--- title: BAS & IAS Accountant Melbourne | Tax Agent – 42 Advisory description: BAS and IAS lodgement for Melbourne businesses by a registered tax agent. GST, PAYG withholding and instalments prepared, reviewed and lodged on time. image: https://42advisory.com.au/hubfs/Images/WebP/business-advisory-meeting-collaboration-melbourne-42-advisory.webp --- [Skip to Content](https://42advisory.com.au/services/bas-ias-accountant-services-melbourne#body) [![42\_Advisory\_Logo\_Header](https://42advisory.com.au/hubfs/42_Logo_Header.svg "42_Advisory_Logo_Header")](https://42advisory.com.au/) Toggle Menu - Accounting & Tax Toggle children for Accounting & Tax - [Small Business Accountants](https://42advisory.com.au/services/small-business-accountant-melbourne) - [Personal Tax Returns & Advice](https://42advisory.com.au/services/personal-tax-accountant-melbourne) - [BAS & IAS Lodgement](https://42advisory.com.au/services/bas-ias-accountant-services-melbourne) - [Tax Compliance](https://42advisory.com.au/services/small-business-tax-compliance-melbourne) - [SMSF Accountants](https://42advisory.com.au/services/smsf-accountant-melbourne) - [Property Tax](https://42advisory.com.au/services/property-tax-accounting-melbourne) - [Bookkeeping](https://42advisory.com.au/services/small-business-bookkeeping-melbourne) - [CPA Accountants & Business Advisors](https://42advisory.com.au/services/cpa-accountant-melbourne) - [Local Accountants](https://42advisory.com.au/accountants) - Business Advisory Toggle children for Business Advisory - [Business Advisory & 3-Way Forecasting](https://42advisory.com.au/services/business-advisory-forecasting) - [Tax Planning](https://42advisory.com.au/services/tax-planning-melbourne) - [R&D Tax Incentive Services](https://42advisory.com.au/services/r-and-d-tax-incentive) - [Business Valuation](https://42advisory.com.au/services/business-valuations) - [Buying a Business](https://42advisory.com.au/services/buying-a-business-due-diligence-melbourne) - [Finance Broking Overview](https://42advisory.com.au/finance/) - [Residential Finance](https://42advisory.com.au/finance/residential-finance-services-melbourne) - [Commercial Finance](https://42advisory.com.au/finance/commercial-finance-services) - [Asset Finance](https://42advisory.com.au/finance/asset-finance-solutions) - Industries Toggle children for Industries - [Accounting for Doctors](https://42advisory.com.au/industries/accounting-advisory-for-doctors-dentists-health-practices) - [E-Commerce & Online Retail](https://42advisory.com.au/industries/ecommerce-accountants-melbourne) - [Tech, SaaS & IT](https://42advisory.com.au/industries/tech-saas-accounting) - [MMA, BJJ & Muay Thai Gyms](https://42advisory.com.au/industries/martial-arts-combat-sports-gym-accountants-melbourne-42-advisory) - [Cafés, Restaurants & Retail Stores](https://42advisory.com.au/industries/cafés-restaurants-retail-stores) - [Crypto Tax for Investors & Traders](https://42advisory.com.au/industries/crypto-tax-accounting-for-investors-traders) - [Builders, Contractors & Trades](https://42advisory.com.au/industries/builders-tradies-accountants-melbourne) - [Startup Accounting & Advisory](https://42advisory.com.au/industries/startup-accounting-advisory-services-melbourne) - [Professional Services Firms](https://42advisory.com.au/industries/professional-services) - [Automotive & Mechanical Services](https://42advisory.com.au/industries/automotive-accountants-melbourne) - [About Us](https://42advisory.com.au/about) - [Contact Us](https://42advisory.com.au/contact-us) - [Resources](https://42advisory.com.au/42-advisory-blog) - [(03) 9997 7081](tel:0399977081) ![Team of professionals in a meeting sharing ideas — representing collaboration, planning, and proactive BAS and IAS tax compliance services by 42 Advisory in Melbourne](https://42advisory.com.au/hs-fs/hubfs/Images/business-people-exchanging-ideas-and-documents-dur-2025-08-21-15-56-59-utc.jpg?width=720&height=480&name=business-people-exchanging-ideas-and-documents-dur-2025-08-21-15-56-59-utc.jpg) BAS & IAS Compliance for Melbourne Businesses # BAS & IAS Accountant Melbourne – Accurate Lodgement, Timely Advice Whether it’s your Business Activity Statement (BAS) or Instalment Activity Statement (IAS), our Melbourne team guides you through GST, PAYG and instalment obligations. We keep you compliant and confident. [Book a Consultation](https://42advisory.com.au/contact-us) Accredited. Connected. Trusted. ## BAS Lodgement by a CPA