The truth about locking in your rate right now

A fixed interest rate home loan locks your repayment amount for a set period, typically between one and five years.

That certainty appeals to self-employed business owners managing irregular income, and to PAYG professionals who want to budget without surprises. When you apply for a home loan with a fixed rate structure, you're choosing stability over the possibility of benefiting from rate cuts. You're also accepting limits on how much extra you can repay during that fixed period, which affects how quickly you can build equity.

The decision isn't just about whether rates might rise or fall. It's about whether your financial position and plans suit the restrictions that come with the rate guarantee.

How Fixed Interest Rate Home Loans Work in Practice

A fixed rate loan holds your interest rate constant for the period you select, regardless of what happens to the Reserve Bank cash rate or what variable home loan rates do during that time.

Consider a self-employed consultant securing an owner occupied home loan with a three-year fixed rate. Their repayment stays at the same dollar amount each month for 36 months. If variable rates drop by half a percent in year two, they keep paying the fixed amount. If rates climb by a full percent, they still pay the fixed amount. That predictability lets them forecast cash flow with precision, which matters when business income fluctuates month to month.

Most lenders cap extra repayments on fixed home loan products at around $10,000 to $30,000 per year. Go beyond that limit and you'll face break costs, which are calculated based on the difference between your fixed rate and what the lender can now earn on the money you're returning early. Those costs can run into thousands of dollars if rates have fallen since you locked in.

You also lose access to features common on variable products. An offset account typically isn't available during a fixed term, meaning you can't park your income or savings against the loan balance to reduce interest. Some lenders won't let you make the loan portable if you sell and buy another property within the fixed period without triggering break fees.

When the Numbers Support Fixing Your Rate

Fixed rates make financial sense when your income stability or risk tolerance justifies paying for certainty, even if that certainty costs slightly more than the variable alternative at the time you lock in.

In a scenario where a couple on PAYG salaries are purchasing their first property and stretching their borrowing capacity to the higher end of what they qualify for, locking in repayments removes the risk of rate increases forcing them to cut other spending or struggle with serviceability. The loan amount they can comfortably manage doesn't change, so they know exactly what percentage of their combined income goes to the mortgage each month.

For self-employed borrowers, the calculation often includes tax planning. Without a linked offset to reduce taxable interest, you might not achieve the same efficiency as someone on a variable rate with an offset account holding business operating funds. But if your cash reserves are modest and your income variable, knowing your housing cost won't increase can outweigh the loss of that flexibility.

The loan to value ratio (LVR) you're borrowing at also influences this decision. If you're above 80% LVR and paying Lenders Mortgage Insurance (LMI), your capacity to absorb higher repayments might be limited. A fixed rate removes one source of uncertainty while you focus on building equity and reducing that ratio below 80% over time.

Split Loan Structures: Dividing the Risk

A split loan divides your total borrowing between a fixed portion and a variable portion, letting you access some of the benefits of both structures.

Typically, you might fix 50% to 70% of the loan amount for stability on the bulk of your repayments, while keeping the remainder variable to retain access to an offset account and unlimited extra repayments on that portion. This means you can direct surplus business income or bonuses into the offset or make chunky additional repayments on the variable split without hitting caps or triggering penalties.

We regularly see self-employed clients use this structure to manage irregular income. The fixed portion covers their baseline repayment obligation, which they know they can service even in a slower quarter. The variable portion absorbs extra cash when revenue is strong, letting them reduce interest costs and improve borrowing capacity for future investments without being locked into a single strategy.

Some lenders treat each split as a separate loan for fee purposes, so you might pay two sets of ongoing account fees. Others charge a single set of fees regardless of how many splits you create. That difference can add several hundred dollars per year to your costs, so it's worth clarifying before committing to a split structure.

Calculating the Real Cost of Breaking a Fixed Rate

Break costs apply when you exit a fixed rate loan before the term ends, whether by refinancing, selling the property, or paying down more than the allowed extra repayment limit.

Lenders calculate break costs using the difference between your fixed rate and the wholesale rate they can now earn by lending that money elsewhere for the remaining fixed term. If you locked in at 5.5% and wholesale rates are now 4%, the lender has lost the ability to earn that 1.5% margin for the remaining period. They charge you that lost margin as a lump sum.

The calculation compounds when the remaining term is long. Breaking a five-year fix in year one, when four years remain, generates a much larger cost than breaking in year four when only one year remains. We've seen scenarios where breaking a large fixed loan after six months cost the borrower upwards of $15,000 because rates dropped sharply soon after they locked in.

