Hopkan Partners is a registered BAS agent helping Australian businesses prepare and lodge their Business Activity Statement accurately and on time. GST, PAYG withholding, PAYG instalments and IAS — all handled under one fixed monthly fee, with no ATO deadlines missed and no compliance surprises.
Based in Sydney. Serving businesses across Australia.

A Business Activity Statement (BAS) is the form Australian businesses use to report and pay GST, PAYG (Pay As You Go) withholding, PAYG instalments and other tax obligations to the ATO. If your business is registered for GST, you’re required to lodge a BAS — quarterly for most, monthly above the GST turnover threshold.
Under Australian tax law, any business with GST turnover of $75,000 or more must register for GST and lodge BAS regularly. Getting it right matters: incorrect lodgement can trigger penalties starting at $330 per 28-day period, and repeated errors attract ATO audits.
Late or incorrect lodgement triggers Failure to Lodge penalties and interest charges. A registered BAS agent protects you from avoidable fines.
GST coding errors, missed PAYG instalments and wrong labels are the most common BAS mistakes. Getting them right the first time costs less than fixing them later.
Businesses lodging through a registered BAS agent receive extended ATO deadlines — up to four extra weeks per quarter. That's time back in your business.
Under the Tax Agent Services Act 2009, only a registered BAS agent can legally prepare and lodge your BAS for a fee. That registration — verifiable on the Tax Practitioners Board public register — means stricter accuracy standards, extended lodgement deadlines, and professional indemnity you don’t get from unregistered providers.

Verified on the TPB public register and legally authorised to prepare and lodge your BAS on your behalf.

Every BAS is reconciled against your Xero or MYOB data before lodgement. Discrepancies are resolved, not buried.

Your BAS isn't a one-off job. It's part of your monthly bookkeeping retainer — so the data it's built on is already current and clean.

BAS lodgement is included in your retainer. No per-lodgement fees, no surprise invoices at quarter-end.
BAS preparation sits on top of your accounting data. Every GST coding decision, every PAYG calculation, every reconciliation variance comes from the ledger underneath — so the software you’re using matters.
Hopkan Partners is a Xero Certified Advisor and works across MYOB and QuickBooks. Your existing setup doesn’t need to change — we integrate with whichever platform your books already live in.