Practice and Registered Tax Agent Trusted by Melbourne’s medical professionals, ecommerce brands, and local service businesses. We simplify your tax, accounting, and growth strategy. - ![Logo\_of\_CPA\_Australia](https://42advisory.com.au/hubfs/Logos/Logo_of_CPA_Australia.svg) - ![TPB](https://42advisory.com.au/hubfs/Logos/TPB.svg) - ![Xero\_Logo - Blue](https://42advisory.com.au/hubfs/Logos/Logo%20-%20Blue.svg) - ![ATO\_logo](https://42advisory.com.au/hubfs/Logos/logo.svg) - ![myob-logo](https://42advisory.com.au/hubfs/Logos/myob-logo.svg) For Small Businesses & Growing Companies ## Avoid Last-Minute Stress — Stay Ahead of BAS & IAS Deadlines Managing your BAS and IAS isn’t just about lodging forms — it’s about staying in control of your cash flow and avoiding unnecessary penalties. At 42 Advisory, we work closely with you to: - Prepare and review your BAS accurately - Communicate every deadline in advance - Give you time to make payments comfortably We ensure your reports reflect your true position, manage any ATO communication, and help you plan ahead so there are no surprises. [Learn more about ATO due dates.](https://42advisory.com.au/42-advisory-blog/key-ato-due-dates-bas-payg-fbt-super-tpar)   ![Illustration of an accountant working on a laptop with charts and communication icons — representing accurate BAS and IAS lodgements, ATO compliance, and proactive business tax management by 42 Advisory.](https://42advisory.com.au/hubfs/Graphic%20images/Asset%2042.svg) Complete BAS & IAS Accounting Support ## BAS and IAS Lodgement Services We manage the whole BAS and IAS cycle: preparation, review, lodgement and follow-up with the ATO. As a registered tax agent (TPB 26303651), we lodge through the ATO's online services for agents. ### Quarterly BAS Most small businesses report GST quarterly. The standard due dates are 28 October (July to September), 28 February (October to December), 28 April (January to March) and 28 July (April to June). Lodging through a registered tax agent can give you extra time for most quarters. We check GST coding, PAYG withholding and PAYG instalments before every lodgement. ### Monthly BAS Businesses with GST turnover of $20 million or more must report GST monthly, and smaller businesses can choose to. Monthly statements are generally due on the 21st of the following month. Monthly reporting suits businesses that receive regular GST refunds, such as exporters. ### Instalment activity statements (IAS) An IAS reports PAYG withholding or PAYG instalments when there is no GST to report for the period, for example if you are not registered for GST or you withhold tax monthly. We prepare and lodge IAS alongside your BAS so no statement is missed. ### GST registration You must register for GST within 21 days of your GST turnover reaching $75,000, or $150,000 for a non-profit body. Taxi and ride-sourcing drivers must register regardless of turnover. We confirm whether you need to register, or whether voluntary registration makes sense, before you start charging GST. ### Late lodgement and payment plans The ATO can apply a failure to lodge on time penalty for each 28-day period a BAS is overdue, and general interest charge applies to unpaid amounts. If you are behind, we bring the lodgements up to date, request penalty remission where there are grounds, and set up an ATO payment plan where needed. See our guide to [late BAS lodgement penalties](https://42advisory.com.au/42-advisory-blog/late-bas-lodgement-penalty). ### What is included - BAS and IAS preparation, review and lodgement, monthly or quarterly - Reconciliation of GST, PAYG withholding and PAYG instalments to your books - Due date reminders and payment timing that suits your cash flow - PAYG instalment variations when your income changes - ATO correspondence and payment plans For the full year's dates, see our [ATO due dates guide](https://42advisory.com.au/42-advisory-blog/key-ato-due-dates-bas-payg-fbt-super-tpar). If your books need work before each BAS, our [bookkeeping service](https://42advisory.com.au/services/small-business-bookkeeping-melbourne) keeps them ready. ![Illustration of a professional analysing financial charts and tax data — representing 42 Advisory’s proactive BAS and IAS management, planning, and compliance services.](https://42advisory.com.au/hubfs/Graphic%20images/Asset%2041.svg) Why Businesses Trust 42 Advisory for BAS & IAS ## Proactive. Organised. Always One Step Ahead. Our approach is simple — no last-minute surprises, no confusion, and no missed deadlines. We help you manage your BAS and IAS obligations efficiently, while keeping your business cash flow steady and predictable. Our proactive calendar and regular communication keep you informed of all due dates, payment amounts, and ATO requirements — so you’re always prepared. We provide a fixed-fee service without surprises. [Learn more about fixed fee vs hourly billing](https://42advisory.com.au/42-advisory-blog/fixed-fee-accounting-vs-hourly-billing-whats-best-for-your-business) > **“We speak your language — timing, planning, and compliance.”