A GST Calculator helps calculate Goods and Services Tax quickly and accurately on prices. It supports GST-inclusive and GST-exclusive amounts using the standard Australian GST rate, making tax calculations simple and reliable.
Goods and Services Tax (GST) in Australia is a 10% broad-based tax applied to most goods, services, and other items sold or consumed in the country. Businesses that are registered for GST are required to include this tax in their prices and report it to the Australian Taxation Office (ATO). While GST applies to most transactions, certain items such as basic food, medical services, education, and some exports are either GST-free or input-taxed under Australian tax law.
A GST Calculator Australia is a useful tool that helps individuals and businesses accurately calculate GST on prices. It allows users to add GST to a net amount, remove GST from a total price, or clearly break down the GST component. This is especially helpful for preparing invoices, checking receipts, setting prices, and managing accounts. Using a GST calculator ensures calculations are accurate, saves time, and helps maintain compliance with Australian GST rules for both businesses and consumers. Read more if you want to know about GST Tax in Australia on Wikipedia
| What You Want to Calculate | Starting Price | Formula (10% GST) | Real-Life Example |
|---|---|---|---|
| Add GST → total amount customer pays | Price excluding GST | Amount × 1.1 | Quote $400 for a job $400 × 1.1 = $440 (invoice total) |
| Find only the GST amount to add | Price excluding GST | Amount × 0.1 | $400 job $400 × 0.1 = $40 GST |
| Remove GST → original price before tax | Price including GST | Amount ÷ 1.1 | Receipt says $440 $440 ÷ 1.1 = $400 (pre-GST price) |
| Extract just the GST from a total | Price including GST | Amount ÷ 11 | $440 total on receipt $440 ÷ 11 = $40 (GST paid) |
Calculating GST in Australia is simple once you understand the standard rate and the difference between GST-inclusive and GST-exclusive prices. The Goods and Services Tax (GST) is charged at 10% on most goods and services sold in Australia. To add GST to a price, multiply the GST-exclusive amount by 1.10. For example, if a product costs $200 before GST, the total price becomes $220, where $20 is the GST portion. To remove GST from a GST-inclusive amount, divide the total price by 11 to find the GST value, or divide by 1.10 to find the GST-exclusive amount. For example, $110 ÷ 11 = $10 GST. Businesses use these formulas when issuing invoices, preparing BAS statements, or calculating tax obligations. A GST Calculator makes the process easier by instantly showing GST amounts, total price, and pre-GST values for both individuals and businesses.
You must register for GST in Australia when your business or enterprise reaches the mandatory GST turnover threshold of $75,000 per year. For non-profit organisations, the threshold is $150,000. You must also register if you provide taxi or rideshare services, including platforms like Uber, regardless of income. Businesses that expect to reach the threshold in the near future are required to register proactively, not after exceeding it. Additionally, you must register if you operate an importing or exporting business, run an online store targeting Australian customers, or wish to claim input tax credits. Voluntary registration is also available for small businesses—even those below the threshold—allowing them to claim GST credits on business purchases and appear more credible to clients. Once registered, businesses must charge 10% GST on taxable sales, lodge Business Activity Statements (BAS), and keep accurate financial records.
Registering for GST is simple and can be done online using your Australian Business Number (ABN).
Get an ABN through the Australian Business Register.
Log in to the ATO Business Portal or MyGov for business.
Go to Business Registration.
Select Goods and Services Tax (GST).
Provide business details, turnover estimate, and accounting method.
Submit the application.
You also have the option to register through:
A tax agent
An accountant
ABR website when applying for your ABN
To “sign up” means completing GST registration with the ATO. Once approved, your business must start charging GST on sales and lodging BAS either monthly, quarterly, or annually.
In Australia’s GST framework, the distinction between GST-Free and input-taxed supplies is critical for accurate tax compliance and financial reporting. Although both categories are sold without GST, their treatment for credit claims and BAS submissions differs significantly.
GST-free supplies—such as basic food, certain health and medical services, education, and exports—are not subject to GST on the sale. However, businesses retain the right to claim GST credits on related purchases. This ensures that providers of essential or internationally supplied goods and services are not disadvantaged by unrecoverable tax costs.
By contrast, input-taxed supplies—including residential rent, financial services, and select fundraising activities—are also sold without GST, but businesses cannot claim GST credits on expenses incurred to make these supplies. This restriction directly impacts margin calculations, pricing decisions, and overall tax planning.
Registering for GST in Australia offers several important benefits for businesses, especially those looking to grow or operate professionally. One of the biggest advantages is the ability to claim GST credits on business-related purchases, reducing overall expenses. This means you can recover the GST paid on items like equipment, supplies, and services. Being GST-registered also enhances your business’s credibility, as many clients—especially larger companies—prefer working with businesses that are fully compliant with ATO requirements. Registration can help you appear more established and trustworthy. Additionally, charging GST allows you to maintain accurate financial records, which improves cash flow management and tax reporting. It also helps businesses avoid penalties by ensuring compliance once the turnover threshold is reached. For startups and small enterprises, voluntary registration can make your business more competitive and streamlined from day one.
GST (Goods and Services Tax) is a consumption tax applied to most goods and services sold in Australia. Businesses collect GST on sales and remit it to the ATO on behalf of consumers.
It is included in the final price customers pay and is designed to simplify indirect taxation across the economy.
The standard GST rate in Australia is 10%. This applies to the majority of taxable goods and services sold locally.
Some items are GST-free (e.g., basic groceries, some medical services) and therefore not charged at 10%.
To add GST: multiply the base price by 0.10 (10%). Example: $100 × 0.10 = $10 GST; total = $110.
To extract GST from a GST-inclusive price: divide the total by 11; the remainder is the GST portion.
Register for GST through the Australian Business Register (ABR) or via the ATO Business Portal. You will need an ABN and basic business details.
Registration is mandatory if your annual turnover is $75,000 or more ($150,000 for non-profit organisations), though businesses can choose to register voluntarily if under the threshold.
Signing up means completing your GST registration with the ATO. Use your ABN and business information to register online or through a registered tax agent.
After registration, you will be able to charge GST, lodge Business Activity Statements (BAS), and claim GST credits on eligible purchases.
Electricity supplied to households and businesses in Australia generally includes GST at the standard 10% rate. The GST amount should appear on your electricity bill.
Some specific energy concessions or government rebates may affect the final billed amount, but GST is normally applied to the supply charge.
Calculate GST by multiplying the pre-tax amount by 0.10 to get the GST component. For GST-inclusive totals, divide the amount by 11 to extract GST.
Using an online GST calculator removes manual errors and speeds up quoting, invoicing, and bookkeeping tasks.
GST in Australia is a broad-based consumption tax introduced to standardise indirect taxes across states. The rate is currently 10% on most taxable supplies.
The ATO administers GST collection, reporting, and compliance; businesses must register and lodge BAS if they meet the threshold.
To register for GST, obtain an ABN and complete registration through the ABR website or ATO Business Portal. You can also register through a tax agent or accountant.
Keep records of sales and purchases, as you will need them for BAS lodgement and claiming GST credits on eligible business expenses.