Apply for an ABN Without a TFN? What You Need to Know

When applying for an Australian Business Number (ABN), one of the first questions you’ll see is whether you want to include your Tax File Number (TFN).

So, do you really need it?

In this article, we’ll walk through:

• Whether you can apply for an ABN without a TFN
• What happens if you don’t include your TFN?
• How to avoid delays and get approved faster

Need an ABN? Start your ABN application with Register My ABN – it takes less than 5 minutes.

1. Can you apply for an ABN without a TFN?

Yes, it’s technically possible to apply without a TFN.

But leaving out your TFN will trigger additional identity checks with the ATO.

This means:

• Your application may be delayed by several weeks
• You may be asked to provide additional identity documents
• Your application could be refused if your identity can’t be confirmed

The ATO strongly recommends including your TFN when you apply to avoid unnecessary delays. Learn how to apply for a Sole Trader ABN.

Tip: Missing your TFN is one of the most common reasons ABN applications are delayed. We cover this (and other mistakes) in our guide to common ABN mistakes.

2. What happens if you don’t include your TFN?

Your TFN helps the ATO verify your identity so they can approve your application without needing manual checks. Your TFN is not displayed publicly - it’s only used to verify your identity securely and process your ABN correctly.

If you submit an application without your TFN:

• The ATO may contact you to request proof of identity (POI) documents
• You may need to send in certified copies of your passport, birth certificate, or driver's licence
• Your application won’t be processed until identity checks are complete

If you’re unable to meet the verification requirements, your application could be declined.

3. How to avoid delays and get approved faster

To avoid delays and get your ABN approved smoothly:

• Include your Tax File Number (TFN)
• Double-check your legal name, date of birth, and residential address
• Select Sole Trader as your structure (if applying as an individual)
• Clearly describe your business activity (e.g. "rideshare driver", "freelance designer")

You can:

• Via the Australian Business Register, it’s free, but often harder and slower
• Or, apply through Register My ABN for an ABN in less than 5 mins for $45 including GST which is fully tax-deductible

Ready to apply for an ABN?

While it’s possible to apply for an ABN without a TFN, it often causes delays and additional paperwork.

Including your TFN:

• Speeds up your application
• Helps the ATO verify your identity
• Reduces the risk of rejection

Need help applying? Use Register My ABN for a fast and easy ABN registration - just $45 incl. GST.