Credit-card debt can reduce how much you may be able to borrow for a mortgage in New Zealand, even when repayments have always been made on time. Both the balance and the available credit limit may affect the borrowing amount a lender is prepared to consider.
Many borrowers only discover this when preparing to apply for a home loan. This page explains how lenders may assess credit-card debt and limits, why an unused limit can still matter, and what you can review before applying.
For broader guidance covering personal loans, car finance, student loans and other commitments, read our guide to getting a mortgage with existing debt.
Lenders assess credit-card commitments as part of the complete mortgage application. They may consider:
Angela Downie, Financial Adviser, Platinum Mortgages explains:
“The biggest misunderstanding I see is that borrowers think the bank only looks at the amount currently owing on their credit card. I regularly hear clients say, ‘I’ve only got a small balance and I pay it off every month,’ so they assume it won’t affect their application.
In reality, many lenders assess affordability using the available credit limit rather than today’s balance because they’re considering the potential borrowing available under that facility.
Rather than simply telling clients to reduce their credit-card limits, I like to show them different borrowing scenarios. That way they can make an informed decision about how much borrowing capacity they’re prepared to trade for the convenience of keeping a higher limit.”
Some lenders assess an assumed commitment against the available credit limit rather than relying only on the balance showing today. This is because the unused facility could be drawn after the mortgage is approved. The exact treatment differs between lenders. A high unused limit may materially reduce borrowing capacity with one lender but have a different impact under another lender’s servicing model.
Yes. A credit card can affect borrowing power even when its balance is low or has been cleared.
For example, a borrower may regularly clear a card but still have a large available limit. A lender may include an assumed repayment against that limit when calculating how much income remains available for the proposed mortgage.
This does not mean every credit-card limit must automatically be closed. The useful question is whether lowering an unnecessary limit would materially improve the mortgage calculation without disrupting the borrower’s wider financial position.
Credit-card balances and limits can affect the borrowing figure produced by the lender’s assessment and may also contribute to the borrower’s overall debt position relative to income.
The balance represents money already owing. The limit represents additional credit that remains available. Depending on lender policy, both can influence the assessment.
Reducing a balance may lower the amount owed, while reducing an unnecessary limit may lower the commitment used in the lender’s servicing calculation. The actual benefit should be tested before changes are made.
Possibly. Credit-card debt does not automatically prevent mortgage approval. The outcome depends on:
A small, well-managed card may have limited impact. Several cards, high limits, large balances or missed payments may create a greater concern.
Where missed payments, defaults or other adverse information are the main issue, read our Mortgage With Bad Credit guide.
Here are some practical ways to improve your affordability before applying:
Do not assume that clearing a card is automatically the best use of available savings. Using deposit funds to repay credit-card debt may increase borrowing capacity but weaken the deposit position. The two outcomes should be compared.
Angela Downie says:
“I’ve had clients where reducing or closing their credit-card limits made a significant difference to borrowing capacity, while in other cases it made very little difference because affordability, income or another lending factor was the real issue.
Rather than telling clients what they should do, I compare different scenarios so they can see the likely impact before making a decision.
Every client’s circumstances are different, and I don’t recommend reducing or closing facilities unless it will make a meaningful difference to the overall lending position.”
Credit-card debt may be only one part of the application. Personal loans, car finance, overdrafts, Buy Now Pay Later facilities and student-loan deductions can also reduce borrowing capacity.
If several different commitments are affecting the application, the complete debt position should be assessed rather than looking at the credit card in isolation.
If the main objective is to combine several debts or restructure repayments, use our Debt Consolidation page. Consolidating unsecured debt into a mortgage can extend the repayment period and alter the risk, so the total cost and alternatives need to be assessed separately.
A specialist lender may treat credit-card commitments differently from a main bank. This may create another pathway where the overall application remains suitable but does not fit standard bank policy. Our Non Bank Lending page explains how specialist lending works and when it may be appropriate.
Angela adds:
“When I review recent statements, I’m looking for evidence that the borrower is managing their credit card responsibly. I like to see limits being respected, repayments made on time and balances that are being actively managed rather than relied upon for everyday living expenses.
The behaviours that make me pause are regularly exceeding credit limits, taking cash advances or missing repayments. In those situations, I’d often recommend we pause for a period and work on improving the position before approaching a lender.
My aim is always to put our best foot forward the first time we approach a lender, giving the client the strongest possible chance of approval and avoiding unnecessary declines.”
Platinum Mortgages can review the credit-card balances, limits, repayments, income, other commitments, deposit or equity and proposed mortgage.
We can compare the borrowing position before and after selected limits or balances are reduced, helping determine whether a change would materially improve the application before it is submitted.
It can. Some lenders include an assumed commitment based on the available limit rather than only the current balance.
Not automatically. The benefit depends on the lender’s servicing calculation and your wider financial position. It is better to compare the numbers before closing a useful facility.
It may improve borrowing capacity, particularly if the lender includes a significant assumed commitment against the card. However, using savings to clear debt may also reduce the available deposit or cash reserve.
No. Having a credit-card balance is an existing commitment. Missed payments, defaults or adverse credit information are separate credit-history concerns.
Platinum Mortgages can review your balances, limits, repayments and complete borrowing position before a formal lender application is made.
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Platinum Mortgages New Zealand Limited (FSP752271) is a licensed Financial Advice Provider. Angela Downie (FSP742251) is a registered Financial Adviser who provides financial advice on behalf of Platinum Mortgages New Zealand Limited. Angela has worked in the financial industry since 2006.
We help borrowers understand how credit-card balances and available limits may affect mortgage borrowing capacity, compare the effect of reducing a balance or limit against the wider deposit and cash position, and determine whether a change is likely to materially strengthen the mortgage application before it is submitted.
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