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🇦🇺 Australia

TFN Declaration (Australia)

Australian Tax File Number for Employment

Easy ~10 min TaxAustraliaEmploymentTFN

/ What is this form?

The Tax File Number (TFN) Declaration (NAT 3092) is an ATO (Australian Taxation Office) form completed by every new employee to provide their Tax File Number to their employer and make elections about their tax situation. The TFN is Australia's unique identifier for tax purposes — a 9-digit number that connects an individual to their tax records. Every person working and paying tax in Australia should have one.

The TFN Declaration replaces the informal 'provide your TFN' process and adds important questions: whether to claim the tax-free threshold (the amount of income below which no tax is withheld — AUD $18,200 in 2024-25), whether the employee has outstanding study loans (HECS-HELP, VSL, etc.) requiring compulsory repayments, whether the employee is a tax resident of Australia, and for working holiday makers, their visa status which attracts a different tax rate.

If an employee does not provide their TFN, the employer is legally required to withhold 47% of all earnings (the top marginal rate plus Medicare levy) until a TFN is provided. This creates a strong incentive to submit the TFN Declaration promptly — or to apply for a TFN if not yet registered.

/ Who needs this form?

  • All new employees in Australia starting paid employment, including part-time and casual workers
  • People returning to work who have changed employers
  • International workers on temporary visas who will receive taxable income in Australia
  • Working holiday makers (subclass 417 and 462) who need to declare their visa status
  • Anyone whose tax situation has changed and needs to update their election with an existing employer

/ What you need before you start

Your Australian Tax File Number (TFN) — apply at ato.gov.au if you don't have one
Your full legal name as registered with the ATO
Your residential address in Australia
Date of birth
Knowledge of whether this is your primary job (for tax-free threshold claim)
Study loan information (HECS, VSL, etc.) if applicable
Your visa type if a temporary resident or working holiday maker

/ Step-by-step guide

1 Obtain a TFN First (If You Don't Have One)
If you are new to Australia and don't have a TFN, apply for one first at ato.gov.au/tfn. Processing takes up to 28 days. You can start work without a TFN — your employer will withhold tax at the maximum rate until you provide your TFN. Once received, provide it to your employer and they will adjust future withholding.
2 Enter Personal Details (Questions 1-4)
Enter your full name, residential address, date of birth, and email address. Your name must match the name registered with the ATO for your TFN.
3 Provide Your TFN (Question 5)
Enter your 9-digit Tax File Number. Alternatively, claim an exemption: under 18 and earning below the threshold, or receiving certain pensions. Do NOT share your TFN over email or with anyone other than your employer, bank, or government agencies.
4 Answer Tax-Related Questions
Question 6: Do you want to claim the tax-free threshold? Claim 'Yes' only with your PRIMARY employer (the one from which you earn the most). Question 7: Do you have a study and training loan (HECS-HELP, VSL, SSL, ABSTUDY SSL, TSL)? Question 8: Are you an Australian resident for tax purposes? Question 9: Are you a working holiday maker (visa 417 or 462)?
5 Sign and Give to Employer
Sign and date the declaration. Give it to your employer — they are required to submit it to the ATO. Keep a copy for your records. Your employer uses this information to apply the correct PAYG withholding rate from your first paycheck.

/ Key fields explained

Field What to enter Common mistake
Tax-Free Threshold Claim (Q6) Claim 'Yes' at your PRIMARY employer only — the one where you earn the most. 'No' for all secondary jobs. Claiming the tax-free threshold at two employers simultaneously — this results in insufficient withholding and an unexpected tax debt at year-end.
Study and Training Loan (Q7) Tick 'Yes' if you have any ATO-administered study loan: HECS-HELP, VET Student Loan (VSL), SSL, ABSTUDY SSL, or TSL. Ticking 'No' when you have a HECS-HELP debt — if you earn above the repayment threshold (approximately $51,550 in 2024-25), compulsory repayments should be withheld. Not declaring leads to a large bill at tax time.
Australian Resident for Tax Purposes (Q8) Answer based on whether Australia is your tax home, not just whether you are a citizen. Most people on long-term work or student visas who have established a home in Australia are tax residents. Marking 'No' (non-resident) out of uncertainty when you actually qualify as a tax resident — non-residents are taxed at 32.5% from the first dollar with no tax-free threshold.
Working Holiday Maker (Q9) Tick 'Yes' if you hold visa subclass 417 or 462. Working holiday makers have a 15% tax rate on income up to $45,000. Working holiday makers not declaring their status — without declaring WHM status, they are taxed as non-residents or residents, resulting in incorrect withholding and complicated year-end adjustments.

/ Common mistakes to avoid

Not applying for a TFN before starting work — without a TFN, 47% withholding applies. Apply at ato.gov.au/tfn and note: banks also require a TFN to avoid withholding on interest.
Providing an incorrect TFN — a wrong TFN causes ATO matching errors and may delay tax returns and refunds.
Not updating the declaration when circumstances change (new study loan, change in residency status, becoming a primary employer) — submit a new TFN Declaration when your situation changes.
Sharing TFN via email — the ATO specifically warns against emailing your TFN. Use secure employer portals or in-person submission.

/ Frequently asked questions

Do I need a TFN to work in Australia?

You do not legally need a TFN to work, but without one, your employer must withhold 47% of your pay. It's strongly advisable to apply before starting work. TFNs are issued to Australian citizens, permanent residents, and those on working visas.

What is the tax-free threshold?

The tax-free threshold is AUD $18,200 for the 2024-25 year. If your total income from all sources is below this, you pay no income tax. Claim this threshold at your primary employer by answering 'Yes' to Q6.

What happens if I have multiple jobs?

At your primary (highest-paying) job: claim the tax-free threshold (Q6 = Yes). At all secondary jobs: do NOT claim the threshold (Q6 = No). Secondary employment is taxed at the marginal rate applicable to your additional income.

Is my TFN the same as my ABN?

No. TFN (Tax File Number) is for individuals as employees or recipients of investment income. ABN (Australian Business Number) is for businesses and self-employed people. Employees use TFN; sole traders and contractors often need both.