Fixed, Variable & Split Loans: What First Home Buyers Miss

Fixed or Variable: What's the Difference When You're Borrowing

A fixed rate locks your interest rate for an agreed period, typically one to five years. Your repayments stay the same regardless of what the Reserve Bank does. A variable rate moves with the market. When the cash rate changes, lenders usually pass on rate increases or decreases within weeks.

The difference matters most when you're buying on a small deposit. Consider a registered nurse purchasing a unit in Chermside at the current median, borrowing at 90 per cent through an LMI waiver. On a fixed rate, the monthly repayment stays predictable through your probation period and first year of rostered shifts. On a variable rate, a 0.25 per cent rise can add several hundred dollars to annual repayments without warning. For nurses and midwives working compressed rosters where income fluctuates week to week, that variability hits harder than it does for salaried workers on stable fortnightly pay cycles.

Fixed rates typically sit higher than variable rates at the time you lock them in. Lenders price fixed rates based on where they expect the market to move, not where it is today. That means you're paying for certainty. Whether that cost is worth it depends on your deposit size, your job security, and how much margin you have between your approved borrowing limit and what you're actually spending.

The Offset Account Problem Every First Home Buyer Should Understand

Most variable rate home loans for nurses include an offset account. Every dollar in the offset reduces the balance on which interest is calculated. If you owe $500,000 and hold $20,000 in offset, you pay interest on $480,000. The account operates like a transaction account. Your pay goes in, your expenses come out, and the average balance across the month determines your interest saving.

Fixed rate loans almost never include a full offset account. Some lenders offer a partial offset or a redraw facility, but neither delivers the same tax efficiency or flexibility. Redraw lets you withdraw extra repayments you've made above the minimum, but those funds are locked into the loan structure. You can't use a redraw facility as your everyday transaction account, and accessing funds often requires a formal application with processing delays.

For a first home buyer working shift penalties, overtime, and allowances that vary by roster cycle, an offset account smooths your cash flow. In a fortnight where you pick up additional shifts, the surplus sits in offset and reduces interest immediately. In a quieter fortnight, your balance drops but your loan repayment stays the same. A fixed loan without offset forces you to choose between paying down the loan or holding cash elsewhere in a savings account that earns taxable interest at a rate well below what your mortgage charges.

The tax treatment matters more than most buyers realise. Interest earned in a savings account is assessable income. Interest saved through an offset is not. At marginal tax rates above 30 per cent, that difference compounds quickly for nurses in their second or third year of practice once penalty loadings push total income over $45,000.

Split Loans: The Structure Most Brokers Recommend for Nurses

A split loan divides your borrowing into two portions. Part of the loan sits on a fixed rate. The rest stays variable with an offset account attached. You get repayment certainty on the fixed portion and full flexibility on the variable portion.

The structure works well when you're borrowing at 90 per cent LVR under a waiver. In our experience, buyers with minimal equity and variable shift income benefit from splitting 50 to 60 per cent fixed and 40 to 50 per cent variable. The fixed portion protects your minimum repayment from rate rises during the period when your savings buffer is smallest. The variable portion gives you somewhere to park surplus income and access it without restriction when rostering changes or unexpected costs hit.

As an example, a midwife purchasing in Footscray under the 5% Deposit Scheme for Nurses might borrow $450,000 to cover a unit purchase and associated costs. Splitting $250,000 fixed at a three-year term and $200,000 variable with offset gives her a locked monthly repayment on the larger portion while keeping $200,000 accessible for extra repayments, emergency withdrawals, or offset balance management. If she receives a pay rise, shifts to a higher classification, or picks up agency work, the additional income reduces interest on the variable portion immediately without locking her into higher fixed repayments she may not be able to sustain if her roster drops back.

The split ratio isn't universal. Buyers purchasing in higher-value markets or borrowing closer to 95 per cent LVR often push the fixed portion higher to protect a larger share of the loan from rate movement. Buyers with stable rosters, permanent part-time contracts, or additional household income may prefer a smaller fixed portion or skip it entirely.

How Rate Movements Hit Fixed Loans Differently Than Variable Loans

When you fix your rate, you're locking in today's pricing for a future period. If the market rises, you've protected yourself. If the market falls, you're stuck paying the higher rate until your fixed term ends. Variable loans adjust within weeks of a Reserve Bank decision. Fixed loans don't adjust at all.

The risk for first home buyers isn't the rate itself. The risk is fixing at the wrong point in the cycle and then facing a rate gap when your fixed term expires. If you fix at 6.2 per cent for three years and variable rates drop to 5.5 per cent in year two, you're paying 0.7 per cent more than you need to for the remainder of your term. That difference on a $400,000 loan costs roughly $2,800 per year in unnecessary interest. You can break the fixed contract early, but break costs often exceed the saving unless rates have moved significantly.

Variable loans don't lock you in. If a better rate appears at another lender, you can refinance without break costs beyond standard discharge fees. For nurses and midwives who may relocate for career progression, move from public to private hospitals, or shift from clinical to community roles within the first few years of practice, that flexibility has value beyond the interest rate itself.

