How to Use Tax Returns to Prove Income for Your Home Loan

Most Australian lenders use your lodged personal and company tax returns as the main proof of income for a home loan, especially if you’re self‑employed or a company director. Instead of looking at what you draw from the business week to week, they look at your taxable income over (usually) the last two years, apply their own adjustments and then stress‑test repayments with a 3% serviceability buffer (per APRA guidance). Understanding that process is the difference between a smooth approval and a nasty surprise.

This guide walks through exactly how lenders read your tax returns, the traps for company directors and small‑business owners, and what you can fix this week to present a stronger income story.

Lenders start by analysing your lodged personal and business tax returns.

1. Why tax returns matter so much in home loan approvals

For employees, payslips and group certificates usually tell the story. For business owners, investors and company directors, tax returns are the anchor document. They are signed, lodged with the ATO and subject to penalties if they’re wrong — so banks trust them.

Most lenders require at least two years of lodged personal tax returns and (where relevant) business financials and company returns before they will fully rely on self‑employed income. Some niche lenders will work off one year, but usually on tighter terms and lower maximum borrowing capacity.

What lenders are trying to answer

Every credit assessor is trying to answer a simple question:

"Can this person afford their home loan even if rates rise or their income dips?"

To do that, they:

1. Start with taxable income from your personal return.
2. Add or subtract items from your personal and company returns (add‑backs and adjustments).
3. Deduct living expenses (often benchmarked to HEM) and other debts.
4. Test repayments at an interest rate at least 3% above the actual rate (APRA buffer).

Roy Morgan’s research shows over 28% of Australian mortgage holders are currently ‘At Risk’ of mortgage stress, so lenders are under real pressure to be conservative.

If your tax returns under‑state your real earnings, your borrowing power will be clipped, even if business is booming today.

2. How lenders read your personal tax return

Your personal tax return ties everything together — salary, business income, dividends, distributions and rental properties. For most self‑employed borrowers, it is the starting point for serviceability.

2.1 Key sections lenders focus on

When an assessor opens your tax return, they are scanning for:

• Salary and wages (PAYG) – for those who are partly employed.
• Business or professional income (sole trader) – net profit after expenses.
• Distributions from trusts or partnerships – especially if you control the entity.
• Dividends from private companies – including franking credits.
• Rental income – rent received, interest, other costs and depreciation.
• Other income – interest, foreign income, capital gains.

They then cross‑check these with your Notice of Assessment (NOA) to ensure the return was lodged and accepted by the ATO.

2.2 Common add‑backs from your personal return

Tax law encourages you and your accountant to minimise taxable income. Lenders do the opposite: they try to estimate your true ongoing income.

They will often add back items such as:

• Work‑related or business depreciation – non‑cash, so usually added back.
• Extra personal super contributions – salary‑sacrifice above compulsory levels may be added back.
• One‑off expenses – major once‑off costs can sometimes be excluded from the income calculation if you document them.
• Certain interest costs – e.g. interest on investment loans can be added back to income and then treated separately as an expense.

Each lender has different rules (and risk appetite), which is why the same return can produce very different borrowing capacities across banks.

2.3 Rental properties and negative gearing

For investors, lenders usually:

• Start with gross rental income from your return.
• Deduct non‑cash costs like building depreciation (add‑back to income).
• Leave in real cash costs like interest, rates, insurance and repairs.

This means the negative gearing benefit that helps at tax time doesn’t always help at loan time. The bank is focused on whether you can cover all your loans if rents fall or rates rise.

2.4 Red flags on personal tax returns

Lenders are cautious about:

• Large, unexplained income drops between years.
• Unlodged or late returns – signs of poor financial control.
• High ‘other deductions’ without clear support.
• Tax debts on payment plans – especially if there are missed payments.

If any of these apply, it’s rarely a deal‑breaker, but you’ll need to explain and document them carefully.

For more detail on how your broader business picture is assessed, see How Banks Read Your Business Financials Before a Home Loan.

3. How lenders read company and trust tax returns

If you trade through a company or trust, your personal return is only half the story. Lenders will usually ask for:

• Two years of company or trust tax returns.
• Two years of full financial statements (profit and loss, balance sheet).
• Sometimes interim figures if your most recent year end is old.

