Costly Mistakes Borrowers Make

Applying for a home loan should feel exciting — a major step toward a new home, an investment property, or a more affordable refinance. But in 2026, more lenders are tightening their review processes, and simple mistakes are causing more applications to be delayed, questioned, or even declined.

The good news? Most of these issues are completely avoidable with the right preparation. Recent national research highlights just how common these borrower errors are — and why understanding them could make all the difference in getting your loan approved smoothly.

Let’s break down what’s happening and how you can protect your application.

1. Underestimating Living Expenses: The #1 Reason Applications Get Flagged

According to Money.com.au’s 2026 lending research, 1 in 5 homeowners (20%) underestimated their living expenses during the mortgage application process — and for some, that error was significant enough to jeopardise the loan entirely. [money.com.au]

The same research found:

• Some applicants underestimated their spending by over $1,000 per month, pushing them below lender serviceability thresholds. [money.com.au]

• 12% only proceeded because the broker or lender caught the mistake and corrected it. [money.com.au]

• 8% were rejected outright because of this single issue. [money.com.au]

Why this matters:

Lenders are scrutinising every transaction more closely. Your declared expenses must match your actual spending patterns — or the bank will question your figures.

How to avoid this mistake:

✔ Track your spending for at least 3 months

✔ Avoid estimates — use real numbers

✔ Review your bank statements before we submit anything

✔ Ask us to help reconcile your expenses with lender categories

2. “I Didn’t Know That Counted”: Misunderstanding Serviceability

Many borrowers assume serviceability is based only on income versus loan repayments. But lenders assess much more, including:

• everyday spending

• subscriptions

• childcare

• insurance

• utilities

• transport

• discretionary spending

• personal debts and BNPL history

Money.com.au reports that most people don’t know how much they spend each month, and their declared figures often don’t match their transaction history. Lenders will identify this instantly. [money.com.au]

The risk:

Even accidental discrepancies can trigger:

• reassessment

• delays

• a lower borrowing capacity

• or an outright decline

Your advantage with a broker:

Before your application goes anywhere near a lender, we help:

✔ review your bank statements

✔ categorise your expenses correctly

✔ identify red flags

✔ improve your borrowing position where possible

3. Younger Borrowers Are Most at Risk of Application Errors

The research also found that younger Australians are significantly more likely to underestimate their living expenses or misunderstand lender requirements. [money.com.au]

This can be due to:

• fluctuating income

• higher discretionary spending

• less experience managing financial paperwork

• assumptions based on social media finance “tips”

If you’re a first‑home buyer :

You are not alone — and these challenges are completely normal. The key is having someone walk you through the numbers before you apply.

4. Why These Issues Matter Even More in 2026

With lenders tightening policies and reviewing applications more carefully than in previous years, accuracy is now essential.

In 2026, banks are:

• more cautious about over‑stated borrowing capacity

• enforcing stricter responsible lending obligations

• placing a stronger emphasis on consistent spending patterns

• reviewing bank statements line‑by‑line

• re-running full serviceability checks during refinancing (yes, even for existing customers)

This means even small inconsistencies — a forgotten subscription, a misreported expense category, or a new BNPL purchase — can alter the outcome of your loan.

5. How to Prepare for a Strong, Stress‑Free Application

To give you the best chance of approval, here’s what we recommend borrowers do:

✔ Step 1: Track your last 90 days of spending

Banks use this exact data — so we should too.

✔ Step 2: Avoid large, unusual transactions before applying

Big purchases can distort affordability.

✔ Step 3: Pause Buy Now, Pay Later (BNPL) use

Even small BNPL commitments impact your borrowing capacity.

✔ Step 4: Review and tidy up your bank statements

Look for recurring charges you’ve forgotten about — lenders will spot them.

✔ Step 5: Let me review your figures before we hit submit

This is one of the biggest advantages of using a broker. A 5‑minute review could be the difference between approval and decline. We are here to help you avoid costly mistakes borrowers make.

6. Our Role as Your Broker

As your broker, our job is to make the application process:

✨ easier ✨

✨ more accurate ✨

✨ less stressful ✨

✨ & more successful ✨

Here’s how we help you avoid costly mistakes:

• We assess your real spending, not your guess

• We identify potential red flags early

• We explain exactly how lenders view your financial habits

• We match your application to lenders who are likely to say “yes”

• We help you restructure or adjust your spending where necessary

A Better Application Starts With Better Awareness

to avoid Costly Mistakes Borrowers Make

Borrower behaviour is under the microscope —

but with the right guidance, you can avoid the

pitfalls that many Australians unknowingly fall into.

If you’re planning to buy, invest, or refinance this year,

getting your numbers right from the beginning will put you

miles ahead of the average applicant.

Disclaimer: The content of this article is general in nature and is presented for informative purposes. It is not intended to constitute tax or financial advice, whether general or personal nor is it intended to imply any recommendation or opinion about a financial product. It does not take into consideration your personal situation and may not be relevant to circumstances. Before taking any action, consider your own circumstances and seek professional advice. This content is protected by copyright laws and various other intellectual property laws. It is not to be modified, reproduced or republished without prior written consent.