Aotearoa / Student loan
When would you actually be debt-free?
NZ student loans are interest-free while you’re based here — this projects your payoff date from your income and balance.
Your loan
Your income
We hold the $24,128 threshold fixed for future years and grow your income each year, to project when you’d clear the balance.
Extra repayments
Estimates only, in NZD. Covers NZ-based borrowers on the standard 12% PAYE deduction. Overseas-based borrowers face interest charges and fixed repayments by loan-balance bracket instead — a different regime this tool doesn’t cover. Check myIR or IRD directly for your exact position.
For many New Zealand graduates, a student loan is one of the first major financial commitments they'll have after entering the workforce. The good news is that New Zealand student loans are generally interest-free while you're living in New Zealand, making them very different from most other types of debt.
Instead of worrying about interest charges or rising balances, your repayments are primarily determined by your income. If you earn above the Inland Revenue (IRD) repayment threshold, compulsory repayments are automatically deducted from your salary through PAYE using the SL tax code. As your income grows, your repayments increase, helping you pay off the loan faster.
Our New Zealand Student Loan Repayment Calculator helps you estimate how long it may take to become debt-free. By entering your current loan balance, annual income, expected salary growth, and any voluntary repayments, the calculator projects your future repayments year by year and estimates your expected payoff date.
Whether you've just graduated or have been repaying your student loan for several years, this calculator provides a practical estimate of your repayment journey and helps you plan your finances with greater confidence.
What Is the New Zealand Student Loan Repayment Calculator?
The New Zealand Student Loan Repayment Calculator estimates how long it could take you to repay your student loan based on your current financial situation.
Unlike a basic loan calculator, this tool follows New Zealand's student loan repayment rules by using:
- Your current student loan balance
- Annual income
- IRD repayment threshold
- Compulsory repayment percentage
- Expected annual income growth
- Optional voluntary repayments
The calculator estimates:
- Compulsory annual repayment
- Weekly repayment amount
- Total annual repayments
- Estimated repayment period
- Expected debt-free date
- Interest paid (for NZ-based borrowers)
Because New Zealand-based student loans are generally interest-free, every repayment directly reduces your loan balance.
How Student Loans Work in New Zealand
New Zealand's student loan system is quite different from most other countries.
While many overseas student loans charge interest every day, eligible New Zealand borrowers living in New Zealand generally pay no interest on their student loan.
This means:
- Your balance does not grow because of interest.
- Every compulsory repayment reduces your outstanding balance.
- Making voluntary repayments immediately reduces the amount you owe.
This makes estimating your repayment timeline much more predictable than with traditional personal loans or mortgages.
Why Use This Calculator?
Many borrowers only know how much they currently owe.
Few know:
- When they'll finish repaying their loan.
- How future salary increases affect repayments.
- Whether making voluntary repayments is worthwhile.
- How much they'll repay each year.
This calculator answers those questions by projecting your repayments into the future.
It helps you:
- Estimate your debt-free date.
- Plan your finances.
- Understand compulsory deductions.
- Compare different income scenarios.
- See the impact of voluntary repayments.
How This Calculator Works
The calculator follows four main stages.
- Calculate this year's compulsory repayment.
- Add any voluntary repayments.
- Reduce the loan balance.
- Increase your income for next year and repeat until the balance reaches zero.
Because there is no interest for eligible New Zealand-based borrowers, the calculation is much simpler than a conventional loan projection.
Understanding the Student Loan Repayment Threshold
Student loan repayments do not begin immediately after graduation.
Instead, compulsory repayments only apply once your annual income exceeds the repayment threshold set by Inland Revenue (IRD).
The calculator currently uses:
Annual Repayment Threshold = $24,128
If your annual income is below this amount:
Compulsory Repayment:
$0
If your income exceeds the threshold, repayments are calculated only on the income above the threshold—not your entire salary.
How Compulsory Repayments Are Calculated
Once your income exceeds the repayment threshold, compulsory repayments are calculated using a simple formula.
Step 1
Calculate income above the threshold.
Income Above Threshold = Annual Income − Repayment Threshold
Example:
Annual Income:
$60,000
Threshold:
$24,128
Calculation:
60,000
−24,128
--------
35,872Income above threshold:
$35,872
Step 2
Calculate compulsory repayment.
Formula:
Compulsory Repayment = Income Above Threshold × 12%
Using the previous example:
35,872 × 12%
= $4,305This represents the compulsory annual repayment deducted through PAYE.
Weekly Repayment
The calculator also estimates your average weekly repayment.
