What To Do Before Your First BAS In Ipswich

Registering for GST is one of the first real milestones for an Ipswich business owner, and your first Business Activity Statement is the moment the ATO expects you to get it right from the start. Whether you've just crossed the $75,000 GST registration threshold, registered voluntarily because it suits your cash flow, or you're running a new business that hit the ground running, the first BAS sets the tone for every lodgement after it.

Most new registrants underestimate how much preparation goes into a clean first BAS. The reporting period, the accounting basis you choose, and the way your bookkeeping software is configured all shape what you report and what you can claim. Get those settings right before you lodge and you'll save yourself hours of corrections later. With Payday Super now requiring super to reach the fund within 7 business days of each payday, employers are also navigating more moving parts in the same quarter.

Skyways Accountants helps Ipswich business owners set up their BAS process correctly from day one, starting with a free consultation. We work through your reporting period, accounting basis, and bookkeeping setup so your first lodgement reflects your actual position, not a guess.

Below, we cover the key decisions and checks every new GST registrant in Ipswich should work through before they lodge for the first time.

Why your first BAS matters more than the ones that follow

Your first BAS establishes the foundation for every lodgement after it. The accounting basis you select, the way you configure your software, and the expense categories you set up carry forward automatically. A misconfigured opening will produce errors in every subsequent quarter until you go back and fix it, which often costs more in accountant time than getting it right before the first lodgement ever would.

There's also a compliance dimension. The ATO monitors new GST registrants closely in their first year, particularly businesses that claim significant GST credits in the first period. If your first BAS triggers a refund, expect a letter or a call asking you to substantiate the claim. That's not a problem if your records are in order, but it becomes one quickly if they aren't. Correct bookkeeping and payroll setup before you lodge is the simplest insurance policy against this.

What does a first BAS actually require in Ipswich?

A Business Activity Statement reports the GST you've collected from customers and the GST credits you're claiming on business purchases. The difference is what you pay to (or receive from) the ATO. For most small businesses lodging quarterly, the BAS also reports PAYG withholding if you have employees, and PAYG instalments if the ATO has issued them. Your first BAS reflects the quarter in which your GST registration took effect, which is not always the quarter in which you applied. If you registered and then back-dated your effective registration date, the first period may be longer than a standard quarter.

GST rules and settings every new registrant should confirm

• Registration threshold: GST registration is mandatory once your annual turnover reaches $75,000. Non-profit organisations have a higher threshold of $150,000. Voluntary registration is available below the threshold and can make sense if you want to claim input tax credits on business purchases.
• Accounting basis - cash vs accruals: Cash accounting means you report GST when money changes hands. Accruals accounting means you report when an invoice is raised. Cash accounting is available to businesses with turnover under $10 million and is usually simpler for service businesses with variable payment timing. The choice has a real cash flow impact, so confirm it before your first lodgement.
• Reporting frequency: Monthly reporting is required if your GST turnover is $20 million or more. Below that, quarterly is the default. Annual reporting is available only to businesses voluntarily registered with turnover under $75,000 ($150,000 for non-profits). From 1 April 2025, the ATO began placing some small businesses with poor compliance history onto monthly reporting for a minimum of 12 months, so check your registration confirmation for your assigned cycle.
• Tax invoices: You can only claim GST credits on purchases where you hold a valid tax invoice. For purchases over $82.50 (GST-inclusive), the invoice must include the supplier's ABN, a description of the goods or services, the date, the price, and a statement that GST is included. Invoices under $82.50 need less detail, but the ABN is still required.
• Mixed-supply businesses: Not every sale attracts GST. Fresh food, basic health services, and most financial supplies are GST-free or input-taxed. If your business has both taxable and non-taxable sales, you need an apportionment method for your GST credits before your first BAS. Getting this wrong is one of the most common first-BAS errors.
• Fuel tax credits: If your business uses fuel in machinery, equipment, or heavy vehicles, fuel tax credits are claimable on your BAS and are routinely missed. For fuel acquired from 3 August 2026, the rate for all business uses other than heavy vehicles on public roads is 53.7 cents per litre. Heavy vehicles on public roads receive 21.3 cents per litre.

How do Ipswich Business Accountants help new registrants get their first BAS right?

