Your BAS Is Overdue: What to Do Right Now

Missing a BAS deadline is fixable — but only if you act in the right order. This step-by-step guide covers exactly what to do if your BAS is overdue: lodge first, deal with payment second, and get a system in place so it doesn't happen again.

What to do if your BAS is overdue: the 24-hour action plan

The single most important thing to understand is that a late BAS is actually 2 separate problems: a lodgement problem and a payment problem. Most trade business owners treat them as one problem, do nothing, and make the situation materially worse.

The lodgement problem must be solved first, regardless of whether you have the money to pay. Here's why: the Failure to Lodge (FTL) penalty accrues every 28 days from the original due date. The moment you lodge — even without paying a cent — the FTL clock stops. The penalty freezes at whatever it's reached. Doing nothing, by contrast, keeps the clock running and triggers automatic ATO escalation.

According to data cited by 42advisory.com.au, the ATO issued over 180,000 FTL penalties for late BAS in 2023, collecting approximately $95 million. That's not a figure from a compliance crackdown — that's the automated system running as designed. The ATO doesn't need to make a judgment call; the penalty issues itself.

The 24-hour window matters because GIC (General Interest Charge) starts accruing from the original payment due date and compounds daily. Every day you delay costs money. The order of operations is: lodge today, calculate the full debt, then decide how to pay.

Step 1: Lodge your BAS today (even if you can't pay)

Lodging immediately stops the FTL penalty from accruing further — this is non-negotiable and should happen before you do anything else.

The ATO separates lodgement from payment. You can lodge a complete, accurate BAS without paying the resulting liability. What you cannot do is pay without lodging and expect the FTL penalty to stop — it won't. The penalty is specifically for not lodging, not for not paying.

How to lodge via ATO Online Services for Business:

• Log in with your myGovID credentials
• Navigate to Activity Statements
• Select the overdue period and complete the BAS fields
• Submit — the lodgement timestamp is recorded immediately

This takes around 15 minutes if your figures are ready. If you use Xero or MYOB AccountRight, your accountant or registered BAS agent can pull the figures and lodge within hours — often the same day if you call before noon.

From 1 July 2026, the FTL penalty for small entities (turnover under $1M) is $364 per 28-day period overdue, capped at $1,820 per BAS statement, according to digit.business. If your BAS is 30 days late, that's $364 already accrued. At 60 days, it's $728. Lodge now and you freeze it where it is.

For broader context on how GST liability is calculated in the first place, GST for Trade Businesses: Simple Guide That Works covers the mechanics in plain language.

Step 2: Calculate your actual debt

Once you've lodged, your total liability has 3 components: the original GST amount, any FTL penalty, and the General Interest Charge.

The General Interest Charge (GIC) is where people get caught out. It's calculated daily on a compounding basis. From 1 July 2025, GIC interest is also no longer tax-deductible — a rule change that is significantly underreported. Every dollar of ATO interest is now a pure, unrecoverable cost to your business.

To see your exact current debt, log into ATO Online Services for Business and navigate to Accounts and Payments. The portal shows your GST liability, any FTL penalty applied, and GIC accrued to date — all in real time.

A worked example: a $10,000 BAS overdue for 90 days breaks down as follows — $10,000 original GST liability, plus a $364 FTL penalty (one 28-day period), plus approximately $270 in GIC at the current rate. Total debt: approximately $10,634. None of that $270 in interest is deductible.

The longer you wait after lodging, the more GIC compounds. Roughly every 10 days adds another 0.3% to the outstanding balance. This is why the payment decision in Step 3 is time-sensitive.

Step 3: Pay in full or set up a payment plan

Once you know the full debt, you have 2 options: pay in full or arrange a payment plan. The right answer depends on what finance you can access.

When paying in full makes sense

If you can access short-term business finance at under 8% per annum — a line of credit, a business overdraft, or a short-term loan — paying the ATO in full is cheaper than sitting on a payment plan. The GIC rate for Q1 2026–27 is effectively a debt accruing at a rate that exceeds most commercial lending options, and it's no longer deductible. Run the numbers before assuming the ATO plan is your best move.

When a payment plan makes sense

ATO payment plans are available for debts under $100,000 and can be arranged online in minutes through ATO Online Services for Business. You'll need all lodgements to be current before applying — which is why Step 1 (lodge first) is essential.

Small businesses with turnover under $2M and activity statement debt of $50,000 or less overdue by up to 12 months may be eligible for an interest-free payment plan, according to the ATO's Alternative Payment Plans guidance. This is worth checking before you accept a standard GIC-bearing arrangement.

Use the ATO Payment Plan Estimator (available inside ATO Online Services) to model instalment amounts over different timeframes before you commit.

Step 4: Call your accountant or BAS agent

If you haven't already, contact your accountant or a registered BAS agent now — especially if this is your first late lodgement.

A registered BAS agent can lodge the overdue BAS on your behalf and, critically, submit a formal written application for FTL penalty remission. From January 2026, remission requests require a formal written application — they're no longer granted automatically or verbally. First-time offenders with a clean lodgement history have a genuine case, but someone needs to make it on your behalf.

If you don't have an accountant, a registered BAS agent typically charges $50–$150 to lodge a single BAS and can advise on payment options at the same time. That's a straightforward cost against the alternative of a $364–$1,820 FTL penalty you may be able to get remitted.

What not to do: ignore ATO letters, assume payment without lodgement resolves the issue, or take advice from someone who isn't a registered tax or BAS agent. The ATO's escalation process is automated — it doesn't wait for you to feel ready.

Not sure where to start? Book a free 15-minute call We'll look at your current setup and point you toward the fastest path forward.

The hidden cost: forced monthly reporting

This is the consequence almost no article talks about, and it's the one that causes the most long-term damage.

