When you're applying for a home loan, it is tempting to think your income is simply a number.

You earn $180,000 a year. Your partner earns $120,000. Together, that's $300,000.

So how much can you borrow?

The reality is more complicated.

Banks and other lenders don't simply add up every dollar that comes into your account and use the total to calculate borrowing capacity. They assess what the income is, where it comes from, how consistent it has been, how likely it is to continue and what evidence supports it.

That distinction can become particularly important for professionals with bonuses, commissions or allowances, business owners with multiple income streams, investors receiving rental income, or households combining several different sources of income.

It also explains why two households with identical headline incomes can receive very different borrowing outcomes.

The central question for a lender is not simply:

“How much does this person earn?”

It is closer to:

“How much reliable income can we reasonably recognise when assessing whether this borrower can repay the loan?”

That is why understanding how income is assessed can be just as important as knowing your salary.

Banks Assess Income, Rather Than Simply Counting It

Lenders are trying to establish sustainable repayment capacity.

Under APRA's guidance for residential mortgage lending, prudent lenders are expected to verify income and make appropriate adjustments where income is temporary, uncertain, seasonal or variable. APRA specifically identifies bonuses, overtime, rental income, investment income and variable commissions as income that may require significant discounts.

This is commonly referred to as income shading.

Income shading does not necessarily mean a lender believes you aren't actually earning the money. It means the lender is allowing for the possibility that the income could fluctuate or disappear.

For example, imagine someone earns:

Base Salary
$160,000
Annual Bonus
$20,000
Overtime
$15,000

Their actual income may be $195,000.

But a lender may not necessarily assess the application using $195,000.

The base salary may be treated much more favourably than the bonus and overtime, particularly if those variable components don't have a strong history.

This distinction between actual income and assessed income is one of the most important concepts to understand when considering borrowing capacity.

How Banks View Different Types of Income

1

PAYG Salary: The Simplest Income for a Lender to Understand

A regular PAYG salary is generally the most straightforward income for a lender to verify.

If you receive a consistent salary from an established employer, there is usually a clear paper trail:

  • Employment information
  • Payslips
  • Year-to-date income
  • Salary credits into your bank account
  • Employment history

Because the income is relatively predictable, base salary is generally treated more favourably than variable income. But even here, the details matter.

A lender may look at whether you are:

Permanent full-time Permanent part-time Casual On probation Fixed-term contract Recently promoted

APRA's guidance specifically says lenders should verify employment status and consider whether income is regular and sustainable.

So while a $200,000 salary is relatively straightforward, a person who started receiving that salary only recently may not necessarily be assessed in exactly the same way as someone who has earned it consistently for several years.

Why this matters: A promotion can increase your actual income immediately, but the way a lender treats that increase may depend on the evidence available. That's why when the income changed can be almost as important as what the new income is.
2

Casual Income: Consistency Becomes More Important

Casual employment introduces another question for a lender: How dependable are the hours?

Someone working casually might earn a substantial amount over a year, but their hours may vary from week to week. The lender therefore needs to determine whether the income represents a sustainable pattern rather than a particularly strong period.

Lenders may look for around 6–12 months of employment history, although the precise requirements can differ between lenders.

This means two people earning the same annual amount could be assessed differently if one receives a guaranteed salary and the other relies on variable casual hours.

The important question isn't whether casual income is "good" or "bad". It is whether there is sufficient evidence that the income is ongoing and reliable.

3

Overtime, Bonuses and Commissions: Income With a Question Mark

Variable income is where borrowing capacity can become particularly interesting.

Overtime, bonuses and commissions can make up a meaningful portion of a professional's annual earnings. But lenders generally recognise that variable income may not repeat at the same level every year.

APRA's guidance says prudent lenders should apply appropriate adjustments to variable income and notes that discounts of at least 20% on most non-salary income are prudent practice, although the actual treatment is determined by individual lender policies.

