Everything You Need to Know About Variable Rate Loans

A variable rate investment loan lets you claim tax deductions on the interest while keeping the flexibility to make extra repayments or reduce your loan with an offset account.

For Queensland public sector employees with stable income, this combination gives you control over your borrowing costs without locking yourself into a rate that might not suit your circumstances if your financial position changes. The tax treatment and offset features make variable rates worth considering alongside fixed options when you're setting up investment property finance.

How Variable Rates Respond to Cash Rate Changes

Your variable rate moves up or down when lenders adjust their rates, usually in response to Reserve Bank cash rate decisions. The lender decides how much of a rate change to pass on and when, so your repayment amount can shift from month to month.

Consider a public servant who borrowed to buy a unit in Toowong. When the lender lifted rates by 0.25%, their monthly repayment increased by around $60. Six months later, when rates dropped by 0.15%, the repayment fell by about $35. The rate changes didn't match exactly, and the timing varied between lenders, but the overall direction followed broader rate movements.

Why Offset Accounts Lower Your Interest Bill

An offset account is a transaction account linked to your investment loan. The balance in that account reduces the amount of interest charged on the loan, calculated daily.

If you have a loan balance of $450,000 and $30,000 sitting in the offset account, you only pay interest on $420,000. That $30,000 isn't locked away or earning interest itself, but it's reducing the interest you're charged without affecting your ability to access the funds. You can deposit your salary, rental income, or any other funds into the offset account and withdraw them when needed. The tax benefit remains intact because you're not making an actual repayment, you're just lowering the interest calculation.

Interest Only Repayments and Cashflow Management

Interest only repayments mean you're only paying the interest portion each month, not reducing the loan balance. This option is common on investment loans because it keeps your repayments lower and maximises the tax deduction you can claim.

The loan balance stays the same during the interest only period, which is typically one to five years. After that period ends, the loan converts to principal and interest unless you apply to extend the interest only term. Some lenders allow one extension, others allow multiple extensions depending on your circumstances and the loan to value ratio.

If you're holding an investment property for capital growth rather than relying on rental income to cover costs, interest only repayments reduce the amount you need to contribute each month while the property appreciates. The rental income covers part of the interest, you claim the shortfall as a tax deduction, and the loan balance remains available to offset with surplus funds in your offset account.

Tax Deductions on Investment Loan Interest

Interest charged on a loan used to purchase an income-producing property is a claimable expense. You can deduct the full amount of interest charged during the financial year, whether you're on interest only or principal and interest repayments.

If you use an offset account, the interest deduction is based on the reduced interest amount you're actually charged. So if your loan balance is $450,000 but you have $30,000 in the offset, you only claim a deduction on the interest calculated on $420,000. The offset reduces your interest cost and your deduction equally.

Keep the loan purpose clear. If you redraw funds from the loan for non-investment purposes, that portion of the interest is no longer deductible. The loan needs to remain connected to the income-producing asset for the deduction to apply.

Variable Rate Loans After the Federal Budget Changes

From 1 July 2027, negative gearing rules change for established residential properties purchased after Budget night in May. If you buy an established property from 13 May onwards, any rental loss can only be offset against residential property income or capital gains, not your salary.

For Queensland public sector employees considering an investment purchase now, the timing matters. Properties bought before 13 May are grandfathered under the existing arrangements. Properties bought after that date and before 1 July 2027 will still have access to full negative gearing until the new rules take effect, but the capital gains tax treatment will shift to the new indexed model unless you're buying a new build.

Variable rate loans don't change how the negative gearing rules apply, but they do give you the flexibility to adjust your repayment strategy as the tax treatment shifts. If you're planning to hold the property long term and your rental loss is minimal, the ability to use an offset account to reduce interest costs becomes more useful when you can't claim the full loss against your salary.

Refinancing a Variable Rate Investment Loan

You can refinance a variable rate investment loan without break costs. If your current lender isn't offering a rate discount that reflects your improved equity position or borrowing history, refinancing to a lower rate can reduce your interest cost and increase your offset benefit.

In our experience, public sector employees who have held an investment property for a few years and built up equity often qualify for a lower rate than they're currently paying. Lenders compete for borrowers with strong serviceability and lower loan to value ratios, so refinancing can deliver a better rate and offset terms without the restrictions that come with a fixed rate lock-in.

The refinance process involves a new application, valuation, and settlement, but there's no penalty for exiting a variable rate loan early. If the rate saving covers the refinance costs within 12 to 18 months, the switch is usually worthwhile.

How Loan to Value Ratio Affects Your Rate and Offset Access

Lenders assess your loan to value ratio to determine the rate and features they'll offer. A lower LVR usually means access to a lower rate and full offset functionality.

If you borrow 80% of the property value or less, most lenders will offer their standard investor rates and a full offset account. If you borrow above 80%, you'll pay Lenders Mortgage Insurance and may face a higher rate or limited offset features depending on the lender.

Queensland public sector employees often qualify for LMI waivers at higher LVRs, which can improve your borrowing capacity and reduce upfront costs. Even with an LMI waiver, the rate and offset terms you're offered will still depend on the LVR, so having a deposit of at least 20% improves your overall loan structure.

Choosing Between Variable and Fixed Rates for Investment Loans

A variable rate gives you flexibility and offset access. A fixed rate locks in your repayment amount for a set period but usually comes without offset functionality and with penalties if you repay early or refinance.

If you expect to receive irregular lump sums, such as bonuses or rental income from other sources, a variable rate with offset lets you park those funds and reduce your interest cost without committing them permanently. If you want certainty around your monthly contribution and you're prepared to forgo offset flexibility, a fixed rate might suit you.

Some investors split their loan between variable and fixed, keeping part of the loan on a variable rate with offset and fixing the rest for repayment certainty. The split structure gives you access to both features but adds complexity when you're managing repayments and tax records.

Applying for a Variable Rate Investment Loan

Lenders assess your serviceability based on your income, existing debts, and the rental income the property will generate. For investment loans, most lenders only include 80% of the expected rental income in their serviceability calculation to account for vacancy periods and maintenance costs.

Queensland public sector employees benefit from stable income and often receive preferential rate treatment from lenders who view public sector employment as lower risk. Your application will need to show that you can service the loan repayments from your salary and rental income combined, even if rates rise.

The deposit requirement for investment loans is typically 20% to avoid LMI, though some lenders will go to 90% LVR with LMI or an LMI waiver for eligible borrowers. You'll also need to cover stamp duty and settlement costs, which vary depending on the property value and location.

Call one of our team or book an appointment at a time that works for you. We'll walk through your borrowing capacity, rate options, and offset structures based on your current position and the type of property you're looking to purchase.

Frequently Asked Questions