Pay Rise: What to Check Before You Trust the Number

Updated 23 June 2026 · Tax and pay

A Pay Rise Calculator gives a fast answer, but the answer is only as good as what goes in. These are the mistakes we see most often with pay rise calculations in Australia, and how to avoid them.

1. Forgetting the Medicare levy

Most take-home pay estimates that leave out the 2% levy overstate pay by hundreds or thousands of dollars.

2. Using last year’s tax rates

Brackets and offsets change. The Stage 3 changes from 1 July 2024 and further cuts from 1 July 2026 mean older figures can be well off.

3. Treating a deduction as a refund

A $1,000 deduction reduces taxable income by $1,000. The cash benefit is only your marginal rate on that amount.

4. Confusing marginal and average tax rates

Moving into a higher bracket only raises the tax on the dollars above that threshold. Your average rate is always lower than your marginal rate.

5. Overlooking the detail that matters most here

Compare a pay rise with the inflation rate. A rise below inflation is a real pay cut.

How the take-home increase per year changes with pay rise

A common mistake is getting one input slightly wrong. Here is what happens to the take-home increase per year when “Pay rise (%)” is off by up to 20% in either direction, with everything else held steady.

Pay rise (%)	Take-home increase per year
4	$2,176.00
5	$2,720.00
6	$3,264.00

At 4 the result is $2,176.00; at 6 it is $3,264.00. If a small change in this input moves the answer a lot, it is worth double-checking that figure before you rely on the result.

A quick sense check

New salary = salary × (1 + rise ÷ 100). The after-tax increase compares take-home pay at both salaries. With typical inputs the calculator returns take-home increase per year of $2,720.00. If your own result looks wildly different, check that each figure is in the right unit and period (weekly, monthly or yearly) before drawing conclusions.