Example result based on the prefilled values.
Annual Repayment
NZ$4,460.64
Weekly Repayment
NZ$85.78
Years to Pay Off
6.00
Total Repaid
NZ$30,136.39
Interest Rate
0.00%
Continue your plan
Useful next calculations
When to use this calculator
- Before accepting a pay change, bonus, pension contribution, or salary-sacrifice option.
- When you want to compare employed, self-employed, or dividend-based income scenarios.
- When you need a simple take-home estimate before running payroll or filing returns.
- When you are approaching the £100,000 income level and want to understand the personal allowance taper effect.
- When you are planning a salary sacrifice arrangement and need to see the net pay impact before agreeing terms.
A realistic New Zealand planning example
Use these sample inputs as a quick scenario test, then change one variable at a time to compare outcomes.
Current Loan Balance (NZ$)
NZ$600,000
Annual Income (NZ$)
NZ$70,000
Expected Annual Income Growth (%)
NZ$70,000
Based Overseas?
No — NZ based (interest-free)
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.
Interest 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.
Method & assumptionsAuthoritative sources
New Zealand student loans are administered by Inland Revenue (IRD) and are unique internationally because they carry zero interest for borrowers who remain in New Zealand. Compulsory repayments are triggered once your before-tax income exceeds the annual threshold — set at $22,828 for the 2024/25 year — at which point 12 cents per dollar above that threshold is deducted through PAYE or included in your income tax assessment. This calculator uses those exact IRD parameters to estimate your annual and weekly deduction at your current income, then projects year-by-year repayments forward, factoring in your expected income growth, to show the total years until your balance reaches zero and the total amount repaid over that period.
If you are an overseas-based borrower, IRD charges interest at 3.5% per annum on your outstanding balance and sets a fixed repayment obligation rather than an income-based one. This calculator models that scenario by applying the 3.5% interest charge to each year’s opening balance before subtracting repayments, so you can compare the cost of living abroad versus returning to New Zealand where the interest-free benefit resumes immediately. For official figures, repayment schedules, and to set up or adjust your repayment deduction code, visit ird.govt.nz/student-loans.
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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