Proven Tips to Lock In Fixed Investment Loan Rates

Fixed rate investment loans let you lock your interest rate for a set period, usually between one and five years.

If you're buying an investment property in Subiaco or thinking about refinancing an existing rental, the fixed versus variable question comes up almost immediately. The answer depends less on what rates might do next year and more on how your cash flow works right now, what your tenant vacancy buffer looks like, and whether you're planning to adjust your loan structure in the next few years.

How Fixed Rates Work for Investment Property Finance

A fixed rate investment loan holds your interest rate steady for the term you choose. Your repayment amount stays the same regardless of what the Reserve Bank does. Most lenders offer fixed terms from one to five years, with three years being the most common choice.

The trade-off is flexibility. Fixed investment loans typically limit extra repayments to around $10,000 to $30,000 per year depending on the lender. If you want to pay down the loan faster using surplus rental income or a work bonus, you'll hit that cap quickly. Offset accounts are usually unavailable on fixed investment products, which means any cash you're holding for property maintenance or future purchases won't reduce the interest you're charged.

Consider someone who bought a two-bedroom unit near Rokeby Road last year. They locked in a three-year fixed rate at 5.89 per cent on an interest-only loan. Rental income covers the repayment with about $150 per month left over. They know exactly what the loan costs each month for the next two years, which makes budgeting straightforward. The downside is they can't park that $150 surplus in an offset account to reduce interest, and if they want to sell or refinance before the fixed term ends, break costs could apply.

Interest Rate Discounts and How They Apply to Investment Borrowing

Lenders typically offer smaller rate discounts on investment loans compared to owner-occupier loans. The difference usually sits between 0.10 and 0.40 percentage points, depending on your deposit size, loan amount and whether you're taking principal and interest or interest-only repayments.

Fixed rates for investment loans are priced off wholesale swap rates, not the cash rate. That means fixed investment rates can move independently of variable rates and sometimes in the opposite direction. In our experience, fixed investment rates tend to be higher than variable investment rates when the market expects rate cuts, and lower when the market expects rate hikes.

What Happens When Your Fixed Investment Loan Expires

When your fixed term ends, your loan automatically converts to the lender's standard variable rate unless you take action. Standard variable rates are typically much higher than discounted variable rates, sometimes by 1.0 to 1.5 percentage points.

You have three choices. You can refix for another term, switch to a variable rate with your current lender, or refinance to a different lender. Most lenders let you make this decision up to 90 days before your fixed term ends without penalty.

If you're planning to refix, check what your lender's current fixed rates are about three months out from expiry. If they've moved higher, refinancing might deliver a lower rate. If they've dropped, refixing with your current lender could make sense, especially if your loan amount is under $500,000 and the refinance costs don't justify the rate saving.

Why Subiaco Investors Often Choose Split Rate Structures

Subiaco's rental market has stayed tight over the past two years, with vacancy rates sitting below 1 per cent for most of that period. Properties close to Subiaco train station and around Hay Street rent quickly, but strata levies on older units near Rokeby Road can run between $1,200 and $1,800 per quarter, which eats into cash flow.

A split rate structure gives you some rate certainty without locking your entire loan. You might fix 50 to 70 per cent of your loan and leave the rest variable. The variable portion keeps an offset account active, lets you make unlimited extra repayments, and gives you flexibility if you want to access equity or sell within a few years.

For a Subiaco investor borrowing $600,000 on a two-bedroom character unit, splitting $400,000 fixed and $200,000 variable keeps the bulk of the repayment predictable while leaving enough flexibility to manage unplanned costs like a hot water system replacement or body corporate special levy. The variable portion can carry an offset account where rental income and any surplus cash can sit, reducing the interest charged on that $200,000.

Fixed Investment Loans and Interest-Only Repayments

Most investors in Subiaco take interest-only repayments for the first one to five years to maximise tax deductions and keep more cash available for other investments or living expenses. Lenders allow interest-only periods on both fixed and variable investment loans, but there are a few things to know.

Interest-only fixed loans usually come with slightly higher rates than principal and interest fixed loans, typically 0.05 to 0.15 percentage points more. The benefit is lower monthly repayments, which improves cash flow. When the interest-only period ends, your loan converts to principal and interest unless you apply to extend it. Not all lenders will extend interest-only periods, especially if your property value hasn't increased or your income hasn't kept pace.

Under current prudential rules, lenders assess your ability to service the loan at principal and interest repayments even if you're applying for interest-only. They also add a buffer of at least 3.0 percentage points to the loan rate when calculating serviceability. If you're borrowing close to your limit, this can reduce how much you qualify for.

When Break Costs Apply and How They're Calculated

If you pay out your fixed investment loan early, either by selling the property or refinancing, break costs may apply. These costs cover the lender's funding loss when wholesale interest rates have dropped since you fixed your rate.

Break costs are calculated based on the difference between your fixed rate and the current wholesale rate for the remaining term, multiplied by your loan balance. If wholesale rates have risen since you fixed, there's usually no break cost. If they've fallen, the cost can run into thousands of dollars.

In a scenario where you fixed $500,000 at 6.00 per cent for five years and decide to refinance after two years, and wholesale rates for three-year fixed terms have since dropped to 4.80 per cent, the lender has lost income for the remaining three years. The break cost formula would typically produce a charge between $15,000 and $20,000 depending on the lender's calculation method.

Most lenders provide a break cost estimate over the phone or through online banking. If you're thinking about selling or refinancing before your fixed term ends, get that estimate before you commit to anything. Some lenders waive break costs if you're refinancing to a new loan with the same institution, but that's not common for investment loans.

How Debt-to-Income Limits Affect Investment Borrowing Right Now

From February this year, lenders have been restricted in how much they can lend to borrowers with total debts above six times their gross income. Each lender can approve up to 20 per cent of new investment loans to borrowers in that category, measured quarterly.

This doesn't mean you can't borrow if your debt-to-income ratio is above six. It means lenders are more selective. If you're applying for an investment loan in Subiaco with existing debts that push your ratio over six times income, expect more documentation requests and longer approval times. In practice, we regularly see investors with strong rental income, equity and clean credit get approved without issue, but the process takes a bit longer than it did two years ago.

If your total borrowing including the new loan would put you over six times income, choosing a lender who hasn't already used up their quarterly allocation can make the difference between approval and decline.

What You Need to Apply for a Fixed Rate Investment Loan

Lenders assess investment loan applications using the same core documents as owner-occupier applications, but they also want proof the property will generate income. You'll need recent payslips or tax returns, bank statements covering at least three months, and details of any other debts or commitments.

For the investment property itself, lenders require a signed contract of sale, a rental appraisal or existing lease agreement, and strata reports if the property is in a unit block. Rental income is usually assessed at 80 per cent of the appraised rent to account for vacancy and maintenance costs, though some lenders use 100 per cent if you already have a signed lease in place.

If you're refinancing an existing rental property, you'll need the most recent rates notice, rental statement, and your current loan statements. Lenders also check your rental income history to confirm the property has been tenanted consistently.

Call one of our team or book an appointment at a time that works for you. We'll walk through your borrowing capacity, compare fixed and variable rates from lenders across Australia, and structure your loan so it fits your property plans and your tax position without locking you into something that costs more than it should.

Frequently Asked Questions