Income stability and shift-based earning patterns put midwives in a strong position to build an investment property portfolio.
Portfolio growth relies on structuring each loan to preserve borrowing capacity for the next purchase. Lenders assess each application using the same serviceability buffer and debt-to-income settings, so the way you structure interest payments, document rental income and release equity determines whether you can acquire a second or third property. The decisions you make on the first loan directly affect what is available for the second.
Loan Structure That Protects Future Borrowing Capacity
Interest only repayments reduce your monthly outgoings and leave more assessable income available when you apply for the next investment loan. Lenders calculate serviceability using the rate on your existing debts plus the 3 percentage point buffer, so lowering those repayments by selecting an interest only period means you can service a larger total loan amount across your portfolio.
Consider a midwife who purchases an investment property with an interest only loan for five years. Monthly repayments sit around half what they would be on principal and interest, leaving an extra few hundred dollars in assessable income each month. When that midwife applies for a second property two years later, the lender runs serviceability on the lower repayment figure, not the principal and interest equivalent. That difference can be enough to meet the debt-to-income cap and approve the second loan, particularly if total borrowing sits close to six times income.
Interest only periods typically run for one to five years, after which the loan reverts to principal and interest unless you refinance the investment loan or negotiate an extension. Locking in interest only terms on each property as you acquire it keeps your assessed commitments lower during the accumulation phase.
Equity Release and Leverage Across Properties
Equity in your owner-occupied home or an existing investment property can fund the deposit and costs for the next purchase without requiring you to save again from take-home pay. Lenders will typically allow you to borrow up to 80 per cent of a property's value without Lenders Mortgage Insurance, so any equity above that threshold becomes available capital.
A property held for three years may have increased in value or had its loan balance reduced through repayments. The difference between the current value and the amount owed is your equity. Releasing a portion of that equity by increasing the loan amount gives you funds for a deposit on the next property. The key is ensuring the loan-to-value ratio stays at or below 80 per cent to avoid LMI, which adds cost and reduces the funds available for acquisition.
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Midwives with LMI waivers may be able to borrow beyond 80 per cent on an owner-occupied property and still avoid the insurance premium, making equity release more accessible earlier in the wealth-building phase. That waiver does not typically extend to investment lending at the same loan-to-value ratio, so structuring your first property as owner-occupied before converting it to investment use or purchasing a second property as an investment can maximise what you extract.
Rental Income and Serviceability Calculation
Lenders use rental income to offset the cost of holding an investment property when they assess your borrowing capacity. Most lenders apply a shading factor, accepting only 70 to 80 per cent of the rental income you receive, to account for vacancy periods and maintenance costs. The rental figure they use comes from a valuation or a signed lease, so having tenants in place before you apply for the next loan improves your serviceability position.
If you are acquiring multiple properties in close succession, rental income from the first property will be included in your second application. A property generating rental income of $500 per week will add around $350 to $400 per week to your assessable income after shading, depending on the lender. That income partly offsets the interest cost of the first loan, reducing your net commitments and leaving room under the debt-to-income cap for the second mortgage.
Some lenders require three months of rental history before they include the income in their assessment. Others will accept a signed lease or a rental appraisal from a licensed agent. Knowing which lenders accept which evidence lets you sequence applications to maintain momentum without waiting for rental history to accumulate.
Negative Gearing Rules from July 2027
Properties acquired from 12 May 2026 onward will be subject to quarantined rental losses from 1 July 2027 unless they meet the eligible new build definition. That means any shortfall between rental income and deductible expenses, including interest, can only be offset against other residential rental income or carried forward. It cannot be offset against your midwifery salary.
Properties you already hold at 12 May 2026, or those under contract at that date, remain under the existing negative gearing rules for as long as you own them. If you are building a portfolio now, each property acquired before that date retains the ability to offset losses against your employment income indefinitely. Properties acquired after that date will not provide the same immediate tax benefit unless they are newly constructed dwellings that increase the total dwelling count on the site.
The quarantine does not prevent you from claiming deductions. It delays when those deductions can be used. Rental losses still reduce tax on future rental profits or capital gains when you sell, but they no longer reduce your annual income tax during the holding period unless you own other rental properties generating positive income. For midwives acquiring their second or third property after mid-2026, the tax benefit shifts from annual cash flow to long-term wealth accumulation.