For example, suppose someone receives:

  • Base salary: $150,000
  • Bonus: $30,000
  • Commission: $20,000

Their actual annual income is $200,000. But the lender may not use the full $50,000 of variable income in its serviceability calculation. It might:

  • Average the income over multiple years
  • Apply a percentage reduction
  • Require evidence that the income is ongoing
  • Use a lower historical year
  • Or, depending on policy, exclude a component altogether
This is where lender policy matters: One lender may be relatively comfortable with a consistent history of commissions. Another may be considerably more conservative. So if a large portion of your income comes from variable remuneration, the question isn't simply: "How much did I earn?" It is: "How does the lender I'm considering recognise the income I've earned?"
Professionals reviewing financial documents in a modern office
Lenders assess the sustainability and structure of your income, not just the headline number.
4

Self-Employed Income: The Payslip Is No Longer the Whole Story

Self-employed borrowers often have a more complicated income story.

An employee can generally point to a payslip and say, “This is what I earn.” A business owner may have:

Business revenue Operating expenses Director salary Distributions Retained profits Depreciation Trust structures

The lender therefore needs to understand the underlying financial position rather than simply looking at money moving into a personal account.

APRA specifically notes that self-employed borrowers can be more difficult to assess because their income tends to be less certain, and expects prudent lenders to take reasonable steps to verify available income using documentation such as tax returns, Notices of Assessment, bank statements, business activity statements and accountant information.

Sole traders vs. Company directors

For a sole trader, historical performance becomes important. A single exceptionally strong year may not automatically translate into the same borrowing capacity as several years of consistent results.

Company structures can become more complex. A director might receive a salary while the company also generates profit. Depending on lender policy, a lender may consider director remuneration, business profit, ownership percentage, retained earnings, and allowable add-backs (like depreciation).

The key point: Business income needs to be understood in context. A business owner can have a high level of revenue but relatively modest assessable income.

5

Rental Income: Your Rent Is Not Usually Treated Like Salary

Rental income is another area where borrowers can overestimate their borrowing capacity.

If an investment property produces $800 a week in rent, that is approximately $41,600 a year in gross rental income.

It would be tempting to assume the lender simply adds $41,600 to household income. Generally, it doesn't work that way. Rental income can be affected by:

  • Vacancy periods
  • Property management fees
  • Maintenance and strata
  • Changes in market rent

APRA's guidance specifically says prudent lenders should allow for periods of non-occupancy and apply a minimum 20% haircut to expected rental income. A common industry treatment is recognising 80% of gross rent, while recognising that lender policies vary.

So: $41,600 gross rent does not necessarily mean $41,600 of assessable income.

This is particularly important for existing property owners considering another investment. The additional property creates rental income, but it also creates additional debt and expenses. The lender is assessing the overall effect on serviceability.

6

Government Payments: Stability and Duration Matter

Government payments are another example of why “income” does not automatically equal “assessable income”.

The treatment can depend on what the payment is, whether it is ongoing, how long it is expected to continue, the borrower's circumstances, and the lender's individual credit policy.

Permanent benefits such as the Age Pension and certain Disability Support Pension payments are potentially more acceptable, while temporary or transitional payments may receive different treatment.

The broader principle is straightforward: The longer and more reliably an income stream can be demonstrated, the easier it is for a lender to assess its sustainability.

7

Investment Income: Returns Aren't Always Treated as Guaranteed

Income from investments can include dividends, interest, trust distributions, and managed fund distributions.

Again, the lender is interested in sustainability. A large dividend received once does not necessarily demonstrate a permanent income stream. The lender may examine historical distributions and may require evidence that the underlying investment assets will remain in place.

If you own a share portfolio worth $500,000 and received a $25,000 dividend last year, the lender may want to understand whether that income is recurring and if the assets remain invested. Investment income can therefore contribute to borrowing capacity, but it shouldn't automatically be treated as equivalent to a guaranteed salary.

8

Trust Distributions and Other Complex Income

Trust income can become particularly complicated because the amount appearing in a person's tax return may not tell the entire story.

The lender may need to understand the trust structure, the borrower's entitlement, distribution history, underlying business or investment activity, and whether the income is genuinely available to the borrower.

This is another reason why complex income should be assessed based on the whole financial structure, rather than a single figure from a tax return.

9

Allowances and Child Support: The Details Matter

Some borrowers also receive income through allowances or child support.

Employment allowances may be recognised where they are regular and supported by employment documentation, although treatment can vary. Child support can also be accepted by some lenders, but may require evidence of a formal arrangement and a consistent payment history.

