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BAS Calculator Australia

Estimate your quarterly Business Activity Statement โ€” net GST payable, PAYG withholding and PAYG instalments.

Last verified: June 2025  |  2025โ€“26 ATO BAS rules | Quarterly due dates

๐Ÿ“‹ BAS Estimate โ€” Quarterly

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Total BAS Payment to ATO
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Net GST payable
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PAYG withholding
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PAYG instalment

๐Ÿ“‹ BAS Breakdown

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BAS in Australia: A Plain-English Guide

A Business Activity Statement (BAS) is a form submitted to the ATO to report and pay your business tax obligations โ€” primarily GST and PAYG. Most businesses lodge quarterly, with due dates 28 days after the end of each quarter.

BAS Lodgement Dates 2025โ€“26

What's on a BAS?

Estimates only. Consult a registered BAS agent or tax agent for your specific BAS. Lodge via myGov or your accounting software.

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