Investment Loans and Fixed Rates Across Your Journey

Your first investment property at 32 and your fourth at 58 call for different loan structures.

The investor deposit you have, the rental income you need, and the tax position you hold shift across time. A fixed interest rate can suit one stage and expose you at another. Understanding when to lock a rate and when to leave it variable keeps more money in your pocket over the long term.

Fixed Rates in Your First Investment Purchase

A fixed rate investment loan locks your interest rate for a set period, usually between one and five years, giving you predictable repayments and protection against rate rises during the fixed term. The product suits buyers who value certainty over flexibility, especially in a rising rate environment.

Consider a buyer purchasing their first investment property while still paying off their home. They hold modest equity and their serviceability is stretched across two loans. Locking the investment loan at a fixed rate for three years means they know exactly what the repayment will be each month, which makes budgeting easier and removes the risk of a rate shock during the fixed period. The downside is they cannot make extra repayments beyond a small annual allowance, typically $10,000 to $30,000 depending on the lender, and they will face break costs if they sell or refinance before the fixed term ends.

At this stage, borrowers are often on higher marginal tax rates due to full-time employment income, so maximising tax deductions through negative gearing benefits is a priority. Interest on the investment loan is deductible to the extent the property is rented or held to produce assessable income. A fixed rate does not change the deductibility, but it does prevent you from paying down the loan quickly if your circumstances improve, which can be frustrating if you receive a bonus or inheritance and want to reduce debt.

Interest-only investment loans are common in this phase because they keep the repayment lower and maximise the deduction. Pairing interest-only with a fixed rate gives you the lowest possible repayment and the highest level of certainty, but it also means you are not reducing the loan balance and you are locked into a product that penalises early exit.

Building a Portfolio with Split Rate Strategies

As your portfolio grows, splitting your loan between fixed and variable rates gives you some certainty without sacrificing all flexibility. A typical split might be 50 per cent fixed and 50 per cent variable, though the exact ratio depends on your risk tolerance and cash flow.

In our experience, investors with two or three properties often choose a split structure on their most recent acquisition. They fix half the loan to protect against rate rises and leave the other half variable so they can make extra repayments or access an offset account. The variable portion also avoids break costs if they decide to sell or refinance within a few years.

Split loans allow you to take advantage of both product types without committing fully to either. If rates fall, the variable portion of your loan will drop. If rates rise, the fixed portion shields you from the full impact. The structure works particularly well for investors who are still accumulating equity and may want to leverage that equity to purchase another property before the fixed term ends.

Some lenders allow you to split a single loan into multiple sub-accounts, while others require separate loan contracts. The latter can mean higher application fees and separate documentation, but the structure is the same. You make one repayment that covers both portions, and the lender allocates it accordingly.

One limitation is that offset accounts are typically only available on the variable portion of a split loan. If you are holding cash for future renovations or a deposit on the next property, that cash will only offset the variable balance, not the fixed portion. This reduces the effectiveness of the offset compared to a fully variable loan.

Transitioning to Retirement with Lower Risk Tolerance

Your appetite for rate volatility usually declines as you approach retirement or reduce your working hours. At this stage, many investors switch from interest-only to principal and interest repayments and increase the fixed component of their loan to reduce uncertainty.

Consider an investor in their early 60s holding two properties. One is almost paid off, the other still carries a loan amount of around 60 per cent loan to value ratio. They plan to retire in three years and will rely on rental income to supplement their pension. Fixing the remaining loan for three to five years ensures the repayment stays constant during the transition to retirement, which makes income planning more predictable.

Under current APRA rules, lenders assess your ability to service a new loan at a rate that is at least 3.0 percentage points above the product rate. For borrowers approaching retirement, this buffer can make it harder to refinance or increase your loan amount, even if your rental income covers the actual repayment. Fixing the rate before you retire can lock in your current loan structure and avoid the need to requalify under tighter serviceability rules later.

Granny flat loans for retirees often involve similar considerations. Borrowers use equity in their home to fund construction of a secondary dwelling, and they may rely on the rental income from that dwelling to service the loan. A fixed rate provides certainty during the construction phase and the early years of tenancy, especially if the borrower is transitioning to pension or super income and cannot easily absorb a rate rise.

