Fixed Rate Investment Loans: What Not to Lock In

A fixed rate on an investment property loan locks in your repayments for a set period, which can protect your cash flow if rates rise. The question is whether that certainty is worth the trade-offs, particularly if your investment strategy involves refinancing, accessing equity, or selling within a few years.

For investors in Melbourne, where property values and rental yields vary significantly between suburbs, the decision often comes down to how much flexibility you need versus how much rate movement you can absorb. A fixed rate investment loan removes the risk of rate rises, but it also removes your ability to make certain changes without penalty.

Why Investors Choose Fixed Rates

Fixed rates appeal to property investors who want predictable repayments and protection from rate increases. If you're negatively geared and relying on rental income to cover part of your loan, a sudden rate rise can push your monthly shortfall higher than planned. Locking in a rate removes that uncertainty.

Melbourne's rental market can be uneven. Inner suburbs like Brunswick and Richmond typically have lower vacancy rates and stronger rental demand, while outer areas may experience longer vacancy periods. If you're holding a property in an area with higher turnover or seasonal demand, knowing your exact repayment amount each month makes budgeting more predictable.

Fixed rates also suit investors who are building a portfolio and need to demonstrate stable serviceability when applying for additional loans. Lenders assess your ability to service debt based on your current commitments, and a fixed rate can make those commitments easier to forecast.

What You Can't Do on a Fixed Rate

Most fixed rate investment loans restrict your ability to make extra repayments, access redraw, or refinance without incurring break costs. If you're planning to use equity from your investment property to fund another purchase, or if you want to pay down the loan faster when rental income improves, a fixed rate can limit those options.

Consider an investor who bought a unit in Southbank with a three-year fixed rate. Two years in, they wanted to refinance to release equity for a second property. The lender charged break costs equivalent to several thousand dollars because fixed rate funding costs hadn't moved in line with market rates. The investor could proceed, but the cost reduced the equity available for the next deposit.

Break costs are calculated based on the difference between the fixed rate you're paying and the current wholesale rate the lender can earn by redeploying that money. If rates have dropped since you fixed, the lender loses income by releasing you early, and you pay the difference. If rates have risen, break costs are usually minimal or zero.

This is why fixed rates suit investors who are confident they won't need to refinance, sell, or access equity before the fixed term ends. If your strategy involves active portfolio growth or regular restructuring, a variable rate or split loan often gives you more room to move.

Split Rate Structures for Investment Loans

Many investors use a split loan structure, fixing part of the loan and keeping part variable. This approach balances rate protection with flexibility. You might fix 50% or 60% of the loan to stabilise most of your repayments, while keeping the rest variable so you can make extra payments, redraw, or refinance without triggering break costs on the entire balance.

A split structure also lets you take advantage of rate movements in both directions. If variable rates drop, the unfixed portion benefits immediately. If they rise, the fixed portion protects you. The exact split depends on your risk tolerance and how likely you are to need access to equity or refinancing options during the fixed period.

For investors holding property in areas like Glen Waverley or Box Hill, where demand from families and international students can drive both capital growth and rental stability, a split structure can support long-term holding while still allowing tactical refinancing when opportunities arise.

Interest-Only Repayments and Fixed Rates

Most investment loans offer the option to make interest-only repayments for a set period, typically up to five years. This reduces your monthly repayment and can improve cash flow, particularly if the property is negatively geared. Combining interest-only repayments with a fixed rate gives you predictable, lower repayments during the interest-only term.

The limitation is that interest-only periods eventually end, and your loan reverts to principal and interest repayments. If your fixed rate term and interest-only term don't align, you may end up with a higher repayment when the interest-only period expires, even if your fixed rate hasn't changed. Planning both terms together avoids that mismatch.

Investors using interest-only structures often do so to maximise tax deductions while freeing up cash flow for additional investments. If that's your strategy, a fixed rate on an interest-only loan can lock in your deductions and repayments for the short to medium term, but it's important to plan for what happens when either term expires.

How the 2026 Budget Changes Affect Fixed Rate Investment Loans

From 1 July 2027, negative gearing deductions for established residential properties purchased after 12 May 2026 will only be deductible against rental income or capital gains from residential property, not against other income like wages. Excess losses can be carried forward. The 50% capital gains tax discount will also be replaced with an inflation-based discount and a minimum 30% tax on gains for properties acquired after Budget night.

If you're buying an established property in Melbourne now and fixing your rate, your tax treatment will change in July 2027, regardless of your loan structure. This means the cash flow benefit of negative gearing will be reduced if you were previously offsetting losses against salary or business income. A fixed rate won't change that outcome, but it does give you certainty over your repayments while the tax treatment adjusts.

New builds purchased after Budget night retain the 50% CGT discount and full negative gearing deductions, which makes them more attractive from a tax perspective. If you're considering a fixed rate investment loan for a new apartment in areas like Docklands or Footscray, where new supply is concentrated, the tax treatment remains unchanged under the new rules.

Speaking to a tax adviser or accountant alongside your mortgage broker ensures your loan structure aligns with the updated tax settings, particularly if you're holding the property for capital growth rather than short-term cash flow.

When to Refinance a Fixed Rate Investment Loan

If your fixed term is ending, you'll usually revert to a variable rate unless you choose to fix again or refinance. This is a useful point to review your loan, compare rates, and check whether your current lender is still offering you a rate that reflects your borrowing position and the current market.

Investors who fixed during a low-rate period and are now coming off that term may find variable rates have risen, making a new fixed rate more appealing. Alternatively, if rates have dropped or your loan balance has reduced significantly, refinancing to a different lender or product might offer a lower rate or additional features like offset accounts or redraw.

Melbourne investors holding property in growth areas like Werribee, Craigieburn, or Pakenham may also have seen capital growth that improves their loan-to-value ratio. A lower LVR can qualify you for a lower rate or allow you to remove Lenders Mortgage Insurance if it was originally paid. Refinancing at the end of a fixed term lets you capture that benefit without incurring break costs.

Choosing Between Fixed and Variable for Your Next Investment Property

The right structure depends on your investment timeline, your tolerance for rate movement, and whether you plan to grow your portfolio actively. Fixed rates suit investors who want certainty and aren't planning major changes to their loan structure for several years. Variable rates suit investors who want flexibility to refinance, access equity, or make extra repayments as rental income improves.

If you're buying in Melbourne and unsure which structure fits your strategy, working with a mortgage broker who understands investment property finance and the way different lenders structure their fixed and variable products can help you match the loan to your goals. A broker can also model the impact of different rate scenarios on your repayments and tax position, so you're making the decision based on your specific circumstances rather than a general assumption about where rates are heading.

Fixed rate investment loans can be a useful tool for managing cash flow and protecting against rate rises, but they work when the structure fits your strategy. If you need flexibility, a variable rate or split loan may serve you longer.

If you're considering a fixed rate investment loan or refinancing an existing property, call one of our team or book an appointment at a time that works for you.

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