The Easiest Way to Compare Investment Loans

Most lenders advertise headline rates, but those numbers reveal very little about whether a product will actually support the way you intend to use it.

Investment loan comparison is not about finding the lowest advertised rate. It requires comparing structure, offset availability, repayment flexibility and policy settings that either constrain or enable portfolio growth over time. The difference between a product chosen on rate alone and one matched to your strategy can amount to tens of thousands of dollars in opportunity cost and flexibility lost.

What Makes Investment Loan Comparison Different to Owner-Occupied Lending

Investment loans are assessed differently by lenders and regulated under separate prudential settings. APRA applies a separate debt-to-income cap to investor lending, limiting the proportion of loans at DTI of six times or greater, and lenders typically apply tighter serviceability buffers and higher interest rates to investor borrowing than to owner-occupied finance. That creates variation in how much each lender will approve and on what terms, even when you present identical income and deposit details.

Consider an investor purchasing a two-bedroom apartment in Brunswick East with rental income of $550 per week. One lender may assess 80 per cent of that income for serviceability, while another uses 100 per cent. A third may discount it to 70 per cent if the property is zoned commercial on the ground floor. The loan amount you can access, and the rate you pay, will vary significantly across those three scenarios.

You need to compare both the product features and the policy lens each lender applies to your specific property type and income structure. Headline rates published on comparison sites do not account for these differences.

Interest Rate Structure and the Role of Offset Accounts

Variable rate investment loans with full offset accounts allow you to park surplus cash against the loan balance and reduce interest without losing access to those funds. That flexibility is valuable when managing uneven rental income, vacancy periods or lumpy tax liabilities.

Some lenders restrict offset accounts to owner-occupied products or charge higher rates on investor loans that include offset. Others offer offset at no additional cost but impose minimum balance requirements or caps on the offset amount. You need to compare these conditions alongside the rate itself.

Fixed rate products typically offer lower rates than variable over the fixed period but remove offset functionality and limit extra repayments. For investors relying on cashflow flexibility or planning to use equity for further purchases within the fixed term, that loss of access can outweigh the rate saving. Investment loan refinance becomes necessary if the fixed structure no longer suits your strategy, and break costs can be substantial.

How Lenders Assess Rental Income and Borrowing Capacity

Lenders apply a rental income assessment rate, known as a shading factor, that discounts the gross rent to account for vacancy, arrears and management costs. Most lenders use 80 per cent, but the range extends from 70 per cent to 100 per cent depending on the property type, location and portfolio size.

In Brunswick East, where vacancy rates for well-located two-bedroom units typically sit below 2 per cent, an investor might assume full rental income would be recognised. In practice, even low-vacancy suburbs are assessed using each lender's blanket shading policy unless the property qualifies for a specific carve-out.

A property generating $28,600 per year in gross rent will be assessed as $22,880 under an 80 per cent shading policy or $20,020 under 70 per cent shading. That difference of $2,860 per year reduces your borrowing capacity by approximately $55,000 at a 5 per cent assessment rate, which can mean the difference between securing the loan amount you need or falling short.

You also need to compare how each lender treats negative gearing. Under the grandfathering provisions in the Treasury Laws Amendment (Tax Reform No. 1) Act 2026, properties held before 7:30pm AEST on 12 May 2026 retain full negative gearing benefits. For properties acquired after that time, net rental losses are quarantined from 1 July 2027 unless the dwelling is an eligible new build. Some lenders have already adjusted serviceability models to reflect reduced tax benefits for non-grandfathered properties, while others have not yet updated their systems. That inconsistency creates variation in borrowing capacity across lenders even when all other inputs are identical.

Comparing Interest-Only Terms and Principal and Interest Flexibility

Interest-only repayments reduce monthly outgoings and improve cashflow, which is why many investors favour them during the acquisition phase. Most lenders offer interest-only terms of one to five years on investment loans, after which the loan reverts to principal and interest unless you request an extension.

Not all lenders allow extensions, and those that do may require a new valuation, updated income evidence and a reassessment of serviceability. If your circumstances have changed or property values have declined, the extension may be declined and you will be required to switch to principal and interest repayments at that point. That can add several hundred dollars per month to your repayment and reduce your capacity to service additional borrowing.

