Why pay off your mortgage faster?
The average 30-year mortgage in NZ means you'll pay almost as much in interest as the original loan amount. On a $500,000 loan at 5.50%, you'll pay around $522,000 in interest over 30 years. By accelerating your repayments, you can save a huge portion of that and gain financial freedom years earlier.
Strategy 1: Make extra repayments
Even small extra payments make a big difference over time. Adding just $100 per week to a $500,000 mortgage at 5.50% can save over $150,000 in interest and cut 9+ years off your loan.
Use the mortgage calculator to see how extra repayments change your loan timeline.
Strategy 2: Switch to fortnightly payments
Instead of paying monthly, switch to fortnightly payments of half your monthly amount. Because there are 26 fortnights in a year (vs 12 months), you'll make the equivalent of 13 monthly payments instead of 12. This alone can cut 3–4 years off a 30-year mortgage.
Strategy 3: Use an offset or revolving credit
Put your savings to work by using an offset account or revolving credit facility. Every dollar in these accounts reduces the interest charged on your mortgage.
Strategy 4: Increase payments when rates drop
When interest rates fall and your fixed term rolls over, keep your repayments at the old (higher) level. The difference goes straight to paying down principal, and you won't even notice because you're used to the higher payments.
Strategy 5: Shorten your loan term
When refixing your mortgage, ask your bank to shorten the remaining term. Going from 30 years to 25 years increases repayments slightly but saves a fortune in interest.
Strategy 6: Negotiate a better rate
A lower rate means more of each payment goes to principal. When your fixed term expires, compare rates across all lenders and use the best offer as leverage with your current bank.
How much can you save?
| Strategy | Time Saved | Interest Saved (approx.) |
|---|---|---|
| $50/week extra repayments | 6 years | $100,000 |
| Fortnightly payments | 3–4 years | $60,000 |
| $30,000 offset balance | 2–3 years | $45,000 |
| 0.25% rate reduction | 1–2 years | $26,000 |
Try different scenarios in our mortgage repayment calculator.
Frequently asked questions
How can I pay off my mortgage faster without refinancing?
Make extra repayments directly against your mortgage principal. Switch to fortnightly payments (26 per year instead of 12 monthly) to make an extra payment annually. Use an offset account to reduce interest while maintaining liquidity. Each strategy reduces the total interest paid and shortens your loan term.
What is the benefit of making fortnightly mortgage payments?
Making 26 fortnightly payments (instead of 12 monthly) equals 13 months of payments per year. This extra payment annually directly reduces your principal, saving significant interest. For a $400,000 mortgage, switching to fortnightly could save over $50,000 in total interest and reduce your term by 3–5 years.
Should I put lump sums into my mortgage or invest them instead?
If your mortgage rate is 5.5% and investment returns are uncertain, paying down your mortgage guarantees a "return" equal to your interest rate. However, if you have non-deductible debt and higher-yielding investments, consult a financial adviser. For most homeowners, guaranteed mortgage savings outweigh risky investments.
How much do I need to pay extra each week to pay off my mortgage 5 years earlier?
Depends on your loan amount and term. A $400,000 mortgage at 5.5% over 30 years costs $2,272/month. To finish in 25 years, you'd need roughly $2,600/month. Use our calculator to see exactly how much extra is needed for your situation.
What's the mortgage laddering strategy and how does it accelerate repayment?
Mortgage laddering involves splitting your loan into multiple fixed-rate portions with different expiry dates (e.g., 20% 1-year, 30% 2-year, 50% 3-year). This spreads interest rate risk and lets you refinance portions at competitive rates more frequently, potentially reducing your overall rate and speeding repayment.
Find a lower rate to pay off your mortgage faster
A lower interest rate is one of the easiest ways to accelerate your payoff. Compare current rates from all NZ lenders.