interest.co.nz

Eligibility and documents for a home loan

interest.co.nz does not assess mortgage applications. The chosen lender considers your income, expenses, existing debts, credit history, deposit or equity, and the property offered as security. Its lending criteria determine whether you qualify and which rates are available.

Prepare identification, evidence of income and your deposit, account statements, debt details and relevant property information. BNZ’s application checklist illustrates the documents a lender may request; other providers’ requirements differ.

A special rate may depend on your loan-to-value ratio, meaning the loan as a percentage of the property’s value. A smaller deposit can mean additional costs. Check the conditions attached to each offer rather than assuming the lowest displayed rate applies.

Who should use interest.co.nz?

The website is useful for checking how an existing offer compares with advertised home loan options. First-home buyers can explore repayment scenarios, while existing borrowers can investigate refixing or refinancing.

If you need help with variable income, limited equity, credit problems or choosing a mortgage structure, speak to a lender or mortgage adviser. Comparing rates alone will not establish which provider can accommodate your circumstances.

How to compare mortgages and apply

From comparison to a lender quotation

1. Open the mortgage comparison tables and compare equivalent products, including their standard or special-rate conditions.
2. Use the home loan comparison calculator to explore costs and incentives. Keep the borrowing amount and repayment term consistent between offers.
3. Confirm current pricing with shortlisted lenders, then apply through their available channels or a mortgage adviser. Review the personalised disclosure and agreement before accepting.

The calculator estimates an effective annual rate after the costs and incentives entered. That estimate is not a lender-issued APR or approval.

Approval and settlement timing

There is no interest.co.nz approval timetable. Ask the lender about assessment time, outstanding conditions, offer expiry and settlement arrangements.

Questions to ask before accepting a mortgage

• Do I qualify for the advertised rate, and does the offer require a particular equity level, loan size or banking arrangement?
• How long is the rate fixed, when does the offer expire, and what happens when the fixed period ends?
• What fees, insurance premiums and property-related costs must I pay upfront or add to the loan?
• What extra repayments are allowed, and what break costs or cashback repayment could apply if I sell, refinance or repay early?
• What will I owe at the end of the comparison period, and are lower repayments being achieved by extending the mortgage?

Advantages and limitations of interest.co.nz

Advantages

• Several providers in one place: The tables make differences between advertised mortgage rates easier to identify.
• Comparison beyond the headline rate: Calculators help explore repayments, costs, incentives and potential break fees.
• Free public resources: You can research options before approaching a lender.

Limitations

• Indicative pricing: Tables do not establish your eligibility or the terms a lender will offer you.
• Different products appear together: Special-purpose lending and conditional offers need separate scrutiny before comparison.
• Incentives need rechecking: The cashback and incentives page displays an update date of 22 December 2025. Do not treat those entries as confirmed current offers.

Mortgage rates, fees and total borrowing cost

interest.co.nz has no mortgage fee schedule of its own. For each shortlisted lender, obtain the applicable interest rate, establishment and account fees, any low-equity charge, and legal or valuation costs. When refinancing, include discharge costs, possible fixed-rate break charges and any cashback you must repay.

Confirm required house insurance separately from optional life or mortgage repayment cover. For optional cover, check premiums, exclusions, waiting periods and benefit limits. Lender’s mortgage insurance protects the lender; it does not remove your obligation to repay.

A fixed-rate period is different from the full repayment term. Compare offers over the same period and check the remaining balance, especially if a refinance would restart a longer mortgage.

Illustration: a lower repayment can cost more overall

For an illustrative NZ$500,000 principal-and-interest mortgage at an assumed 6% p.a.:

• 25 years: Approximately NZ$3,221.51 monthly, NZ$966,452 repaid in total and NZ$466,452 in interest.
• 30 years: Approximately NZ$2,997.75 monthly, NZ$1,079,191 repaid in total and NZ$579,191 in interest.

Extending the term reduces the monthly payment by about NZ$224 but adds about NZ$112,739 in interest. These are original calculations using monthly repayments and an unchanged rate throughout, excluding fees, insurance and incentives. Totals use unrounded repayments. Actual rates and costs may change; this is not an interest.co.nz or lender offer.