From 1 April 2025, the ATO has been actively moving businesses with poor lodgement or payment histories from quarterly to monthly GST reporting — for a minimum of 12 months. This isn't a threat; it's now enforcement policy, with building trades explicitly named as an ATO compliance hot-spot for targeted action.

Monthly BAS reporting means 12 lodgements per year instead of 4. If you use a BAS agent at $50–$150 per lodgement, that's potentially 8 additional billable lodgements annually — $400–$1,200 in ongoing compliance costs, every year, until the ATO restores you to quarterly reporting.

Monthly reporting also means monthly payment obligations, which creates tighter cashflow pressure for businesses with uneven revenue — exactly the seasonal pattern that caused the late lodgement in the first place.

One late lodgement may not trigger this. A second one within 12 months almost certainly will. The real cost of repeated lateness isn't just the penalty — it's the permanent compliance overhead increase that follows.

Why your BAS went overdue in the first place

Most trade business owners don't have a cash problem — they have a visibility problem.

The GST liability isn't a surprise because the money isn't there. It's a surprise because the number isn't known until the last week of the quarter. And by then, there's no time to adjust cashflow before the BAS is due.

Here's the structural cause: job management software like ServiceM8 or Tradify isn't synced to accounting software like Xero or MYOB AccountRight in real time. Invoices sit in ServiceM8 as completed jobs. They don't flow to Xero until a bookkeeper reconciles — which typically happens at month-end or quarter-end. Until that reconciliation happens, GST goes uncoded and invisible.

The result: you're running your business all quarter thinking your GST position is roughly X, and then a bookkeeper reconciles and the actual number is 30% higher than you expected. You now have 21 days to find money you didn't know you owed.

This isn't a willpower problem or a planning problem. It's a data lag problem. The fix isn't trying harder — it's closing the sync gap so your GST liability is visible weekly, not as a quarterly shock. Understanding the broader cashflow structure behind this is worth reading: Why Service Businesses Have Cash Flow Problems explains the structural pattern in detail.

The system fix: real-time GST visibility

The practical fix is straightforward: connect your job management software directly to your accounting software so invoices sync automatically.

ServiceM8 integrates natively with Xero. When a job is marked complete in ServiceM8, it syncs to Xero as a coded invoice — no manual entry, no reconciliation lag. GST is captured at the point of invoicing, not weeks later. ServiceM8 starts at approximately $29/month (AUD, job-volume tiers).

Tradify integrates with both Xero and MYOB AccountRight. Invoices created in Tradify flow to your accounting software in real time, giving you an accurate running GST position without double entry. Tradify starts at approximately $35/user/month.

When GST is coded in real time, you can pull a rough BAS estimate at any point during the quarter. You know by week 6 what the quarter-end figure is likely to look like. You can set cash aside progressively rather than scrambling in the final week.

Not sure which platform suits your trade? ServiceM8 vs Tradify vs Fergus: Which Fits Your Trade? walks through the trade-offs in detail. And once the GST visibility problem is solved, the next lever is shortening your payment collection cycle — The 7-Day Payment Loop covers a step-by-step system for getting customer money in faster.

The cost of either platform is far less than a single FTL penalty, let alone the compounding GIC on a debt that built up invisibly.

What happens next: the ATO's escalation path

If you lodge immediately and set up a payment plan, the ATO will not pursue further action. That resolves the matter.

If you ignore the overdue BAS, here's what happens in sequence:

• Automated reminders issue immediately after the deadline
• A compliance letter follows — building trades are explicitly flagged as a targeted sector for these
• After 60 days without lodgement, the ATO may issue a Director Penalty Notice (DPN) to company directors — this creates personal liability for the debt, separate from the company
• If a payment plan is set up but not honoured after 90 days, the ATO can escalate to debt collection, bank account garnishing, or asset seizure

According to data from leviconsulting.com.au and accountantsdaily.com.au (ANAO report), small business collectable tax debt totalled $35.9 billion as at 30 June 2025 — 66.1% of the ATO's total collectable debt across 1.3 million small businesses. The ATO is not in a position to be lenient at scale. The escalation path runs on a schedule.

The good news: every step on that escalation path is avoidable by lodging today and setting up a plan — even a 12-month instalment arrangement.

Penalty remission: do you qualify?

FTL penalty remission is discretionary and available to businesses with a clean lodgement history — but it requires a formal written application from January 2026 onwards.

First-time late lodgers have the strongest case. The ATO applies more leniency to a genuine one-off slip than to a pattern of lateness. If you've always lodged on time and this is your first miss, your accountant or BAS agent should submit a remission request alongside or immediately after the lodgement.

Remission doesn't erase the full debt. It removes the FTL penalty component, leaving the original GST liability plus any GIC that has accrued. But that's still a meaningful saving — up to $1,820 per BAS statement — and even if remission is denied, you're no worse off than if you didn't ask.

The application must be in writing and submitted by a registered agent. A verbal request to the ATO is no longer sufficient.

Your checklist: what to do today

The situation is recoverable. The worst version of this problem is the one where nothing gets done for another 2 weeks. Lodge today, deal with the money second, and fix the visibility problem so there's no next time.

Sources

1. [1]ATO Online Services for Business · Australian Taxation Office, 2025
2. [2]BAS Due Dates 2026–27 and FTL Penalty Rates · digit.business, 2026
3. [3]GIC Rate and Deductibility Change — 1 July 2025 · 42 Advisory, 2025
4. [4]Small Business Tax Debt — ANAO Report · Accountants Daily / ANAO, 2025
5. [5]ATO Alternative Payment Plans (Interest-Free Eligibility) · Australian Taxation Office, 2025