Formula:
Weekly Repayment = Annual Repayment ÷ 52
Example:
Annual Repayment:
$4,305
Weekly Repayment:
4,305 ÷ 52
≈ $83/weekThis matches the estimate shown in the calculator results.
Voluntary Extra Repayments
Some borrowers choose to make additional repayments beyond the compulsory deductions.
The calculator includes an optional field allowing you to enter voluntary repayments made each year.
These extra repayments:
- Reduce your loan balance faster.
- Shorten your repayment period.
- Bring forward your debt-free date.
Because eligible New Zealand student loans are generally interest-free, every voluntary dollar goes directly toward reducing your outstanding balance.
Projecting Future Repayments
The calculator doesn't stop after estimating this year's repayment.
Instead, it projects your repayments year by year until the entire loan has been repaid.
Each year it:
- Calculates your compulsory repayment.
- Adds voluntary repayments.
- Reduces your remaining balance.
- Increases your salary using your chosen annual growth rate.
- Repeats the process for the next year.
As your salary increases, your compulsory repayments generally become larger, allowing the remaining balance to reduce more quickly over time.
Example Using the Calculator
Suppose you enter:
| Input | Value |
|---|---|
| Student Loan Balance | $20,000 |
| Annual Income | $60,000 |
| Income Growth | 3% |
| Voluntary Repayment | $0 |
The calculator estimates:
- Income above threshold: $35,872
- Annual compulsory repayment: $4,305
- Weekly repayment: $83
- Estimated payoff period: 4 years 3 months
- Estimated debt-free date: 17 November 2030
- Interest paid: $0
Because the loan is interest-free while you're NZ-based, every repayment directly reduces the outstanding balance, making the repayment timeline easier to predict.
Year-by-Year Repayment Projection
Unlike a mortgage or personal loan, an interest-free New Zealand student loan follows a much simpler repayment path.
After calculating your compulsory repayment for the current year, the calculator repeats the same process every year until the loan balance reaches zero.
Each year it performs the following steps:
- Calculate your annual compulsory repayment based on your income.
- Add any voluntary extra repayments.
- Subtract the total repayment from your remaining student loan balance.
- Increase your income using your chosen annual salary growth rate.
- Repeat the calculation for the following year.
Because your salary is assumed to increase over time, your compulsory repayments generally become larger each year, allowing the remaining balance to reduce more quickly.
How Income Growth Affects Repayments
The calculator allows you to enter an expected annual income growth percentage.
This doesn't change the repayment rules—it simply estimates that your salary will increase over time.
Formula
Next Year's Income = Current Income × (1 + Annual Growth Rate)
Example
Current Salary:
$60,000
Annual Growth:
3%
Next Year's Salary:
60,000 × 1.03
= $61,800Because compulsory repayments are based on income above the repayment threshold, a higher salary generally results in larger repayments and a shorter repayment period.
Final-Year Repayment
The final repayment year is usually shorter than a full calendar year.
If your remaining balance is smaller than your annual repayment amount, the calculator estimates exactly what fraction of the year is required to clear the loan.
Formula
Fraction of Final Year = Remaining Loan Balance ÷ Annual Repayment
This is why the calculator may display results such as:
- 4 years 3 months
- 6 years 7 months
- 8 years 1 month
instead of simply rounding to the nearest whole year.
This provides a more accurate estimate of your expected debt-free date.
Why Interest Paid Is $0
One of the biggest advantages of New Zealand's student loan scheme is that eligible borrowers living in New Zealand generally pay no interest on their student loan.
That means:
- No monthly interest charges.
- No compounding interest.
- No repayment is lost to interest.
Every dollar you repay reduces your outstanding balance.
For example:
Annual Repayment:
$4,305
Interest Charged:
$0
Balance Reduction:
Annual Repayment
$4,305
↓
Student Loan Balance
Reduced by $4,305This makes student loans significantly easier to repay than most other forms of borrowing.
Overseas Borrowers
The calculator is designed for New Zealand-based borrowers.
If you move overseas for an extended period, different repayment rules may apply.
Depending on your circumstances:
- Interest may begin accruing on your student loan.
- Compulsory repayments may no longer be calculated as a percentage of your income.
- Fixed repayment obligations may apply instead.
Because these rules differ significantly from the standard NZ-based repayment system, they are not included in this calculator.
If you are living overseas or planning to move overseas, you should check your obligations directly with Inland Revenue (IRD) through myIR or seek professional advice.
Complete Worked Example
Using the values shown in the calculator:
| Input | Value |
|---|---|
| Student Loan Balance | $20,000 |
| Annual Income | $60,000 |
| Income Growth | 3% |
| Voluntary Repayment | $0 |
Step 1
Income above threshold:
60,000
−24,128
--------
35,872Step 2
Compulsory repayment:
35,872 × 12%
= $4,305Step 3
Reduce the loan balance.