Loan Serviceability Under the Debt-to-Income Cap
From 1 February 2026, lenders can approve no more than 20 per cent of new investment loans at a debt-to-income ratio of six times or greater. That cap applies separately to the investor loan portfolio, so it does not affect your owner-occupied borrowing, but it does mean that lenders assess investor applications more conservatively once your total debt approaches six times your gross income.
A midwife earning $95,000 per year can borrow up to $570,000 in investment debt before reaching the six times threshold. If rental income offsets part of the loan cost, your net debt-to-income ratio may sit below six even when gross borrowing exceeds it, but not all lenders calculate the ratio that way. Some apply the cap to total debt regardless of rental income, while others net off the shaded rental figure. Knowing which approach your lender uses determines how much you can borrow across your portfolio.
If your total borrowing will exceed six times income, you need a lender with capacity remaining in their 20 per cent allocation, or you need to structure your loans to reduce the ratio before you apply. Paying down part of an existing loan, increasing your income through additional shifts, or selecting properties with higher rental yields all move the ratio in your favour.
Fixed Rate and Variable Rate Allocation
Splitting each investment loan between a fixed rate portion and a variable rate portion gives you repayment certainty on part of the debt while retaining the flexibility to make extra repayments or access redraw on the variable component. Fixed rates protect you from rate increases during the fixed period, but they lock you into that rate even if the market moves lower.
Midwives acquiring multiple properties often fix a portion of each loan to smooth cash flow and keep the tax-deductible interest cost predictable. The variable portion allows extra repayments if you have surplus income, or it can be drawn down to cover costs on the next acquisition if the loan includes a redraw facility. That structure works particularly well when you are using equity from one property to fund the deposit on the next.
Some lenders allow offset accounts on the variable portion of an investment loan, though the feature is less common than on owner-occupied lending. An offset account linked to an investment loan does not reduce your deductible interest, but it does reduce the interest you pay, lowering your monthly outgoings and improving cash flow during the accumulation phase.
Why Loan Structure Determines Portfolio Size
Two midwives earning the same income and purchasing properties at the same price will end up with different sized portfolios depending on how they structure their loans. The midwife who selects interest only repayments, maximises rental income recognition, and uses a lender that nets rental income against the debt-to-income cap will be able to borrow more in total than the midwife who selects principal and interest repayments, waits to document rental history, or uses a lender that applies the cap to gross debt.
Each decision compounds. Selecting principal and interest on your first investment property might reduce your borrowing capacity for the second by $80,000 to $120,000, depending on your income and the size of the first loan. That reduction might mean you can afford a second property but not a third, or it might mean you need to wait another two years to build equity before the numbers work.
Accessing investment loan options from multiple lenders before you make those decisions ensures you know which structure will leave the most capacity for future growth. Not all lenders assess rental income the same way, and not all lenders offer interest only periods on investment loans to midwives at the same loan-to-value ratio. Comparing options at each stage of the portfolio build lets you choose the structure that supports your long-term plan, not just the immediate purchase.
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Frequently Asked Questions
Can I use equity from my home to buy multiple investment properties?
You can release equity from an owner-occupied or investment property to fund deposits on additional purchases, provided your loan-to-value ratio remains at or below 80 per cent to avoid Lenders Mortgage Insurance. Midwives with LMI waivers may access equity at higher ratios on owner-occupied properties.
How does rental income affect my borrowing capacity for a second investment property?
Lenders include 70 to 80 per cent of rental income in your serviceability assessment to account for vacancy and maintenance. That shaded rental income offsets the cost of holding the first property, leaving more borrowing capacity for the second loan.
Do negative gearing changes affect properties I already own?
Properties held at 12 May 2026, or under contract at that date, remain under existing negative gearing rules indefinitely. Only properties acquired after that date will have rental losses quarantined from 1 July 2027, unless they are eligible new builds.
What is the debt-to-income cap for investment loans?
Lenders can approve no more than 20 per cent of new investment loans at a debt-to-income ratio of six times gross income or greater. This cap applies separately to investment lending and does not affect owner-occupied borrowing.
Should I choose interest only or principal and interest for investment loans?
Interest only repayments lower your monthly commitments and preserve borrowing capacity for future acquisitions. They are typically used during the portfolio accumulation phase, then refinanced or converted to principal and interest once you stop acquiring properties.