An Ipswich Business Accountants team like ours typically works through four things with a new GST registrant before their first lodgement. First, we confirm the registration details are correct, including the effective date, the reporting frequency, and whether the accounting basis suits how the business actually invoices and collects. Second, we review the bookkeeping software setup to check that GST codes are mapped correctly to the right tax labels on the BAS. Third, we identify any mixed-supply issues or unusually large credit claims that might attract ATO attention and make sure the supporting documentation is in place. Fourth, we flag any PAYG withholding or instalment obligations that run alongside the GST reporting.

The practical value of working through this before the first lodgement is that errors compound. A wrong accounting basis in quarter one means every subsequent quarter is built on an incorrect foundation. Catching it before the first lodgement avoids an amendment process, a potential ATO review, and the administrative burden of explaining why the first period looks different from all the ones that followed. Our tax compliance and accounting service covers BAS setup and review for new registrants as part of an ongoing engagement.

BAS mistakes new Ipswich registrants make most often

Trying to do your BAS without reviewing the setup first is a bit like submitting a quote without reading the scope of works, you can get it mostly right, but the parts you miss become disputes later. The most common first-BAS error is claiming GST credits on purchases that are either not business-related, not supported by a valid tax invoice, or relate to input-taxed supplies where no credit is available. The second most common is reporting GST on the wrong basis, particularly businesses that set up accruals in their software but operate on cash flow that doesn't match their invoicing pattern.

A less obvious mistake is missing the back-dated registration period. If the ATO back-dates your GST registration to the point your turnover crossed $75,000 (which they can do if you registered late), you may owe GST on sales you made before you lodged any BAS. That amount needs to be included in your first lodgement, and it can be significant if registration was delayed by several months. The ATO's general interest charge for the October to December 2026 quarter is 11.51% per year, and from the 2025-26 income year, that charge is no longer tax deductible, which makes late registration more expensive than it once was.

Quarterly due dates and what happens if you miss them

For the 2026-27 financial year, quarterly BAS due dates for self-lodgers are 28 October 2026, 28 February 2027, 28 April 2027, and 28 July 2027. Online self-lodgers receive an automatic two-week extension for most quarters, but not the October to December quarter. If you lodge through a registered tax agent under the tax agent lodgement program, the dates shift: 25 November 2026, 28 February 2027 (no extension), 26 May 2027, and 25 August 2027. Missing a due date triggers a failure-to-lodge penalty of one penalty unit ($364 from 1 July 2026) per 28 days or part thereof, up to a maximum of five units ($1,820) for small entities. The penalty compounds, so a missed first BAS that goes unaddressed for a full quarter can attract the maximum before you realise it.

If you think you'll miss a due date, contact the ATO before the deadline. They have discretion to remit penalties for businesses with a clean compliance history, but that discretion disappears if the lodgement is already overdue and you haven't made contact. For help staying on top of your lodgement schedule from the start, our bookkeeping and payroll team can manage your BAS calendar and send you timely reminders.

PAYG withholding and instalments on your BAS

If you have employees, PAYG withholding runs alongside your GST reporting on the same BAS form. You report the total gross wages paid and the total tax withheld during the period. This figure must match what you've reported through Single Touch Payroll, which operates in real time. A mismatch between your BAS and your STP data is one of the ATO's most reliable triggers for a correspondence review, so your payroll records and your BAS figures need to reconcile before you lodge.

PAYG instalments are different again. They are quarterly prepayments of the income tax you'll owe at the end of the year, based on your last assessed tax return. The ATO issues them when your last assessed tax bill from business or investment income exceeded $1,000. They appear as a separate label on the BAS. Many first-year businesses don't have PAYG instalments in their first BAS because they haven't yet lodged a return with assessable business income, but if you've operated as a sole trader before incorporating or were previously assessed, they may already apply. Check your BAS form carefully before lodging to confirm which labels require figures and which don't.

Frequently Asked Questions

Your Next Steps

Your first BAS is the moment your GST compliance becomes real, and the choices you make before you lodge shape everything that follows. Getting the accounting basis right, confirming your reporting period, reconciling your payroll figures, and making sure your tax invoices are in order before you hit submit is far less work than unwinding an incorrect lodgement after the fact. For Ipswich businesses navigating this for the first time, the complexity is manageable with the right preparation.

Ready to find out whether your BAS setup is correct before you lodge for the first time? Contact the Skyways Accountants team for a free consultation or call 0400 348 482. We'll review your GST registration details, your bookkeeping configuration, and your record-keeping position so your first lodgement goes in correctly.