Income Tax Scenarios
Compare different income tax situations to understand how decisions affect your take-home pay and tax position.
Income tax isn't always straightforward. HELP repayment thresholds, the Medicare Levy Surcharge, and various tax offsets all create situations where small changes in income or circumstances can have outsized effects on your tax.
These scenarios help you understand the trade-offs—not just what you owe, but how different choices change that number.
Use the HELP sliders for instant answers
On each income tax scenario you can now toggle HELP repayments and drag a delay slider to see how timing affects the outcome. Planning a pay rise or bonus? Adjust the controls to preview the repayment jump before it arrives.
- Spot the exact income where HELP repayments bite
- Share scenario URLs — your adjustments stay in the link
- Save time explaining thresholds to clients or colleagues
Income tax scenarios
Explore how different tax rules affect your take-home pay. Each scenario explains the trade-offs and links to relevant calculators.
HELP/HECS repayment thresholds
Understand how crossing a HELP repayment threshold affects your take-home pay and why small income increases can reduce what you keep.
Medicare Levy Surcharge vs private health insurance
Compare the cost of paying the MLS versus taking out basic hospital cover. See which option leaves you better off at different income levels.
Low-income tax offset (LITO) eligibility
See how the Low Income Tax Offset phases out as your income increases, and what it means for your effective tax rate.
Working holiday maker tax rates
Compare the flat 15% working holiday maker rate with standard resident tax rates to understand when each applies.
Key concepts
Marginal tax rate
The rate at which your next dollar of income is taxed. Understanding this helps you evaluate decisions like overtime, bonuses, or additional work.
Effective tax rate
Your total tax divided by your total income. This is lower than your marginal rate because lower brackets apply to the first portions of your income.
Tax offsets vs deductions
Deductions reduce your taxable income. Offsets reduce your tax directly. A $1,000 offset saves $1,000 in tax; a $1,000 deduction saves $1,000 × your marginal rate.
Threshold effects
HELP repayments and the Medicare Levy Surcharge have income thresholds. Crossing a threshold can mean a sudden increase in what you owe—worth understanding before it happens.