This New Zealand calculator shows how making voluntary extra repayments on a student loan changes the time to clear it. You enter your balance, income and any extra repayment, and it projects the payoff timeline, helping borrowers, especially those overseas paying interest, see the benefit of paying more than the minimum.
Most New Zealand based borrowers pay no interest, so set the rate to 0; extra repayments then only bring forward the payoff with no interest saving. Overseas based borrowers are generally charged interest, so enter the current rate. Estimate only, not financial advice.
The calculator projects your loan year by year, adding any interest and subtracting your repayments, once with the standard repayment only and once with the extra added. It counts the years to clear under each and the difference. If interest applies, paying down the balance sooner also reduces the interest charged, which the calculator captures as interest saved.
On a $22,000 balance with $3,000 standard repayments and no interest, the loan clears in about 8 years. Adding $2,000 a year clears it in about 5 years, saving roughly 3 years. If you were overseas and charged interest, the extra repayments would also cut the interest paid.
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