Our assessment of interest.co.nz for home loans

interest.co.nz’s strongest feature is bringing mortgage rate tables and comparison tools together. Its main limitation is the gap between advertised pricing and an offer you qualify for. Use it to shortlist options, then compare written quotations on the same borrowing amount, repayment term, costs and flexibility.

interest.co.nz home loan comparison FAQs

Can interest.co.nz arrange a mortgage or negotiate a rate for me?

No. interest.co.nz publishes financial information and comparison tools; you arrange borrowing through a lender or mortgage adviser. Its tables help you identify offers worth investigating, but they do not match your finances to a lender’s criteria. If using an adviser, ask which lenders they cover, which they exclude and whether you could owe an advice fee.

Why might I not qualify for the lowest mortgage rate shown?

The mortgage tables include standard rates, conditional specials and products for particular purposes, such as energy improvements. A low rate may apply only to eligible additional borrowing rather than your entire mortgage. For ordinary home loans, check the required equity, property type and any banking conditions. Compare rates available for your circumstances, including any low-equity charges.

Can I get a better offer than the rate listed on interest.co.nz?

Possibly. Published rates are a starting point, and Sorted recommends negotiating with lenders. Ask shortlisted providers for written offers covering the same loan amount, repayment term and fixed-rate period. Then ask your existing lender what it can offer to retain your mortgage. A slightly higher rate could still cost less if staying avoids substantial switching costs; a negotiated discount is not assured.

How do I compare a cashback offer with a lower interest rate?

Compare interest and fees over the same period, then account for the cashback you would receive and any existing incentive you must repay. interest.co.nz’s comparison calculator estimates how entered costs and incentives affect an offer’s effective annual rate. Check the cashback repayment conditions separately from the fixed-rate expiry: reaching the end of a fixed period does not, by itself, establish that you can leave without repaying an incentive.

Does a lower monthly repayment mean refinancing will save me money?

No. The reduction may come from extending the repayment term, which can increase total interest even if the rate falls. Request a comparison using your existing remaining term first. Include legal, valuation, discharge and break costs where applicable, plus any cashback repayment. Compare the projected balance as well as payments at the end of the same period: a smaller monthly bill can leave you owing more.

Why could a lender decline me when the calculator repayments look affordable?

A repayment calculator models the figures entered; it does not assess your application. Lenders also consider income, expenses, debts, credit history and the property. They may assess affordability at a higher interest rate than the advertised offer. interest.co.nz publishes mortgage serviceability test rates, meaning rates used to assess repayment capacity. These are only one part of the assessment, so the lender advertising the lowest rate may not approve the largest loan.

Which mortgage features matter if I expect to make extra repayments?

Compare each lender’s allowance for increased regular payments and lump sums, including how the allowance is calculated and when it resets. Fixed loans can involve charges for repayments outside the agreed conditions. Ask whether a fixed-and-floating split would accommodate your expected extra payments, and compare its additional interest cost with the flexibility gained. The Banking Ombudsman explains early repayment charges; future break costs cannot be established from today’s headline rate alone.

Could an offset mortgage cost less despite having a higher advertised rate?

Yes, depending on your savings and the lender’s terms. An offset mortgage calculates interest after subtracting eligible linked account balances from the loan balance. BNZ’s explanation shows why this can reduce interest despite a higher floating rate. Compare using the savings balance you expect to maintain, account for any deposit interest forgone, and check eligible accounts and fees. Withdrawing savings reduces the offset benefit.

What should I do if a lender quotes a different rate from interest.co.nz?

Ask whether the difference reflects a rate change, your equity, the product selected or another offer condition. interest.co.nz’s terms describe its rates as indicative, so a table entry does not secure that price. Obtain written confirmation of the offered rate, its expiry and any conditions for holding it until settlement. Report an apparent listing error through the official contact page, including the lender, product and date observed.

Should I refinance if I am already struggling with mortgage repayments?

Refinancing requires a fresh lending assessment, and lower repayments may involve a longer term or added costs. Contact your current lender about repayment support or hardship options while exploring alternatives. Ask how each option changes interest, fees and your repayment date. For unresolved complaints, use the lender’s complaints process and its independent dispute resolution scheme. A free financial mentor can help assess the wider budget.