When to Compare Investment Loans & What to Look For

Not every investment loan is priced or structured the same way. A borrower looking to acquire a second property in South Perth will encounter different investor interest rates, policy overlays and serviceability treatment depending on the lender, even when the advertised rate appears identical.

Why Lenders Price and Assess Investment Loans Differently

Lenders apply separate risk weightings to investor lending, which affects both the rate you pay and the loan amount they will approve. Most institutions add a margin to their investor interest rates compared to owner-occupier products, typically 0.20 to 0.60 percentage points. Beyond the rate, lenders differ in how they treat rental income, apply debt-to-income limits and assess portfolio risk when you hold more than one property.

Consider a borrower refinancing an existing investment property on the Esplanade while also holding an owner-occupied mortgage. One lender may apply an 80 per cent shading factor to rental income and cap total borrowing at six times gross household income under the February debt-to-income settings. Another may accept 100 per cent of market rent where a lease and property management agreement are in place, and assess the portfolio using a lower serviceability buffer. The difference in approved loan amount can exceed $150,000 on the same income and deposit.

Interest Rate Structure: Variable, Fixed or Split

Variable rate products allow you to make extra repayments and access offset accounts, which can reduce taxable income if structured as interest-only with surplus cash held in offset rather than paid down. Fixed rate products lock in a rate for one to five years but typically restrict additional payments and do not offer offset, meaning you lose flexibility if rental yields exceed expectations or you want to pay down debt.

A split structure allocates a portion of the loan to fixed and the remainder to variable. In our experience, investors holding properties in areas with stable rental demand such as South Perth often split 50 to 70 per cent variable to retain offset and redraw access, fixing the remainder to manage rate risk during the first few years of ownership when cash flow is tightest.

Interest-Only Repayments and Cash Flow Management

Interest-only repayments reduce the monthly outgoing, which improves serviceability and allows you to direct surplus cash toward acquiring additional property or building an offset balance. Most lenders approve interest-only terms of one to five years on investment loans, with the option to extend subject to equity position and rental coverage at the time of renewal.

From 1 July 2027, interest on loans secured against properties acquired after 7:30pm AEST on 12 May 2026 will remain deductible, but net rental losses on those properties cannot be offset against salary or business income unless the dwelling qualifies as an eligible new build. The ability to minimise principal repayments and maximise interest deductions remains relevant, but the value of negative gearing as a tax strategy is now limited to new construction for recent acquisitions.

Loan to Value Ratio and Lenders Mortgage Insurance

Most lenders will finance investment property purchases up to 90 per cent loan to value ratio, though some cap investor lending at 80 or 85 per cent depending on postcode, property type or total portfolio exposure. Borrowing above 80 per cent typically attracts Lenders Mortgage Insurance, which is calculated as a one-off premium and can be capitalised into the loan amount.

LMI premiums vary between insurers and lenders. A borrower seeking 90 per cent finance on a two-bedroom apartment near the Swan River may face an LMI premium of $15,000 with one lender and $22,000 with another, even when the property, loan amount and borrower profile are identical. The premium is a claimable expense over five years for investment loans settled before 1 July 2027, or deductible in the year incurred for loans settled from that date under transitional tax rules.

How Rental Income is Assessed for Serviceability

Lenders shade rental income to account for vacancy, maintenance and periods between tenancies. Shading factors range from 70 to 100 per cent of market rent, with most applying 80 per cent. Some lenders accept 100 per cent of contracted rent where a signed lease and property management agreement are provided at the time of application.

The difference in serviceability treatment is significant. A property generating $650 per week in rent will add $542 per week to income at 80 per cent shading, or $650 per week at 100 per cent. Over a year, the higher figure increases annual assessable income by $5,616, which can lift approved borrowing capacity by $30,000 to $40,000 depending on the lender's serviceability buffer and debt-to-income cap.

Offset Accounts, Redraw and Tax Efficiency

An offset account linked to an investment loan allows you to park surplus cash and reduce interest charged without making additional principal repayments. Because the loan balance remains unchanged, the full interest expense stays deductible. Redraw facilities allow you to withdraw extra repayments previously made, but redrawing funds can create complexity if those funds are used for private purposes, as the interest attributable to the redrawn amount may not be deductible.

Investors holding multiple properties often structure their owner-occupied debt with principal and interest repayments and their investment loans as interest-only with offset. This approach maximises the deductible interest and minimises non-deductible debt over time.

Rate Discounts and Negotiation Between Lenders

Advertised investment loan interest rates are rarely the final rate offered. Lenders provide rate discounts based on loan amount, loan to value ratio, whether you hold other products with the institution, and the strength of your application. Discounts typically range from 0.10 to 0.80 percentage points below the standard variable rate.

When comparing investment loan options, the discount available is often more important than the advertised rate. A lender with a higher standard variable rate but a larger discount may deliver a lower ongoing rate than a competitor with a lower headline figure and minimal discount. Refinancing an existing portfolio to access a higher discount can reduce annual interest costs by several thousand dollars without changing the loan amount or structure.

Debt-to-Income Caps and Multi-Property Portfolios

From February, lenders apply a debt-to-income cap that limits total borrowing to a multiple of gross household income. The cap is set at six times income for 80 per cent of new investor loans, with 20 per cent of the portfolio allowed above that threshold. The cap is assessed separately from the serviceability buffer and can restrict borrowing even when cash flow comfortably supports repayments.

Borrowers with multiple investment properties are more likely to reach the debt-to-income cap before reaching the serviceability limit. In a scenario where a borrower holds two properties and applies for finance on a third, one lender may decline due to total debt exceeding six times income, while another may approve the loan by allocating it within their permitted 20 per cent allocation above the cap. Access to a panel of lenders becomes critical when portfolio growth is the objective.

Comparing Policy Overlays on Apartment and Unit Purchases

Some lenders apply additional restrictions to investment loans secured against apartments, particularly in postcodes with high investor concentration or off-the-plan supply. Overlays may include reduced maximum loan to value ratio, higher interest rate loadings, or outright exclusion of certain developments. These restrictions are not disclosed on rate sheets and vary significantly between institutions.

A two-bedroom apartment in South Perth may be financed at 90 per cent by one lender and capped at 80 per cent by another, with no difference in the property's valuation or rental yield. When comparing investment loan options, understanding each lender's postcode and property type policy is as important as comparing the rate and loan features.

When Refinancing an Investment Loan Improves Return

Refinancing an investment property loan makes sense when a lower rate, better loan features or access to equity will improve cash flow or support portfolio growth. Borrowers who secured investment finance before recent rate increases may be paying a variable interest rate 1.50 to 2.00 percentage points higher than the lowest currently available. On a loan amount of $500,000, a 0.50 percentage point reduction saves $2,500 per year in interest.

Beyond rate, refinancing can shift a loan from principal and interest to interest-only, add an offset account, or release equity for the deposit on a subsequent purchase. The decision to refinance should weigh the interest saving or feature improvement against the cost of discharge, application and valuation fees, which typically total $1,200 to $2,000.

Status Home Loans has access to investment loan products from lenders across Australia, including those with higher rental income shading, lower debt-to-income sensitivity and flexible policy settings for South Perth and metro property types. Call one of our team or book an appointment at a time that works for you.

Frequently Asked Questions