You may be wondering whether getting a mortgage with existing debt in NZ is possible. In many cases, lenders will still approve borrowers with personal loans, student debt, or credit-card liabilities depending on overall affordability and account conduct.
This guide explains how lenders assess existing debt when reviewing a mortgage application, and what to consider if your debt affects borrowing capacity or approval.
The best option depends entirely on personal circumstances.
When reviewing a mortgage application, the banks look at three things relating to debt:
First, they will deduct any loan payments when calculating your income. Let’s say you have an income of $50,000 per annum after tax. You also have loan repayments totalling $10,000 per annum. The bank will reduce your calculated income to $40,000. Sometimes, if the loan amounts and types show a pattern of high discretionary borrowing, the bank may consider whether the applicant is going to responsibly manage the financial obligations of a mortgage.
When it comes to student debt, the banks are often more focused on the repayment impact than the total student loan balance. This is because the loan repayments are always based on the person’s income, not how much is owed. And student debt is considered ‘good’ in that it likely has improved the person’s earning prospects in the long run. Given that some professions require students to go into debt in the hundreds of thousands, this is a big relief for many prospective homeowners!
It’s important to be aware that the bank doesn’t look at when the term of a loan is up. If you’re a couple of months away from paying off your car loan at the time of applying, the bank won’t take that into account. Instead, they’ll calculate your income as if you are making those loan payments for the foreseeable future. For this reason, it can sometimes be helpful to reduce certain debts earlier. That would mean however that you’re likely to reduce your deposit, so it’s a bit of a balancing act. We can help weigh up whether it is better to reduce a debt before applying, keep more deposit available, or wait until a loan repayment no longer affects servicing. The right move depends on the type of debt, the remaining balance, the repayment amount, your deposit position and the lender being considered.
Liability refers to any credit card or overdraft limits. When it comes to credit cards and overdrafts, the bank doesn’t look at how much you currently owe. Instead, they will calculate your debt using the assumption that you will spend up to your credit card and overdraft limits. A practical review may include checking whether credit-card or overdraft limits are higher than needed, whether unused limits should be reduced before applying, and whether changing limits could affect your borrowing capacity. For more detail, see our guide on Credit Card Debt and Mortgage Affordability.
Finally, lenders may review your credit history. This can include missed payments, defaults, recent credit enquiries, or other past credit events that may affect how your application is assessed. Credit enquiries can also affect your credit profile. Every time you apply for a hire purchase, credit card, personal loan or similar facility, a credit check may be recorded.
If your main concern is missed payments, defaults or adverse credit history, our separate guide on getting a mortgage with bad credit may be more relevant.
It can be frustrating if your mortgage application is delayed or declined because existing debt affects servicing calculations. You may have stable income and manageable repayments, but existing liabilities can still reduce borrowing capacity under bank assessment models. The next step depends on why the application is not working. If the issue is mainly existing debt, the focus may be on reducing limits, paying down certain debts, restructuring repayments, or choosing a lender whose assessment better fits your situation.
If your application has been declined for broader reasons, such as bank policy, income type, credit history or overall lender fit, our Bank Said No service may be more relevant. If the issue is multiple debts and repayment pressure, debt consolidation may also be worth reviewing separately.
Getting a home loan with existing debt in NZ is usually about showing affordability, account conduct and a clear plan. It does not always require a perfect financial position. Some specialist lenders may consider borrowers whose existing debt levels fall outside standard bank servicing models. However, specialist lending can involve higher interest rates, fees and stricter exit planning, so it should be considered carefully.
Where specialist lending is appropriate, the aim should usually be to create a structured pathway toward stronger long-term lending outcomes, including a possible move back to mainstream bank lending later.
| Type of Debt |
Impact |
Comment |
|
Credit Card |
Low to High | Depends on limit, balance and lender assessment |
|
Buy Now Pay Later |
Low to Moderate | May affect spending conduct or affordability |
|
Student Loan |
Usually Low | Repayments are generally income-based |
|
Personal Loan |
Low to High | Depends on balance, repayment and remaining term |
The type of debt matters. Its impact on getting a mortgage with existing debt can vary depending on the lender, the balance, the repayment amount, the limit, and how the overall application is assessed.
Some lenders may still consider borrowers with existing debt where overall affordability and account conduct remain acceptable. Understanding how lenders assess existing debt and borrowing capacity can help clarify which lending pathways may be available.
At Platinum Mortgages, we help borrowers understand how existing debt may affect mortgage approval by reviewing income, repayments, credit limits, account conduct, deposit position and lender fit. Where appropriate, we can explain whether reducing a limit, paying down a debt, waiting for a repayment to finish, considering a different lender, or using a specialist lending pathway may improve the position.
The goal is to help borrowers understand their options clearly and structure lending in a way that supports longer-term financial stability.
Every lending situation is different, and understanding the available options starts with a clear assessment of income, liabilities, and borrowing position. If you would like to discuss your situation further, contact us for a confidential assessment.
Angela is an accredited Financial Adviser, licensed under FSP742251 and has been in the Financial Industry since 2006. Our 5-star Google reviews reflect the excellent customer experience we promise — making your home loan journey positive, stress-free, and rewarding. At Platinum Mortgages, our clients are the reason we exist — so you can be confident every step is guided by genuine care and expertise.
