionable checklist. You can use this table each quarter to track your progress and make sure nothing gets missed.

Quarterly BAS Preparation Checklist

TaskStatus (To Do / Complete)Notes

FINANCIAL RECONCILIATION

Reconcile all bank & credit card accounts

Match all transactions in your accounting software.

Clear out any 'suspense' or unallocated accounts

Every transaction needs a proper home.

Review accounts receivable and payable reports

Ensure invoices/bills are in the correct period.

GST & SALES VERIFICATION

Check all sales for correct GST coding

GST-free vs. taxable sales.

Verify you have a valid tax invoice for all GST credits claimed

No tax invoice = no GST credit claim.

Review non-deductible expenses (e.g., entertainment)

Make sure you haven't claimed GST on these.

PAYROLL & PAYG

Reconcile PAYG withholding from payroll reports to the ledger

The figures must match perfectly.

Confirm gross wages reported on the BAS match payroll summaries

A common ATO check area.

FINAL REVIEW & LODGEMENT

Generate BAS report from software and review all figures

Do the numbers look reasonable?

Lodge the BAS via your preferred method

E.g., Online services for business, registered agent.

Set a reminder for the payment due date

Lodge and pay are separate steps!

Following these steps methodically will put you in a great position for a smooth, accurate BAS lodgement every single time. Now, let's break down the key areas in more detail.

Financial Reconciliation and Review

Before you even glance at the BAS form, your core financial accounts need to be spot-on. This is the foundation, and getting it right is non-negotiable for correct reporting.

• Reconcile All Bank Accounts: Go through every transaction in your business bank accounts, credit cards, and loan accounts. Make sure they are all matched and accounted for in your bookkeeping software. No exceptions.
• Clear Suspense Accounts: Take a look at your general ledger for anything sitting in "suspense" or "uncategorised" accounts. These are red flags. They must be properly allocated before you finalise your BAS.
• Review Accounts Receivable and Payable: Check that your outstanding invoices and bills are correctly dated. This ensures they land in the right reporting period, which is crucial for accurate GST timing.

To get your BAS right, you need to understand the mechanics behind the numbers. A great resource for this is a guide on how to work out VAT, as the principles of calculating tax on transactions are fundamental to GST.

GST and Sales Verification

Your Goods and Services Tax figures are the absolute heart of the BAS. A quick double-check here can prevent you from overpaying the ATO or, just as bad, claiming credits you aren't actually entitled to.

Honestly, the most common BAS errors we see come from incorrect GST coding. Taking ten minutes to review your sales and purchase transactions can save you from massive headaches and potential ATO penalties down the line.

Here’s exactly what to verify:

1. Check All Sales for Correct GST: Run a sales report and scan it to make sure GST has been applied to all your taxable sales. At the same time, confirm your GST-free sales are coded correctly.
2. Verify GST Credits on Purchases: Go through all your business purchases. You must hold a valid tax invoice for every single GST credit you intend to claim. The ATO is very strict on this.
3. Account for Non-Deductible Expenses: Look at expenses like client entertainment or certain travel costs to ensure you haven’t incorrectly claimed GST credits on them. It's an easy mistake to make.

Payroll and PAYG Withholding

Finally, your payroll data must line up perfectly with what you report on the Business Activity Statement. Any discrepancies here will eventually be flagged.

• Reconcile PAYG Withholding: Match the total PAYG withholding from your payroll reports for the quarter with the corresponding liability account in your general ledger. The two figures should be identical.
• Confirm Gross Wages: Ensure the total gross wages figure you report on the BAS is exactly what your payroll summary reports show for the period. This is another critical number the ATO uses for data matching.

How to Lodge and Pay Your BAS Correctly

Once your Business Activity Statement is prepared and looks spot on, the final steps are lodging the form and paying whatever you owe the Australian Taxation Office (ATO). The ATO has several electronic methods designed to make this whole process as painless as possible, helping you hit those crucial BAS due dates for 2025 without any last-minute panic.

For many business owners, the most direct path is using the ATO’s Online services for business. It’s a secure government portal where you can lodge your BAS, look at old statements, and manage your tax accounts from one spot. It's a reliable, straightforward option if you handle your own compliance.

Another very efficient way to get it done is by lodging through Standard Business Reporting (SBR) enabled software. If you're already using an accounting platform like Xero, MYOB, or QuickBooks, you can usually lodge your BAS right from the software. This is a game-changer because it connects your bookkeeping directly to your reporting, slashing the risk of manual data entry errors.

Choosing Your Lodgement Method

How you choose to lodge often comes down to your business setup and how comfortable you are with digital tools. Each method has its own clear advantages.

