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How Banks Assess Property Investors

How do banks decide whether to lend to a property investor, and how much?

By Andrew, franklenn FINANCE 6 min readUpdated 3 November 2026

The short answer

Banks assess property investors by checking income, living expenses, existing debts and the rental income from current and proposed properties, then testing whether you could afford all repayments at an assessment rate several percentage points above the actual rate. Most lenders only count around 70% to 80% of rent. They also look at your deposit or equity, credit history and the property itself. Policies differ between lenders, so the same investor can get very different answers.

Detailed explanation

Income and expenses

Lenders start with your income: salary, bonuses, overtime, self-employed income and rent. Some types are discounted. For example, bonuses and overtime may only be partly counted, and self-employed income usually needs two years of tax returns.

They then subtract living expenses, using either your declared figures or a benchmark, whichever is higher. Expenses such as childcare, school fees and insurance all reduce what you can borrow.

Rental income is shaded

Most lenders only count part of your rent, often around 70% to 80%, to allow for vacancies, management fees and maintenance. This is called shading. Some lenders shade differently depending on property type or location.

For a new purchase, the lender will usually use a rental appraisal from a property manager or the valuer's estimate.

The assessment buffer

Lenders test your repayments at a higher rate than you will actually pay. APRA, the banking regulator, expects lenders to use a buffer, currently at least 3 percentage points above the loan rate, though this can change. Lenders also usually assess interest-only loans on a principal and interest basis over the remaining term.

Every existing loan is also tested at a buffered rate, which is why serviceability gets tighter with each property you add.

  • All loans assessed at a buffered rate
  • Interest-only loans usually assessed as principal and interest
  • Credit card limits counted, even if you pay them off
  • HECS-HELP, car loans and buy now pay later debts counted

Why lender choice matters for investors

Lenders differ in how they shade rent, which benchmarks they use for expenses, whether they recognise negative gearing benefits, and how they treat existing debts with other lenders. For an investor with several properties, those differences can add up to a big gap in borrowing capacity.

That is where a broker with access to a large panel can help. We compare policies and match you with lenders that suit your situation, though no broker can guarantee approval.

How to strengthen your application

You cannot change lender policies, but you can control a lot of what they see. Reducing or closing credit cards you do not need, paying off small personal loans, keeping clear bank statements and having accurate records of your living expenses all help. If you are self-employed, having up-to-date tax returns lodged makes a big difference.

Timing matters too. Applying soon after a pay rise is confirmed, or after a car loan is paid off, can improve your position. On the other hand, taking on new debt or changing jobs just before applying can make things harder. We can help you plan the timing so your application shows your situation at its best, honestly and accurately.

Finally, be upfront. Lenders verify income, expenses and debts, and inconsistencies can slow or derail an application. A clear, accurate picture from the start usually leads to a faster and smoother result, even if the answer is not quite what you hoped for.

  • Reduce unused credit card limits
  • Pay down small debts where practical
  • Keep tax returns and payslips current
  • Avoid new debts in the months before applying

Worked example

How a lender sees a $548,000 investment loan

Illustrative example only. An investor applies for a $548,000 loan at 6.09% p.a. over 30 years on a property renting for $640 per week. The lender shades rent to 80% and adds a 3% buffer.

Annual rent ($640 x 52)$33,280
Rent counted by lender (80%)$26,624
Actual P&I repayment at 6.09%$3,317.31 a month
Assessment rate (6.09% + 3%)9.09%
Assessed P&I repayment at 9.09%$4,444.87 a month

The lender counts $6,656 less rent than the investor actually receives and tests a repayment about $1,128 a month higher than the real one. That is why investors often find their borrowing capacity lower than expected.

Illustrative only. Figures are examples, not a quote or a recommendation.

Common mistakes

  • Assuming lenders count 100% of your rent
  • Keeping large unused credit card limits
  • Underestimating living expenses on the application
  • Assuming every lender will give the same answer
  • Applying with multiple lenders at once, leaving several credit enquiries

Frequently asked questions

Next steps

Talk to franklenn FINANCE

Want to see how lenders would view your investment plans? Book a free discovery call with franklenn FINANCE and we will compare lender policies for your situation.

This guide is general information only and does not consider your objectives, financial situation or needs. It is not financial, tax or legal advice. Lender policies, rates and government schemes change. Please speak with us, and with your accountant or solicitor where relevant, before acting.

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