Goods and services tax (GST) registration does not happen automatically when you start trading. Whether you need GST for small business registration depends on your turnover, business structure and the specific work you do. This means two businesses with similar turnover can have very different requirements.
The figure most people recognize is $75,000. This is the minimum annual turnover that requires GST registration for small businesses. You also need an Australian Business Number (ABN) to register. The rules vary depending on whether you are a sole trader, a company, a non-profit, or a taxi driver. If you register for GST late, the ATO can backdate your registration. This means that even if you never charged your customers GST, the ATO will backdate the registration and apply GST to any sales you made.
This article explains what determines GST for small business obligations. It covers how to calculate your turnover, the registration steps, and what to think about if you are below the threshold but contemplating your options.
Goods and services tax (GST) is a 10% tax applied to most goods and services offered in Australia.
GST is also known as “indirect tax”, meaning that businesses add the GST onto the sale price of the taxable goods and services. Eligible businesses are responsible for collecting the tax and passing it on to the Australian Taxation Office (ATO) rather than the government taking it directly from buyers. The tax authorities will use revenue funds for public services, including healthcare, education and infrastructure, and it is split between the federal government and the states.
Not every business has to register for GST. There are 2 types of GST registration:
Here are 4 conditions that you have to register for GST:
You must have an ABN before you can register for GST. When you start a new business, it is common and more efficient to apply for GST registration at the same time as your ABN, rather than handling them as two separate processes.
GST is not only for Australian businesses. If you are a foreign business selling imported services, digital products or goods to Australian consumers and your sales related to Australia reach the $75,000 threshold, you may need to register for GST. The ATO has created a separate registration process for non-resident sellers, as this situation often comes up and needs its own approach. However, many international e-commerce sellers entering the Australian market overlook this requirement.
Many business owners make mistakes when checking their GST turnover threshold. This happens not because the threshold is difficult, but because the ATO requires two ongoing calculations:
If either one reaches $75,000, you are required to register even if the other one is below it.
Imagine you run an online homewares business. If you calculate your sales for this month together with the previous 11 months and you get $58,000, which does not trigger GST registration. However, your orders have increased and if this trend continues, it is reasonable to project an income of $82,000 over the next 12 months, which triggers registration. You can also be legally required to register before you have actually crossed $75,000 in the bank.
The second common mistake is treating turnover as profit. GST turnover is gross income, which is the total amount customers paid you. If you sell stocks for $80,000 and end up with $35,000 after all your costs, including stock expenses, rent, and other expenses, that is still above the limit.
Tips: Check your turnover monthly, not annually. It is based on a 12-month rolling period rather than a fixed financial year. You could reach $75,000 mid-year without realizing it, and your 21-day registration period starts as soon as that happens, not when you review your finances.
The process of registering for GST is not complicated.
Once your current or expected GST turnover hits $75,000, or $150,000 for non-profits, you need to register within 21 days. This countdown starts from the day you reach or anticipate reaching the threshold, not from when you realize it. That’s why it’s important to keep an eye on your turnover regularly.
You will require these information or documents to register for GST:
A registered tax agent or BAS agent can complete the GST registration for you if you prefer not to do it yourself. Many small business owners choose this option to make sure the registration and ongoing reporting are set up correctly from the beginning.
Even if your turnover is under $75,000, you can choose to register for GST voluntarily. For many small businesses and early-stage companies, this is a strategic choice rather than simply a compliance matter.
Registering early also means adding 10% GST to your prices from the beginning. If you sell directly to consumers who are not GST-registered, your prices might look 10% higher than those of a competitor who is not registered, unless you decide to absorb the GST within your margins instead of passing it on. It is important to consider both options—passing the cost on and absorbing it—before choosing to register voluntarily, especially if you operate in a competitive and price-sensitive market.
Once you register voluntarily, all standard GST requirements apply. You cannot choose which rules to follow. Cash basis accounting is available to most businesses with a combined turnover of less than $10 million. It helps match GST liabilities with actual cash receipts.
Missing the GST registration deadline can lead to financial problems.
If the ATO determines that you should have registered for GST from an earlier date, you may be required to pay GST on your sales since that date, even though you did not charge your customers any GST. This means that you will have to pay the GST out of your profit margin instead of being collected from customers because you cannot go back and add 10% to invoices that have already been paid.
The ATO can generally backdate your registration and the related GST liability for up to four years, and penalties plus interest may also be charged on top of the amount owed. The longer a business continues trading above the threshold without registering, the larger this potential liability grows. That’s why regularly monitoring your turnover is important.
The registration process for GST is not automatic and is different for every business. Before registering for GST, take a look at the position of your business: check your ABN status; conduct a threshold check; confirm whether any special triggers apply to you; review your registration timing; get your reporting setup sorted and decide whether you register for GST voluntarily if you are under the threshold.
If you are not yet sure about the position of your business, a registered tax or BAS agent can review your current situation and manage registration on your behalf. The ATO’s website also has current information on turnover calculation, threshold for registration and reporting requirements.
GST registration is one part of keeping your finances in order and ensuring good cash flow as your business grows. If you are an Australian SME or e-commerce business seeking flexible funding to meet your tax obligations, Choco Up is here to help you. Check your eligibility today to find out how quick and friendly financing options can help with your next stage of growth.
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