🇦🇺Aussie Agent Skills
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TutorialsApril 24, 2026·7 min read

ChatGPT for Australian Tax: Tips, Prompts & Limitations

What ChatGPT can and can't do for your Australian tax questions.

ChatGPT is surprisingly useful for Australian tax questions — if you know how to prompt it correctly. But it also makes mistakes that could cost you money.

Here's what works, what doesn't, and how to get better answers.

What ChatGPT Gets Right

  • Basic GST calculations (10% rate)
  • General deduction categories
  • Explaining tax concepts in plain English
  • Due date reminders (though verify these)
  • Comparison of business structures (sole trader vs company)

What ChatGPT Gets Wrong

  • Tax brackets: Often uses outdated or US rates
  • Super rates: May not know current SG rate (11.5% for 2024-25)
  • Specific deductions: Makes up rules that don't exist
  • Due dates: Sometimes confuses financial year timing
  • State-specific rules: Mixes up stamp duty between states

Best Prompts for Australian Tax

Always Add Context

Bad prompt:

"What can I claim as a deduction?"

Good prompt:

"I'm an Australian sole trader working from home as a graphic designer. What work-related expenses can I claim as tax deductions for the 2024-25 financial year under ATO rules?"

GST Calculations

"Calculate the GST on an Australian invoice of $2,200 inclusive. Show the GST amount and GST-exclusive price."

BAS Help

"Explain what goes in each field of an Australian BAS statement for a small business that only reports GST quarterly. I'm using the simpler BAS."

Verify with Dates

"What is the current superannuation guarantee rate in Australia as of 2024? When does it next increase?"

The Better Option: Skills

Instead of prompting ChatGPT from scratch each time, you can give it persistent Australian tax knowledge using Custom Instructions or Projects.

Or use a tool like Claude Code or Cursor where you can install skills that stay loaded:

npx skills-au add ato-bas-expert -a claude

This gives the AI up-to-date Australian tax rules without needing perfect prompts every time.

When to Use a Real Accountant

ChatGPT is fine for:

  • Understanding concepts
  • Basic calculations
  • Preparing questions for your accountant

See an accountant for:

  • Actual BAS/tax return lodgement
  • Complex situations (CGT, trusts, SMSF)
  • ATO audits or disputes
  • Business structure decisions

Free Tax Skills

We have 6 Australian tax skills you can use with ChatGPT, Claude, or Cursor — all free.

Browse Tax Skills →