What is ‘account conduct’ and how can it affect my chances of getting a home loan?

A quick heads-up: The information in this article is designed as a general educational guide only and does not constitute personalised financial, tax, or legal advice. Because everyone's situation is unique (and bank policies change frequently), we recommend speaking with a licensed Financial Adviser to see how this applies to your specific circumstances. For full transparency on our terms of service, how we are remunerated by lenders, and any specific situations where a fee may apply, please read How We Get Paid.

Getting a home loan approved takes more than just a decent credit score, a solid income, and a good deposit. When a bank looks at your application, they also zoom right in on your day-to-day spending habits—something the banking world calls account conduct.

Under New Zealand's lending rules, banks will usually ask for three to six months of transaction history across all your accounts. Every purchase, fee, and transfer tells them a story about how you manage your money.

Here is a look at what account conduct actually means, the specific red flags that make banks nervous, and how to get your bank statements looking sharp before you apply.

What is account conduct, really?

Put simply, account conduct is the paper trail of how you manage your everyday money.

Banks use it as a kind of financial character check. If you manage your short-term money well, it gives the bank confidence that you’ll handle a 30-year mortgage with the same care.

The 6 red flags banks look for

When credit teams read your bank statements, they are specifically hunting for these warning signs:

1. Unarranged overdrafts

An arranged overdraft (where the bank has pre-approved a $1,000 limit, for example) is generally fine to use.However, an unarranged overdraft happens when your account dips into the negative without asking, or you go over your agreed limit. Even if the penalty fee is just a few dollars, the bank doesn't care about the amount. They see it as a sign that you aren't tracking your daily cash flow.

2. Bounced bills (Dishonoured payments)

If a scheduled direct debit—like your power bill, gym membership, or insurance—bounces because there wasn't enough money in your account, lenders take notice. A pattern of reversed charges makes them worry that your future mortgage payments might bounce, too.

3. Missed debt or Afterpay payments

Lenders will cross-check your statements to make sure you are paying your car loans, personal loans, or Buy Now Pay Later (BNPL) accounts on time. Late fees or missed instalments on short-term debt are a major red flag for financial stress.

Read more here about how Buy Now Pay Later facilities affect your lending

4. Maxed-out credit cards and cash advances

• Going over your limit: If your credit card limit is $2,000, and your statement says you owe $2,100, it tells the bank you aren't respecting the credit boundaries.
• Pulling cash from a credit card: Not a lot of credit card users realise this, but using a credit card at an ATM triggers instant cash-advance fees and sky-high interest rates (often 20%+ instantly). Lenders figure that if you are willing to pay massive fees just to get physical cash, you must be in a tight spot financially. This can sometimes happen by accident. Recent rules brought in mean that gambling is counted in roughly the same way as a cash advance, with that associated cost. A few Lotto transactions on the credit card can mean further explanations are required to the lender.

5. Heavy gambling transactions

A casual flutter or buying a Lotto ticket is perfectly normal. But a heavy, consistent pattern of payments to online betting agencies, TAB, or casinos will almost always trigger extra questions from the bank, and can easily get an application declined.

6. The Payday-to-Zero cycle

Banks prefer to see a little bit of breathing room in your accounts. If your everyday spending account drains down to exactly $0.00 the day before your wages come in, it suggests you don't have a financial buffer for emergencies.

Does a red flag mean an automatic "No"?

Not necessarily. Banks are looking for patterns of behaviour, not a one-off human error.

Almost everyone has missed a $20 utility payment by one day because of a long weekend, or accidentally dipped $5 into the red because an annual subscription renewed unexpectedly. A single, isolated mistake with a good explanation rarely ruins an application.

How to get your bank statements mortgage-ready

If you are planning to buy a house in the next few months, it pays to treat your bank accounts as if they are already being watched. Here are a few easy ways to clean things up:

• Move your direct debits: Change your automatic bill payments so they come out a day or two after your payday. This massively reduces the risk of bills bouncing.
• Keep a buffer: Leave a permanent float of a few hundred dollars in your everyday account rather than transferring every spare cent into savings. It acts as a shock absorber.
• Do an audit: Go back through your statements and cancel any subscriptions or memberships you aren't actually using.

The smartest way to check your accounts

Running an initial review of your transaction statements with a mortgage adviser before you approach a bank allows you to spot any potential conduct flags early.

Crucially, we can do this pre-check without leaving a mark on your credit report.

If you go directly to three different banks to test your luck, they will run three "hard credit checks" which actively damages your credit score. We review your statements, help you tidy up your habits if needed, and direct your application only to the lenders whose rules actually fit your situation—protecting your credit score from unnecessary bank declines.

At Home Loan Factory, we review our clients' bank statements long before they ever reach a bank’s underwriting department. We know exactly which lenders are strict on conduct and which are more flexible, ensuring every application is directed to the right place.