Penalty for Late BAS Lodgement: What Australian Businesses Need to Know in 2026

Could a late BAS lead to a penalty even if you can’t pay the tax bill yet? It helps to separate the two: a penalty for late BAS lodgement relates to submitting the statement late, while interest may apply to an unpaid tax amount. They’re different consequences, and one doesn’t automatically mean the other applies.

If you’ve missed a deadline, it’s understandable to feel unsure about what comes next. In 2026, one penalty unit is A$364, and the late-lodgement penalty can build for each 28-day period or part of one, with the potential amount affected by your business’s size. This guide explains what may apply, what to do if you’re behind, and why lodging promptly matters, even if you can’t pay straight away.

For businesses in Mornington and Rye, The Sphere Group is based on the Mornington Peninsula and provides accounting, bookkeeping and business advisory support. As chartered business accountants and tax advisors, the team provides year-round guidance, not just support at tax time. A clear picture of your position is a better starting point than guesswork.

Penalty for late BAS lodgement: what can happen if you miss the deadline?

If you run a business in Mornington or Rye and have missed a BAS deadline, take a breath. It’s a reason to check what’s outstanding and act, not to panic or guess. A penalty for late BAS lodgement may apply when a required statement isn’t lodged by its due date, but a late BAS doesn’t automatically mean every business faces the same outcome.

A BAS, or Business Activity Statement, is used to report relevant business tax information to the ATO. Lodging it is separate from paying any amount it shows as owing. A business may need to lodge a BAS even if there’s no amount to pay. Equally, having a tax amount to pay doesn’t tell you whether the statement was lodged on time.

What does a late BAS lodgement penalty mean?

A late-lodgement penalty is a possible ATO consequence for failing to lodge a required document by the relevant deadline. Whether it applies, and how it’s assessed, depends on the current rules and the taxpayer’s circumstances. Don’t assume that a late statement always leads to a penalty, or that a nil or refund result means you can ignore the lodgement. Check your ATO account and any notice you’ve received to understand your specific position.

Keep the two issues separate: lodgement is about submitting the required BAS information; payment is about paying an amount reported as owing. If you’re unsure what an ATO notice means, get advice based on your records and the notice itself.

Who may be affected by a missed BAS deadline?

The issue can affect business owners and the staff who prepare, review or oversee BAS lodgements. Your reporting obligations and how often you lodge depend on your business’s circumstances, so don’t rely on another business’s schedule as yours. Confirm the period and due date shown for your own account, and check whether an agent arrangement applies rather than assuming it does.

For businesses across the Mornington Peninsula, including Mornington, Rye, Rosebud, Carrum Downs, Frankston and Portsea, The Sphere Group provides business accounting and bookkeeping support, with guidance throughout the year. A timely check of your records and ATO account can help replace uncertainty with a clear next step.

How the ATO may assess a late BAS lodgement penalty

The amount isn’t necessarily the same for every business. Under the current 2026 rules, a failure-to-lodge penalty is calculated in penalty units. It can increase for each 28-day period, or part of one, that a required statement remains overdue. The amount may also be multiplied according to the entity’s size and classification, so check the ATO’s current rules rather than relying on a figure that may not fit your circumstances.

As at 1 July 2026, one penalty unit is A$364. The base penalty for small entities is capped at five penalty units per outstanding statement; higher multipliers apply to medium and large entities, while significant global entities have a separate, much higher multiplier. The ATO’s classification rules matter, so don’t assume a business category based on turnover alone. Confirm how your entity is assessed before estimating what may be payable.

In short, a late-lodgement assessment may depend on how long the BAS is overdue, the entity’s classification and size, and the circumstances of the case.

Which details should you check on an ATO notice?

Read the notice carefully and compare it with your own records. Check:

• the notice date and the BAS period it refers to
• the penalty amount and how the ATO says it was assessed
• any response instructions or relevant dates
• your lodgement records, including submission confirmations and agent correspondence

If the period, lodgement date or amount doesn’t match your records, don’t ignore the difference. Contact the ATO or ask a qualified adviser to help clarify the notice. Keep copies of the notice and records of any conversations or action taken.

Can circumstances affect the penalty outcome?

You may be able to ask the ATO to remit, or reduce or cancel, a penalty. The ATO considers requests under its current rules, and a reasonable explanation, such as serious illness or a natural disaster, may be relevant. Supporting records can help explain what happened, but no particular reason guarantees remission. The ATO’s guidance says outstanding lodgements need to be up to date before a remission request is made, so check the current requirements and process before applying.

