Top Strategies to Lock Fixed Rates as an Investor

Fixed rate investment loans lock your repayments for a set term, usually between one and five years.

That predictability matters whether you're buying your first rental property in your thirties, consolidating a portfolio in your fifties, or managing passive income in retirement. What changes across those stages is how much rate protection you need, how much cashflow flexibility you want, and how tax reform scheduled for July 2027 affects your property and your decision-making.

Why Fixed Rates Appeal to Investors in Sydney

A fixed rate gives you known repayments and shields you from rises during the fixed term. For property investors in Sydney, where rents can lag behind holding costs and vacancy can interrupt cashflow, locking part or all of your loan provides breathing room. Variable rates move with the Reserve Bank and lender margin decisions. Fixed rates move once, when you lock them in.

That said, fixed loans carry break costs if you repay early or refinance before the term ends, and most lenders restrict additional repayments during the fixed period. We regularly see investors choose a split, fixing a portion for protection while keeping the rest variable for flexibility.

Buying Your First Investment Property in Your Thirties

Your focus at this stage is usually cashflow and growth. You might be balancing an owner-occupied mortgage alongside a new investment loan, so predictable repayments make budgeting easier, especially if you're relying on rental income to service both.

Consider a buyer who acquires a two-bedroom unit in Liverpool in mid-2026 with a 20 per cent deposit. Rental income covers most, but not all, of the loan repayment. They fix 70 per cent of the loan for three years and leave 30 per cent variable. The fixed portion protects their budget from rate rises. The variable portion allows them to make lump sum repayments from bonuses or tax refunds without penalty, and gives them the option to refinance part of the loan if their situation changes before the fixed term ends. Three years later, the fixed portion reverts to variable unless they renew. By then, they've built equity, rental income has increased, and they have more headroom to absorb rate movements or consider a second property.

Expanding Your Portfolio in Your Forties and Fifties

At this stage, many investors hold two or more properties and have a higher income, but also higher debt. Serviceability becomes the binding constraint, particularly under the debt-to-income caps introduced in February 2026. Lenders assess your ability to repay using a buffer of 3 percentage points above the product rate, and most cap new investor lending at six times income.

A fixed rate can help you meet serviceability tests because the repayment is known and, in some cases, slightly lower than the equivalent variable rate when markets expect cuts. It also protects your cashflow if you're approaching retirement and want to avoid repayment shocks as your salary tapers.

If you're considering purchasing another property before mid-2027, the changed negative gearing rules become relevant. Properties acquired after 7:30pm on 12 May 2026 can only offset rental losses against other rental income or future property gains unless they qualify as eligible new builds. Existing properties continue under current rules. That distinction changes how much cashflow support you receive from deductions, which in turn affects how much rate certainty you need. Fixing a higher proportion of the loan can offset the reduced tax benefit by giving you stable repayments and time to adjust.

How a Split Strategy Works Across Different Lenders

Most lenders allow you to split your investment loan into fixed and variable portions. You nominate the percentage of each when you settle, and each portion operates independently. The variable portion allows unlimited additional repayments and redraw. The fixed portion allows limited or no extra repayments, depending on the lender, and usually charges a break cost if you exit early.

Split ratios depend on your priorities. A 50/50 split balances protection and flexibility. An 80/20 split weighted to fixed gives maximum certainty but limits your options if you want to sell, refinance or repay ahead of schedule. A 30/70 split weighted to variable works if you value flexibility and expect rates to fall or stay flat during the fixed term.

When comparing investment loan options, ask whether the lender permits multiple splits, whether you can fix different portions for different terms, and what the break cost formula is. Some lenders use wholesale funding curves, others use a simpler margin recovery method. The difference can be thousands of dollars if you need to exit early.

Using Fixed Rates to Protect Retirement Income

Investors approaching or in retirement often shift from growth to income. The goal is reliable cashflow without the stress of rate volatility. Many retirees have paid down or paid off their home and hold one or two investment properties that generate passive income to supplement the age pension or superannuation.

A five-year fixed rate gives you certainty through the early years of retirement and allows you to plan spending, travel and drawdowns without worrying about repayment increases. Interest-only repayments remain available on investment loans, though they require stronger serviceability and a lower loan-to-value ratio than in the past. Pairing a fixed rate with interest-only repayments maximises cashflow, but you need to ensure rental income and other assets can support the loan when the interest-only period ends or the fixed term expires.

From July 2027, the capital gains tax discount changes for new purchases. Existing properties retain the 50 per cent discount for gains accrued before that date, but gains after July 2027 will be indexed to inflation and taxed at a minimum 30 per cent rate unless you qualify for an exemption. If you're holding properties acquired before mid-2026, your tax position remains stable. If you're buying new property in retirement, the CGT changes and the loss quarantining rules both reduce the tax benefit of holding residential property unless it's an eligible new build. Locking a fixed rate protects you from repayment increases while those tax rules settle and you adjust your strategy.

What Happens When Your Fixed Term Ends

When the fixed period expires, your loan reverts to the lender's standard variable rate unless you negotiate a new rate or refinance. Standard variable rates are usually higher than discounted variable rates offered to new customers, so the end of a fixed term is a prompt to review.

You have three options at expiry. You can refix for another term if rates are acceptable and you still want certainty. You can switch to variable and negotiate a discount with your current lender. Or you can refinance to a new lender for a lower rate or different loan features. If your property has increased in value and your loan-to-value ratio has improved, refinancing can unlock lower rates and remove Lenders Mortgage Insurance from future borrowing. A loan health check six months before your fixed term ends gives you time to compare offers and act before the reversion happens.

Splitting by Property Rather Than by Loan

If you own multiple investment properties, you can apply different strategies to each loan rather than splitting a single loan. One property might be fully fixed because it has tight cashflow and you want certainty. Another might be fully variable because you plan to sell within two years or because rental income comfortably exceeds the repayment.

This approach works particularly well if one property was acquired before 12 May 2026 and retains full negative gearing, while another was acquired after that date and is subject to loss quarantining. The older property can absorb rate rises because losses offset your other income. The newer property benefits from rate certainty because you can't claim those losses as broadly. Tailoring the rate type to the tax treatment and cashflow profile of each property gives you more control than applying a single split ratio across your whole portfolio.

Call one of our team or book an appointment at a time that works for you. We'll review your current loans, your portfolio plans, and the timing around tax changes to work out whether fixing part or all of your investment borrowing makes sense for where you are now and where you're heading.

Frequently Asked Questions