Second Job Tax Calculator
Work out the Australian tax payable on income from a second job, taxed at your marginal rate since the tax-free threshold is used at your main job.
Your results
Calculation breakdown
- Second job tax
- Second job tax = tax on (main + second job income) − tax on main job alone
Worked example
With a $60,000 main job and $15,000 second job, the second job's income is taxed at around 34.5c in the dollar since it sits on top of the main income, leaving about $9,825 after tax.
Assumptions
- Assumes the tax-free threshold is claimed only at the main job.
- Excludes HELP debt repayment thresholds, which use combined income.
How this calculator works
Enter your primary job salary and your second job income to see combined tax payable, and the effective rate applied to the second job's earnings since it is generally taxed without the tax-free threshold. It uses resident tax brackets and the Medicare levy across your total income.
Rates sourced from the Australian Taxation Office for the 2026–27 financial year. Last reviewed 01/07/2026.
Frequently asked questions
Why is my second job taxed at a higher rate?
The tax-free threshold is normally claimed at your main employer only, so a second employer withholds tax from the first dollar earned.
Will I get money back if too much tax was withheld?
Possibly, since your combined income is taxed correctly at tax time and any over-withholding from the second job can result in a refund.
Does this include HELP debt repayments?
No, use the HECS/HELP Repayment calculator on this site to see how combined income affects compulsory loan repayments.
Rates and thresholds are configured for the 2026–27 Australian financial year and should be reviewed when government settings change.