** > Because great accounting isn’t just about numbers — it’s about giving you peace of mind. YOU MAY NEED TO KNOW ## Frequently Asked Questions About BAS & GST in Melbourne What is the GST threshold in Australia? The current GST registration threshold is **$75,000 in annual turnover** ($150,000 for non-profit organisations). If your business turnover exceeds this amount — or is expected to — you must register for GST and begin lodging Business Activity Statements (BAS). Even if your turnover is below $75,000, you may voluntarily register if it improves your cashflow position or commercial credibility. For Melbourne SMEs, reviewing this threshold before EOFY is critical to avoid unexpected compliance obligations. Who needs to lodge a BAS? You must lodge a Business Activity Statement (BAS) if your business is registered for GST. This includes: - Sole traders - Companies - Trusts - Partnerships Your BAS reports: - GST collected and paid - PAYG withholding - PAYG instalments - Other ATO obligations If you operate in Melbourne and are unsure whether registration is required, it’s important to assess turnover before crossing the threshold. Do I need to register for GST if I earn under $75,000? If your turnover is under $75,000, GST registration is generally not compulsory. However, voluntary registration may be appropriate if: - Your clients are GST-registered businesses - You incur significant GST on expenses - You want to present as an established operation We regularly advise Melbourne startups and growing businesses on whether voluntary registration strengthens or weakens their financial position. What is the difference between a BAS and an IAS? A **Business Activity Statement (BAS)** is issued to businesses registered for GST. An **Instalment Activity Statement (IAS)** is usually issued when: - You need to report PAYG withholding - You pay PAYG instalments Many businesses receive IAS before crossing the GST threshold, then transition to BAS once registered. Understanding the distinction avoids incorrect reporting and missed lodgements. How often do I need to lodge a BAS? Most small to medium businesses lodge BAS **quarterly**. Standard quarterly due dates are: - 28 October - 28 February - 28 April - 28 July If you use a registered tax agent, you may be eligible for extended lodgement deadlines. Businesses with GST turnover of $20 million or more must lodge monthly. Smaller businesses can choose monthly reporting. Can I do my own BAS? Yes — you can lodge your own BAS using: - ATO Online Services - Accounting software such as Xero - myID-linked platforms However, common errors include: - Incorrect GST coding - Claiming ineligible input tax credits - Failing to reconcile payroll withholding - Misreporting PAYG instalments For established SMEs, professional oversight significantly reduces audit exposure and improves cash flow forecasting accuracy. Do I need a BAS agent or an accountant to lodge BAS? You are not legally required to use an accountant. However, using a **registered BAS Agent or Tax Agent** ensures: - Correct GST treatment - Compliance with current ATO rulings - Accurate PAYG reconciliation - Reduced penalty risk - Strategic advice beyond compliance 42 Advisory is a registered tax agent servicing Melbourne businesses and professionals. How much does BAS lodgement cost? Fees depend on transaction volume, payroll complexity, the condition of your records and any advice you need. 42 Advisory quotes BAS work as a fixed fee, agreed in writing before we start. BAS lodgement can be included in an ongoing fixed-fee engagement, so it is not billed per lodgement. ## Stay Ahead of BAS & IAS Deadlines [Schedule a Strategy Meeting](https://42advisory.com.au/meetings/42advisory/initial-meeting-online) **Areas We