Keep late lodgement separate from an unpaid BAS amount. A failure-to-lodge penalty concerns the statement; the General Interest Charge may apply to unpaid tax. The ATO explains these separately in its guidance on interest and penalties. If you need help reviewing your BAS records or an ATO notice, you can contact The Sphere Group about your circumstances. The firm provides accounting, bookkeeping and tax advisory support to businesses on the Mornington Peninsula.

Late BAS lodgement versus late payment: understand the difference

These are related, but they’re not the same problem. Lodgement means submitting the BAS information the ATO requires. Payment means paying any balance the statement shows is owing. A business can lodge on time but still have an unpaid amount, or lodge late even if the BAS shows nothing to pay. Each situation needs its own next step.

What’s overdue?	What it means	What to check
BAS lodgement	The required statement hasn’t been submitted by its due date. A late-lodgement penalty may apply under the current rules.	Which BAS periods are outstanding, their due dates and your ATO account or notices.
BAS payment	The BAS has been lodged, but an amount owing remains unpaid. General Interest Charge (GIC) may apply to an overdue tax liability.	The balance, payment due date and current ATO information about interest or payment options.

GIC is separate from a penalty for late BAS lodgement. The ATO says it applies to unpaid tax liabilities and compounds daily, but rates and relevant details can change. Check the ATO’s current guidance and your account for the consequences that apply to your circumstances. Lodging a BAS doesn’t clear an unpaid balance, and being unable to pay doesn’t mean you should leave the lodgement issue unchecked.

What if you lodged the BAS but cannot pay in full?

First, confirm the balance and payment due date in your ATO account. Then check directly with the ATO what options may be available and whether interest or other charges apply. Don’t assume a payment arrangement is in place until you’ve confirmed it. If the amount due puts pressure on cash flow, getting advice early can help you understand the choices and plan the business’s next steps.

What if you have not lodged or paid?

Work out which BAS periods are still outstanding, then gather the records needed to prepare each statement. Check the relevant due dates and any messages from the ATO. Don’t wait for a decision about a payment arrangement before checking what needs to be lodged. Lodgement and payment are separate actions, so deal with each directly and confirm current requirements with the ATO.

For a broader overview of staying on top of ATO responsibilities, read this ATO compliance guide for Mornington Peninsula business owners. The Sphere Group is based on the Mornington Peninsula and supports businesses in Mornington, Rye, Rosebud, Carrum Downs, Frankston and Portsea with accounting, bookkeeping and year-round guidance.

Missed your BAS deadline? Take these practical steps now

A clear sequence can help you move from worry to action. If you’re in Mornington or Rye, start with your own ATO account and records rather than relying on assumptions about deadlines or extensions.

1. List the overdue periods. Check which BAS statements are outstanding and confirm the due dates that apply to your business. If a registered tax or BAS agent is involved, ask them to confirm any lodgement arrangement. Don’t assume an extension applies without checking.
2. Gather the records. Pull together sales and expense information, GST details and payroll records where they’re relevant to the BAS. Find prior lodgement confirmations and any ATO letters or messages so you can compare what was submitted with what’s still due.
3. Review ATO messages. Check your account for notices, balances and instructions. If anything is unclear, contact the ATO or a registered tax agent to confirm what action is needed and whether the issue relates to lodgement, payment or both.
4. Act on lodgement. Prepare and lodge the outstanding BAS as soon as you can, using complete and accurate information. If you’re unsure about figures, get help to check them rather than guessing. Don’t wait for a payment arrangement decision before finding out what lodgements are outstanding.

What records should you gather before acting?

For each BAS period, bring together sales and expense records, GST information and relevant payroll details. Also check your previous lodgement confirmations and ATO correspondence. These records help you spot missing periods, confirm what has already been submitted and respond more clearly if the ATO has contacted you. Keep the information organised by period so you can see what still needs attention.

When should you ask an accountant for help?

Get support if several BAS periods are overdue, you can’t confirm the figures, or you believe an ATO notice is incorrect. A qualified adviser can help you review the records, understand the notice and identify practical next steps. The penalty for late BAS lodgement and any amount owing are separate issues, so be clear about which one you need help resolving.

The Sphere Group is based on the Mornington Peninsula and supports businesses in Mornington, Rye, Rosebud, Carrum Downs, Frankston and Portsea with business accounting, bookkeeping and year-round guidance. For a wider view of how to choose an accountant who stays involved throughout the year, read this guide to choosing a proactive accounting partner.

For advice on reviewing overdue BAS records and identifying next steps, contact The Sphere Group.

Prevent future BAS delays with year-round accounting support

A reliable BAS routine makes deadlines easier to manage, even when business gets busy. The goal isn’t to promise that a penalty for late BAS lodgement can never happen. It’s to make responsibilities, records and upcoming tasks visible before a due date slips by.