When comparing products, confirm the initial interest-only term, the lender's policy on extensions, and whether the loan structure allows you to make principal repayments voluntarily without penalty. Investors building portfolios often prefer the option to pay down principal when cashflow allows but revert to interest-only when acquiring the next property. That flexibility is not standard across all products.

Policy Settings That Affect Portfolio Growth and Equity Release

Each lender applies a maximum exposure limit per borrower, which caps the total debt they will hold against you regardless of security. For investors acquiring multiple properties, you may reach that limit with one lender before you exhaust your serviceability. When that happens, you need access to a second or third lender to continue building the portfolio.

Lenders also vary in their willingness to lend against properties with certain characteristics. In Brunswick East, older-style flats with shared laundries or external bathrooms, small lot sizes below 300 square metres, and properties on main roads such as Nicholson Street may be subject to higher loan-to-value ratio restrictions or outright declines from some lenders. Others will lend but apply loan-to-value ratio caps of 70 per cent or 75 per cent instead of the standard 80 per cent.

If you intend to leverage equity from an existing property to fund the next purchase, the loan-to-value ratio cap applied by your current lender determines how much equity you can access. A lender capping investment lending at 80 per cent loan-to-value ratio will release less equity than one willing to lend to 90 per cent, even after accounting for Lenders Mortgage Insurance. When comparing investment loans, ask what loan-to-value ratio applies to equity release for further investment purchases, not just the initial purchase loan-to-value ratio.

Rate Discounts, Ongoing Fees and the Real Cost of the Product

Advertised rates are almost always higher than the rate a broker can negotiate. Lenders offer tiered rate discounts based on loan amount, loan-to-value ratio and whether the loan includes offset or packaged insurance products. A discount of 0.40 per cent to 0.70 per cent is common on investment lending, but the size of the discount varies by lender and is not published.

Some lenders also charge ongoing monthly fees of $10 to $15 per account, annual package fees of $300 to $400, and higher application fees for investment lending. When comparing products, calculate the effective annual cost including all fees and apply the discount to the advertised rate before making a decision.

In our experience, investors who compare only the headline rate without adjusting for available discounts and fees often end up paying more than necessary or selecting a product that appears cheaper on paper but costs more once fees are included.

How to Structure Comparison When You Own Property in Multiple Locations

Investors with properties in different states or suburbs need to compare how each lender assesses postcode risk and cross-collateralisation. Some lenders apply postcode restrictions that limit exposure to certain high-density areas or regional centres, which can affect approval even when serviceability is sound.

Cross-collateralisation, where multiple properties secure a single loan facility, reduces flexibility because you cannot sell one property without the lender's consent to release that security. Most brokers recommend separate loans for each property to maintain independence, but not all lenders support that structure. When comparing products, confirm whether the lender allows standalone security for each property and whether they will register multiple mortgages without requiring cross-collateralisation as a condition of approval.

Understanding borrowing capacity across lenders is particularly important when you plan to acquire multiple properties over a short period, as each lender's appetite for portfolio lending and their internal exposure limits will determine how far you can scale before needing to introduce a new funder.

Local Considerations for Brunswick East Investors

Brunswick East sits within the City of Yarra, which has seen consistent demand from renters due to proximity to the CBD, Merri Creek trails and local retail precincts along Lygon Street. The suburb has a mix of older-style flats, renovated townhouses and newer medium-density developments, and lender appetite varies across those property types.

Older flats, particularly those built in the 1960s and 1970s without car parking, may require a larger deposit or attract higher rates from certain lenders. Newer developments completed within the last two years may be subject to additional scrutiny if the building has a high proportion of investor owners or if the developer retains unsold stock. Some lenders apply loan-to-value ratio caps or decline lending entirely in buildings with more than 50 per cent investor ownership or where the body corporate has flagged defects or special levies.

When comparing investment loan options for Brunswick East property, confirm each lender's position on the specific building or property type before proceeding with a formal application. A broker with access to lender policy documents can identify which funders will support your property without restriction and which will impose additional conditions.

The ability to compare investment loan products from banks and lenders across Australia is one of the main reasons investors engage a broker rather than approaching a single bank directly. No single lender offers the optimal combination of rate, features and policy settings for every investor, and product suitability changes as your portfolio grows.

Call one of our team or book an appointment at a time that works for you.

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