Every BAS lodgement handled by Hopkan Partners covers the full preparation, reconciliation and submission process — not just hitting the submit button on ATO Online. Here’s what’s included:
Every GST-coded transaction reviewed and reconciled against bank data before submission.
Employee withholding and business instalments calculated, reported and paid correctly.
Instalment Activity Statements for months outside your BAS cycle, prepared and lodged alongside.
Inactive quarters still require lodgement. We handle these without additional fees.
If errors are found in previous periods, we prepare and lodge corrections before the ATO finds them.
Queries, reviews and lodgement extensions managed on your behalf. You don’t call the ATO; we do.
Book a 30-minute BAS review. We’ll check your last two BAS lodgements, flag any GST coding issues, and tell you what a clean handover looks like — free of charge.
Every BAS cycle follows the same five-step process — so you always know what’s happening, when it’s happening, and what you’ll see before anything goes to the ATO.
01
Your Xero or MYOB file is reconciled against bank data, payroll records and supplier invoices. We're not just collecting documents, we're confirming the numbers are right before they're reported.
02
Every GST-coded transaction is reviewed against ATO classifications. GST-free, input-taxed and mixed-use items get flagged. PAYG withholding and instalments are recalculated.
03
The BAS is prepared and sent to you for review at least five business days before the ATO deadline. You see every label, every figure, every variance from last period before anything gets lodged.
04
Once approved, your BAS is lodged through the ATO BAS agent portal. We confirm the receipt, the payment amount, and the due date in writing.
05
ATO queries, review requests and lodgement extensions are handled on your behalf. You get notified, we handle the admin.
BAS due dates depend on your reporting cycle. Most businesses lodge quarterly; businesses with GST turnover above $20 million must lodge monthly. Lodging through a registered BAS agent generally extends these deadlines by up to four weeks.
Q1
July – September
28 October
25 November
Q2
October – December
28 February
28 February
Q3
January – March
28 April
26 May
Q4
April – June
28 July
25 August
Monthly BAS — Lodgement is due on the 21st of the following month, regardless of BAS agent use.
The BAS agent extension exists if you need it — but earlier is better. Knowing your GST liability four weeks ahead of the deadline gives you time to plan cash flow, check for errors, and pay without pressure. We prepare every client’s BAS well before the standard deadline, and recommend lodging as soon as the period closes if you can afford to. The extension is a safety net, not a default.
Late lodgement triggers a Failure to Lodge penalty of $330 per 28-day period, up to a maximum of $1,650 for small businesses. Interest also accrues on unpaid amounts at the ATO’s general interest charge rate.
Source link: ATO Failure to Lodge penalty
BAS lodgement is the process of submitting a Business Activity Statement to the ATO, reporting GST, PAYG withholding, PAYG instalments and other tax obligations for a given period. Any business registered for GST is required to lodge, regardless of turnover size. Lodgement happens quarterly for most businesses and monthly for those with GST turnover above $20 million.
Every Australian business registered for GST must lodge a BAS — this includes sole traders, partnerships, companies and trusts. GST registration is mandatory once your annual GST turnover reaches $75,000 ($150,000 for non-profits). If you’re under the threshold and haven’t registered for GST, you don’t need to lodge a BAS.
Quarterly BAS is due 28 days after the end of each quarter: 28 October, 28 February, 28 April and 28 July. Businesses lodging through a registered BAS agent generally receive an extension of up to four weeks for Q1, Q3 and Q4. Monthly BAS is due on the 21st of the following month, with no agent extension available.
A registered BAS agent is a professional authorised by the Tax Practitioners Board (TPB) to prepare and lodge BAS on behalf of Australian businesses. Under the Tax Agent Services Act 2009, charging a fee for BAS-related services without TPB registration is illegal. Registered BAS agents must meet minimum qualification, experience and professional indemnity insurance standards.
You can lodge your own BAS if your business has straightforward transactions, consistent GST coding and you’re confident in your accounting software. Most businesses with employees, mixed-use assets, interstate sales or prior BAS errors benefit from using a registered BAS agent — both for accuracy and for the extended lodgement deadlines. The cost of getting it wrong typically exceeds the cost of professional help.
Hopkan Partners includes BAS lodgement as part of a fixed monthly retainer, not as a per-lodgement fee. Standalone BAS lodgement services in Australia typically range from $200 to $500 per BAS, depending on transaction volume and complexity. Bundling BAS with bookkeeping is usually more cost-effective because the underlying data is already reconciled.
Late lodgement triggers a Failure to Lodge penalty of $330 per 28-day period, up to $1,650 for small businesses. Interest also accrues on any unpaid tax at the ATO’s general interest charge rate. If you’ve already missed a deadline, lodging as soon as possible reduces the penalty — and voluntary lodgement before the ATO contacts you is usually treated more favourably than forced compliance.
A BAS (Business Activity Statement) reports GST, PAYG withholding, PAYG instalments and other taxes for businesses registered for GST. An IAS (Instalment Activity Statement) reports only PAYG withholding or PAYG instalments and is used by businesses not registered for GST, or for months in between quarterly BAS periods. Monthly PAYG reporters typically lodge IAS in the two months between quarterly BAS lodgements.
Yes — if your business is registered for GST, you must lodge a BAS even for periods with zero sales and zero expenses. This is called a nil BAS. Failing to lodge, even for an inactive period, still attracts a Failure to Lodge penalty. Lodging a nil BAS takes only minutes through ATO Online or via your BAS agent.
Yes. Hopkan Partners is based in Sydney and provides BAS lodgement services across Sydney, Parramatta, Chatswood, Castle Hill, Norwest and Blacktown — and remotely to businesses Australia-wide. All services are delivered via Xero, MYOB or QuickBooks with no in-person meetings required.
Stop worrying about GST coding, quarterly deadlines and ATO correspondence. Your BAS becomes part of your monthly bookkeeping — prepared by a team that also reads the numbers, flags margin pressure early, and talks you through what the quarter actually means.
Book a free 30-minute consultation to review your current BAS setup and see what a clean handover looks like.