BAS Estimator

Calculate your quarterly BAS using official ATO field labels. Copy values directly to your myGov BAS lodgement.

GST on Sales

Enter your sales figures for the quarter (GST-inclusive)

$
$
$

GST on Purchases

Enter your business purchases (GST-inclusive)

$

Equipment, vehicles, property over $1,000

$

Operating expenses, supplies, subscriptions

PAYG Instalments

For quarterly instalment taxpayers

$

Your income this quarter (GST-exclusive)

%

Leave blank to estimate from income. Check your ATO letter for your actual rate.

Quick Examples

Quarter Details

Financial YearFY2025-26
QuarterQ2 (Oct-Dec)
Due Date28 February 2026

BAS Summary - ATO Fields

Q2 FY2025-26 • Due: 28 February 2026

GST

G1Total sales (including GST)
$0
G11Non-capital purchases (including GST)
$0
1AGST on sales
$0
1BGST on purchases
$0

Summary

GSTNet GST (1A - 1B)
$0
8AAmount owing
$0

Set Aside Monthly

$0

Save this amount each month to cover your quarterly BAS

About ATO Field Labels

These field labels match your myGov BAS lodgement form exactly:

  • G1-G11: GST calculation worksheet fields
  • 1A/1B: GST on sales and purchases
  • T1-T9: PAYG instalment fields
  • 8A/8B/9: Final payment or refund amounts

Click the copy button next to any field to copy the value for pasting into myGov.

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Disclaimer: This calculator provides estimates only and does not constitute financial or tax advice. PAYG instalment calculations are simplified estimates. Your actual PAYG rate is determined by the ATO based on your prior year tax return. Always verify figures with your accounting records before lodging. TaxRoo is not a registered tax agent.