Quick Answer
FIFO income is taxed under the same rules as any other Australian employment income. Your taxable income for the full financial year is calculated, deductions are subtracted, and progressive marginal rates plus the Medicare levy and any study loan repayments are applied.
- No FIFO tax rate exists — overtime, penalties and allowances are ordinary taxable income.
- Withholding varies by pay period because PAYG treats each pay as if it repeats all year — which is why heavy-overtime swings feel over-taxed and often produce a refund.
- Flights, camp and LAFHA are usually fringe benefits matters for the employer, not deductions you claim.
- Use the ATO's own calculators for estimates, and a registered tax agent for anything specific to you.
This is general information, not tax advice
SprintSuite is a workforce and job management software company, not a tax agent. Nothing here takes your circumstances into account, rates and rules change between financial years, and getting it wrong is expensive. Use the ATO's published rates and calculators at ato.gov.au, or speak to a registered tax agent listed on the Tax Practitioners Board register.
What actually determines your tax
Nine things move the number. Notice that none of them is "because it is FIFO":
Your total taxable income for the year
Australia has progressive marginal tax rates, so tax is calculated on your whole year's taxable income — not on each swing separately. A high-earning swing does not have its own tax rate.
How your pay is structured
Hourly with overtime and penalties, annualised salary, flat all-purpose rate, day rate or casual loading all change your gross income and how evenly it arrives across the year.
Overtime and penalty rates
Overtime, shift loadings, weekend and public holiday penalties are ordinary taxable income. They are taxed the same way as base pay — but a big pay period can be withheld at a higher rate, which is where “I got taxed more this swing” comes from.
Allowances
Some allowances are taxable and shown on your income statement; others may be treated differently depending on what they cover and how your employer reports them. Their treatment affects both withholding and your return.
Living Away From Home Allowance and fringe benefits
LAFHA, employer-provided flights, camp accommodation and meals are usually dealt with under fringe benefits tax rules — paid by the employer, not through your income tax — and can appear as a reportable fringe benefits amount on your income statement.
Deductions you are entitled to claim
Work-related expenses reduce taxable income. What is claimable depends on your circumstances and whether the employer reimbursed you.
Offsets, levies and thresholds
The Medicare levy, private health cover status, HELP or study loan repayments, the tax-free threshold and any offsets you qualify for all affect the final figure.
Whether you are an employee or a contractor
An ABN contractor is responsible for their own tax and often GST and PAYG instalments. That is a materially different calculation from PAYG employment.
Residency for tax purposes
Australian tax residents, foreign residents and working holiday makers are taxed under different rate scales. This is one of the most common sources of wrong estimates.
The order the calculation happens in
Broadly, and simplified:
- Add up all assessable income for the financial year — wages, overtime, penalties, taxable allowances, bonuses, leave payouts and any other income.
- Subtract allowable deductions to get taxable income.
- Apply the marginal tax rate scale for your residency status to that taxable income.
- Add the Medicare levy, and any Medicare levy surcharge that applies to you.
- Add compulsory study or training loan repayments if your income is above the relevant threshold.
- Subtract any tax offsets you are entitled to.
- Compare the result with the PAYG tax already withheld across the year — the difference is your refund or bill.
Because step 7 is a full-year comparison, no single payslip tells you what your tax will be. Current rates, thresholds and levy figures for the relevant financial year are published on the ATO website — always use those rather than a figure quoted in a forum.
Why your payslip changes between swings
Uneven pay periods
PAYG withholding is calculated as if every pay period repeats all year. A swing with heavy overtime is withheld as though you earned that much every fortnight, so more tax comes out and often comes back at tax time.
Roster cycles vs pay cycles
A pay period that captures two swings, or one that captures none, changes the withheld amount even though your annual income is unchanged.
Annualised salaries
A flat salary smooths tax across the year, which is why FIFO workers on the same annual income can see very different fortnightly deductions.
Back pay, bonuses and leave payouts
Lump sums are withheld under specific rules and can look dramatic in one pay.
Study loan thresholds
Crossing a HELP repayment threshold changes withholding part-way through the year.
If your payslip itself is confusing before you get to tax, our guide on how FIFO pay works breaks down structures, penalties and allowances.
Five things people get wrong
- There is no separate “FIFO tax rate” in Australian tax law.
- There is no automatic deduction just because you work away from home.
- The zone tax offset generally depends on your usual place of residence being in a designated zone — working in a remote area while living in a city does not usually qualify you.
- Employer-paid flights and camp are usually a fringe benefit matter, not a deduction you claim.
- A bigger gross does not mean a punitive rate — it means more of your income sits in higher marginal brackets.
Where to actually calculate it
ATO income tax estimator
Estimates tax on your annual taxable income, including the Medicare levy and study loan repayments.
The closest thing to a “FIFO tax calculator” — you supply your annual income.
ATO tax withheld calculator
Estimates how much PAYG should be withheld from a single pay, which explains a specific payslip.
Useful for checking a heavy overtime pay period.
ATO myTax and myDeductions
Lodging your return and recording work expenses through the year.
Records kept during the year make a far bigger difference than any estimate.
A registered tax agent
Advice on your circumstances, including LAFHA, contractor arrangements and residency.
Check registration on the Tax Practitioners Board register.
Records worth keeping through the year
- Income statements and payslips for every employer in the year
- Your roster or swing record, showing days worked and where
- Receipts for work-related expenses you paid yourself
- Records of amounts your employer reimbursed
- Travel and accommodation details where you paid personally
- Any LAFHA declaration or agreement documents
- Details of tools, PPE, licences and training you paid for
- Bank records for income not on a payslip, if you contract
If you are the employer, not the worker
Most tax-time pain for FIFO crews starts upstream, in how hours were recorded. Missing shift records, overtime worked out by hand and allowances applied inconsistently produce payslips nobody can explain and corrections months later. Systems that capture shift hours on site, apply the correct award rules to overtime and penalties, and send approved hours to payroll and to the client invoice remove most of that at the source. See payroll and award interpretation.
Related reading: How does FIFO pay work · What does FIFO mean · What is a FIFO swing · Calculating hours, overtime and breaks.
FIFO tax — FAQs
General information only, current as at September 2026. It does not consider your objectives or circumstances and is not tax, financial or legal advice. Tax rates, thresholds and rules change between financial years — confirm current figures at ato.gov.au or with a registered tax agent before acting.
