Does a Credit Card Affect Your Home Loan If the Balance Is Zero?

Yes. A credit card can reduce your home loan borrowing capacity even when its outstanding balance is zero.

That's because lenders generally assess credit cards using their approved limits rather than simply the amount currently owing.

If your card has a $20,000 limit, you have access to $20,000 of credit. Even if you have never used the full amount, the lender needs to consider your ability to repay that debt alongside the proposed mortgage.

Think about it from the lender's perspective.

You might have a zero balance when your home loan is approved. But there is nothing necessarily stopping you from using the available credit after settlement.

That distinction is why paying off a credit card and closing a credit card can produce different results in a mortgage assessment.

How Much Can a $20,000 Credit Card Reduce Your Borrowing Capacity?

Let's look at the numbers.

APRA's residential mortgage lending guidance gives an example of assessing revolving credit using a monthly repayment equivalent to 3% of the total approved limit.

Using that illustrative approach:

Source: APRA Prudential Practice Guide APG 223. The 3% calculation is an illustrative assessment method, not a universal rule applied identically by every lender.

Does that mean closing the cards automatically increases their borrowing capacity by a particular dollar amount? No.

The result depends on their income, existing commitments, living expenses, the proposed loan and the lender's assessment methodology.

But for a household already approaching its borrowing limit, the difference could be significant.

Should You Close Your Credit Card or Just Reduce the Limit?

You don't necessarily need to close every credit card to improve your borrowing position.

Suppose you have a $20,000 card but rarely spend more than $2,000 on it.

You might be able to reduce the limit to $5,000 and retain the convenience of the card.

Using the same illustrative 3% assessment:

Reducing the limit from $20,000 to $5,000 could therefore remove $450 from the illustrative monthly liability calculation.

For some borrowers, that may be enough to achieve the desired borrowing position without closing the account.

For others, removing the facility entirely may produce a better result.

There is little point giving up a facility you genuinely use if the reduction makes no material difference to your borrowing outcome.

Equally, keeping a large unused limit simply because you've had the card for years may not make sense when you're trying to maximise borrowing capacity.

Will Closing a Credit Card Hurt Your Credit Score?

This is one of the biggest concerns borrowers raise.

Closing a credit card does not automatically improve or damage your credit score.

Your credit score reflects several aspects of your credit history, including repayment behaviour, credit applications and the information recorded about your existing and previous accounts.

Reducing your available credit may have a positive effect in some circumstances, but the outcome is not guaranteed.

Credit Score and Borrowing Capacity Are Different

Your credit score is one indicator of creditworthiness.

Your borrowing capacity is an assessment of how much debt a lender believes you can afford to repay.

You could have an excellent credit score and still have your borrowing capacity reduced by substantial unused credit limits.

Similarly, closing a card may improve the serviceability calculation without producing an immediate improvement in your credit score.

These are two different assessments, and borrowers should not confuse them.

How Long Before Applying for a Home Loan Should You Close Your Credit Card?

Ideally, review your credit cards before lodging the application rather than waiting until the lender identifies a problem.

Closing an account involves more than paying the balance to zero.

You need to formally request cancellation, account for any pending transactions or fees and obtain confirmation that the facility has been closed.

Your credit report may not update immediately.

Credit providers follow different reporting processes, and the timing of an account closure appearing on your report can vary.

However, this does not necessarily mean you must wait for the account to disappear from your credit report before applying.

Some lenders may accept satisfactory evidence that the facility has been closed or its limit reduced, even if the credit report has not yet been updated.

Other lenders may have different documentation requirements.

If you are planning to purchase at auction, have already signed a contract or are working toward a settlement deadline, leaving this decision until the last minute can create unnecessary complications.

For more information about formally cancelling a card, see ASIC MoneySmart's credit card cancellation guide.

What If You Want to Keep Your Credit Card?

There are legitimate reasons to keep a card.

You may use it for work expenses, travel, rewards, recurring payments or managing household cash flow.

You may also have a card linked to a banking package, although the specific package benefits and conditions should be checked before making changes.

The question is whether the value of keeping the facility outweighs its effect on your borrowing capacity.

Borrower A

Borrower A earns a strong income, has relatively low expenses and is seeking a modest mortgage.

Their $5,000 credit card limit may make little practical difference to the loan amount they need.

Borrower B

Borrower B is a first home buyer whose borrowing capacity is already close to the property's purchase price.

Their unused $20,000 credit card limit could become a much more important consideration.

The same credit card decision can produce different practical outcomes depending on the borrower.

That's why automatically closing every card isn't always the best approach.

What About Buy Now, Pay Later, Car Loans and HECS-HELP?

Credit cards are only one part of a lender's assessment.

Other commitments can affect how much you can borrow, but they aren't necessarily assessed in the same way.

Buy Now, Pay Later

Lenders may consider BNPL limits, outstanding balances, scheduled repayments and transaction history, depending on the provider and lender policy.

Car Loans and Novated Leases

These can create ongoing financial commitments that affect borrowing capacity.

Salary-packaged arrangements require particular attention because the lender may need to consider both the income treatment and the lease obligation.

Personal Loans

Existing repayments are generally included when assessing your ability to service a mortgage.

HECS-HELP

Compulsory student loan repayments can affect the income available for mortgage servicing.

The treatment differs from a conventional credit card liability.

Overdraft Facilities

An approved overdraft may be assessed as an available credit commitment, even where the amount currently drawn is low or zero.

Should You Close Your Credit Card After Home Loan Pre-Approval?

If you already have pre-approval, speak with your mortgage broker before changing your credit arrangements.

A pre-approval is generally conditional and is not the same as unconditional loan approval.

Changes to your financial circumstances, credit facilities or liabilities may need to be disclosed or reassessed, depending on the lender and the stage of the application.

Reducing a credit card limit may help your servicing position, but it is still sensible to coordinate the change with the lender's requirements.

And avoid assuming that pre-approval means you can immediately take on additional debt without affecting the final lending decision.

A lender may conduct further checks before issuing unconditional approval or settlement.

What Should You Do Before Applying for a Home Loan?

Before making changes, take a few minutes to review your financial commitments.

1. Check your actual credit limits. Don't rely on the balances showing in your banking app. Identify the approved limit for every card.
2. Review which facilities you use. Some cards may be essential to your household arrangements. Others may have been sitting unused for years.
3. Compare the borrowing position. Find out whether reducing or closing a limit would materially change the loan amount available to you.
4. Allow for the lender's documentation requirements. If you reduce or close a facility, obtain written confirmation.
5. Coordinate changes before applying. Particularly where you have a tight settlement deadline, are buying at auction or are relying on a particular borrowing amount.

You do not need to make every financial decision before speaking with a broker.

In fact, some decisions are better made after understanding how the lender will assess your application.

The Bottom Line: Paying Off Your Credit Card Isn't Always Enough

A credit card with a zero balance can still reduce your borrowing capacity because the lender may assess the approved limit.

But that doesn't mean everyone should close their cards before applying for a home loan.

Sometimes reducing the limit is enough. Sometimes closing the account makes a meaningful difference. And sometimes the card is not the factor preventing you from borrowing what you need.

The important thing is to understand the numbers before acting.

At Triple O Finance, we can review your existing credit limits and compare how different lender assessment policies may affect your borrowing capacity.

Before you close a card you've held for years—or apply for a mortgage without realising what that unused limit is costing you—find out whether the change is actually worthwhile.