✓ Copied to clipboard

Home› GST Calculator Australia

🇦🇺 Updated for 2026 · ATO Compliant

Australia's Fastest
GST Calculator

Add GST, remove GST, or reverse calculate instantly. Free tool for Australian businesses, freelancers & consumers.

Live & Free
✓ 10% GST Rate
✓ ATO Compliant
✓ Mobile Friendly
GST Rate: 10% Standard ATO rate since July 2000
📊 Calculation Result — click any value to copy
tap to copy
Excl. GST
$0.00
tap to copy
GST Amount
$0.00
tap to copy
Incl. GST
$0.00
Item Description Amount (AUD) Excl. GST GST (10%) Incl. GST
Total GST: $0.00 Total Excl. GST: $0.00 Total Incl. GST: $0.00

Enter a GST-inclusive price to find the original amount and how much GST was charged.

$
📊 Reverse GST Result
tap to copy
Original Price
$0.00
tap to copy
GST Included
$0.00
tap to copy
Total Paid
$0.00

How to Calculate GST in Australia (2026)

Australia's GST rate has been fixed at 10% since 1 July 2000. Here are the three exact formulas the ATO uses — and that power this calculator.

➕

Adding GST to a Price

Use when you know the price before GST and need the final amount customers pay. Multiply by 1.1.

Price × 1.1 = GST-Inclusive Total
e.g. $500 × 1.1 = $550.00
➖

Removing GST from a Price

Use when you have a GST-inclusive receipt and need the original base amount. Divide by 1.1.

Price ÷ 1.1 = GST-Exclusive Amount
e.g. $550 ÷ 1.1 = $500.00
🔄

Finding the GST Amount

Divide any GST-inclusive price by 11 to extract exactly how much GST was charged — the quickest mental maths trick.

Price ÷ 11 = GST Component
e.g. $550 ÷ 11 = $50.00 GST
📋

BAS & Registration Threshold

You must register for GST if your annual GST turnover reaches $75,000 ($150,000 for non-profits). Ride-share drivers register from dollar one.

Threshold: $75,000 AUD/year
Lodge BAS quarterly — due 28th of month after quarter

GST Calculation Examples for Australian Businesses

Real-world scenarios showing exactly how GST works across different business types in Australia.

Scenario Ex-GST Amount GST (10%) Total Inc-GST
Freelance graphic designer invoice $1,200.00 $120.00 $1,320.00
Tradesperson quote (plumber, Sydney) $850.00 $85.00 $935.00
Monthly accounting software (Xero) $65.00 $6.50 $71.50
Office supplies (ex-GST price) $240.00 $24.00 $264.00
Restaurant meal (inc-GST total) $90.91 $9.09 $100.00
IT consultant (daily rate) $1,500.00 $150.00 $1,650.00
Commercial cleaning service $320.00 $32.00 $352.00
Business vehicle service $545.45 $54.55 $600.00

All calculations use Australia's standard 10% GST rate. Formula: Ex-GST × 1.1 = Inc-GST. To reverse: Inc-GST ÷ 1.1 = Ex-GST. GST amount alone: Inc-GST ÷ 11.

Complete GST Formula Reference — Australia 2026

Every formula you need for Australian GST calculations, sourced from ATO.gov.au.

📐 The Four Core GST Formulas

① Add GST Ex-GST Amount × 1.1 = Inc-GST Price
e.g. $1,000 × 1.1 = $1,100
② Remove GST Inc-GST Price ÷ 1.1 = Ex-GST Amount
e.g. $1,100 ÷ 1.1 = $1,000
③ Find GST in a price Inc-GST Price ÷ 11 = GST Amount
e.g. $1,100 ÷ 11 = $100
④ Calculate GST only Ex-GST Amount × 0.1 = GST Amount
e.g. $1,000 × 0.1 = $100

GST Rates on Common Items in Australia (2026)

Not everything in Australia attracts 10% GST. The ATO classifies all supplies into three categories: Taxable (10%), GST-Free (0%, credits claimable) and Input-Taxed (0%, credits NOT claimable).

Item / Service GST Status Rate
Most goods & professional services Taxable 10%
Fresh fruit, vegetables, bread, milk, meat GST-Free 0%
GP visits, hospital services, ambulance GST-Free 0%
School & university tuition fees GST-Free 0%
Approved childcare services GST-Free 0%
Exports of goods & services overseas GST-Free 0%
Menstrual products (since 2019) GST-Free 0%
Prescription medicines (PBS listed) GST-Free 0%
Residential rent (landlord income) Input Taxed 0%
Financial services (loans, credit cards) Input Taxed 0%
Life insurance premiums Input Taxed 0%
Restaurants, cafes & takeaway food Taxable 10%
Coffee, hot drinks (takeaway) Taxable 10%
Clothing, footwear & accessories Taxable 10%
Ride-sharing (Uber, Didi, GoCatch) Taxable 10%
Car insurance premiums Taxable 10%
Domestic flights (within Australia) Taxable 10%
International flights (departing AU) GST-Free 0%
Digital subscriptions (Netflix, Adobe, Spotify) Taxable 10%
New residential property (developer sale) Taxable 10%

Source: Australian Taxation Office — Types of Supplies. Always confirm your specific situation at ato.gov.au.

