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How To Survive An ATO Audit: A Business Owner's Complete Guide

12 min read January 2025

Getting a letter from the ATO is stressful. But an audit doesn't have to be a disaster. Here's exactly what to do.

First Things First

Don't panic. Don't ignore it. And don't try to handle it alone. The first 14 days are critical.

Step 1: Understand What Type of Audit It Is

Not all ATO contact is a full audit. There are different levels:

  • Review: The ATO wants clarification on specific items. Usually resolved quickly.
  • Audit: A comprehensive examination of your tax affairs. More serious.
  • Investigation: The ATO suspects fraud or serious non-compliance. Get legal help immediately.

Step 2: Respond Within the Deadline

The ATO letter will specify a response deadline — usually 14-28 days. Missing this deadline makes everything worse.

If you need more time, request an extension before the deadline. The ATO is generally reasonable if you communicate.

Step 3: Gather Your Documentation

The ATO will request specific records. Common requests include:

  • Bank statements (all accounts)
  • Receipts and invoices
  • Motor vehicle logbooks
  • Home office calculations
  • Asset registers
  • Loan agreements
  • Contracts and agreements

Provide exactly what they ask for — no more, no less. Don't volunteer additional information.

Step 4: Get Professional Representation

You have the right to have your tax agent communicate with the ATO on your behalf. Use this right.

A good tax agent will:

  • Review the ATO's requests for reasonableness
  • Prepare and organise your response
  • Negotiate on your behalf
  • Identify potential issues before the ATO does
  • Minimise penalties where possible

Step 5: Know Your Rights

You have rights during an audit:

  • Right to be treated fairly and professionally
  • Right to have a representative
  • Right to request reasons for decisions
  • Right to object to amended assessments
  • Right to complain if treated unfairly

What Happens If They Find Issues?

If the ATO finds problems, they'll issue an amended assessment. This may include:

  • Additional tax: The tax you should have paid
  • Interest: Currently around 11% per annum
  • Penalties: 25-75% of the shortfall, depending on circumstances

Penalties can often be reduced through voluntary disclosure, cooperation, and demonstrating reasonable care.

Facing an ATO audit?

We've helped clients through major ATO audits — including one where we saved a client from a $160,000 CGT bill. Don't face the ATO alone.

Get Audit Support