Proven Tips to Compare Investment Loan Products

Investment loan products sit across dozens of lenders with wildly different rate tiers, fees, and feature sets.

The challenge is not finding a product. It is finding the product that actually supports the structure you need, at a cost that makes the numbers work. A variable rate investor loan at one lender might sit 80 basis points above another, but the higher-rate lender may offer full offset and unlimited redraws while the cheaper option locks you out of both. If you are holding property in a portfolio growth strategy, that difference changes the outcome.

This article walks through how to assess investment loan options across rate, repayment type, features, and servicing treatment, with reference to what matters for investors holding property in Sydney.

Variable Rate Versus Fixed Rate for Investor Loans

Variable rate investor loans carry a margin above the lender's owner-occupier variable rate, typically between 20 and 60 basis points depending on loan to value ratio and whether the loan is interest only or principal and interest.

Fixed rate investor loans lock the interest rate for a set term, usually one to five years. The fixed rate margin over owner-occupier fixed rates is narrower than the variable margin at most lenders, often 10 to 30 basis points. Fixed rates remove rate movement risk during the fixed period, but most fixed products do not permit offset accounts, limit extra repayments to around $10,000 to $30,000 per year, and attract break costs if you refinance or sell before the term ends.

Consider an investor holding a unit in Parramatta purchased in early 2026 on a three-year fixed rate at 5.89 per cent. If rates drop 100 basis points during the fixed term and the investor wants to refinance to release equity for a second purchase, break costs could run into five figures depending on the remaining term and the lender's wholesale funding curve. The same investor on a variable rate with offset could have switched lenders at any time without penalty and used the offset to quarantine rental income and reduce taxable interest.

We regularly see investors split their loan, fixing a portion to manage cash flow certainty and leaving the remainder on variable with offset to retain flexibility. That structure works when you want predictable repayments on part of the loan but expect to build cash reserves or release equity within a few years.

Interest Only Versus Principal and Interest Repayments

Interest only repayments reduce the monthly outgoing, which can improve cash flow if rental income does not cover the full principal and interest repayment.

Most lenders approve interest only periods of one to five years on investor loans, after which the loan reverts to principal and interest unless you reapply and meet servicing at that time. The interest rate on an interest only investor loan is typically 20 to 40 basis points higher than the principal and interest rate at the same lender, and serviceability is assessed on the principal and interest repayment even when the loan is approved as interest only.

An investor purchasing a two-bedroom apartment in Ryde with rental income of $650 per week and a loan amount of $750,000 might face a principal and interest repayment of around $4,800 per month at current variable rates, compared to an interest only repayment of around $3,700 per month. The $1,100 monthly difference can be directed to an offset account, other investments, or held as a buffer for vacancy or maintenance. If the investor's strategy is to build equity through capital growth rather than loan reduction, interest only aligns with that intent.

Interest only is not a long-term structure. When the interest only period ends, the repayment jumps. If your income or rental yield has not improved by that point, you may not meet servicing for another interest only extension. We see this outcome when investors assume rental growth will cover the gap but vacancy rates stay elevated or body corporate fees increase faster than rents.

Offset Accounts and Redraw on Investment Loans

An offset account linked to an investment loan reduces the interest charged by offsetting the account balance against the loan balance, while keeping the funds accessible.

Not all lenders offer offset on investor loans, and those that do often restrict it to variable rate principal and interest products or charge a higher rate for the feature. Offset is valuable when you hold surplus cash from rental income, personal savings, or business income and want to reduce interest without locking the funds into the loan.

Redraw allows you to withdraw extra repayments made above the required amount. Most lenders allow redraw on variable rate investor loans, but some cap the number of redraws per year or charge a fee per transaction. Fixed rate investor loans rarely permit redraw beyond the annual extra repayment limit.

If you are holding multiple investment properties and pooling rental income into a central account, an offset linked to the highest-balance loan will reduce the most interest. For example, an investor with two properties in Sydney, one with a $900,000 loan and one with a $600,000 loan, holding $80,000 in cash, would save more by offsetting the $900,000 loan. That assumes both loans are at similar rates. If the smaller loan is on a higher rate, the interest saving calculation shifts.

Offset also preserves the deductibility of interest. Redrawing funds from an investment loan and using them for private purposes converts part of the loan to a private purpose loan, and the interest on that portion is no longer deductible. Offset avoids that problem because the funds never form part of the loan.

How Lenders Assess Servicing for Investment Loans

Lenders assess your ability to service an investment loan by applying a floor rate, usually the product rate plus a three percentage point buffer, to calculate repayments.

Rental income is included in the servicing calculation but shaded, typically at 80 per cent of the assessed rental to account for vacancy, maintenance, and periods between tenants. Some lenders shade at 75 per cent. If you are purchasing in a suburb with a known high vacancy rate, such as parts of inner Sydney with oversupply of small apartments, the lender may apply additional scrutiny to the rental assessment or valuation.

