How a Salary Estimator Helps You Understand Gross Pay, Super, and Tax
Learn how a salary estimator works with gross pay, superannuation, and tax. Use official tools from the ATO and Fair Work Ombudsman to estimate your take-home pay.
A salary estimator uses your net pay or gross pay to give a rough figure; the national full‑time adult ordinary‑time earnings index is 100 ($108,352 annualised), so a $100,000 gross salary sits at index 92.3.
What is a salary estimator?
A salary estimator is a tool that helps you work out one side of your pay when you only know the other. You might know your take‑home (net) pay but need to figure out your gross pay before tax. Or you might have a gross salary offer and want to estimate what lands in your bank account each week. In Australia, the two most authoritative salary estimators come from the Australian Taxation Office (ATO) and the Fair Work Ombudsman.
This post explains how those estimators work, especially when you’re looking at gross pay, super, and tax — the three big numbers that shape your real income.
How the ATO gross pay estimator works
The ATO’s gross pay estimator is designed for people who don’t have a payslip or payment summary. You enter your net pay for a weekly, fortnightly, or monthly period, plus your residency status and any voluntary agreement instalment rate. The calculator then estimates your gross pay and the amount of tax withheld.
It’s a useful tool if you’re a contractor or casual worker who only knows what hits your bank account. But it has limits. You can’t use it if you have a PAYG withholding variation, pre‑tax deductions (like salary‑sacrificed super or charity donations), or post‑tax deductions (union fees, personal super contributions). It also can’t handle lump sums like bonuses or back pay.
For a more complete picture of your annual tax, the ATO offers an income tax estimator that accounts for the tax‑free threshold, the Medicare levy, and offsets.
Fair Work Ombudsman’s P.A.C.T calculator
The Fair Work Ombudsman’s P.A.C.T (Pay and Conditions Tool) is the go‑to for anyone covered by a modern award or the national minimum wage. It calculates minimum pay including penalty rates, allowances, and overtime. You select your award, classification, and hours, and it gives you a gross pay figure.
A key caveat: the tool says it “cannot guarantee or accept any liability for the accuracy, reliability, currency or completeness of the information.” The official award text always overrides the calculator. Still, it’s the best free estimator for award‑based workers.
Where super fits in
Superannuation is not included in the ATO or Fair Work estimators because it’s paid on top of your gross salary (unless you salary sacrifice). From 1 July 2026, the super guarantee rate is 12% of your ordinary time earnings, up to a maximum contribution base of $270,830. That means if your gross salary is $100,000, your employer must pay an extra $12,000 into your super fund. Your total employment cost is $112,000, but your take‑home pay is calculated only on the $100,000.
If you use a salary estimator to work out your gross pay from net pay, remember that super is separate. The estimator won’t show it. To see your full remuneration, add 12% to the gross figure.
Tax and take‑home pay
Once you have a gross salary estimate, you can approximate your take‑home pay using the 2026–27 resident tax rates (excluding Medicare):
- $0 – $18,200: nil
- $18,201 – $45,000: 15% of excess over $18,200
- $45,001 – $135,000: $4,020 plus 30% of excess over $45,000
- $135,001 – $190,000: $31,020 plus 37% of excess over $135,000
- $190,001+: $51,370 plus 45% of excess over $190,000
Add the Medicare levy of 2% on taxable income (with reductions for low incomes). This ignores HELP debts, salary sacrifice, and the Medicare levy surcharge, so it’s a rough guide.
For example, a gross salary of $100,000 gives a tax estimate of $24,967 (including Medicare), leaving about $75,033 take‑home per year, or $1,443 per week. That weekly figure is close to the ABS median employee earnings of $1,436 (May 2025).
How the Salary Index helps
The Salary Index benchmarks any gross annual salary against the national line of full‑time adult ordinary‑time earnings. As of May 2026, that line is $108,352 per year (index 100). A $100,000 salary has an index of 92.3 — slightly below the national average. The national minimum wage of $52,255 annualised sits at index 48.2.
You can compare your salary across states and industries. For instance, the Mining industry index is 154.7, while Retail trade is 75.9. If you’re in professional services (index 114.7), your pay is likely above the national line.
Using a salary estimator in practice
Let’s say you’re a casual retail worker earning $33.05 per hour (the national minimum wage plus 25% casual loading). You work 30 hours a week. Your gross weekly pay is $991.50. Using the ATO estimator, you could check if your net pay matches. Or use Fair Work’s P.A.C.T to confirm you’re getting the correct award rate.
If you’re a full‑time professional on a $120,000 salary, your index is 110.8 — above the national line. After tax and Medicare, your weekly take‑home is roughly $1,670. Your employer pays $14,400 in super on top.
Caveats to remember
No salary estimator is perfect. The ATO’s tool explicitly says “you should use these results as an estimate and for guidance purposes only.” Fair Work’s tool warns of possible delays in updating award changes. Always cross‑check with your payslip, award, or a qualified adviser.
For more detailed guidance, see our pay guides or how the index works.
Questions people ask
How accurate is a salary estimator?
A salary estimator gives a rough figure based on the information you provide. The ATO’s gross pay estimator is accurate for simple situations without withholding variations or pre‑tax deductions. For award‑based pay, the Fair Work Ombudsman’s P.A.C.T tool is more reliable but may not reflect the latest award changes. Always verify with your payslip or employer.
What’s the difference between gross pay and net pay in a salary estimator?
Gross pay is your income before any deductions (tax, super, etc.). Net pay (take‑home) is what you receive after tax and other deductions. A salary estimator can work either way: you enter net pay to estimate gross, or vice versa. The ATO estimator uses net pay to estimate gross, while Fair Work’s tool calculates award pay including penalties and allowances.
Does a salary estimator include superannuation?
Most salary estimators do not include superannuation because super is paid on top of your gross salary (unless you salary sacrifice). The ATO estimator focuses on income tax withholding, not super. To estimate total employment cost including super, add 12% (the current super guarantee rate) to your gross salary. For example, a $100,000 gross salary costs the employer $112,000 including super.