What Lenders Actually Look At When Assessing Your Home Loan

Short answer:

When a lender assesses your home loan, they look well beyond your salary. They weigh five main things: your income (and how reliable it is), your living expenses, your existing debts, your deposit and savings history, and your credit history. They then stress-test whether you could still afford repayments if rates rose by 3 per cent. Crucially, different lenders assess the same person quite differently, so understanding what they look at, and presenting it well, can be the difference between approval and decline. This article breaks down exactly what is going on behind the scenes.

Applying for a home loan can feel like a black box: you hand over your documents and wait for a yes or no. But lenders are actually working through a fairly consistent set of checks, and once you understand them, you can put your application in the strongest possible position. Here is what a lender is really looking at.

The Five Things Every Lender Assesses

 
Almost every home loan assessment comes down to five core areas. A lender is trying to answer one question, can this person comfortably repay this loan, and these are the pieces they use to work it out.

1. Your Income, and How Reliable it is

 
This is the starting point, but it is more nuanced than your gross salary. Lenders treat different income types differently, based on how dependable they are. This is called shading, and it catches a lot of people by surprise:

  • Base salary (permanent): usually counted at 100 per cent. This is the gold standard.
  • Overtime, bonuses and commission: often counted at only around 80 per cent, and sometimes less, because they are not guaranteed. Some lenders are far more generous here than others.
  • Casual income: usually accepted, and most lenders are comfortable once you have been in the role for around 6 months.
  • Rental income: typically counted at around 80 per cent to allow for vacancies and costs.
  • Self-employed income: generally assessed on your last two years of tax returns.

This is one of the biggest reasons the same person can be assessed differently by different lenders. If a large part of your income is overtime or casual, the lender you choose matters enormously.

2. Your Living Expenses

 
Lenders do not simply take your word on what you spend. They compare your declared expenses to a benchmark called the Household Expenditure Measure (HEM), and use whichever is higher. Your household size and number of dependants feed into this, because more people in the home means higher assumed costs. In the months before you apply, it genuinely helps to keep your discretionary spending in check, because your recent bank statements tell the story.

3. Your Existing Debts

 
Every existing commitment reduces how much you can borrow, and some hurt more than people expect:

  • Credit cards: assessed on your limit, not your balance. A $10,000 limit you never use can still cut your borrowing power by $50,000 or more. Reducing or closing unused cards is one of the fastest ways to lift your capacity.
  • Car and personal loans: the monthly repayments come straight off your borrowing capacity.
  • HECS or HELP debt: your compulsory repayment is treated as an ongoing commitment and can reduce capacity noticeably.
  • Buy now, pay later: facilities like these are increasingly scrutinised and can count against you.

4. Your Deposit and Savings History

 
Lenders look not just at how much deposit you have, but at how you got it. Most want to see genuine savings, meaning funds you have built up and held in your account for at least three months, usually around 5 per cent of the price. This shows the financial discipline to meet repayments. A lump sum that landed last week, whether a gift, inheritance or tax refund, may not count as genuine savings on its own without that savings history behind it. This one catches a lot of first home buyers, so it is worth starting the savings habit early.

5. Your Credit History

 
Finally, the lender checks your credit file, which records how you have managed credit in the past. They look at your repayment history, any defaults or arrears, and recent credit enquiries. A clean history helps you; a patchy one can limit your options or your rate. It is worth checking your own credit report before you apply, which you can do for free through Equifax, Experian or illion, and correcting any errors, because they do occur.

The Stress Test on Top of Everything

 
Once a lender has worked through those five areas, they apply one more critical filter. They do not check whether you can afford repayments at today’s rate, they check whether you could still afford them if rates rose. APRA requires lenders to add a serviceability buffer of 3 per cent on top of your actual rate. With variable rates in the low 6 per cent range, that means you are assessed as though your rate were over 9 per cent.

Two rules shaping assessments in 2026

The 3 per cent buffer is the big one, and it is why your borrowing power is lower than simple income multiples suggest. On top of that, from February 2026 APRA limits how much lending banks can do at six times a borrower's income or more, which mainly affects those borrowing close to their maximum. Both rules make lender choice and a well-presented application matter more than ever.

A Word on Timing and Stability

Lenders value stability. Changing jobs in the three to six months before you apply can create uncertainty, even if the new role pays more, and income earned during a probation period is often not counted. Being in a new role or probation period can also mean fewer lender options are available to you, because lenders differ on how they treat recent job changes, and some will not look at an application until probation is complete. Just as importantly, your financial position at final approval needs to be as strong as it was at pre-approval, so taking on a new car loan or credit card between the two can unravel an approval. If a job change or big purchase is on the horizon, tell your broker early so it can be planned around.

Why The Same Application Gets Different Answers

 
Here is the point that ties it all together. Every lender applies these five areas and the stress test, but they apply them differently. One shades overtime at 80 per cent, another at 100. One is strict on casual income, another flexible. One treats a HECS debt harshly, another more gently. The result is that the same applicant can be offered loans that differ by tens of thousands of dollars, or be declined by one lender and approved by the next.

That is exactly why working with a broker matters. Our job is to understand how each lender assesses, then match your specific situation, your income mix, your debts, your savings, to the lender most likely to say yes on the best terms. You only see the strongest path, rather than guessing and risking a knock-back that leaves a mark on your credit file.

Frequently Asked Questions

 

Lenders assess five main things: your income and how reliable it is, your living expenses, your existing debts, your deposit and savings history, and your credit history. They then stress-test your ability to repay at 3 per cent above the actual rate.

Shading is where lenders count only a portion of less reliable income. Base salary is usually taken at 100 per cent, while overtime, bonuses and commission are often counted at around 80 per cent, and rental income at about 80 per cent, because they are less guaranteed.

Yes. Casual income is usually accepted, and most lenders are comfortable once you have been in the role for around 6 months. As with any income type, some lenders are more flexible than others, so the right lender choice matters.

Genuine savings are funds you have built up and held in your account, usually for at least three months and often around 5 per cent of the purchase price. A recent lump sum, gift or inheritance may not count as genuine savings on its own without that history.

Yes, and more than most people expect. Lenders assess credit cards on the limit, not the balance, so a $10,000 limit you never use can still reduce your borrowing power by $50,000 or more. Reducing or closing unused cards can help.

It can. Changing jobs shortly before applying, or being on probation, can create uncertainty and often means fewer lender options, as some lenders will not proceed until probation is complete. If a job change is coming up, speak with your broker so it can be planned around.

Because each lender applies its own rules to income shading, expenses, debts and credit history. The same applicant can be assessed tens of thousands of dollars apart, which is why being matched to the right lender is so valuable.

The Bottom Line

 
A home loan assessment is not a mystery once you know the five things lenders weigh: income, expenses, debts, deposit and credit history, all filtered through a stress test at 3 per cent above the real rate. The applicants who get approved on the best terms are the ones who present each of these well, and who apply to the lender that views their situation most favourably.

That matching is the heart of what we do for first home buyers across Newcastle, Maitland and the Hunter. If you would like to understand exactly how a lender will see your application, and how to make it as strong as possible, book a free strategy session with our team.

In Financial Services is a mortgage brokerage based in Newcastle and Maitland, serving first home buyers across the Hunter Valley and Central Coast. This article is general information only and does not take your personal circumstances into account. Lender policies vary and change over time, so please speak with us for guidance specific to your situation.

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