How to Choose a Variable Rate Investment Loan

What a Variable Rate Investment Loan Actually Does

A variable rate investment loan lets you borrow to purchase a rental property with an interest rate that moves up or down based on market conditions and lender decisions. The rate isn't locked, so your repayments can change throughout the loan term. For investors in Maroubra, where many properties are older units or townhouses requiring periodic maintenance, that flexibility can make the difference between holding through a vacancy period and feeling stuck.

When you take out an investment loan, the lender assesses your application based on your income, existing debts, and the rental income the property is expected to generate. Since November 2025, lenders have also been required to track how many borrowers they approve with a debt-to-income ratio of six times or more, which means some investors with high incomes but significant borrowing may find approval tighter than it was a year ago. The property itself becomes security for the loan, and the lender registers a mortgage over the title.

Variable rates sit lower than fixed rates in most market conditions, and they come with features that let you pay down the loan faster or redraw funds when you need them. That access matters when a hot water system fails or when you want to use equity to buy a second property without refinancing the whole loan.

Interest Only or Principal and Interest

Most variable rate investment loans offer both interest-only and principal-and-interest repayment options. Interest-only repayments mean you pay only the interest charged each month, keeping the loan balance unchanged and maximising your cash flow. Principal-and-interest repayments reduce the loan amount over time, building equity and lowering the total interest you pay across the life of the loan.

For an investor holding a two-bedroom unit near the Maroubra surf club, interest-only repayments might free up cash to cover strata fees and council rates while keeping the loan structure intact for tax purposes. Interest on an investment loan is deductible against rental income, so keeping the loan balance high can increase your annual deductions. Once the interest-only period ends, the loan typically converts to principal-and-interest repayments unless you apply to extend the interest-only term.

From a capital perspective, lenders treat interest-only loans as higher risk than principal-and-interest loans at the same loan-to-value ratio. If you are borrowing above 80 per cent of the property value on an interest-only basis, expect the lender to apply stricter serviceability checks and potentially a higher rate.

What Features Make a Difference

Redraw facilities and offset accounts are the two features that separate a workable variable rate investment loan from one that leaves you locked in. A redraw facility lets you withdraw extra repayments you have made above the minimum, which can be useful if you have paid down the loan during a period of strong rental income and need funds later for repairs or another purchase. An offset account is a transaction account linked to your loan where the balance reduces the interest charged without technically reducing the loan balance.

For tax purposes, the distinction matters. If you redraw funds from an investment loan and use them for private purposes, the interest on that redrawn amount is no longer deductible. If you withdraw funds from an offset account, the loan balance never changed, so the full interest remains deductible. Most investors working with properties in Maroubra, where coastal maintenance and salt damage can drive unexpected costs, prefer an offset account to keep the tax treatment straightforward and avoid the need to split loan purposes later.

Portability is another feature worth checking. If you sell the Maroubra property and buy another investment property in Randwick or Bondi Junction, a portable loan lets you transfer the existing loan to the new security without discharging and reapplying. That saves on discharge fees, application fees, and valuation costs, and it keeps your existing rate and terms in place.

How Lenders Assess Rental Income

Lenders don't take your estimated rental income at face value. Most lenders apply a shading factor, which means they count only 70 to 80 per cent of the expected rent when calculating your borrowing capacity. A property advertised at $750 per week might be assessed as $525 to $600 per week in the lender's serviceability model. That shading accounts for vacancy periods, tenant arrears, and maintenance downtime.

Maroubra sits close to the University of New South Wales, and properties within walking distance of the light rail or express bus routes to the city tend to hold tenants longer than units further from transport. Lenders don't adjust shading based on proximity to transport, but they do care about the vacancy rate in the suburb when they assess risk. A suburb with a vacancy rate above 3 per cent may trigger additional scrutiny or a lower income assumption.

If you are purchasing a property that is currently vacant or undergoing renovation, most lenders will use a desktop valuation or comparable rent assessment rather than the actual lease in place. In that scenario, providing a rental appraisal from a local agent familiar with the Maroubra market can support the application, though the lender will still apply their own shading.

Rate Discounts and How They Move

Every lender publishes a standard variable rate, and almost every borrower receives a discount off that rate. The discount you receive depends on the loan amount, the loan-to-value ratio, and whether you are taking out other products with the lender such as offset accounts or packaged transaction accounts. A borrower with a 70 per cent LVR and a loan amount above $500,000 will generally receive a larger discount than a borrower at 85 per cent LVR borrowing $350,000.

Discounts are not locked for the life of the loan. If the lender increases their standard variable rate by 0.25 per cent, your discounted rate also increases by 0.25 per cent. If the lender changes their discount structure for new customers, your existing discount does not automatically change, but you can ask to be moved to a current discount if the new offer is larger. That negotiation is one reason investors with variable rate loans should review their rate at least once a year or after any Reserve Bank movement.

For investors holding multiple properties, some lenders offer portfolio discounts once your total borrowing across all securities exceeds a threshold. That threshold varies, but it typically starts around $1 million in total lending with the one lender.

What Changed in the Legislation

From the 2027-28 income year, losses related to established residential investment properties purchased after 12 May 2026 can only be offset against income from other residential properties, not against salary or business income. Properties purchased before that date, or properties under contract before that date, remain fully deductible against all income until sold. Eligible new builds continue to be fully deductible regardless of purchase date.

If you purchased a Maroubra investment property in early 2026 or earlier, your loan interest and other holding costs remain deductible against your salary. If you purchase an established property now, your interest and expenses can only offset rental income or capital gains from residential property. Losses you cannot use in a given year can be carried forward to offset residential property income in future years.

This does not change the structure of the loan itself, but it does change the cash flow benefit of holding a negatively geared property. Investors who were relying on the tax refund from negative gearing to help cover loan repayments may need to hold more cash reserves or choose interest-only terms to keep repayments lower during the early years of ownership.

When Refinancing Makes Sense

A variable rate investment loan should be reviewed whenever your rate sits more than 0.30 per cent above the rate available to a new customer with the same loan size and LVR. That gap suggests you are paying a loyalty tax, and refinancing to a new lender or renegotiating with your current lender can bring the rate back in line.

Refinancing also makes sense when you want to access equity for a second purchase. If your Maroubra property has increased in value and your loan-to-value ratio has dropped below 80 per cent, you can refinance to release equity without paying Lenders Mortgage Insurance on the increased borrowing. That equity can then be used as a deposit on another investment property, allowing you to grow your portfolio without saving a new deposit from scratch.

Timing matters. Refinancing during a period of rising rates can lock you into a higher rate for the next two years if you choose a fixed term, but moving to a new variable rate with a better feature set and lower ongoing margin can still reduce costs over time. The key is to compare the exit fees on your current loan, the application fees on the new loan, and the interest saving over at least a two-year period.

Call one of our team or book an appointment at a time that works for you at BlueGrey Financial. We work with investors across Maroubra and the eastern suburbs and can walk through your current loan structure, your goals for the next property, and the lenders whose policies actually match what you are trying to do.

Frequently Asked Questions