Example result based on the prefilled values.
Annual Repayment
NZ$3,860.64
Weekly Repayment
NZ$74.24
Years to Pay Off
7.80yrs
Total Repaid
NZ$30,000.00
Continue your plan
Useful next calculations
When to use this calculator
- Before accepting a pay change, bonus, pension contribution, or salary-sacrifice option.
- When you want to compare employed, self-employed, or dividend-based income scenarios.
- When you need a simple take-home estimate before running payroll or filing returns.
- When you are approaching the £100,000 income level and want to understand the personal allowance taper effect.
- When you are planning a salary sacrifice arrangement and need to see the net pay impact before agreeing terms.
A realistic New Zealand planning example
Use these sample inputs as a quick scenario test, then change one variable at a time to compare outcomes.
Loan Balance (NZ$)
NZ$600,000
Annual Income (NZ$)
NZ$70,000
After entering these figures, review annual repayment, weekly repayment 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.
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.
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.
Method & assumptionsAuthoritative sources
This calculator estimates NZ student loan repayments using the 2024/25 IRD compulsory repayment threshold of $22,828 and the 12% repayment rate on income above that threshold. Because NZ-based student loans are completely interest-free, the loan balance divided by the annual compulsory repayment gives a straightforward payoff timeline. The calculator does not model voluntary extra repayments (which would shorten the timeline), income growth over time, or the interest that applies to overseas-based borrowers. For a more detailed projection that includes income growth and overseas interest, see the NZ Student Loan Calculator. This estimator is designed for a quick snapshot of current annual and weekly deductions based on today's income.
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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