3.1 Company profit vs director income

A common misconception is that only the salary and dividends you draw personally count as income. In practice, many lenders will also look at retained business profits, especially when:

• You own and control the company (often >50% shareholding).
• Profits are stable or growing.
• You can access those profits as salary, dividends or drawings if needed.

They may calculate your income as:

Your salary/dividends plus your share of adjusted company profit, after allowing for reasonable business reinvestment.

For example, if you pay yourself $80,000 but the company makes $150,000 profit after your wage, a lender might assess your usable income closer to $150,000–$180,000 after adjustments, not just $80,000.

3.2 Typical add‑backs in company financials

From the company or trust tax return and financials, lenders often add back:

• Depreciation and amortisation – non‑cash charges.
• Extra super contributions for owners.
• One‑off legal, relocation or restructuring costs.
• Personal expenses pushed through the business – where clearly identified.

They will not usually add back:

• Ordinary wages and super for other staff.
• Regular rent, utilities or marketing.
• Finance lease payments where the debt continues.

This is where a good accountant–broker team can present a clear reconciliation, rather than leaving an assessor to guess.

3.3 Business debts and personal guarantees

Most business debts with personal guarantees — overdrafts, business credit cards, vehicle finance, equipment loans — are treated as personal commitments in home loan serviceability tests, regardless of whether repayments come from a business account.

That means the more business debt you carry, the more it can reduce your home borrowing power. This is one reason many self‑employed borrowers keep home, investment and business debt split into separate loan facilities.

3.4 Trusts and distributions

If you operate through a discretionary trust, lenders look for:

• Trust deed and latest trust tax returns.
• Distribution statements showing who actually receives income.
• Your level of control over the trust (e.g. appointor, trustee, director of corporate trustee).

Usually they will only rely on income you actually receive, or income you could reasonably receive given your control. If you’re distributing profits to adult children or parents for tax reasons, that may reduce the income counted towards your home loan.

4. How income from tax returns is actually calculated

Different lenders have different calculators, but their approaches fall into a few common patterns.

4.1 Two‑year averaging vs most recent year

Standard full‑doc policies usually:

• Take two years of taxable income (after adding back agreed items).
• Either average them, or
• Use the lower year, or
• Use the most recent year if it’s lower by less than a certain margin (often 10–20%).

Example 1 – increasing income

• FY2023 adjusted income: $100,000
• FY2024 adjusted income: $150,000

Possible lender treatments:

• Lender A (averaging): (100k + 150k) / 2 = $125,000 assessed income.
• Lender B (most recent, within 20% growth): $150,000 assessed income.

Same tax returns, but a $25,000 income difference on paper, which can materially change how much you can borrow.

Example 2 – a bad year

• FY2023 adjusted income: $180,000
• FY2024 adjusted income: $120,000 (down 33%)

Many lenders in this case will either:

• Take the lower figure only ($120,000), or
• Ask for explanations, interim figures or extra supporting documents.

If there’s a clear one‑off reason (e.g. shutdown for renovation, large once‑off expense), a broker may be able to position it favourably.

4.2 Company director with retained profits – worked example

You’re a company director and 100% shareholder.

• Personal salary: $90,000
• Franked dividends: $10,000
• Company profit after your wage: $140,000
• Add‑backs (depreciation, extra super, one‑off legal): $30,000

Adjusted company profit: $170,000

Possible lender positions:

• Conservative: assess $100,000 (salary + dividends only).
• Moderate: take salary + dividends + 50% of adjusted profit = $90k + $10k + $85k = $185,000.
• Aggressive: take full adjusted profit where clearly accessible = $170k (company) + $10k dividends = $180,000–$190,000 total.

Again, policy choice can double your assessed income without changing a cent of tax.

For more depth on how banks interpret your small‑business numbers overall, see How Banks Really Judge Your Small Business At Home Loan Time.

4.3 Comparison: how different income types are treated

This is simplified — each lender overlays its own rules — but it gives you a feel for how far beyond “taxable income” assessors will look.

Tax returns bring together multiple income streams that feed into your borrowing capacity.