Student Loan Repayment Calculator NZ
Use our student loan calculator to see your exact loan repayments, your estimated debt free year and what happens if you move overseas — calculate instantly using current 2026/27 IRD rates not a rough rule of thumb.
Student Loan Calculator NZ
Estimate your repayments, payoff timeline, and how voluntary extra payments speed things up — using current 2026/27 IRD rates.
NZ-based borrowers
Annual repayment = (Gross income − $24,128) × 12%No interest is charged while you remain NZ-based.
Overseas-based borrowers
Repayment is a fixed amount based on your loan balance, not your income:Balance < $15,000 → $1,500/yr · $15,000–$30,000 → $3,000/yr · $30,000+ → $4,500/yrInterest accrues on the outstanding balance at
5.6% per year (2026/27 rate).
Debt-free year projection
Each future year:Balance = (Balance + Interest) − (Compulsory repayment + Voluntary extra repayment), repeated until the balance reaches $0 (capped at a 40-year projection).
| Year | Repayment | Interest | Balance Remaining |
|---|---|---|---|
| Enter your details above to see your year-by-year projection | |||
How to Use This Calculator
Select whether you’re an NZ-based or overseas-based borrower, enter your gross income (or loan balance, if overseas) and current loan balance, choose your pay frequency, and optionally add a voluntary extra repayment amount. Results update instantly — no need to click a button each time you change a value.
Step-by-step
Choose your borrower type — “NZ-Based Borrower” or “Overseas-Based Borrower,” using the toggle at the top. This determines which repayment rule applies (income-based 12% vs. fixed balance-based obligation).
Enter your gross income — before tax, from your main job. (Not required for the overseas-based calculation, which is driven by loan balance instead.)
Select your pay frequency — weekly, fortnightly, monthly, or annually — to see your repayment broken down the way it actually appears on your payslip.
Enter your current loan balance — check your exact figure in myIR for accuracy.
(Optional) Adjust the voluntary extra repayment slider — see how adding extra annual payments changes your estimated debt-free year.
Read your results — annual repayment, per-pay-period amount, and estimated debt-free year appear immediately, along with a year-by-year balance chart and a full repayment schedule table below.
(Optional) Click “How is this calculated?” — expands a plain-language breakdown of the exact formula behind your results, for anyone who wants to verify the numbers themselves.
How Does the Student Loan Calculator Work?
This calculator applies New Zealand’s actual student loan repayment rules: for NZ-based borrowers, it calculates 12% of your income above the $24,128 threshold; for overseas-based borrowers, it calculates a fixed repayment based on your loan balance plus annual interest. It then projects your balance forward year by year to estimate your debt-free date.
Worked Example
NZ-Based Borrower on $65,000
On a $65,000 salary, income above the $24,128 threshold is $40,872. At 12%, that’s an annual compulsory repayment of $4,904.64 — about $408.72 per month, or $188.64 per fortnight. This is deducted automatically through PAYE once your employer applies the “SL” tax code (e.g., M SL).
| Step | Calculation | Result |
|---|---|---|
| Income above threshold | $65,000 − $24,128 | $40,872 |
| Repayment (12%) | $40,872 × 12% | $4,904.64/year |
| Per month | $4,904.64 ÷ 12 | $408.72 |
| Per fortnight | $4,904.64 ÷ 26 | $188.64 |
Overseas-Based Borrower
If you’re outside New Zealand for more than 184 days (with fewer than 32 days back in NZ within that window), you become an overseas-based borrower (OBB). Your loan stops being interest-free, and your repayment is based on your balance, not your income.
Example: A borrower with a $40,000 loan balance living overseas might have an annual repayment obligation of approximately $3,500–$4,000, plus interest charged on the outstanding balance at the current overseas rate. Unlike NZ-based repayment, this obligation applies even if you have no income at all — it’s a fixed requirement based purely on loan size.
The 32-Day Rule — Are You NZ-Based or Overseas-Based?
You remain an NZ-based borrower (interest-free) as long as you’re physically present in New Zealand for at least 32 days within any rolling 184-day period. Spend 31 days or fewer in NZ during that window, and IRD classifies you as overseas-based — interest starts accruing, backdated to the day you left.
What Happens If My Income Is Below the Threshold?
If your income is at or below $24,128 per year, no compulsory repayments are deducted — your loan balance simply stays as-is (interest-free, if you’re NZ-based) until your income rises above the threshold or you choose to make voluntary payments. Some borrowers on consistently low income never cross the threshold and carry a small, static, interest-free balance for years without issue.
Frequently Asked Questions
How is my NZ student loan repayment calculated? For NZ-based borrowers, it’s 12% of your income above the $24,128 annual threshold, deducted automatically through PAYE. For overseas-based borrowers, it’s a fixed amount based on your loan balance, plus interest on the outstanding balance.
Is the NZ student loan interest-free? Yes, but only while you’re NZ-based — present in New Zealand for at least 32 days in any rolling 184-day period. If you become overseas-based, interest starts accruing on your balance, backdated to your departure date.
How long does it take to pay off a student loan in NZ? It depends entirely on your loan balance and income. A $65,000 salary with a $25,000 balance clears in roughly 5 years through compulsory repayments alone; lower incomes or larger balances take longer. Use the calculator above with your own figures for an accurate estimate.
What is the student loan repayment threshold for 2026/27? $24,128 per year (about $464 per week), unchanged from the 2025/26 tax year. You only repay 12% on income above this amount.
Is it worth making voluntary student loan repayments? For NZ-based borrowers, the loan carries no interest, so voluntary repayments don’t “save” you money the way paying off a mortgage early does — the main consideration is opportunity cost versus other uses for that money. For overseas-based borrowers, where interest is actively charged, voluntary repayments behave more like paying down conventional debt.
What happens to my student loan if I move overseas? If you’re outside NZ for more than 184 days (with fewer than 32 days back in the country), you become an overseas-based borrower. Your loan stops being interest-free, and IRD sets a fixed annual repayment obligation based on your balance rather than your income.
Does having a student loan affect my mortgage application in NZ? Yes. Even though it’s interest-free, your student loan balance counts as a liability in a bank’s lending calculations, which can reduce how much you’re able to borrow for a home.
What tax code do I need for student loan repayments? Use a tax code with “SL” appended (e.g., “M SL” for a standard main job with a student loan) so your employer knows to deduct the extra 12% alongside your regular PAYE.