Who Needs to Register for GST in Australia?

Understanding your GST registration obligations is essential to staying compliant with the ATO. The rules differ depending on your business type.

🏢

Standard Businesses

You must register for GST when your annual GST turnover reaches $75,000 or more. You have 21 days from crossing this threshold to register with the ATO. Failing to register means you still owe all the GST that should have been collected.

Threshold: $75,000/year
Register within 21 days
🤝

Non-Profit Organisations

Not-for-profit organisations have a higher threshold. Registration is required when GST turnover reaches $150,000 or more per year. Voluntary registration below this threshold is allowed and can benefit charities that make taxable supplies.

Threshold: $150,000/year
Applies to all registered NFPs
🚗

Ride-Share & Taxi Drivers

Uber, DiDi, Ola and taxi drivers must register for GST from their very first dollar of income — there is no $75,000 threshold. This rule has applied since 2015 under the ATO's interpretation that ride-sharing is equivalent to taxi travel.

Threshold: $0 — register immediately
All platforms: Uber, DiDi, GoCatch
✅

Voluntary Registration

Businesses under $75,000 can register voluntarily. This is beneficial if your customers are mostly GST-registered businesses (they can claim your GST back) or if you have significant business expenses with GST you want to recover.

Benefits: claim input tax credits
Consider if B2B-focused

BAS Lodgement Quick Guide — 2026 Due Dates

A Business Activity Statement (BAS) is how you report and pay GST to the ATO. Most Australian businesses lodge quarterly.

Quarter Period Standard Due Date Tax Agent Due Date
Q1 2025–26 1 Jul – 30 Sep 2025 28 October 2025 25 November 2025
Q2 2025–26 1 Oct – 31 Dec 2025 28 February 2026 28 February 2026
Q3 2025–26 1 Jan – 31 Mar 2026 28 April 2026 25 May 2026
Q4 2025–26 1 Apr – 30 Jun 2026 28 July 2026 25 August 2026

The BAS net GST formula is: GST Collected on Sales (Box 1A) minus GST Credits on Purchases (Box 1B) = Net GST Payable. If credits exceed collections, the ATO refunds the difference. Penalties for late lodgement start at $330 per 28-day period. Source: ATO — Business Activity Statements.

How to Claim GST Input Tax Credits

Input tax credits let GST-registered businesses claim back the GST they paid on business purchases — directly reducing what you owe the ATO.

📄

What Qualifies for Credits?

To claim a GST credit you must be GST-registered, the purchase must be for a creditable business purpose, the supplier must have been GST-registered, and you must hold a valid tax invoice for purchases over $82.50.

💰

Calculating Your Credit

The GST credit equals the GST-inclusive purchase price divided by 11. Example: $1,100 office equipment purchase ÷ 11 = $100 credit claimable on your BAS in Box 1B.

Credit = Purchase Price ÷ 11
e.g. $2,200 ÷ 11 = $200 credit
🚫

What Does NOT Qualify?

Private or personal expenses, GST-free purchases (no GST was charged), input-taxed supplies, entertainment expenses (restricted), and the private-use portion of a mixed-use asset cannot be claimed.

📅

When Can You Claim?

Claim credits in the BAS period when you receive the tax invoice. You can also claim missed credits in a later BAS — the ATO allows claims up to 4 years back from the original tax period.

Australian Tax Invoice Requirements (ATO Compliant)

A valid tax invoice is required for all GST-taxable sales over $82.50. Without the correct details, your customer cannot claim GST credits. Here is exactly what the ATO requires.

Required Element Sales Under $1,000 Sales Over $1,000
The words "Tax Invoice" clearly shown ✅ Required ✅ Required
Supplier's ABN (Australian Business Number) ✅ Required ✅ Required
Supplier's name or trading name ✅ Required ✅ Required
Date of issue ✅ Required ✅ Required
Description of goods or services ✅ Required ✅ Required
Total price (including GST) ✅ Required ✅ Required
GST amount shown separately OR statement that price includes GST ✅ Required ✅ Required
Buyer's name or ABN ⬜ Not required ✅ Required
Buyer's address ⬜ Not required ✅ Required
Quantity of goods or services ⬜ Not required ✅ Required

Source: ATO — Tax Invoices. For sales under $82.50 (inc-GST), a simple receipt is sufficient — no tax invoice required.

Frequently Asked Questions About GST in Australia

Answers to the most common GST questions from Australian businesses, freelancers and consumers — updated for 2026.

All information on this page is based on official Australian Taxation Office guidelines. For the most current rules, visit these ATO resources directly.

🏛️

GST Overview

How GST works, rates, and general information

Visit ATO →
📋

Register for GST

How to register, thresholds, and cancellation

Visit ATO →
📊

Lodge a BAS

How to complete and lodge your BAS online

Visit ATO →
⚠️ This calculator provides general guidance based on Australia's standard 10% GST rate as set by the ATO. For complex tax situations, mixed supplies, BAS lodgement, imports, or the GST margin scheme, always consult ato.gov.au or a registered tax agent.