From 1 February 2026, lenders must also apply the debt-to-income cap introduced under APS 220. An investor with total borrowing of six times gross income or more will fall into the capped portion of the lender's portfolio. Most lenders remain willing to lend in that range, but some have tightened pricing or reduced maximum loan to value ratios for high-DTI applicants. If your income is $150,000 and your total borrowing across all loans, including the new investment loan, will exceed $900,000, expect the lender to model your servicing more conservatively.

Some lenders treat interest only investment loans more strictly in their servicing policy, requiring a higher income buffer or capping LVR at 80 per cent even when LMI is available to 90 per cent. Others are more flexible if you have a strong repayment history and low existing debt. Access to investment loan options from banks and lenders across Australia means you can compare how different credit policies treat your scenario.

Rate Discounts and How They Are Structured

Most lenders publish a standard variable rate and offer discounts based on loan amount, LVR, and whether you hold other products with the lender.

A rate discount might start at 0.70 per cent for a loan amount above $500,000 and increase to 1.00 per cent for a loan above $1,000,000. LVR-based discounts typically favour borrowers below 70 per cent LVR, with smaller discounts offered between 70 and 80 per cent, and minimal or no discount above 80 per cent. Some lenders also offer a package discount if you pay an annual fee, usually between $300 and $400, which unlocks a larger rate reduction and fee waivers on transaction accounts or credit cards.

Rate discounts are not locked. Lenders can reduce the discount on your existing loan at any time by writing to you, which increases your interest rate even if the underlying standard variable rate has not moved. We regularly see lenders reduce discounts on back-book customers while offering larger discounts to new borrowers. That is why investment loan refinancing remains relevant even when the cash rate is stable.

If you are comparing two lenders, one at 6.10 per cent with no annual fee and one at 5.95 per cent with a $395 annual fee, the break-even point is around $26,000 in loan balance per 0.01 per cent of rate difference. On a $750,000 loan, the 15 basis point saving is worth around $1,125 per year, so the package fee is justified. On a $400,000 loan, the saving is $600, and the package fee erodes most of the benefit.

Claimable Expenses and Tax Treatment of Loan Costs

Interest on borrowings used to acquire or hold an investment property is deductible to the extent the property is rented or genuinely available for rent.

Loan establishment fees, valuation fees, and settlement costs on an investment loan are also deductible, either in the year incurred or over five years depending on the amount. Ongoing loan fees such as annual package fees or account-keeping fees are deductible in the year they are charged. Lenders Mortgage Insurance premiums paid on an investment loan are deductible over five years or the term of the loan, whichever is shorter.

If you refinance an investment loan, the break costs on a fixed rate loan, discharge fees, and new establishment fees are all deductible. That makes the after-tax cost of refinancing lower for investors than for owner-occupiers, where none of those costs are claimable.

From 1 July 2027, the negative gearing rules change for residential investment properties acquired on or after 7:30pm AEST on 12 May 2026. Net rental losses on those properties, other than eligible new builds, can only be offset against other residential rental income or carried forward. They cannot be offset against salary or wages. Properties held before that date, or under contract before that date, continue under the existing rules and can be negatively geared in the traditional sense until sold. If you are purchasing an established property in Sydney now, you are acquiring under the new regime, and the structure of your loan, the amount of interest, and your rental yield all need to be assessed with that tax treatment in mind.

Portability and the Ability to Add Security

Portability allows you to transfer your investment loan to a different property without refinancing, which can save discharge fees, application fees, and valuation costs.

Not all lenders offer portability, and those that do usually require the new property to meet their current credit policy and valuation standards. Portability is useful if you sell one investment property and purchase another within a short window, particularly if you are on a fixed rate and want to avoid break costs. Some lenders allow you to port a fixed rate loan to a new property and keep the same rate and term, while others will reprice the loan at the current fixed rate.

The ability to add security to an existing loan, rather than taking out a new loan, simplifies structure when you are building a portfolio. If you own one property with $200,000 in equity and want to purchase a second property using that equity, some lenders will allow you to increase the limit on the existing loan and add the new property as additional security. Others require a separate loan for each property. A single loan across multiple securities can reduce the number of offset accounts and annual fees, but it also means you cannot release one property from the loan without discharging the entire facility.

When you are holding multiple properties, the structure you establish at loan one will affect how you refinance, release equity, or sell down later. We see investors lock themselves into structures that made sense at purchase but create problems when they want to access equity release or move one property to a different lender.

If you are ready to compare loan products for your next investment property or want to review whether your current loan still fits your strategy, call one of our team or book an appointment at a time that works for you.

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