What Happens When Your Fixed Rate Ends

Every fixed loan converts to a variable rate when the fixed term expires. The rate you roll onto is the lender's standard variable rate at that time, not the rate you started with. Standard variable rates sit higher than discounted variable rates. Most lenders reserve their lowest variable rates for new customers or refinancers, not for existing customers rolling off a fixed term.

If you fixed three years ago and your term expires next month, your rate will likely jump even if the Reserve Bank hasn't moved. The jump reflects the shift from a competitive fixed rate to a higher standard variable rate. You can negotiate a discount with your current lender or refinance to a new lender offering a lower rate to new customers. Both options require action. If you do nothing, you'll pay more than you should.

We regularly see nurses roll off fixed terms and continue on the standard variable rate for six to twelve months before realising the cost. By then, the unnecessary interest paid often exceeds $3,000 to $5,000 on a typical loan balance. Setting a calendar reminder three months before your fixed term ends gives you time to compare rates, submit a refinance application if needed, and avoid paying the standard variable rate for any longer than necessary.

Which Structure Works When You're Using a Low Deposit Scheme

If you're purchasing under the Australian Government 5% Deposit Scheme, you're borrowing at 95 per cent LVR with no LMI. The scheme allows fixed, variable, and split structures, but not every participating lender offers all three. Some lenders restrict 95 per cent LVR lending to variable rates only. Others allow splits but cap the fixed portion at 80 per cent of the total loan.

Your repayment buffer matters more at 95 per cent LVR than it does at 90 per cent or 80 per cent. A small rate rise has a larger dollar impact when your loan balance is higher. Fixing at least part of the loan protects your serviceability at the point when you have the least equity and the smallest savings buffer to absorb repayment increases.

Buyers using LMI waivers at 90 per cent LVR face the same serviceability risk but with slightly more breathing room. A mortgage broker for nurses can model your repayment capacity at different split ratios and show you the monthly cost of a 0.5 per cent or 1.0 per cent rate rise on the variable portion. That modeling should happen before you make an offer, not after you've signed a contract and locked yourself into a settlement timeline that doesn't give you time to restructure.

Why Break Costs Exist and When They Apply

If you need to exit a fixed loan before the term ends, the lender will charge a break cost. The cost represents the economic loss the lender wears when you repay early. Lenders fund fixed rate loans by borrowing at wholesale fixed rates for the same term. When you break early, they're left holding a funding liability they can't easily unwind.

Break costs are calculated using the difference between the rate you fixed at and the current wholesale rate for the remaining term. If you fixed at 6.0 per cent and wholesale rates have since fallen to 5.0 per cent, the break cost will be significant. If wholesale rates have risen above your fixed rate, the break cost may be zero or close to it.

You'll face a break cost if you sell the property, refinance to another lender, or make a lump sum repayment above the allowed annual limit during the fixed term. Most fixed loans allow up to $10,000 in additional repayments per year without penalty. Anything above that triggers a break cost calculation. For nurses receiving sign-on bonuses, retention payments, or lump sum payouts from previous employers, understanding the prepayment limit before you fix is critical.

The One Feature That Matters More Than the Rate Itself

Portability is the feature most first home buyers ignore and later wish they'd prioritised. A portable loan lets you keep your existing loan and interest rate when you sell your current property and purchase another one. If you've fixed at a low rate and need to move before the term expires, portability lets you transfer that rate to the new property without paying break costs.

Not all lenders offer portability. Those that do often impose conditions, including time limits between settlement of the sale and settlement of the purchase, and restrictions on increasing the loan balance beyond a certain percentage. If you're a graduate nurse purchasing a unit in Blacktown and expect to move closer to a metropolitan teaching hospital within three years as your career progresses, a portable fixed loan protects you from both break costs and the risk of refixing at a higher rate.

Portability also matters if you're buying with a partner and there's any chance of separation within the fixed term. Relationship breakdowns force property sales. A non-portable fixed loan means you'll wear a break cost on top of the legal and emotional cost of separating. A portable loan gives you the option to transfer the loan to a new purchase in your name only, assuming you can service the loan independently.

Splitting Without Overcomplicating Your Loan Structure

A 50/50 split is not always the right answer. The correct ratio depends on how much cash flow variability you're carrying, how secure your roster is, and whether you're planning any large purchases or lifestyle changes in the first three years of ownership.

If your base income covers the minimum repayment comfortably and your penalties and overtime are genuine surplus, you can afford to fix a larger portion and reduce your exposure to rate rises. If your penalties and overtime are necessary to meet the repayment, you need a larger variable portion so that surplus income in high-earning fortnights offsets the shortfall in lower-earning fortnights.

Some buyers split into three portions: a small fixed portion for rate protection, a medium variable portion with offset for cash flow management, and a larger variable portion without offset for aggressive repayment. That structure works for buyers who want the psychological benefit of seeing a portion of the loan shrink quickly while still keeping liquidity in offset. It also creates three separate loan accounts, three sets of statements, and three interest rate negotiations when it's time to refinance. For most first home buyers, a two-way split is enough.

Call one of our team or book an appointment at a time that works for you. We'll model your split options, confirm which lenders support the structure you need at your LVR, and make sure your loan setup matches your actual roster and income pattern rather than a generic first home buyer template.

Frequently Asked Questions