Variable Rate Investment Loans: The Pros and Cons

Your relationship with a variable rate investment loan changes as you do.

What makes sense when you're building your first rental property portfolio in your late twenties looks different when you're consolidating assets in your forties or preparing for retirement in your fifties. The structure stays the same, but how you use the flexibility shifts with your income, risk tolerance, and what you're actually trying to achieve. Since the May 2026 Budget, there's also a new layer to consider: whether you bought before or after 12 May 2026, and whether your property qualifies as a new build.

Why Variable Rates Suit Different Goals at Different Stages

A variable rate investment loan adjusts when the lender changes rates, which means your repayments move up or down without penalty. You also get access to features like offset accounts, redraw facilities, and the ability to refinance or sell without break costs. When you're younger and your income is still climbing, that flexibility lets you increase repayments as your salary grows. When you're older and managing multiple properties, it gives you room to restructure without being locked into a fixed term that no longer suits your portfolio.

Consider a buyer in Balwyn who purchases a two-bedroom apartment as their first investment property at age 28. They're earning $95,000, the rental income covers most of the interest-only repayment, and they're using an offset account to park savings from their main job. Five years later, their income has increased to $130,000, they've built up equity, and they want to buy a second property. With a variable rate loan, they can leverage that equity without refinancing penalties, increase repayments on the first loan if they choose, and adjust their strategy as their circumstances improve. The offset account also reduces the taxable interest they're charged, which matters when they're still negatively gearing against wage income.

The Tax Treatment Split: Before and After Budget Night

If you bought an established residential investment property before 12 May 2026, you can still claim the full negative gearing deduction against your wage income and access the 50% capital gains tax discount when you sell. If you bought after that date, losses from 1 July 2027 onwards can only be offset against residential rental income or capital gains, not your salary. The 50% CGT discount is also replaced with an inflation-indexed calculation and a minimum 30% tax on gains. New builds purchased after Budget night retain the choice between the old 50% discount and the new indexed method, whichever is more favourable.

This changes how you think about timing and property type. If you're in your early thirties and considering your second purchase, a new build may deliver better long-term tax treatment than an established home, even if the purchase price is slightly higher. If you're in your forties with a portfolio of properties acquired before Budget night, holding those assets becomes more valuable because they're grandfathered under the old rules.

Interest-Only Repayments in Your Twenties and Thirties

Interest-only repayments let you minimise cash outflow while you're building borrowing capacity for additional properties. Most lenders allow interest-only terms of up to five years on investment loans, which can be renewed depending on your equity position and rental income. The rental yield covers the interest, you claim the shortfall as a tax deduction (if the property qualifies under the old rules), and you free up cash to save for the next deposit.

In areas like Balwyn, where median property values sit above $1.5 million for houses and around $700,000 for units, the strategy often starts with an apartment. Rental yields on apartments tend to be higher than on houses, which makes the interest-only structure more sustainable. You're not paying down the loan, but you're also not tying up cash in principal reductions when that cash could be working harder elsewhere.

The risk is that your income doesn't grow as expected, vacancy rates increase, or interest rates rise faster than your salary. Variable rates give you the option to switch to principal and interest repayments if your situation changes, without break costs or penalties.

Principal and Interest Repayments in Your Forties and Fifties

Once your income plateaus or you're no longer chasing portfolio growth, switching to principal and interest repayments makes more sense. You start reducing the loan balance, which lowers your risk and builds equity faster. If you're planning to retire in the next 10 to 15 years, paying down debt becomes more important than tax deductions.

In our experience, investors in their mid-forties often refinance from interest-only to principal and interest once they've acquired their last property. The tax deduction is less valuable because their income is stable rather than growing, and they want to own the properties outright by retirement. A variable rate investment loan gives you that option without needing to break a fixed term or absorb penalty fees.

If you hold properties purchased before 12 May 2026, the decision to sell or hold also shifts. You still get the 50% CGT discount on those assets, so holding them through to retirement and selling strategically in low-income years can reduce your tax liability. New purchases after Budget night don't get the same treatment, which makes paying down debt on grandfathered properties a more appealing strategy than expanding the portfolio with new acquisitions under the revised rules.

