Refinancing Your Mortgage in NZ — A Step-by-Step Guide

Refinancing your mortgage can be a smart way to save money, access equity, or adjust your loan terms to better suit your changing circumstances. In New Zealand, many homeowners refinance every few years to take advantage of lower interest rates or better features. But it’s not always the right move for everyone.

This step-by-step guide will walk you through the process, explain the key concepts, and help you decide if refinancing is right for you.

What is mortgage refinancing?

Refinancing means paying off your existing home loan with a new loan, usually from a different bank or lender. You can also refinance with your current lender by negotiating a new rate or switching to a different product.

Common reasons to refinance include:

  • Securing a lower interest rate
  • Accessing equity for renovations or investments
  • Consolidating debt (e.g., credit cards or personal loans)
  • Switching from a floating to a fixed rate, or vice versa
  • Shortening or extending your loan term

Step 1: Review your current mortgage

Start by gathering your current loan documents. Note your interest rate, loan term, repayment amount, and any fees or break costs. Look for:

  • Your current interest rate (fixed or floating)
  • The remaining loan balance
  • Any early repayment fees (break costs) if you’re on a fixed rate
  • Your loan term and remaining years

Tip: If you’re on a fixed rate, check when it expires. Breaking a fixed rate early can attract significant break costs, which may outweigh any savings from refinancing.

Step 2: Check your credit score and financial position

Lenders will assess your ability to repay the new loan. Check your credit score through a NZ credit reporting agency like Centrix, Illion, or Equifax. A good credit score improves your chances of approval and may help you secure a better rate.

Also review your income, expenses, and existing debts. Lenders typically use a "test rate" (often higher than your actual rate) to ensure you can afford repayments if rates rise.

Step 3: Research and compare lenders

Shop around. Different lenders offer different rates, fees, and features. Consider:

  • Major banks: ANZ, ASB, BNZ, Kiwibank, Westpac
  • Non-bank lenders: SBS Bank, TSB, Heartland Bank
  • Online lenders: Some offer lower rates but fewer branches

Compare not just the interest rate but also:

  • Annual fees and establishment fees
  • Features like an offset account or revolving credit facility
  • Customer service and online banking quality
  • Flexibility to make extra repayments or redraw

Step 4: Calculate the costs and potential savings

Refinancing isn’t free. Common costs include:

Cost Typical range
Break fees (if fixed rate) $0 – several thousand
Legal fees (discharge and new mortgage) $500 – $1,500
Valuation fee $300 – $800
Application / establishment fee $0 – $1,000 (some lenders waive)

Add up all costs and compare them to the savings from a lower interest rate. For example, if you save $150 per month but pay $2,000 in fees, it will take about 13 months to break even. If you plan to stay in the home longer, refinancing may be worthwhile.

Step 5: Apply for the new loan

Once you’ve chosen a lender, submit your application. You’ll need to provide:

  • Proof of income (pay slips, tax returns)
  • Bank statements (usually 3 months)
  • Details of your current mortgage
  • Property valuation (if required)
  • Identification (passport or driver licence)

The lender will assess your application, run a credit check, and may request a valuation. This process can take 1–3 weeks.

Step 6: Arrange legal and settlement

Your new lender will instruct a lawyer or conveyancer to handle the legal work. They will:

  • Discharge the existing mortgage
  • Register the new mortgage
  • Coordinate with both lenders for settlement

On settlement day, the new lender pays out your old loan, and you begin repayments under the new terms. This usually happens seamlessly without you needing to do anything.

Step 7: Review and adjust your repayments

After refinancing, check your new repayment schedule. Consider:

  • Setting up automatic payments
  • Making extra repayments if your loan allows
  • Using an offset account to reduce interest

Tip: If you’ve consolidated debt, avoid running up new credit card balances. Refinancing only works if you change the habits that created the debt.

Pros and cons of refinancing

Pros Cons
Lower interest rate can save thousands Break fees and legal costs can be high
Access equity for home improvements or investments Extending the loan term may cost more in total interest
Consolidate high-interest debt Credit check may affect your score temporarily
Switch to a loan with better features May need a new valuation if property value has dropped

Key features to look for

When comparing mortgage products, consider these features:

  • Offset account: Links your savings to your loan, reducing interest
  • Revolving credit: Flexible facility for overpayments and redraws
  • Fixed vs floating: Fixed gives certainty; floating offers flexibility
  • Extra repayment allowance: Some loans cap how much you can pay extra
  • Portability: Can you transfer the loan to a new property if you move?

Who should consider refinancing?

  • Homeowners on a higher rate: If your fixed term is ending, compare rates before you roll onto a default rate
  • Borrowers with significant equity: You may access equity for renovations or another property
  • People with high-interest debt: Consolidating into a mortgage can lower repayments
  • Those wanting better features: An offset account or revolving credit can save interest

Verdict

Refinancing can be a powerful tool to lower your mortgage costs or access equity — but it’s not a one-size-fits-all solution. Always crunch the numbers, factor in fees, and consider your long-term plans. If you’re unsure, speak to a mortgage adviser or financial adviser who can help you compare options.