Australia Reverse GST Calculator
Australia GST is 10% on most taxable supplies. Divide tax-inclusive AUD totals by 1.10 for the ex-GST amount on receipts and online orders.
Enter the total you paid (GST included) and your rate.
Step 2 — Your breakdown
We reverse the tax using the standard formula:
Enter a total and tax rate to see your breakdown.
GST is embedded in many B2C prices. A$110 often means A$100 ex-GST plus A$10 GST when the full rate applied.
GST-free items include some fresh food and medical—split lines before dividing one gross total.
Sydney and Melbourne hospitality receipts may mix GST-free fresh ingredients with taxable prepared meals—reverse per taxed line before one divisor on the bill total.
Registered businesses claim GST credits on purchases. Reverse GST on tax-inclusive expenses before lodging BAS figures.
Brisbane ecommerce sellers reverse GST on tax-inclusive Shopify and Amazon.com.au gross deposits before quarterly BAS reconciliation.
Business Activity Statements tie GST on sales and purchases to invoice lines. Reverse GST on tax-inclusive vendor bills before 1A and 1B labels match ATO expectations.
GST-free exports and input-taxed financial supplies follow separate rules—do not apply 1.10 to lines showing no GST on the tax invoice.
Ex-GST = inclusive ÷ 1.10.
Mixed supermarket baskets combine GST-free and 10% lines—split each taxed subtotal before reverse calculation on the grand total for expense reports.
Melbourne Shopify sellers reversing GST on tax-inclusive gross payouts need per-order 10% splits before BAS 1A reporting—not one flat rate on all settlement rows.
| Rate | Category | Examples |
|---|---|---|
| 10% GST | GST | Australian goods and services tax. |
| Varies | Sector exceptions | Financial services, healthcare, and exports may use different treatment. |
A$110 at 10% GST.
Ex-GST A$100 | GST A$10
BAS reporting when registered. Confirm GST-free categories on ato.gov.au. Small businesses should archive tax invoices linking inclusive expenses to ex-GST and GST for BAS 1A/1B reconciliation.
10% on most taxable supplies.
Ex-GST A$100.
Many fresh foods are GST-free—check receipt.
New Zealand GST is 15%, not 10%.
Split GST-free fresh food from 10% taxable lines before reverse calculation on the total.
Archive tax invoices linking inclusive expenses to ex-GST and GST for 1A/1B reconciliation.
Reverse 10% GST per order from tax-inclusive AUD gross before quarterly BAS filing.
Split 10% GST from tax-inclusive tool rental receipts before ATO expense coding.
