Lump Sum Mortgage Payments in NZ: When and How to Do It Right

Making Lump Sums Work for You

Whether it's an inheritance, bonus, or the proceeds from selling something valuable, a lump sum payment can dramatically accelerate your mortgage payoff.

The Math

On a $400,000 mortgage at 6.5%:

• Adding $20,000 today saves approximately $32,000 in interest
• Shaves 3.5 years off a 30-year loan

Timing Matters

1. Apply early in the loan - Interest savings are greatest when your balance is highest
2. Consider the calendar - Some banks apply payments differently depending on timing
3. Check your terms - Ensure lump sums don't trigger early repayment fees

NZ Bank Considerations

• ANZ: Allows extra repayments up to $5,000/year without fee
• BNZ: No fee for lump sums under $10,000
• ASB: Flexible extra repayment options
• Westpac: Check your specific product terms

Strategic Approaches

1. Annual lump sum - Make it a tradition with your annual bonus
2. Keep some cash - Don't deplete emergency fund entirely
3. Consider offset - If available, put lump sum in offset account instead

Warning Signs

• You're taking on high-interest debt to free up cash
• You depletes emergency savings
• You're sacrificing essential expenses

Bottom Line

A lump sum is a powerful tool when used wisely. Run the numbers first, check your terms, and celebrate the progress!