The single biggest frustration among self-employed home loan applicants is the gap between what they know they earn and what the bank says they earn. A tradie running a business turning over $600,000 may find a bank offering a loan size suited to a $100,000 salary. It feels insulting — and it's worth understanding why it happens.
It's not a mistake. It's a consequence of how tax minimisation interacts with mortgage assessment. This guide explains every layer of the gap and what you can do about it.
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Layer 1: Revenue vs Taxable Income
Your business might bring in $400,000 a year. But after legitimate business expenses — wages, rent, materials, vehicle costs, insurance, software — you might have $150,000 in net profit. Then depreciation claims, superannuation contributions, and prepaid expenses might bring that to $90,000 in taxable income.
The bank starts at $90,000. Not $400,000.
Layer 2: Taxable Income vs Assessable Income
From the $90,000 taxable income, lenders add back certain non-cash or non-recurring items:
- Depreciation (building, plant, equipment): +$25,000
- Motor vehicle depreciation: +$8,000
- One-off large expense (uncommon but sometimes): +$10,000
So assessable income: $90,000 + $43,000 = $133,000
The bank lends based on $133,000 — not $400,000. This is the fundamental disconnect between business revenue and mortgage borrowing capacity.
A Worked Example: The $300K Business vs the $120K Assessment
| Item | Amount |
|---|---|
| Business turnover | $300,000 |
| Business expenses (60%) | −$180,000 |
| Net profit | $120,000 |
| Depreciation claimed | −$25,000 |
| Super contributions (extra) | −$15,000 |
| Prepaid insurance (June) | −$8,000 |
| Taxable income | $72,000 |
| Add: depreciation | +$25,000 |
| Assessable income (lender) | $97,000 |
The business owner earns well. But the lender sees $97,000. On that income, a major bank might approve $550,000–$600,000. The business owner likely expected $800,000+.
Five Strategies to Close the Gap
1. Reduce Tax Minimisation in the Application Year
In the financial year before you apply, reduce or defer aggressive deduction strategies. Pay slightly more tax to show higher assessable income. The additional tax cost is usually much less than the value of the extra borrowing capacity.
2. Use a Lender with Generous Add-Back Policy
Not all lenders add back the same items. Some lenders are far more generous in their assessment, adding back interest on investment properties, additional super contributions, and motor vehicle costs. A broker who knows each lender's policy can identify the one that gives your application the best result.
3. Include All Legitimate Income Sources
Make sure your tax return includes all income sources: salary, dividends, trust distributions, rental income. If you've been taking minimal salary and leaving profits in the company, those retained earnings don't count — take a proper salary/dividend package and document it for 2 years.
4. Use a Low Doc Product
If your BAS statements show higher turnover than your tax return income suggests, a low doc lender uses BAS-derived income instead. This can significantly increase assessable income — but involves a slightly higher interest rate and usually requires a 20% deposit.
5. Talk to Your Broker 12 Months Early
The most effective strategy is timing. If your broker reviews your financials 12 months before application, they can advise your accountant on how to structure the next year's return to maximise assessable income. This is legal, ethical, and practical — it's simply understanding the interaction between tax planning and lending assessment.
Frequently Asked Questions
our broker team specialises in self-employed home loans and works with business owners and their accountants to maximise assessable income. Call 0432 634 648 for a free income review.
Related: Self-Employed Guides
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