There's a fundamental tension between running a tax-efficient business and qualifying for a large home loan. The same strategies that reduce your tax bill — depreciation, deductions, income splitting — reduce your assessed income in lenders' eyes. Understanding how lenders assess self-employed income is the key to navigating this. Start by reading how banks assess self-employed income in Australia — then apply these strategies before you apply.
Plan 12–18 Months Ahead
Most of these strategies require time to take effect — you need lodged tax returns or at least 4 quarters of BAS to evidence the change. If your purchase is 12+ months away, all 8 strategies are available to you. If you need to borrow now, focus on the lender-side strategies (3, 4, 5) that don't require time. Use our borrowing power tool to see your current position before and after each strategy.
The 8 Strategies
Use Add-Backs Strategically
Lenders allow certain deductions to be "added back" to your taxable income. Depreciation is the most valuable — it's a non-cash expense that reduces taxable income without reducing actual cash flow. On a business with $50,000 of depreciation, a lender using add-backs assesses your income at $50,000 more than one who doesn't. Other add-backs: interest on business loans, one-off expenses (legal fees, equipment, fit-out), and personal use portions of business expenses. Ask your accountant to prepare a written add-back schedule for your application.
Time Your Application After a Strong Tax Year
Most lenders average your last 2 years of tax returns. If Year 1 was $90K and Year 2 was $130K, your assessed income is $110K. If you can wait until Year 3 (which is also $130K), your average becomes $130K. Alternatively, if Year 2 was significantly stronger, some lenders allow Year 2 only to be used where it's clearly the most recent and representative figure. A broker will identify which approach yields the highest assessed income for your specific numbers.
Switch to BAS / Alt Doc if Turnover Exceeds Tax Return Income
If your BAS-derived income figure (GST turnover × 70–80%) exceeds your taxable income, use BAS statements instead. This is entirely legal and is the purpose of alt doc products. The rate premium (0.3–0.5%) is often outweighed by the additional borrowing capacity unlocked. See our full breakdown in the BAS vs tax returns guide.
Choose a Lender with Favourable Self-Employed Policy
Not all lenders assess self-employed income the same way. Some allow single-year returns; others require 2. Some apply higher add-back categories; others don't. Some use HEM benchmarks more generously. The same application can produce $100,000 difference in assessed borrowing capacity depending on which lender calculates it. This is the highest-leverage strategy — and it's why broker knowledge of individual lender policies is so valuable for business owners.
Eliminate Existing Debt Commitments
Credit cards are assessed at 3% of the credit limit per month regardless of balance — a $20,000 credit card costs you $600/month in borrowing capacity even if the balance is zero. Cancel unused credit cards, pay down personal loans, and clear car finance before applying. This alone can add $80,000–$150,000 in borrowing capacity for business owners with multiple credit facilities.
Get Strategies 6, 7 & 8 + Your Personalised Action Plan
The final 3 strategies — including the accountant letter technique and the spousal income split — plus a free borrowing capacity projection based on your specific situation.
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Get an Accountant's Income Verification Letter
Many lenders — particularly non-bank specialist lenders — accept an accountant's letter confirming your income as an alternative or supplement to tax returns. The letter must be from a qualified CPA or CA, state your income on letterhead, and confirm your income is expected to continue. This is particularly powerful when your most recent year is significantly higher than your 2-year average — the letter can contextualise the growth and justify using the current year.
Include Your Spouse or Partner's Income
If your partner has PAYG income, including them as a co-borrower can significantly increase your combined borrowing capacity. PAYG income is assessed at full value — no add-backs needed, no averaging. A partner earning $80,000 PAYG can add $400,000–$500,000 to your combined borrowing capacity. The tradeoff is shared liability and their credit profile also becomes part of the assessment. This is worth discussing with a broker before deciding on structure.
Increase Your Deposit to Reduce LVR Tier
At lower LVRs (≤70%), many lenders apply more generous income assessment policies for self-employed borrowers. A 30% deposit can unlock products with higher income multipliers, lower rates, and fewer documentation requirements than a 10–20% deposit. If you're close to a tier threshold (e.g., 78% LVR vs 80%), it may be worth delaying to save the additional deposit to cross into the better tier.
How Much Difference Can These Make?
Here's a realistic example. A business owner with $140,000 GST turnover and $85,000 taxable income (after deductions including $35,000 depreciation and $20,000 business expenses):
- Standard bank, tax returns only: assessed at $85,000 → borrow ~$490,000
- With add-backs (depreciation): assessed at $120,000 → borrow ~$690,000
- BAS alt doc (70% factor on $140K): assessed at $98,000 → borrow ~$565,000
- Best-case (add-backs + right lender + debt cleared): assessed at $130,000 → borrow ~$750,000+
The difference between the worst and best outcome here is $260,000 in borrowing capacity — from the same income, through strategy alone. The self-employed home loans page covers the full spectrum of lenders and products we use for these scenarios.
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