Variable Rate Home Loans: How They Work and What to Consider

Understanding how variable interest rates, offset accounts and flexible loan features can affect your repayments and help you choose the right home loan.

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A variable rate home loan offers flexibility, allowing borrowers to make additional repayments, access features such as offset accounts and potentially benefit when interest rates fall. However, variable interest rates can also increase, affecting monthly repayments and household budgets.

For homeowners and buyers in Bentleigh, understanding how variable home loans work is an important part of choosing a mortgage that suits both their current circumstances and longer-term financial goals.

Whether you're buying your first home, upsizing for a growing family or reviewing an existing mortgage, it's important to understand the benefits, costs and risks before deciding which loan structure is right for you.

What Is a Variable Rate Home Loan?

A variable rate home loan is a mortgage where the interest rate can increase or decrease throughout the loan term.

Unlike a fixed rate loan, where the interest rate remains unchanged for an agreed period, a variable rate is determined by the lender and can change at its discretion.

These changes are often influenced by movements in the Reserve Bank of Australia's official cash rate. However, lenders do not always pass on cash rate changes in full or immediately. Their funding costs, competitive positioning and lending policies can also influence the interest rates they offer.

The interest rate available to an individual borrower will depend on several factors, including the lender, loan product, loan-to-value ratio and individual circumstances.

When variable interest rates change, the minimum repayments on a principal and interest home loan will generally be adjusted accordingly.

One of the main advantages of variable home loans is their flexibility. Many products allow borrowers to make additional repayments without penalty and offer features such as offset accounts or redraw facilities.

However, these features vary between lenders and loan products, so it's important to understand exactly what is included and whether additional fees apply.

How Much Can a Rate Change Affect Your Repayments?

Even a relatively small interest rate increase can have a noticeable impact on monthly mortgage repayments.

Consider a couple in Bentleigh with a $600,000 owner-occupied home loan over 30 years, making principal and interest repayments.

Using illustrative interest rates:

  • At 6.75% p.a., monthly repayments would be approximately $3,892.
  • At 7.00% p.a., monthly repayments would increase to approximately $3,992.
  • This represents an increase of approximately $100 per month, or $1,200 annually.

These figures are examples only and do not represent a current lender offer.

While a 0.25% increase may appear relatively small, the cumulative effect of higher repayments can place additional pressure on household budgets, particularly when combined with other rising living expenses.

One strategy borrowers may consider is budgeting for repayments above their current minimum requirement.

For example, if the minimum monthly repayment is approximately $3,892, a borrower might choose to pay $4,000 per month while their circumstances allow.

By making additional repayments, borrowers can reduce their outstanding loan balance sooner while building some protection against future interest rate increases.

However, any future increase in the lender's required minimum repayment will depend on the outstanding loan balance, remaining loan term and applicable interest rate.

You can estimate how different interest rates may affect your repayments using our mortgage repayment calculator.

How Does an Offset Account Work With a Variable Rate Home Loan?

An offset account is a transaction account linked to a home loan. The money held in the account is offset against the outstanding loan balance when the lender calculates interest.

For example, consider a borrower with:

  • A $600,000 variable rate home loan.
  • An interest rate of 6.75% p.a.
  • $40,000 held in a linked 100% offset account.

Instead of calculating interest on the full $600,000 loan balance, the lender calculates interest on $560,000 while the $40,000 remains in the offset account.

At an interest rate of 6.75%, maintaining a $40,000 offset balance could reduce interest by approximately $225 per month, assuming the balance remains unchanged.

Importantly, an offset account generally does not reduce the minimum required principal and interest repayment.

Instead, because less interest is charged, a greater portion of each repayment goes towards reducing the principal. Over time, this can help borrowers repay their mortgage sooner and reduce their overall interest costs.

Another advantage is that money held in an offset account remains accessible for everyday expenses, unexpected costs or future financial commitments.

However, not all offset accounts operate in the same way. Some lenders charge annual package fees, monthly account fees or higher interest rates for loans with offset facilities.

Borrowers should therefore consider whether the potential interest savings justify any additional costs.