Offset Accounts and Why They Matter More for High Earners

An offset account linked to your investment loan reduces the interest you're charged without technically making extra repayments. If you have $50,000 sitting in offset, you only pay interest on the outstanding loan balance minus that $50,000. For investment loans, this reduces your deductible interest, which sounds counterintuitive, but it works when you're earning a high salary and don't need the full deduction, or when you're holding cash for your next purchase.

In Balwyn, where many investors are dual-income professionals, offset accounts are common. You park bonuses, savings, or rental income from other properties in the offset, reduce your interest cost, and keep the funds accessible. It's more flexible than paying down the loan directly, because you can pull the cash out at any time without needing to apply for redraw or increase the loan balance.

Refinancing and Rate Discounts Over Time

Variable rate loans are easier to refinance than fixed loans because there are no break costs. If your lender's rate is no longer competitive, or if your loan-to-value ratio has improved and you want a better discount, you can refinance without penalty. Most investors refinance every three to five years, either to access equity, secure a lower rate, or consolidate multiple loans into a single facility.

Rate discounts depend on your loan size, LVR, and how much business you have with the lender. If you're borrowing $500,000 or more with an LVR under 80%, you'll typically get a better discount than someone borrowing $300,000 at 90% LVR. The discount also erodes over time as lenders prioritise new customers, which is why refinancing regularly makes sense.

If you bought investment property before Budget night and you're still negatively gearing against your wage income, refinancing to a lower rate increases your cash flow and keeps the strategy sustainable. If you bought after Budget night and your losses can only offset rental income, refinancing becomes more about reducing actual interest cost than maximising deductions.

Vacancy, Body Corporate, and Rental Income Assumptions

Lenders assess your borrowing capacity based on rental income, but they typically apply a haircut of 20% to account for vacancy and management costs. If the property generates $30,000 a year in rent, the lender will only use $24,000 in their serviceability calculation. This affects how much you can borrow for your next purchase, especially if you're holding multiple properties.

In Balwyn, body corporate fees on apartments can range from $3,000 to $6,000 a year depending on the building. Those costs are deductible, but they reduce your net rental income, which affects serviceability. If you're planning to buy a second or third property, choosing a low-body-corporate asset or a house instead of an apartment can improve your borrowing capacity for the next loan.

Rental yields in Balwyn tend to sit between 3% and 4% for houses, and 4% to 5% for apartments. That's lower than outer suburbs, but capital growth has historically been stronger. If you're in your thirties and focused on building equity, lower yield and higher growth makes sense. If you're in your fifties and want income to support retirement, you might look elsewhere.

Portfolio Growth Versus Debt Reduction

The decision to expand your portfolio or pay down existing debt depends on your age, income, and what you're optimising for. In your twenties and thirties, adding properties usually makes more sense than paying down debt, because leverage and capital growth do more for your net worth than principal reductions. In your forties and fifties, the equation flips. You're closer to retirement, your income is less likely to grow, and you want to reduce risk rather than increase exposure.

Variable rate loans support both strategies. You can make extra repayments when you want to reduce debt, redraw those funds if you need them for another deposit, or keep the loan interest-only and reinvest cash elsewhere. The flexibility is the point. Fixed rates lock you into a structure that might not suit your circumstances in two or three years. Variable rates let you adjust as your priorities change.

If you're managing a portfolio of properties acquired before 12 May 2026, holding those assets and paying down debt over time is now more appealing than acquiring new properties under the revised tax treatment. The grandfathered tax benefits make those properties more valuable, especially if you plan to sell in retirement when your income is lower and the CGT impact is reduced.

Talk to our team if you're weighing up whether to expand, refinance, or start paying down debt. We work with property investors across Balwyn and can walk through your current structure, your goals, and how the recent tax changes affect your specific situation. Call one of our team or book an appointment at a time that works for you.

Frequently Asked Questions