One complication is that lenders typically assess rental income at 80 per cent of the actual rent to account for vacancy and maintenance costs. If you are relying on that rental income to service the loan and you fix the rate, you need to be confident the tenant will remain in place and the rent will cover the fixed repayment. A vacancy during the fixed period can create cash flow pressure, and you cannot reduce the repayment by switching to interest-only or extending the loan term without breaking the fixed rate contract.

Fixed Rate Break Costs and Exit Flexibility

Break costs apply when you repay a fixed rate loan before the fixed term ends, either through sale, refinance, or large lump sum payments beyond the annual allowance. The break cost is calculated based on the difference between the fixed rate you are paying and the wholesale rate the lender can now earn by reinvesting your repayment over the remaining fixed term.

If rates have risen since you fixed, the break cost is usually zero or very low because the lender can reinvest your funds at a higher rate. If rates have fallen, the break cost can be substantial because the lender loses income by having to reinvest at a lower rate.

Break costs are a particular concern for investors who may need to sell due to a change in circumstances, such as job loss, health issues, or a tenant who stops paying rent. If you are forced to sell during a fixed term in a falling rate environment, the break cost can run into thousands or even tens of thousands of dollars, depending on the loan amount and the rate difference.

Some lenders allow full portability, meaning you can transfer the fixed loan to a new property without break costs. This can be useful if you are selling one investment property and buying another, but it requires the sale and purchase to settle close together, and the new loan amount must be equal to or greater than the outstanding fixed balance.

Another option is to retain the fixed loan after sale and use it to fund the next purchase, which avoids break costs but requires you to carry the loan between properties. Not all lenders permit this, and it can complicate settlement if the timing does not align.

Rate Discounts and Loan to Value Considerations

Investor interest rates are typically higher than owner-occupier rates, and the rate you are offered depends on your deposit, your loan amount, and the lender's current pricing. A larger investor deposit, usually 20 per cent or more, avoids Lenders Mortgage Insurance and unlocks lower rates. Borrowers with an LVR above 80 per cent pay both LMI and a higher interest rate, which compounds the cost.

Fixed rates are generally advertised as a standard rate with limited room for negotiation, but some lenders offer rate discounts for larger loans, professional packages, or repeat customers. Variable rates tend to have more flexibility for discounting, which is another reason some investors prefer to keep at least part of their loan variable.

If your circumstances change and you want to negotiate a better rate during the fixed period, the lender will usually require you to break the fixed contract and move to a new rate, which triggers break costs. On a variable loan, you can often negotiate a rate reduction without changing the loan contract, either by speaking to your broker or threatening to refinance.

From a tax perspective, break costs on an investment loan are generally deductible in the income year they are incurred, which softens the financial impact. However, the deduction does not eliminate the cost, and it only provides value if you have other rental income to offset.

When Variable Makes More Sense

A variable interest rate investment loan suits investors who want flexibility to make extra repayments, access an offset account, or exit the loan without penalty. Variable rates move with the market, so you benefit when rates fall and pay more when rates rise.

Variable loans are often the right choice for investors who expect to sell within a few years, who plan to make lump sum repayments, or who want to use an offset account to reduce interest costs. The offset account is particularly valuable if you are holding cash for future property purchases, renovations, or other investments. Every dollar in the offset reduces the balance on which interest is calculated, which lowers your interest cost without reducing your tax deduction.

For investors in the accumulation phase who are actively building their portfolio, a variable loan provides the flexibility to leverage equity quickly without waiting for a fixed term to expire. You can refinance or increase your loan amount at any time, which allows you to move on the next opportunity without delay.

The downside is uncertainty. If rates rise sharply, your repayment can increase by hundreds of dollars per month, which can create cash flow pressure if your rental income does not keep pace. This risk is higher for investors with high LVRs or multiple properties, where a rate rise affects several loans simultaneously.

Call one of our team or book an appointment at a time that works for you. We will walk through your current position, your timeline, and the loan structure that fits your stage of life.

Frequently Asked Questions