Important deadlines

Quarterly BAS deadlines for tradies

Never miss a Business Activity Statement deadline. Complete guide to quarterly reporting with important dates, tips, and reminders.

Calculate GST

Current quarter information

Current quarter: January – March 2025 (Q3)  ·  BAS due date: April 28, 2025

2025 quarterly BAS deadlines

Upcoming

Q1 2025

Period: Jul–Sep 2024

Due: October 28, 2024

Status: Overdue

Lodge immediately to avoid penalties
Upcoming

Q2 2025

Period: Oct–Dec 2024

Due: February 28, 2025

Status: Due Soon

Submit by Feb 28 to avoid penalties
Current

Q3 2025

Period: Jan–Mar 2025

Due: April 28, 2025

Status: In Progress

Keep records for this quarter
Future

Q4 2025

Period: Apr–Jun 2025

Due: July 28, 2025

Status: Upcoming

Mark your calendar

BAS reporting timeline

1

Quarter end

March 31, June 30, September 30, December 31

2

Prepare BAS

Gather records, calculate GST, complete form

3

Submit by 28th

28 days after quarter end (April 28, July 28, Oct 28, Feb 28)

4

Pay by due date

Pay any GST owing by the same deadline

How to complete your quarterly BAS

1. Gather your records

  • All sales invoices with GST collected
  • All purchase receipts with GST paid
  • Bank statements for verification
  • Previous BAS statements (if any)

2. Calculate your figures

  • Total GST collected from sales
  • Total GST credits from purchases
  • Net GST amount (collected − credits)
  • Use our GST calculator for help

3. Complete BAS form

  • Log in to myGov → ATO
  • Start new BAS
  • Enter your figures
  • Review and submit

4. Pay on time

  • Pay any amount owing by due date
  • Keep payment confirmation
  • Download BAS statement
  • File for your records

Common BAS issues & solutions

Common problems

  • Missing receipts — can't claim GST credits
  • Late lodgment — penalties apply immediately
  • Incorrect calculations — amendments required
  • Poor record keeping — audit risk
  • Cash flow issues — GST not set aside

Solutions

  • Use accounting software — automated tracking
  • Set calendar reminders — 2 weeks before due
  • Separate GST account — set aside 10%
  • Regular bookkeeping — monthly updates
  • Professional help — accountant or bookkeeper

Set up BAS reminders

Recommended reminder schedule
Calendar reminders
  • 6 weeks before: Gather records start
  • 4 weeks before: Calculate figures
  • 2 weeks before: Complete BAS form
  • 1 week before: Submit if ready
  • 3 days before: Final reminder
Phone/app reminders
  • ATO myGov notifications
  • Calendar app alerts
  • Accounting software reminders
  • Email calendar invites
  • SMS reminder services

Helpful BAS resources

GST calculator

Quick calculator for GST amounts.

Complete GST guide

Everything you need to know about GST.

Need help from the ATO?

Contact ATO

Business line:
13 28 66
8am–6pm weekdays

Emergency helpline:
1800 805 177
For urgent BAS issues

Online resources

myGov:
my.gov.au
Access ATO online services

ATO website:
ato.gov.au
Forms, guides, and tools

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