Year One:
20,000
−4,305
--------
15,695Step 4
Increase salary.
60,000 × 1.03
= $61,800The calculator repeats the repayment calculation using the higher salary.
Each year:
- Income increases.
- Repayments increase.
- Remaining balance falls faster.
Eventually, the calculator estimates:
- Estimated repayment period: 4 years 3 months
- Estimated debt-free date: 17 November 2030
- Interest paid: $0
How to Repay Your Student Loan Faster
If you'd like to become debt-free sooner, there are several ways to reduce your repayment period.
Increase Your Income
Because compulsory repayments are based on your income above the repayment threshold, higher earnings generally lead to larger repayments and a faster payoff.
Make Voluntary Repayments
Additional voluntary repayments reduce your outstanding balance immediately.
Since eligible NZ-based student loans are interest-free, every extra dollar goes directly toward reducing the loan.
Avoid Missing PAYE Deductions
Ensure the correct SL tax code is applied by your employer so compulsory repayments are deducted accurately.
Keep Your Contact Details Updated
Maintaining up-to-date information with Inland Revenue helps ensure your repayment obligations are calculated correctly and you receive important notifications.
Common Mistakes Borrowers Make
Many borrowers misunderstand how New Zealand student loan repayments work.
Some common mistakes include:
Assuming Repayments Apply to Your Entire Salary
Only the portion of your income above the repayment threshold is used to calculate compulsory repayments.
Confusing Student Loans with Personal Loans
Unlike most consumer debt, eligible NZ-based student loans are generally interest-free.
Forgetting Salary Growth
As your salary increases, compulsory repayments generally increase too, shortening your repayment period.
Ignoring Voluntary Repayments
Even relatively small additional repayments can reduce the time needed to clear your balance.
Using Overseas Rules
This calculator is designed for borrowers who remain based in New Zealand.
Different repayment rules apply if you move overseas.
Benefits of Using This Calculator
The New Zealand Student Loan Repayment Calculator helps you:
- Estimate your compulsory repayments.
- Calculate your weekly repayment.
- Estimate your debt-free date.
- Project repayments year by year.
- Understand how salary growth affects repayments.
- Compare different repayment scenarios.
- See the impact of voluntary repayments.
- Plan your finances with greater confidence.
What This Calculator Doesn't Include
Although the calculator provides a realistic estimate, it does not include every possible situation.
It does not account for:
- Overseas borrower repayment rules.
- Interest charged while living overseas.
- Changes to future repayment thresholds.
- Future legislative changes.
- Self-employed repayment arrangements.
- Employer payroll errors.
- Penalties or overdue repayments.
- Individual IRD account adjustments.
Use the calculator as a planning tool rather than an official repayment schedule.
Frequently Asked Questions
Are New Zealand student loans interest-free?
Yes. Eligible borrowers who remain based in New Zealand generally do not pay interest on their student loans.
When do repayments start?
Compulsory repayments begin once your annual income exceeds the IRD repayment threshold.
What is the repayment rate?
The calculator currently uses the standard 12% repayment rate on income above the repayment threshold.
Are repayments deducted automatically?
Yes. For most employees, compulsory repayments are deducted through PAYE when the correct SL tax code is used.
Can I make extra repayments?
Yes. Voluntary repayments can be made at any time and reduce your outstanding loan balance.
Does paying extra save interest?
For NZ-based borrowers, there is generally no interest to save. Extra repayments simply reduce your balance and shorten the repayment period.
What happens if I move overseas?
Different repayment and interest rules may apply. Check your obligations with Inland Revenue before leaving New Zealand.
Does salary growth affect repayments?
Yes. As your income increases, compulsory repayments generally increase because more of your income sits above the repayment threshold.
Is this calculator an official IRD repayment schedule?
No. It provides an estimate based on the information you enter and current repayment rules.
Should I rely solely on this estimate?
No. Always confirm your actual repayment obligations through Inland Revenue (IRD) or your myIR account.
Final Thoughts
New Zealand's student loan system is designed to make higher education more accessible, and its interest-free policy for eligible NZ-based borrowers makes repayment far more predictable than most other forms of debt. By estimating your compulsory repayments, accounting for expected income growth, and projecting your repayment timeline year by year, the New Zealand Student Loan Repayment Calculator gives you a clear picture of when you could become debt-free.
Whether you're just starting your career or already making repayments, this calculator can help you understand how your income affects your loan, explore the impact of voluntary repayments, and plan your financial future with greater confidence.