Example result based on the prefilled values.
Annual Repayment
A$2,625.00
Repayment Rate
3.50%
Years to Pay Off
10.00
Total Repaid
A$39,198.11
Weekly Repayment
A$50.48
Continue your plan
Useful next calculations
When to use this calculator
- Before accepting a pay change, bonus, pension contribution, or salary-sacrifice option.
- When you want to compare employed, self-employed, or dividend-based income scenarios.
- When you need a simple take-home estimate before running payroll or filing returns.
- When you are approaching the £100,000 income level and want to understand the personal allowance taper effect.
- When you are planning a salary sacrifice arrangement and need to see the net pay impact before agreeing terms.
A realistic Australia planning example
Use these sample inputs as a quick scenario test, then change one variable at a time to compare outcomes.
Current HECS-HELP Debt (A$)
A$1,400
Annual Repayment Income (A$)
A$80,000
Expected Annual Income Growth (%)
A$80,000
Expected Annual Indexation Rate (%)
5%
After entering these figures, review annual repayment, repayment rate and years to pay off together rather than in isolation — each metric tells a different part of the story. Then rerun the tool with one input adjusted to see which variable has the biggest effect on all three outputs before you settle on a plan.
How to read your results
Annual Repayment
Use this metric to compare scenarios side by side and understand how changes in the key inputs drive the final outcome. If the figure surprises you, isolate one variable at a time and rerun the calculation to identify which assumption is responsible.
Repayment Rate
Use this metric to compare scenarios side by side and understand how changes in the key inputs drive the final outcome. If the figure surprises you, isolate one variable at a time and rerun the calculation to identify which assumption is responsible.
Years to Pay Off
Use this metric to compare scenarios side by side and understand how changes in the key inputs drive the final outcome. If the figure surprises you, isolate one variable at a time and rerun the calculation to identify which assumption is responsible.
Total Repaid
This is the headline outcome of the calculation, but it is most useful when read alongside the supporting metrics below it rather than in isolation. Try changing one input at a time and watching how this total moves to understand which driver has the biggest impact.
Weekly Repayment
Use this metric to compare scenarios side by side and understand how changes in the key inputs drive the final outcome. If the figure surprises you, isolate one variable at a time and rerun the calculation to identify which assumption is responsible.
Method & assumptionsAuthoritative sources
This calculator uses the 2024/25 HECS-HELP compulsory repayment thresholds published by the Australian Taxation Office. There are 19 repayment bands ranging from 1% of repayment income at $54,435 to 10% above $159,664. To project your payoff timeline, the model simulates year-by-year debt reduction: at the start of each year your balance is indexed by the CPI rate you specify, then your repayment (current income multiplied by the applicable rate) is subtracted. Your income then grows by the specified annual growth rate before the next year’s calculation begins. The simulation runs for up to 40 years.
Key limitations: this model uses annual compounding and does not account for voluntary repayments, changes in employment or career breaks, income years where you earn below the threshold, or the possibility of future legislative changes to thresholds and rates. Indexation rates can vary significantly year to year — the 3.9% default is an approximate medium-term average; you should test both lower (2%) and higher (6%+) scenarios. The ATO’s official HELP repayment calculator on the ATO website and the mygov portal provide confirmed figures based on your actual lodged tax data.
Common mistakes
- !Using an assumption that is not supported by a current local quote, bill, statement or official source.
- !Treating a generic estimate as a lender, provider, payroll or tax authority decision.
- !Mixing monthly and annual inputs without converting them consistently.
- !Forgetting location-specific taxes, fees, eligibility rules or payroll deductions where they apply.
- !Testing only one scenario instead of checking how a cautious assumption changes the result.
What to do next
- Run a second scenario with a cautious assumption so you can see the downside clearly.
- Compare the result with the related calculators below before making a decision.
- Check current local rules, eligibility and provider terms before applying or committing money.
- Keep a record of the assumptions so you can update the estimate when a quote, bill or pay figure changes.
- Use the result to prepare better questions for a lender, provider, adviser or employer rather than treating it as a final answer.
Frequently asked
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