Build a repeatable BAS preparation routine

Start with a shared calendar that shows your business’s reporting periods and verified lodgement deadlines. Confirm the dates and reporting frequency that apply to your circumstances, rather than copying another business’s schedule or assuming an extension is available.

Assign one person to coordinate the process, even if others help prepare or review the information. Set reminders ahead of each deadline, with enough time to collect records, check figures and resolve questions. Regular bookkeeping throughout the reporting period can make sales, expenses, GST and relevant payroll information easier to review and reconcile. It also helps the person responsible spot missing information before lodgement is due.

Choose support that keeps you informed

Regular check-ins and timely updates can help business owners keep an eye on upcoming reporting dates, incomplete records and changes that may affect their obligations. They also give you a chance to raise questions while there’s still time to plan, rather than discovering an issue when a deadline has passed.

Some businesses prefer a once-a-year accounting relationship. The Sphere Group takes a more involved, year-round approach, with communication and practical guidance to help clients stay across their business accounting and bookkeeping. Ongoing support can improve visibility, but it can’t guarantee a particular tax outcome or prevent every delay.

The Sphere Group is based on the Mornington Peninsula and supports businesses in Mornington, Rye, Rosebud, Carrum Downs, Frankston and Portsea. If you’re looking for ongoing bookkeeping or accounting support, talk through what would suit your business and how you’d like to stay informed.

Contact the Mornington Peninsula accounting team

Stay ahead of your next BAS deadline

A missed BAS deadline calls for prompt, practical action. Check which periods are outstanding, review your ATO messages and confirm what’s required for your business. Remember, lodging a BAS and paying any amount owing are separate responsibilities, so check each one.

The penalty for late BAS lodgement depends on current ATO rules and your circumstances. If you’re unsure how a notice applies, clarify your position rather than relying on assumptions. A simple calendar, clear responsibility and regular bookkeeping can also make BAS preparation easier to manage.

For businesses in Mornington, Rye, Rosebud, Carrum Downs, Frankston and Portsea, The Sphere Group is based on the Mornington Peninsula and provides accounting, bookkeeping and year-round business guidance. The firm supports clients beyond tax time so they can stay informed as their business needs change.

With the right information and support, you can approach your BAS responsibilities with greater clarity and confidence.

Frequently Asked Questions

How much is the penalty for late BAS lodgement?

From 1 July 2026, one penalty unit is A$364, and the penalty can accrue for each 28-day period or part of one that a BAS is overdue. For a small entity, the maximum is five units, or A$1,820 per statement. Medium and large entities can face maximums of A$3,640 and A$9,100 respectively. Significant global entities have a higher multiplier. The amount depends on the entity’s classification and current ATO rules.

What happens if I lodge my BAS late but pay straight away?

Paying the amount owing promptly addresses the debt, but it doesn’t automatically remove a possible late-lodgement penalty. The ATO treats late submission and unpaid tax as separate matters. General Interest Charge may apply to an overdue tax liability, so check your ATO account for the balance, any interest and any penalty notice. If the statement or payment isn’t showing correctly, contact the ATO or ask a registered tax agent to clarify.

Can the ATO waive a late BAS lodgement penalty?

You can ask the ATO to remit, or reduce or cancel, a penalty, but approval isn’t guaranteed. The ATO may consider your explanation and circumstances, with supporting records helping to describe what caused the delay. Its current guidance says outstanding lodgements need to be up to date before you request remission. Check the ATO’s current application process and requirements, and make sure you understand any separate interest charges that may apply.

Should I lodge an overdue BAS if I cannot pay the amount?

Yes, act on the lodgement even if you can’t pay the full balance immediately. Lodging and paying are separate responsibilities, and leaving the BAS unsubmitted may create a separate late-lodgement issue. Confirm the amount owing and due date in your ATO account, then check directly with the ATO about available payment arrangements. Don’t assume an arrangement is approved until confirmed, and consider getting advice early if the debt affects business cash flow.

Does a late BAS lodgement penalty apply to every business?

No. A penalty isn’t automatic in every case, and the outcome depends on current ATO rules and the entity’s circumstances. The penalty calculation can vary with the entity’s classification and how long the statement is overdue. The ATO generally doesn’t apply a failure-to-lodge penalty where a late BAS results in a nil liability or refund, but check your own ATO account and any notice rather than assuming an exception applies.

How can a Mornington or Rye business avoid late BAS lodgement?

Keep a calendar of your verified BAS deadlines, assign someone to coordinate each lodgement and update bookkeeping regularly so figures are ready to review. Confirm your reporting frequency and any agent arrangements for your own circumstances. The Sphere Group is based on the Mornington Peninsula and supports businesses in Mornington, Rye, Rosebud, Carrum Downs, Frankston and Portsea with year-round accounting, bookkeeping and business guidance.