Who this guide is for
Australian property investors with 2-3+ properties wanting to keep growing the portfolio despite serviceability constraints.
- Investors with 3-5 properties hitting serviceability walls
- Portfolio investors restructuring for growth
- SMSF property investors scaling through super structure
- Bangladeshi/multicultural investors building multigenerational wealth
The local picture
Most investors hit a wall at 3-5 properties — serviceability calculations stop them adding more. The solution involves lender diversification (different lenders calculate differently), structure changes (interest-only vs P&I), and sometimes SMSF additions.
How Mortgagefy helps locally
Mortgagefy works with multi-property investors regularly. We diagnose serviceability constraints, identify lenders that calculate more favourably, and structure for portfolio growth.
Free advice.
How it works — 4 simple steps
Free portfolio chat
20-minute call about your current portfolio and goals.
Diagnose serviceability ceiling
We identify what's constraining further borrowing.
Restructure or refinance
We move loans to more favourable lenders or restructure.
Add next property
Once restructured, you add the next property.
Frequently asked questions
Why does serviceability stop me at 3-5 properties?
How does lender diversification help?
Should I switch to interest-only for growth?
Can SMSF help me add another property?
How many investment properties can I realistically own?
Talk to us about scaling your portfolio
Free 20-minute portfolio strategy call.
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Multi-Property Investment Strategy
Sequential vs Simultaneous Acquisitions
How to scale your portfolio depends on cash flow and equity access.
Sequential (Buy, Hold, Refinance, Repeat)
- Property 1: Buy at $500k, hold 3 years, value grows to $600k
- Refinance Property 1: Borrow $120k on $100k equity
- Use $120k as deposit for Property 2 (total cost $600k, LVR 80%)
- Timeline: 3–4 years per property, lower serviceability risk
Simultaneous (Bridge Loan Strategy)
- Property 1 (existing): $500k, equity $100k
- Refinance Property 1, draw $100k equity = $400k new debt + $100k in hand
- Buy Property 2 immediately using $100k equity + $500k loan
- Both loans serviceability tested together (higher risk, requires strong income)
Debt Serviceability Rules (ASIC Consumer Credit Guide)
Lenders test investment property repayments at a higher interest rate than your actual rate, to stress-test you:
- Owner-occupied P&I: Tested at actual rate (e.g. 6.0%)
- Investment P&I: Tested at 8.0% (regardless of actual 6.0% rate) — safety margin
- Interest-only: Tested at 8.5%+ (converts to P&I in 5 years for repayment test)
Example: $500k investment loan at 6.0% actual = $30k/year = $2,500/month. But lender tests you at 8.0% = $40k/year = $3,333/month. You must be serviceability-approved at $3,333, not $2,500.
Positive vs Negative Gearing
Tax implications shape your long-term strategy:
- Positive gearing: Rent > loan costs. Pay tax on surplus. Reinvest or spend on personal use.
- Negative gearing: Loan costs > rent. Deduct loss against other income (salary, partner's income). Reduces tax bill.
- Strategy: High-growth markets often negative-gear (Sydney inner-west); high-yield markets positive-gear (regional)
Model your scenarios: Use our free home loan calculators to estimate borrowing capacity, repayments, and savings.