Decoding Your Sole Trader Tax Return For Stronger Home Loan Approvals

Self‑employed and trying to work out what your tax return actually means for a home loan?

Banks assess sole traders mainly off your last two years’ individual tax returns and ATO Notices of Assessment (NOAs). They usually start with your taxable profit, adjust for a few lender‑friendly “add‑backs”, average the results, then stress‑test it with APRA’s 3% buffer and a realistic living‑expenses benchmark before deciding how much you can borrow.

This guide walks through that process line by line so you can see issues early – and fix them before you apply.

Lenders start with your lodged tax returns and Notices of Assessment.

1. The documents banks actually want from a sole trader

1.1 Core documents

For a full‑doc home loan as a sole trader, most lenders will ask for:

• Last two years’ individual tax returns (sometimes one year if income is strong and stable)
• Last two ATO Notices of Assessment (NOA)
• Business Activity Statements (BAS) for the last 4–8 quarters (for some lenders)
• Business bank statements (often 3–6 months)
• Personal bank statements (3–6 months)
• If relevant: current ABN registration details and GST registration

If you’re not ready to provide that level of paperwork, you may be pushed towards alt‑doc / low‑doc options (BAS, bank‑statement, accountant letter). These can work, but usually at higher interest rates and lower maximum LVRs. We unpack that trade‑off in more detail in /insights/maximising-borrowing-power-self-employed-low-doc-vs-full-doc.

1.2 Why NOAs matter so much

Your NOA confirms two things lenders care about:

1. The income you actually lodged with the ATO (not just what your accountant drafted), and
2. Whether you owe the ATO money, and if so, how much.

An unpaid or under‑control ATO debt can be a bigger red flag than a credit card. Lenders treat ATO debt as another liability, and a large unpaid balance can materially cut borrowing power or derail approval.

2. How banks turn your tax return into “income”

2.1 Where they look on your return

For a sole trader, lenders typically focus on your Business and professional items – Schedule attached to your individual tax return.

They will usually start with:

• Net profit (taxable income) from your sole trader business
• Any other income on your return (PAYG wages, interest, dividends, rental income, etc.)

From there, they apply adjustments.

2.2 Common lender add‑backs and adjustments

Banks know tax returns are optimised to legally minimise tax, not to maximise borrowing power. So they often add back certain items to get closer to your “real” income, including:

• Depreciation and amortisation (non‑cash expenses)
• Extra super contributions above the compulsory level
• One‑off or abnormal expenses (e.g. legal costs for a once‑off dispute, fit‑out costs expensed rather than financed)
• Some interest expenses where the associated debt will be cleared or refinanced as part of the loan setup

They won’t usually add back:

• Everyday running costs (fuel, materials, subcontractors, insurance)
• Regular personal expenses run through the business (meals, private travel, family phones)
• Ongoing tax or ATO repayment plans

We go deeper into add‑backs – and where banks draw the line – in /insights/smart-add-backs-self-employed-borrowers-bank-ato-safe.

2.3 One‑year vs two‑year income assessment

Most mainstream lenders will:

• Take the last two years’ taxable profit, then
• Either average them, or
• Use the most recent year if it is higher and income is clearly trending up.

If your latest year’s income is more than ~20% lower than the prior year, many lenders will:

• Use the lower figure only, or
• Ask for more detail (BAS, management accounts) and possibly decline the application.

If income jumps up sharply (for example, 50%+), some lenders will still average the two years to be conservative.

2.4 A quick worked example

Say your last two tax years as a sole trader show:

• Year 1 net profit: $120,000
• Year 2 net profit: $150,000
• Depreciation in each year: $10,000
• One‑off legal fees in Year 2: $8,000

A typical lender might do:

• Year 1 adjusted income = $120,000 + $10,000 = $130,000
• Year 2 adjusted income = $150,000 + $10,000 + $8,000 = $168,000
• Average = ($130,000 + $168,000) / 2 = $149,000

So for borrowing‑power purposes, they treat you as earning about $149k before applying buffers and living‑expense rules.

3. What parts of your sole trader return banks don’t care about

3.1 Turnover is not income

Many sole traders fixate on their revenue:

“My business turns over $400k – why is the bank only counting $110k?”

Lenders are interested in profit, not turnover. If your materials, labour and overheads chew through most of that $400k, the part left for your household and your mortgage might genuinely be closer to $110k.

3.2 Drawings vs income

As a sole trader, drawings are just you taking money out of the business bank account. They are not income in the way banks define it.

If your tax return shows $90k net profit but you drew $130k from the business account, banks will still usually base income off $90k (plus any add‑backs), not $130k.

3.3 Cash jobs

If it’s not on your tax return, the bank will not count it. Worse, big unexplained cash deposits in your personal accounts can raise compliance questions.

If your real income depends on cash jobs, talk to your accountant and broker about a 12–24 month clean‑up plan so more of that income is visible and bank‑friendly. We map that journey in /insights/12-24-month-timeline-make-self-employed-financials-bank-ready.

4. How lenders treat ATO debt and payment plans

4.1 Why tax debt is such a big deal

From a bank’s perspective, the ATO is an involuntary priority creditor – if things go wrong, the ATO usually gets paid first.

So lenders will:

• Check each NOA for amount payable and due dates
• Ask about any payment plans
• Often request ATO account statements showing the balance and instalments

They then treat your tax debt like any other loan.

4.2 Example: ATO payment plan impact

Imagine:

• Adjusted income (after add‑backs): $140,000 p.a.
• You owe the ATO $28,000 for last year, on a $1,000 per month payment plan (over 28 months)

Lenders will normally:

• Treat the $1,000 monthly as an ongoing liability when calculating borrowing power
• Sometimes require some or all of the $28k to be cleared before settlement, especially if combined debts are high

The result: borrowing capacity can easily drop by $60k–$150k+, depending on lender policy.

We go deep on this dynamic in the sibling article “ATO Debt, Payment Plans and Your Home Loan: What Lenders Really Think”.

4.3 Should you pay the ATO before applying?

It depends:

• Clearing tax debt can boost borrowing power and reduce perceived risk.
• But draining all your cash to pay the ATO can leave you without buffers, which lenders and Roy Morgan mortgage‑stress data (over 30% of borrowers ‘At Risk’ when repayments are too high relative to income) suggest is dangerous.

The sweet spot is usually a coordinated plan: enough ATO debt reduction to satisfy the lender, while keeping at least a few months’ living and business expenses in cash.