Serve** - [Melbourne](https://42advisory.com.au) - [Chadstone](https://42advisory.com.au/accountants/chadstone/) - [Moorabbin](https://42advisory.com.au/accountants/moorabbin) - [Bentleigh](https://42advisory.com.au/accountants/bentleigh) - [Oakleigh](https://42advisory.com.au/accountants/oakleigh) - [Burwood](https://42advisory.com.au/accountants/burwood) - [Carnegie](https://42advisory.com.au/accountants/carnegie) - [Caulfield](https://42advisory.com.au/accountants/caulfield) **Business Advisory** - [Business Advisory & 3-Way Forecasting](https://42advisory.com.au/services/business-advisory-forecasting) - [Tax Planning](https://42advisory.com.au/services/tax-planning-melbourne) - [R&D Tax Incentive](https://42advisory.com.au/services/r-and-d-tax-incentive) - [Business Valuation](https://42advisory.com.au/services/business-valuations) - [Residential Finance](https://42advisory.com.au/finance/residential-finance-services-melbourne) - [Buying a Business](https://42advisory.com.au/services/buying-a-business-due-diligence-melbourne) - [Commercial Finance](https://42advisory.com.au/finance/commercial-finance-services) - [Asset Finance](https://42advisory.com.au/finance/asset-finance-solutions) **Accounting & Tax** - [Small Business Accountants](https://42advisory.com.au/services/small-business-accountant-melbourne) - [Personal Tax Returns & Advisory](https://42advisory.com.au/services/personal-tax-accountant-melbourne) - [SMSF Accountants](https://42advisory.com.au/services/smsf-accountant-melbourne) - [BAS & IAS Lodgement Services](https://42advisory.com.au/services/bas-ias-accountant-services-melbourne) - [Property Tax](https://42advisory.com.au/services/property-tax-accounting-melbourne) - [CPA Accountant & Advisory Services Melbourne](https://42advisory.com.au/services/cpa-accountant-melbourne) - [Bookkeeping](https://42advisory.com.au/services/small-business-bookkeeping-melbourne) - [Crypto Tax for Investors & Traders](https://42advisory.com.au/industries/crypto-tax-accounting-for-investors-traders) **Industries** - [Accounting for Doctors](https://42advisory.com.au/industries/accounting-advisory-for-doctors-dentists-health-practices) - [E-Commerce & Online Retail](https://42advisory.com.au/industries/ecommerce-accountants-melbourne) - [Tech, SaaS & IT](https://42advisory.com.au/industries/tech-saas-accounting) - [Crypto Tax & Accounting](https://42advisory.com.au/industries/crypto-tax-accounting-for-investors-traders) - [MMA, BJJ & Muay Thai Gyms](https://42advisory.com.au/industries/martial-arts-combat-sports-gym-accountants-melbourne-42-advisory) - [Accounting for Builders & Trades](https://42advisory.com.au/industries/builders-tradies-accountants-melbourne) - [Accounting for Professional Services](https://42advisory.com.au/industries/professional-services) - [Startup Accounting & Advisory](https://42advisory.com.au/industries/startup-accounting-advisory-services-melbourne) - [Hospitality Accounting (Cafés & Restaurants)](https://42advisory.com.au/industries/cafés-restaurants-retail-stores) - [Automotive & Mechanical Services](https://42advisory.com.au/industries/automotive-accountants-melbourne) --- [![42 Advisory logo – Melbourne accountants and business advisors](https://42advisory.com.au/hubfs/Logo%201%20Black_Vector.svg "42 Advisory logo – Melbourne accountants and business advisors")](https://42advisory.com.au/) Waterman Moorabbin, Level 1, 13–15 Cochranes Road, Moorabbin VIC 3189  [info@42advisory.com.au](mailto:enquiry@42advisory.com.au) 03 9997 7081 Suite 752, Level 2 UL40, 1341 Dandenong Road, Chadstone, VIC 3148​ [enquiry@42advisory.com.au](mailto:enquiry@42advisory.com.au) 03 9997 7081 © 2026 Forty Two Advisory | Terms and conditions| [Privacy Policy](https://42advisory.com.au/privacy-policy) | [Site Map](https://42advisory.com.au/sitemap.xml) Liability limited by a scheme approved under Professional Standards Legislation ```json { "@context" : "https://schema.org", "@id" : "https://42advisory.com.au/#website", "@type" : "WebSite", "inLanguage" : "en-AU", "name" : "42 Advisory", "publisher" : { "@id" : "https://42advisory.com.au/#accountingservice" }, "url" : "https://42advisory.com.au/" } ``` ```json { "@context" : "https://schema.org", "@id" : "https://42advisory.com.au/services/bas-ias-accountant-services-melbourne#webpage", "@type" : "WebPage", "about" : { "@id" : "https://42advisory.com.au/services/bas-ias-accountant-services-melbourne#service" }, "description" : "BAS and IAS lodgement for Melbourne businesses by a registered tax agent. 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