How fortnightly pay is calculated
Most Australian employers run payroll on a fortnightly cycle, but salaries are quoted as an annual figure. Your fortnightly take-home pay starts from that annual salary and works downward in three steps:
- Apply income tax. Your annual gross is run through the ATO's PAYG income tax brackets for the financial year, giving annual tax payable.
- Add the Medicare levy and any compulsory HECS/HELP repayment (if your repayment income is above the threshold).
- Divide by 26. The remaining net amount is split evenly across the 26 fortnights in the year.
In practice, employers don't recalculate each fortnight from scratch — they use the ATO's PAYG withholding schedules, which are pre-built tables that achieve the same result. The schedules are calibrated so that 26 fortnightly withholdings add up to the correct annual tax for someone earning that fortnightly amount across the full year.
Worked examples by salary, 2025–2026
These figures use 2025–2026 ATO tax brackets and assume the tax-free threshold is claimed, no HECS debt, and no salary sacrifice. Numbers update automatically each financial year.
Fortnightly vs monthly: the math
A common surprise when moving from a monthly to a fortnightly employer: the fortnightly figure looks lower than half the monthly figure. That's not a payroll error — it's the calendar.
- →12 monthly pay runs × 1 month each ≈ 365 days
- →26 fortnightly pay runs × 14 days each = 364 days
A fortnight is just under half a month, so the fortnightly figure (annual ÷ 26) lands a few percent below half the monthly figure (annual ÷ 12 ÷ 2). Over a full year both totals reconcile to the same annual gross — only the per-cycle slice changes. The one wrinkle: because 26 × 14 days = 364, roughly every 11 years a 27th fortnightly pay day falls inside a single financial year, slightly lifting that year's gross.
How fortnightly pay appears on your payslip
A fortnightly payslip lists the same lines every run: gross pay (annual salary ÷ 26, plus any allowances or overtime), PAYG withheld (income tax + Medicare levy + HECS/HELP via the ATO's fortnightly schedule), any pre-tax deductions such as salary sacrifice, employer super on its own line (it doesn't reduce your take-home), and net pay — the amount that reaches your bank account. For a worked sample payslip and the full Fair Work field requirements, see the payslips guide.
Why your fortnight can change
For a salaried role with no extras, every fortnight should land at the same number. When it doesn't, the usual reasons are:
- HECS/HELP threshold crossed — repayments start once repayment income passes the ATO threshold; the first fortnight after a pay rise can drop noticeably.
- Leave loading — the standard 17.5% annual-leave loading lifts the gross of any fortnight containing leave hours.
- Allowances and overtime — shift loadings, penalty rates, and on-call allowances change the gross, and therefore the PAYG withheld.
- Salary sacrifice changes — starting or stopping pre-tax deductions shifts both taxable gross and net.
- Voluntary extra withholding — extra tax you've asked payroll to hold back reduces net pay by that amount.
- Back payments and bonuses — one-off amounts use the ATO's Schedule 5 method, which usually takes more tax in the affected fortnight.
The bonus tax guide covers the Schedule 5 case in detail, and the HECS/HELP guide covers the threshold-crossing case.
Weekly vs fortnightly vs monthly
Pay-cycle choice usually comes from the employer or industry award, not the employee — but if you have a choice, the practical differences are mostly cash-flow and admin:
| Cycle | Pay runs / year | Best for |
|---|---|---|
| Weekly | 52 | Hourly, casual, and shift work — matches the rostering cycle. |
| Fortnightly | 26 | Most salaried roles in Australia — common for awards and enterprise agreements. |
| Monthly | 12 | Executive, foreign-headquartered, and some professional services roles. |
For budgeting, a fortnightly cycle aligns well with rent and most recurring household bills. For mortgage offset balances, a more frequent cycle (weekly or fortnightly) means money sits in the offset account a few extra days each year.
Frequently asked questions
How is fortnightly take-home pay calculated?
Your annual salary is taxed at the ATO's PAYG income tax brackets, the Medicare levy, and any optional HECS/HELP repayments. The remaining net amount is then divided by 26 — the number of fortnights in a year — to give your fortnightly take-home figure. Most employers follow the ATO's PAYG withholding tables, which apply this same calculation to each fortnight individually.
Why is my fortnightly pay less than half my monthly pay?
There are 26 fortnights in a year but only 12 months, and 12 × 2 = 24, not 26. So a fortnightly figure (annual ÷ 26) is always slightly less than half a monthly figure (annual ÷ 12 ÷ 2). Over a full year both add up to the same total, but your fortnight is shorter than half a month. This catches a lot of people moving from a monthly to a fortnightly employer.
Are there really 26 fortnights in a year?
Yes — most years. A year has 52 weeks plus a day or two, which works out to 26 complete fortnights. Roughly every 11 years, a 27th pay period falls inside the calendar/financial year for fortnightly-paid employees. Employers usually flag this in advance, because it can shift your annual gross slightly above the salary on your contract.
Why is one fortnight smaller than the previous one?
If your fortnightly amount changes between pay runs, the most common causes are: HECS/HELP starting once you cross the income threshold, a salary sacrifice change, an extra day of paid leave (or unpaid leave), a one-off allowance or back payment, or your employer correcting a previous PAYG over-withhold. Salary sacrifice and leave-loading periods are the usual reason a salaried role suddenly shows a different fortnight.
Is fortnightly tax different from weekly or monthly tax?
The annual tax is the same — what changes is the way it's withheld. The ATO publishes a separate PAYG withholding schedule for each cycle (weekly, fortnightly, monthly), each calibrated so that the year's total withholding adds up correctly. If you switch from monthly to fortnightly mid-year, your end-of-year tax position should still resolve at lodgement.
Does fortnightly pay include super?
No. Super is paid on top of your gross salary directly into your super fund and isn't part of your fortnightly take-home. Most payslips show employer super on a separate line so it's clear it doesn't reduce the cash you receive each fortnight.
Does the ATO fortnightly tax table include HECS?
Not in the base table. The ATO publishes a separate study and training support loans schedule for each pay cycle. When you tell your employer you have a HECS/HELP debt on your tax file number declaration, payroll adds the fortnightly loan component from that schedule on top of the standard PAYG withholding.