The Easiest Way to Understand Rate Lock-ins & Break Costs

Fixed Rate Investment Loans: What You're Actually Locking In

When you fix the rate on an investment loan, you're entering a contract with the lender to pay a set interest rate for a specific term, typically between one and five years. In return for that certainty, you're giving up flexibility. If you need to break that contract early by selling, refinancing or making large additional repayments, the lender will usually charge a break cost to recover the profit they've lost.

Consider an investor who purchased a two-bedroom unit in Rockdale in mid-2023 with a 30 per cent deposit, borrowing around $450,000 on a three-year fixed rate at 4.5 per cent. By mid-2026, variable rates for investors had dropped to around 6.2 per cent, but if they wanted to refinance to access better features or a lower margin elsewhere, they'd need to break the fixed term and potentially face thousands of dollars in exit fees.

The fixed rate itself doesn't move, but what you can do with the loan during that period is heavily restricted. Most lenders cap additional repayments at $10,000 to $30,000 per year on a fixed investment loan. If you receive a large cash injection from another asset sale or bonus income and want to pay down the loan, you'll either need to wait until the fixed term ends or pay a break cost. That's a direct trade-off for the rate certainty you've bought.

How Break Costs Are Calculated by Lenders

Break costs depend on two things: how much you're breaking, and the difference between your fixed rate and the lender's current wholesale funding cost for the remaining term. If wholesale rates have fallen since you fixed, the lender loses money when you exit early because they've already locked in higher-cost funding to match your loan. That loss gets passed to you as a break cost.

The calculation is opaque. Most lenders use a formula that compares your fixed rate to the current swap rate or bond yield for the remaining period, multiplies the difference by the amount being broken, and applies a present value adjustment. Some lenders also add an administration fee of a few hundred dollars on top. In our experience, investors are rarely given a clear breakdown unless they push for it.

If rates have risen since you fixed, the break cost is often zero or close to it, because the lender isn't out of pocket. In that scenario, you might still pay a discharge or early repayment fee, typically $300 to $500, but not the economic adjustment. You can request a break cost estimate from your lender at any time, and it's worth doing that before you commit to refinancing or selling an investment property.

When a Break Cost Is Worth Paying

Break costs aren't always a deal-breaker. If you can access a significantly lower rate, better loan features, or additional equity to fund another purchase, the long-term benefit can outweigh the upfront penalty.

In a scenario where an investor holds a fixed rate investment loan at 5.8 per cent with two years remaining, and can refinance to a variable rate at 6.0 per cent but with a 0.5 per cent discount from a new lender and access to offset and redraw, the net saving over the remaining two years might exceed a $4,000 break cost. The decision depends on how much you're borrowing, how long is left on the fixed term, and what you're gaining from the switch.

We regularly see this with Rockdale investors who fixed during the rate trough in late 2020 and early 2021, then wanted to refinance in 2024 or 2025 to access equity for a second property. The break cost was real, but so was the opportunity cost of staying locked in without offset or redraw while holding cash in a separate account earning minimal interest. Running the numbers with a broker who isn't tied to one lender is the only way to know whether breaking makes sense for your situation.

Split Rate Loans: A Middle Ground for Investors

A split rate loan divides your borrowing into a fixed portion and a variable portion, allowing you to lock in some certainty while keeping flexibility on the rest. Most lenders let you split in any proportion, such as 50/50, 70/30 or 80/20.

For property investors, a common structure is to fix 50 to 70 per cent of the loan and leave the remainder on variable. The variable portion gives you access to offset and unlimited additional repayments without penalty, while the fixed portion protects you from rate rises on the majority of your debt. If you need to break the loan early, you're only paying a break cost on the fixed portion, not the full amount.

This approach works particularly well for investors in Rockdale who plan to hold the property medium-term but want to retain the option to sell or refinance without being locked in completely. The downside is that you're managing two loan accounts, and the paperwork is slightly more involved. Some lenders also charge separate ongoing fees for each split, which adds to the cost.

Rate Lock-ins During the Application Process

A rate lock is different from a fixed rate loan. It's a tool that lets you lock in the advertised fixed rate at the time of application, protecting you from rate rises while your loan is being assessed and settled. Most lenders offer a rate lock period of 90 days, and some extend it to 120 days for construction or off-the-plan purchases.

If rates rise during that period, you keep the lower rate. If rates fall, some lenders let you relock at the lower rate once during the lock period, but not all. The lock itself is usually provided at no cost, but if you don't settle within the lock period and need to extend, you may be charged a fee or lose the locked rate entirely.

For investors buying in Rockdale's apartment market, where settlement can take 60 to 90 days or longer for new builds near Rockdale Plaza or the station precinct, a rate lock provides certainty during a volatile period. It's particularly relevant if you're buying off the plan, where settlement might be 12 to 24 months away and construction delays are common. In those cases, ask whether the lender offers progressive rate locks or allows you to relock closer to settlement.

What Happens If You Sell the Property During a Fixed Term

If you sell an investment property while the loan is still fixed, the break cost is deducted from your settlement proceeds. You don't have the option to defer or avoid it. The lender will provide a payout figure that includes the outstanding loan balance, any accrued interest, discharge fees, and the break cost if applicable.

The break cost is calculated as at the settlement date, not the contract date, so if there's a delay between signing and settlement, the figure can change. This is particularly relevant in Rockdale, where off-the-plan investor sales or strata title delays can push settlement out by months. If rates have moved significantly in that time, the break cost can increase or decrease depending on the direction.

You can request an indicative payout figure from your lender at any point, but it's non-binding until you request a final payout closer to settlement. Some lenders charge a small fee for each payout quote after the first one. If you're considering selling and you're still within a fixed term, factor the break cost into your net sale proceeds before you commit to a contract price.

Should You Fix or Stay Variable on an Investment Loan?

Variable rates give you flexibility. You can make unlimited additional repayments, use an offset account to reduce interest, and refinance or exit without penalty. Fixed rates give you certainty. Your repayments won't rise if the Reserve Bank lifts rates, and you can budget with confidence for the fixed period.

The trade-off is real, and there's no universal answer. In our experience, investors who plan to hold the property long-term and want predictable cash flow often fix 50 per cent or more. Investors who are building a portfolio and need to access equity regularly tend to stay variable or fix only a small portion. If you're negatively geared and relying on salary income to cover shortfalls, a fixed rate can protect you from cash flow stress if rates rise sharply. If you're positively geared or close to it, the value of certainty is lower.

For Rockdale investors, local rental demand remains solid due to proximity to the airport, the train line and Kogarah hospital, but vacancy rates do fluctuate with new apartment supply near the station. A fixed rate won't protect you from a vacancy, but it will protect you from a rate rise while the property is vacant. That's worth considering if you're holding a unit in a high-density precinct where competition for tenants can be stronger.

Rates are set by the market and the Reserve Bank, not by lenders, and no one can predict them reliably over a three or five-year period. If you're unsure whether to fix, split or stay variable, the question to ask is: what's the cost if I get this wrong, and can I afford that cost? If the answer is no, fixing or splitting makes sense. If the answer is yes, staying variable keeps your options open. A broker who works across the market can show you what each option costs in real terms, including fees, features and flexibility.

Call one of our team or book an appointment at a time that works for you. We'll run the numbers on your actual loan amount and show you what fixing, splitting or staying variable looks like in dollars, not theory.

Frequently Asked Questions