The pattern is consistent: The more unusual the income source, the more important its history, documentation and lender policy become.

The Income You Earn vs. The Income the Bank Uses

This is probably the most important distinction in the entire topic.

Imagine a household with the following income structure:

Income Source Actual Annual Income
Base salaries $220,000
Bonuses $40,000
Overtime $20,000
Rental income $35,000
Investment income $10,000
Total actual income $325,000

It would be easy to look at that table and conclude that the household earns $325,000.

They do.

But a lender's serviceability model may use a different figure after applying its own rules to variable income, rental income, investment income, existing debts, living expenses, credit limits, the proposed mortgage, and the assessment interest rate.

That is why borrowing capacity isn't simply a percentage of household income.

Income Verification: Proving What You Earn

Before a lender can assess income, it needs evidence. Common documentation includes:

PAYG Borrowers

  • Recent payslips
  • Year-to-date income
  • Bank statements showing salary credits

Self-Employed

  • Personal/business tax returns
  • Notices of Assessment
  • Business activity statements
  • Accountant information

Investors

  • Rental statements
  • Property documentation
  • Tax returns
  • Evidence of investment income

This is why having a strong income isn't enough. The income needs to be explainable and verifiable.

Why the Same Income Can Produce Different Borrowing Capacity

This is where many borrowers are surprised. You could give the same income information to two banks and receive two different borrowing outcomes.

Why? Because lenders can have different policies around overtime, commissions, bonuses, casual income, self-employed income, rental income, government payments, living expenses, existing liabilities, credit card limits, HELP debt, and serviceability calculations.

This is one of the reasons a borrowing-capacity calculator should be treated as an estimate, rather than a guarantee of what a particular lender will approve.

Modern architectural home representing property investment goals
Your property goals require a borrowing strategy tailored to how lenders view your specific income structure.

The 100% Income Myth

One of the biggest misconceptions is: “If I earn it, the bank will count it.”

Not necessarily. Consider two professionals:

Professional A

  • $180,000 base salary
  • No bonus
  • Stable employment

Professional B

  • $130,000 base salary
  • $30,000 commission
  • $20,000 bonus

Both earn $180,000 in a strong year. But their income profiles are different.

Professional A has a larger proportion of predictable base income. Professional B has a larger variable component that may require additional evidence, averaging or shading. Neither income structure is inherently better. But the way a lender assesses them can be different.

A Better Way to Think About Your Borrowing Capacity

Instead of looking at your income as one large number, break it down.

1

Identify every income source

List base salary, overtime, bonuses, commissions, allowances, rental income, business income, dividends, trust distributions, and government payments.

2

Identify how stable each source is

Ask: How long have I received it? Is it contractual? Does it fluctuate? Is it dependent on performance? Is it likely to continue?

3

Understand how lenders may treat it

This is where lender policy becomes important. Don't assume that because one lender recognises an income stream in a particular way, every lender will do the same.

4

Calculate the broader financial position

Income needs to be considered alongside debts, expenses, credit limits, property loans, dependants, existing property, available equity, and cash reserves.

5

Consider what happens after the loan settles

The strongest borrowing outcome isn't necessarily the one that produces the biggest approved number. It may be the structure that leaves you with manageable repayments, adequate cash reserves, flexibility, and capacity for the next stage of your plan.

The Real Question Is Not “How Much Do I Earn?”

Your income matters.

But when a bank assesses a home loan, the source, stability, history and documentation of that income matter too.

A $250,000 household income can mean very different things depending on whether it consists of two stable salaries, a salary plus commissions, business income and distributions, rental income, or a combination of several sources.

That's why understanding lender policy can be so valuable.

The objective isn't simply to find a lender that will count the highest possible amount of income. It is to understand how your income profile interacts with the lender's serviceability model, your existing financial commitments and the strategy you're trying to achieve.

For existing homeowners and professionals with more complex financial positions, that distinction can make a significant difference.

The right question isn't simply:

“How much will the bank lend me?”

It's:

“Given the income I have, the way it is structured, the debt I already carry and what I want to achieve next, what borrowing position makes sense?”

That is a much more useful starting point for making a property decision that works not just today, but as your financial position evolves.