Some life events trigger clauses that reduce or waive break costs. Certain lenders waive fees if you're selling due to genuine hardship, relationship breakdown, or relocating for work. Others hold firm regardless of circumstance. If there's any chance you'll sell, move interstate, or refinance within the fixed period, that risk needs to factor into whether you fix at all.

What Happens When Your Fixed Rate Ends

When the fixed period expires, your loan automatically reverts to the lender's standard variable rate unless you take action beforehand.

That standard rate is almost always higher than the discounted variable rate the lender offers to new customers or those actively negotiating. The difference can be half a percent or more, which on a $600,000 loan adds over $3,000 per year to your interest costs. Lenders rely on inertia. They know many borrowers won't notice the rate change or won't act on it quickly.

Planning for fixed rate expiry means contacting your broker or lender around 90 days before the term ends. You can negotiate a new fixed rate, switch to a competitive variable rate with the same lender, or refinance to a different lender offering better home loan rates. That three-month window gives you time to compare rates across lenders, run the numbers on whether another fixed term suits your current situation, and complete any application process without being forced onto the standard rate even temporarily.

If your circumstances have changed since you first took out the loan, this is also the moment to adjust your structure. Adding an offset account, switching from interest only to principal and interest, or moving to a split loan all become possible without break costs once the fixed term completes.

Applying for a Fixed Rate Home Loan as a Self-Employed Borrower

Self-employed applicants face closer scrutiny during a home loan application because lenders assess income stability differently than they do for PAYG borrowers.

Most lenders require two full years of tax returns and either accountant-prepared financials or business activity statements to verify income. They apply a margin to that income, often averaging the two most recent years and sometimes applying a loading or discount based on industry and business structure. If your income has grown significantly in the most recent year, some lenders will give more weight to that recent performance, while others stick to a strict two-year average.

A fixed rate doesn't change these borrowing capacity calculations, but it does influence how lenders view your serviceability. If you're borderline on serviceability at current rates, fixing at a slightly higher rate than the variable option means you're committing to repayments that remain serviceable even if your income dips. Some lenders view that as reducing risk. Others assess serviceability at a higher buffer regardless of whether you fix or not, so the benefit is minimal.

You'll still need to demonstrate you can service the loan at a rate well above what you're actually paying, often 3% above the loan rate. That assessment rate doesn't change whether you fix or choose variable, but knowing your actual repayment is locked can make your budget forecast more convincing if the lender asks how you'll manage repayments alongside business expenses.

How to Compare Rates Across Lenders

Comparing home loan rates means looking beyond the headline interest rate to the features, fees, and restrictions attached to each product.

Two lenders might advertise the same fixed rate, but one might allow $30,000 in extra repayments per year while the other allows only $10,000. One might let you port the loan to a new property without break costs, while the other treats any property sale as a full discharge. One might charge a $395 annual package fee, while the other has no ongoing fees but higher upfront costs.

Rate discounts often depend on your LVR and loan amount. A lender offering a sharp rate at 70% LVR might be uncompetitive at 90% LVR where they add a margin for the higher risk. Some lenders reserve their lowest rates for loans above $500,000, while others offer the same rate from $250,000 upwards.

Access to home loan options from banks and lenders across Australia means you're not limited to the major banks. Regional lenders and non-bank institutions frequently offer more flexibility on income assessment for self-employed borrowers and sharper rates on fixed products to attract volume. They might also be more willing to negotiate on break cost clauses or allow features like offset accounts on a split structure where major banks won't.

Making the Decision That Fits Your Situation

Choosing between fixing, staying variable, or splitting your loan comes down to how much you value certainty versus flexibility, and how likely your circumstances are to change during the fixed period.

If you're planning to sell within two years, fixing creates unnecessary risk. If your income is unpredictable and you need to make large lump sum repayments whenever cash allows, a full fix won't work. If you're in a stable job with predictable pay and you want to remove interest rate risk entirely for a set period, fixing might suit.

For most self-employed business owners and PAYG professionals, a split structure offers the most practical balance. You protect a portion of your repayments from rate rises while keeping enough flexibility to take advantage of surplus income and access offset benefits.

The decision isn't permanent. When your fixed term ends, you reassess based on where rates are, where your income and plans are, and what products are available at that time.

Call one of our team or book an appointment at a time that works for you. We'll look at your income structure, your plans for the property, and the current home loan products available across our lender panel to identify which rate structure matches your situation.

Frequently Asked Questions