Student Loans and Mortgages: Do You Have to Pay It Off Before You Buy?

A quick heads-up before we dive in: This article is strictly for general informational purposes and does not constitute financial, legal, or tax advice. Every situation is entirely unique, and bank lending policies change frequently. Before making any decisions about your property journey, it is highly recommended that you seek independent advice from a qualified financial adviser.

If you have spent a few years studying, there is a good chance you have a New Zealand student loan sitting in the background. When you log into your IRD account and see a balance of $30,000 or $40,000, it is completely normal to feel a bit of panic about how a bank will view it.

A very common question we get from first-home buyers is: "Do I need to completely pay off my student loan before a bank will let me buy a house?"

The great news is: Generally speaking, no, you don't.

Having a student loan rarely stops you from getting a mortgage, and you certainly don't need a zero balance to buy your first home. However, it does change how the bank calculates what you can afford on a weekly basis.

Here is a straightforward guide to how banks typically view your student loan, how it impacts your borrowing power, and why using your house deposit to pay it off early might actually be a step backward.

The Big Relief: Banks Usually Don't Fear the Balance

When you apply for a home loan, credit assessors look at your debts to make sure you aren't overcommitted.

If you had a $30,000 credit card debt or a massive personal car loan, the bank would likely be highly concerned. Those types of debt come with high interest rates and strict repayment timelines.

In most cases, your New Zealand student loan is treated quite differently. Assuming you live and work in New Zealand, your student loan is generally interest-free. Because it isn't quietly compounding with massive interest charges every month, banks typically don't view the total overall balance as a severe immediate risk. They usually don't mind if it takes you another 10 years to slowly pay it off.

What the Bank Usually Cares About: Your Take-Home Pay

While banks generally aren't too worried about the total size of your student loan, they do look very closely at the regular repayments coming out of your pay.

In New Zealand, your student loan repayment is typically a fixed percentage (currently 12%) of every dollar you earn over a certain income threshold. For most wage and salary earners, this money is automatically deducted before your pay even hits your bank account.

Think of it this way: if you have $150 per fortnight going towards your student loan, that is $150 that cannot go towards a mortgage payment. Therefore, the bank will generally see this as less income available to support the home loan when they run their affordability calculators.

The simple math: Having a student loan rarely means an automatic "no" from the bank. It usually just means your maximum borrowing capacity might be lower than someone earning the exact same salary who doesn't have a student loan, simply because your actual usable take-home pay is reduced.

The Trap: Should You Use Your Deposit to Pay It Off?

Sometimes, buyers who have saved up a great house deposit consider taking a chunk of those savings to wipe out their student loan completely, thinking a "clean slate" will make the bank happier.

From a mortgage strategy perspective, this is usually not recommended without specialised expert advice for two big reasons:

1. You Might Be Swapping 0% Interest for Mortgage Interest

Your NZ student loan is likely interest-free. If you take $20,000 out of your house deposit to pay it off, you now have to borrow an extra $20,000 from the bank to buy your house. You might effectively be taking an interest-free loan and replacing it with a mortgage that charges you standard market interest rates!

2. Protecting Your Deposit Size

The size of your deposit is incredibly important. If using your savings to pay off your student loan drops your house deposit below the magic 20% mark, the bank might charge you a Low Equity Premium (an extra fee or higher interest rate), and it can become much harder to get your loan approved in the first place. Cash is king when buying a house—it is often best to keep your deposit intact.

The One Exception: The "Tiny Balance" Strategy

There is one common scenario where paying off your student loan early can make sense.

If your student loan balance is getting very low—say, you only have $1,000 or $2,000 left to pay—and you have plenty of savings, wiping it out can be a reasonable move.

By paying off that final tiny balance, the mandatory student loan deductions stop immediately. Suddenly, your usable take-home pay can jump up by a few hundred dollars a month. When the bank updates their calculator with your newly increased take-home pay, your borrowing power could potentially leap up by tens of thousands of dollars. If this is what allows you to reach your property buying goals, then it’s worth considering, with expert guidance along the way.

How Home Loan Factory Can Help

Navigating exactly how much a student loan affects your borrowing power doesn't have to be a guessing game.

At Home Loan Factory, we run these numbers every single day. Before you submit an application—or make any big decisions about paying down debt—we can run your specific income, student loan deductions, and deposit size through our bank calculators. We will show you exactly what your borrowing capacity looks like right now, and help you strategize the smartest, safest way to position your finances for approval.

Wondering how your student loan impacts your property goals? Get in touch with the team at Home Loan Factory today for a friendly, easygoing chat.