What is a Tax File Number?

A Tax File Number (TFN) is a unique nine-digit identifier issued by the Australian Taxation Office (ATO). It's one of the most important numbers you'll need when living and working in Australia. Your TFN is used to track your income, tax payments, and benefits across all Australian government agencies.

Whether you're a new migrant, international student, temporary worker, or permanent resident, you'll almost certainly need a TFN. Your employer will ask for it, the ATO will need it for tax purposes, and Centrelink (Services Australia) will require it if you apply for any government payments or benefits.

The TFN is confidential and personal to you. Never share it with anyone except authorized government agencies, your employer, your bank, or your accountant. Protecting your TFN is important for your financial security and privacy.

Who Needs a Tax File Number?

Most people living and working in Australia need a TFN. This includes:

  • International students – even if you're studying part-time and earning income
  • Temporary visa holders – including working holiday visa holders, skilled migration visa holders, and temporary resident visa holders
  • Permanent residents and Australian citizens – required for employment and tax purposes
  • Self-employed people – if you run a business or freelance
  • People receiving government benefits – such as unemployment payments or family tax benefits
  • Anyone earning income in Australia – regardless of visa status

If you're visiting Australia temporarily and not working, you may not need a TFN immediately. However, if you plan to work even a few hours, you should apply for one before you start.

How to Apply for a Tax File Number

There are several ways to apply for a TFN in Australia. The method you choose depends on your visa status, location, and personal circumstances.

Online Application

The easiest and fastest way to apply is online through the ATO website. You can apply at any time, and you'll receive your TFN within 7 to 10 business days if you're eligible.

To apply online, you'll need:

  • Your date of birth
  • Your full name as it appears on your identity documents
  • Your current Australian address
  • Your passport number and country of issue (if you're not an Australian citizen)
  • Your visa details (if applicable)
  • An email address to receive your TFN

Visit the Australian Taxation Office website to start your online application. The process is straightforward and takes about 10 minutes.

Paper Application

If you prefer to apply by mail or cannot apply online, you can use the paper form. Download the TFN application form from the ATO website, complete it, and mail it to the address provided. Processing times are longer for paper applications – typically 4 to 6 weeks.

In Person at an ATO Office

You can visit an ATO office in person to apply. Bring your passport and any other identity documents. Staff will help you complete the application on the spot. This option is useful if you need your TFN urgently or have questions about the process.

Through Your Employer

Some employers can help you apply for a TFN. Ask your employer's HR or payroll department if they offer this service. They may be able to submit your application on your behalf, which can speed up the process.

What Documents You'll Need

The documents required depend on your visa status and citizenship. Generally, you'll need:

  • Proof of identity – a valid passport is the most common form of ID accepted
  • Proof of Australian address – a recent utility bill, rental agreement, or letter from your accommodation provider
  • Visa details – your visa number and expiry date (if you're on a temporary visa)
  • Personal details – your full name, date of birth, and contact information

If you're applying online, you won't need to provide physical documents. The ATO will verify your identity electronically using information from the Department of Home Affairs.

If you're applying by mail or in person, include certified copies of your identity documents. A certified copy is a photocopy of your original document that has been certified as a true copy by an authorized person, such as a lawyer, accountant, or notary public.

Timeline and What to Expect

The time it takes to receive your TFN depends on how you apply:

  • Online application – 7 to 10 business days
  • Paper application – 4 to 6 weeks
  • In-person application – same day or within a few days

Once your application is approved, the ATO will send your TFN to you by email (if you applied online) or by mail (if you applied by paper). Keep this information safe – you'll need your TFN for employment, tax returns, and government services.

If you don't receive your TFN within the expected timeframe, contact the ATO. You can call their helpline or visit your nearest ATO office. Have your application reference number ready when you contact them.

Starting Work Before Your TFN Arrives

If you need to start work before your TFN arrives, inform your employer. They may ask you to provide your TFN as soon as you receive it. In the meantime, they'll need to withhold tax from your wages at the highest rate until you provide your TFN. Once you give them your TFN, they can adjust your tax withholding.

Using Your Tax File Number

Once you have your TFN, you'll use it for:

  • Employment – provide it to your employer for payroll and tax purposes
  • Tax returns – required when you lodge your annual tax return with the ATO
  • Government benefits – needed to apply for Centrelink payments or family tax benefits
  • Banking – some banks ask for your TFN when opening an account
  • Superannuation – your employer needs your TFN to set up your superannuation account
  • Study – universities and vocational training providers may ask for your TFN

Keep your TFN confidential. Never share it with anyone except authorized government agencies, your employer, your bank, or your accountant. Be cautious of scams – the ATO will never contact you by email or text message asking for your TFN.

Useful Official Sources

Frequently Asked Questions

What is a Tax File Number (TFN) and why do I need one?

A TFN is a unique nine-digit identifier issued by the Australian Taxation Office (ATO) that tracks your income, tax payments, and benefits. You'll need it to work, pay taxes, and access government services in Australia.

How do I get a Tax File Number as a new migrant?

You can apply for a TFN through the Australian Taxation Office (ATO) online, by phone, or in person at an ATO office. As a new migrant, you'll need to provide proof of identity and visa documents.

Who should I never share my TFN with?

Your TFN is confidential and should only be shared with authorized government agencies, your employer, your bank, and your accountant. Never share it with anyone else to protect your financial security and privacy.

Will I need a TFN if I'm only planning to study in Australia?

Yes, international students need a TFN even if they're studying part-time and earning income. You'll need it for employment and to access any government payments or benefits.

This is general information only. It is not legal, migration, financial, tax, medical, or professional advice. Always check official sources before acting.