Australian GST Calculator

Calculate GST, GST-inclusive prices and GST-exclusive prices using the Australian 10% Goods and Services Tax rate.

GST Calculation Type

Choose whether you want to add GST, remove GST from an existing price, or calculate only the GST component.

Price Details

Enter the price you want to calculate GST on. For example, enter $100 to add GST or $110 to remove GST.

GST Rate

The standard Australian GST rate is 10%. Change this only if you are calculating a different GST percentage.

Business GST Details

Businesses generally register for GST when they meet the Australian GST registration requirements.

GST Collected From Sales

Enter GST charged on your taxable sales. This is the GST you may need to report to the ATO.

GST Paid On Purchases

Enter GST included in business expenses that may qualify as GST credits.

Business Activity Statement (BAS) Estimate

This provides an estimate only of GST payable or refundable. Your BAS depends on your complete business records.

Enter your details to calculate GST

Australian GST Calculator Guide

Our free Australian GST Calculator helps individuals, businesses and sole traders calculate Goods and Services Tax (GST), GST-inclusive prices and GST-exclusive prices.

The standard GST rate in Australia is 10%. This means GST is added to most taxable goods and services sold by businesses registered for GST.

What Is GST In Australia?

Goods and Services Tax (GST) is a broad-based tax of 10% applied to most goods and services consumed in Australia.

Businesses registered for GST collect GST from customers and generally report this information to the Australian Taxation Office through their Business Activity Statement (BAS).

How To Use The GST Calculator

Select whether you want to add GST, remove GST from an existing amount or calculate the GST component only.

Enter the price amount
Confirm the GST percentage
Calculate GST amount
View GST-inclusive or GST-exclusive price

GST Formula Explained

Adding GST:

Price × 10% = GST amount

Price + GST = Total GST-inclusive price

Example: A product costing $100 before GST will have $10 GST added, making the final price $110.

Removing GST From A Price

If a price already includes GST, the GST component can be calculated by dividing the amount by 11.

Example: A $110 GST-inclusive price contains $10 GST and $100 before GST.

GST For Small Businesses

Many Australian businesses need to register for GST when their turnover reaches the GST registration threshold.

Once registered, businesses generally:

Add GST to taxable sales
Record GST collected
Claim eligible GST credits
Report GST through BAS

GST Credits And Business Purchases

Businesses may be able to claim GST credits for GST included in eligible business purchases.

For example, if a business buys equipment containing GST, the GST portion may be available as a credit if requirements are met.

GST Collected And GST Paid

Your BAS GST position is generally calculated by comparing:

GST collected from customers
GST credits from eligible purchases

If GST collected is higher than GST credits, the difference may need to be paid to the ATO. If GST credits are higher, a refund may apply.

GST-Free Items Australia

Some goods and services may be GST-free, including certain:

Basic food products
Medical services
Some education services
Certain childcare services

GST rules can be complex, so businesses should check their specific circumstances.

Common GST Mistakes

Forgetting to include GST in pricing
Incorrectly claiming GST credits
Not keeping proper records
Missing BAS reporting deadlines

Frequently Asked Questions

What is the GST rate in Australia?

The standard GST rate in Australia is 10%.

How do I calculate GST on a price?

Multiply the GST-exclusive price by 10% to calculate GST, then add it to the original price.

How do I remove GST from an amount?

Divide a GST-inclusive price by 11 to find the GST component.

Do all businesses need to register for GST?

No. GST registration depends on factors including business turnover and circumstances.

Does this calculator store my information?

No. Calculations happen in your browser. Financial Toolkit does not store your financial details.

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