Student Loan Payoff Booster Calculator

This calculator shows how much faster you clear a New Zealand student loan when you add voluntary extra repayments on top of your standard repayments, and whether it also saves you interest. Most New Zealand based borrowers pay no interest, so extra repayments mainly bring the payoff date forward; borrowers who become overseas based are usually charged interest, so paying extra then also cuts the total interest paid. You enter four figures: your current loan balance, your standard repayment per year, the extra repayment you plan to add each year, and the interest rate, left at zero if you are New Zealand based or set to the current overseas rate if interest applies to you. The calculator projects your loan year by year twice, with the standard repayment only and with the standard plus extra, and returns the years saved, the payoff timeline with and without the extra, and the interest saved where a rate applies. Use it to test different extra repayment amounts and see the effect on your payoff date before committing to a higher automatic payment or a lump sum, especially if you are heading overseas and want to clear the loan before interest starts accruing. This is an estimate for planning purposes only, not financial advice, and it does not allow for future changes to your income or the student loan scheme's rules.

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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.