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We're buying our first home with about a 25% deposit, but don't know much about home loans. Is it worth using a mortgage adviser, or should we compare banks ourselves?
For a first-home purchase in New Zealand with a 25% deposit, I'd lean towards using a mortgage adviser and doing some bank comparisons yourself. You don't necessarily need to choose one approach over the other.
A 25% deposit is a solid starting point. It will generally put you in a stronger position than a buyer with a smaller deposit, but the best mortgage isn't necessarily the one with the lowest advertised interest rate. The structure of the loan, fees, flexibility and how well it fits your budget all matter.
The good news is that you don't need to understand every detail of home loans before you start. A good adviser can explain your options, help you understand what banks are looking for, and guide you through the process.
Mortgage adviser vs going directly to banks
Option 1: Use a mortgage adviser
My preferred starting point
They can compare suitable loan options from multiple lenders, help prepare your application, explain the jargon and coordinate the process through to settlement. Mortgage adviceMortgage advisers: What you need to know
Best if: You're first-home buyers, want guidance, or aren't sure how to structure your mortgage.
Watch out: Advisers don't necessarily cover every bank, and many are paid commission by lenders. Ask which lenders they work with and how they're paid.
Option 2: Compare banks yourself
You deal directly with each bank, ask about rates and negotiate based on competing offers. You'll have direct access to each bank's own products.
Best if: You're comfortable researching, have time to negotiate and are happy to manage the application process yourself.
Watch out: Comparing headline interest rates alone can miss differences in fees, loan features and cashback conditions.
Why your 25% deposit matters
A 25% deposit means you're borrowing around 75% of the property's purchase price, before allowing for any other costs. This is generally a good position to be in when approaching lenders.
It may help you access standard lending terms and avoid the low-deposit restrictions that can apply to some borrowers. However, approval and the interest rate offered will still depend on your income, existing debts, expenses, credit history and the property you're buying.
With that deposit, I'd focus on negotiating a competitive overall deal rather than worrying only about whether a bank will lend to you.
What I'd do in your position
- Speak to two mortgage advisers. Have an initial conversation with each, and ask how many lenders they can access. Compare the quality of their explanations, not just their confidence or sales pitch.
- Get a direct quote from your main bank. If you already bank with one of the major New Zealand banks, ask what rate, fees and any cashback it could offer you.
- Compare the full package. Ask for written offers that cover interest rates, fees, loan structure, repayment flexibility and cashback conditions. Mortgage adviceMortgages and home loans
- Choose the option that makes sense for your finances. You don't have to accept the adviser's recommendation or take the first bank offer you receive.
What to ask a mortgage adviser
Here are five useful questions to take to your first meeting:
- Which banks and lenders do you work with, and which don't you cover?
- Are you paid by the bank, by us, or both?
- Do you receive different commissions from different lenders?
- Can you show us at least two suitable options and explain the pros and cons of each?
- Could we owe you a fee if we change banks or repay the loan early?
In New Zealand, you can check an adviser's registration through the Financial Service Providers Register. The Financial Markets Authority also explains what to expect from a mortgage adviser and what they must disclose. Mortgage adviceFinancial advice
One more thing: how to structure your mortgage
When you get to the actual loan, you'll need to decide how much to fix, for how long, and whether some of the loan should remain floating or use an offset or revolving-credit facility. You may also be able to make additional repayments, depending on your loan terms.
Don't feel you need to solve all of that immediately. Ask the adviser to explain the options in plain English, including what happens when a fixed term ends and what it costs to break a fixed rate early.
Let me tailor this to your situation
There's one thing that would help me give you more specific guidance: what stage are you at in buying your first home?
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Captured 11 October 2026