Top 10 Ways Fixed Rate Investment Loans Work

Fixed Rate Investment Loans Lock In Your Borrowing Cost

A fixed rate investment loan holds your interest rate at a set level for a chosen period, typically between one and five years. Your repayment stays the same regardless of what happens with the cash rate during that time. That certainty matters when you're carrying an investment property loan and relying on rental income to cover most of the cost.

Consider a buyer who refinances an existing investment property to release equity for a second purchase. They split the total borrowing across two rate types: a variable portion to retain offset and redraw access, and a fixed portion covering the new loan amount. The fixed leg protects the new property's cash flow from rate increases during the first few years, when vacancy or maintenance costs are harder to predict.

Fixed rate investment loans are assessed under the same serviceability buffer as variable loans, currently 3.0 percentage points above the product rate. Your borrowing capacity doesn't increase by choosing a fixed rate, but the certainty can make budgeting more predictable once the loan settles.

Interest Only Repayments Pair With Fixed Rates on Investment Loans

Interest only repayments can be structured on both fixed and variable rate investment loans, and the interest remains tax deductible to the extent the property is rented or held to produce income. Pairing interest only with a fixed rate gives you a known monthly cost for the term of the fix, which helps when you're modelling vacancy periods or comparing different investment property finance structures.

Most lenders allow interest only periods of up to five years on an investment loan. That period can align with the fixed rate term, or run separately. After the interest only period ends, the loan converts to principal and interest unless you apply to extend it. Not all lenders will extend interest only on investment loans beyond the first term, particularly where the loan to value ratio sits above 80 per cent.

Why the Rate Stays Higher on a Fixed Investment Loan

Investment loans attract higher risk weights than owner-occupied loans under APRA's Prudential Standard APS 112, which increases the capital cost to the lender. Fixed rate investment loans carry an additional margin because the lender is taking on interest rate risk for the term of the fix. At current pricing, the fixed rate on an investment loan typically sits 0.2 to 0.5 percentage points above the equivalent owner-occupier fixed rate, and another 0.1 to 0.3 percentage points above a variable investment rate.

That margin reflects the lender's cost of funds and the capital charge applied to the loan. It doesn't mean the fixed rate is poor value. It means you're paying for certainty, and the value of that certainty depends on what rates do during the fixed period and how much cash flow protection matters to your situation.

You Lose Offset and Most Redraw Access During the Fixed Period

Most lenders do not offer offset accounts on fixed rate loans, whether the loan is for investment or owner-occupied purposes. Some allow limited redraw, often capped at a set dollar amount per year or restricted to hardship circumstances. A few lenders allow unlimited redraw on fixed investment loans, but those products typically carry a higher rate.

If you want to park surplus rental income or other cash against the loan and reduce the interest cost, a variable rate with full offset is the better structure. If you want known repayments and don't expect to build surplus cash during the fixed term, the fixed rate works. Many investors use a split loan structure to hold both features: variable for flexibility, fixed for stability.

Fixed Investment Loans Still Allow Extra Repayments Within a Cap

Most lenders allow extra repayments on a fixed rate investment loan up to a yearly cap, typically between $10,000 and $30,000 depending on the institution and loan size. Extra repayments above that cap attract a break cost, calculated based on the lender's wholesale funding cost and the remaining term of the fixed period.

If you're planning to sell the investment property or refinance before the fixed term ends, factor in the potential break cost before locking in the rate. If you're holding the property long term and don't plan to make large lump sum repayments, the cap is usually high enough to absorb minor variations in rental income or occasional windfalls without penalty.

Locking a Rate Before Settlement Costs Nothing but Limits Your Options

Most lenders allow you to lock a fixed rate for 90 days before settlement at no cost. The lock protects you from rate increases during that window, but it also prevents you from switching to a lower rate if fixed rates fall before you settle. Rate lock policies vary between lenders. Some allow a one-time re-lock if rates drop. Others hold the original rate regardless.

For an investment loan top-up or refinance, you can usually lock closer to settlement because there's no property purchase driving the timeline. For a new purchase, the lock period needs to cover contract exchange, finance approval and settlement, which in some states can stretch beyond 90 days. If settlement is delayed and the lock expires, you take the current fixed rate at the time of settlement.

You Can Split a Fixed Rate Across Multiple Terms

Some lenders allow you to split a fixed rate investment loan into multiple fixed terms. As an example, you might fix half the loan for two years and the other half for four years. That structure spreads your refinancing risk across two different maturity dates, so you're not exposed to a single rate environment when the fixed term ends.

Splitting across terms adds complexity, and not all borrowers find it worthwhile. It works when you're uncertain about the rate outlook and want to hedge without committing the entire loan to one view. It doesn't work if you're trying to maximise offset access or plan to make large extra repayments, because both features are restricted during the fixed periods.

Fixed Rate Investment Loans Don't Reduce Your Borrowing Capacity

Some borrowers assume that locking in a lower fixed rate will increase how much they can borrow. APRA requires lenders to assess serviceability at a rate at least 3.0 percentage points above the loan product rate, so a fixed rate loan is still tested at the variable rate plus buffer. Your borrowing capacity is determined by your income, existing debts and the lender's serviceability policy, not by the rate type you choose.

The fixed rate affects your cash flow after settlement, not your borrowing limit before it. If you're trying to stretch your borrowing capacity to buy a second investment property, the rate type won't help. Structuring the loan as interest only reduces the repayment amount and can improve serviceability, but the assessment rate remains the same.

Breaking a Fixed Rate Early Can Cost Thousands

If you repay a fixed rate investment loan in full before the term ends, most lenders charge a break cost to recover the funding loss. The cost is calculated using the difference between the fixed rate on your loan and the current wholesale rate for the remaining term, multiplied by the loan balance and the time left.

Break costs are highest when rates have fallen since you fixed, because the lender is losing the margin between your higher fixed rate and the lower rate they can now earn on the funds. Break costs can be zero or even result in a small credit if rates have risen. Lenders don't publish break cost formulas in advance, but most will provide an estimate on request. If you're planning to sell or refinance during the fixed term, ask for a break cost estimate before committing to the fixed rate.

When Fixed Rates Make Sense for Investment Property Finance

A fixed rate works when you value certainty over flexibility and expect to hold the loan for the full fixed term. It's particularly useful in the first few years after purchasing an investment property, when rental income may be interrupted by vacancy, tenant changes or maintenance, and you want to eliminate one variable from your cash flow model.

Fixed rates are less useful if you're planning to build equity quickly through extra repayments, if you expect a lump sum from a sale or inheritance during the term, or if you need offset access to manage surplus cash. In those situations, a variable rate or a split structure gives you more control without locking you into a rigid repayment pattern.

Call one of our team or book an appointment at a time that works for you. We'll walk through your property investment strategy, compare fixed and variable rate options across lenders, and structure the loan to fit how you're planning to hold and grow the portfolio.

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