• Online Services for Business: This is ideal for sole traders and small businesses who manage their own books and prefer to deal directly with the ATO's own platform.
• SBR-Enabled Software: Absolutely perfect for businesses that have their finances sorted in accounting software. It keeps everything neat and tidy within a single system.
• Registered BAS or Tax Agent: This is the best option if you want an expert to cast their eye over everything, check for accuracy, and get you access to those handy extended lodgement deadlines.

Lodging electronically isn't just a nice-to-have anymore; it's the standard way of doing things. It gives you a secure digital receipt of your submission and makes sure the ATO gets your info instantly—which is vital when a deadline is breathing down your neck.

Making Your BAS Payment

Just remember, lodging your BAS and paying it are two separate actions. Submitting the form on time is critical, but making sure the payment actually lands with the ATO by the due date is just as important.

The ATO offers a few different payment options to suit everyone. BPAY is one of the most common, letting you pay straight from your bank account using the unique biller code and reference number on your BAS. You can also pay online through the ATO website with a credit or debit card, but keep in mind a card payment fee might apply.

For a completely set-and-forget process, you can set up a direct debit from your ATO Online services account. This gives the ATO permission to withdraw the amount you owe on the due date, ensuring you never miss a payment. If you want to get a deeper understanding of the entire lodgement and payment cycle, our detailed guide on the Business Activity Statement lodgement process breaks it all down for you.

Answering Your Top BAS Deadline Questions

When it comes to your Business Activity Statement, a few common questions pop up time and time again. Getting these sorted is key to staying on the right side of the ATO and avoiding any last-minute panic as the BAS due dates for 2025 roll around. We've compiled the most frequent queries we get from business owners just like you.

One of the biggest questions is about due dates that land on a weekend or public holiday. Good news here: the Australian Taxation Office (ATO) gives you a bit of breathing room. The deadline automatically shifts to the next business day, so you can lodge and pay then without any risk of a penalty.

Correcting Mistakes and Asking for More Time

So, what happens if you spot a mistake right after you’ve lodged your BAS? Don't stress, it happens more often than you think, and the ATO has a clear process for fixing things. For most minor errors with GST or fuel tax credits, you can simply adjust it on your next BAS, as long as the mistake is within the ATO's defined limits.

For bigger stuff, especially anything related to PAYG withholding, you'll likely need to go back and revise the original BAS you submitted. The golden rule is to act fast and be upfront with the ATO—it goes a long way in maintaining a good compliance record.

Another hot topic is whether you can apply for a lodgement extension yourself. While registered BAS and tax agents get automatic extensions for their clients, you can ask the ATO for a deferral directly if you're facing exceptional circumstances.

To apply, you’ll need a solid reason, like a natural disaster, a serious personal illness, or another major event that's genuinely stopped you from lodging on time. You absolutely must get in touch with the ATO before the due date to talk through your situation.

Just remember, these kinds of deferrals are decided case-by-case and aren't a sure thing. If you want consistent, reliable extensions and professional oversight, partnering with a registered agent is still the sharpest strategy for managing your BAS obligations.

Feeling the pressure of BAS deadlines and compliance? The expert team at Australia Wide Tax Solutions can take BAS preparation and lodgement completely off your plate. We ensure everything is accurate and on time, so you can get back to what you do best—running your business. Contact us today to make your tax obligations simple by visiting https://www.awts.net.au.

How do I get help with this from the ATO?

The ATO provides guidance through ato.gov.au, the Small Business Support Line (13 28 66), and Online Services for individuals and businesses. For complex situations, a registered tax agent provides advice tailored to your specific circumstances and professional indemnity protection. You can verify agent registration at the TPB register at tpb.gov.au.

What records do I need to keep for tax purposes in Australia?

Most tax records must be kept for five years from the date of lodgement or the date the transaction occurred, whichever is later. Records must be in English or convertible to English and must be sufficient to explain the income and deductions in your return. The ATO can request records at any time during the retention period.

When do I need a registered tax agent in Australia?

Consider a registered tax agent when your affairs involve multiple income sources, business activity, investment properties, capital gains, or overseas income. Agents extend your lodgement deadline, provide safe harbour protection, and take professional responsibility for the advice given. Verify registration at tpb.gov.au.

How does the ATO calculate penalties for compliance failures?

The failure to lodge penalty is based on penalty units ($313 per unit from 1 July 2023), accruing per 28-day period for late returns and BAS lodgements. Incorrect information penalties range from 25% to 75% of the tax shortfall depending on whether the behaviour was careless, reckless, or intentional. Proactive disclosure before an audit begins typically results in significantly reduced penalties.

What is the difference between tax avoidance and tax minimisation?

Tax minimisation is the legal arrangement of your affairs to reduce tax — claiming all eligible deductions, using appropriate structures, and timing income and expenses. Tax avoidance involves arrangements that technically comply with the law but achieve outcomes parliament did not intend. The ATO can apply Part IVA anti-avoidance rules to cancel benefits from avoidance arrangements.