For someone maintaining substantial savings, an offset account may provide significant value. For borrowers with limited savings, a lower-rate loan without an offset facility may be more cost-effective.

Variable, Fixed or Split Home Loan: Which Suits You?

Choosing between a variable, fixed or split home loan depends on your financial circumstances, preferences and longer-term objectives.

Variable Rate Home Loans

Variable rate loans may suit borrowers who value flexibility, the ability to make additional repayments and access to features such as offset accounts.

The main consideration is that interest rates and repayments can increase, making budgeting less predictable.

Fixed Rate Home Loans

Fixed rate loans provide interest rate certainty for an agreed period, commonly between one and five years.

This can make household budgeting easier because the interest rate and scheduled principal and interest repayments generally remain unchanged during the fixed period.

However, fixed rate loans may restrict additional repayments, limit access to offset facilities and involve break costs if the loan is repaid or refinanced before the fixed period ends.

Split Home Loans

A split home loan combines fixed and variable interest rate components.

For example, a borrower might choose to fix 50% of their mortgage while retaining the remaining 50% on a variable rate.

This provides some repayment certainty while preserving flexibility on the variable portion.

However, the fixed component will generally remain subject to the restrictions associated with fixed rate lending.

There is no single loan structure that suits every borrower.

For some households, the flexibility of a variable rate is particularly valuable. Others may prefer the repayment certainty of a fixed rate, while a split loan can provide a balance between the two.

If your existing fixed rate is approaching expiry, our fixed rate expiry page explains the options worth considering before your fixed period ends.

Which Home Loan Features Are Worth Paying For?

The lowest advertised interest rate does not necessarily mean the best home loan for your circumstances.

When comparing mortgage products, it's important to consider the interest rate alongside the features, fees and flexibility offered.

Some of the features worth reviewing include:

  • Offset accounts: Allow savings to reduce the loan balance used to calculate interest while keeping those funds accessible.
  • Redraw facilities: May allow borrowers to access additional repayments previously made towards their mortgage, subject to the lender's conditions.
  • Additional repayments: Provide an opportunity to reduce the loan balance faster and potentially save interest.
  • Loan fees: Application fees, annual package fees and ongoing account charges can affect the overall cost of a mortgage.
  • Repayment flexibility: The ability to make fortnightly or weekly repayments may assist with household budgeting.
  • Loan portability: Some lenders allow borrowers to retain an existing loan when changing security properties, subject to eligibility and approval.

Before choosing a loan, consider whether you are likely to use the features being offered.

For example, paying an annual package fee for an offset account may be worthwhile if you consistently maintain a meaningful savings balance. However, if the account is rarely used, a simpler loan with fewer fees may be more suitable.

It's also important to consider how your financial circumstances may change.

Moving home, renovating, starting a family or purchasing an investment property can all influence which loan features are most valuable.

Your borrowing capacity will also determine which lending options are available. Understanding your borrowing capacity early can help you make more informed decisions.

Is It Time to Review Your Current Variable Home Loan?

If you haven't reviewed your variable home loan for some time, it may be worth checking whether your current interest rate and loan features remain competitive.

Mortgage pricing can change considerably over time, and lenders may offer different rates to new and existing customers.

A loan that was competitive when you originally purchased your property may no longer represent the most suitable option.

However, reviewing your mortgage does not necessarily mean you need to refinance.

In some cases, your existing lender may be willing to negotiate a more competitive interest rate without requiring you to change banks.

In other circumstances, refinancing to a new lender may provide access to better pricing, more suitable loan features or a different repayment structure.

Before refinancing, it's important to consider:

  • The interest rate and repayments offered by the new lender.
  • Any discharge, application or settlement costs.
  • Whether the proposed loan includes the features you require.
  • The impact of changing or extending your loan term.
  • The total interest costs over the expected life of the loan.

For example, extending an existing mortgage back to a 30-year term may reduce the required monthly repayment, but it can also increase total interest costs if the loan is maintained over the longer period.

A proper home loan review should consider these factors rather than focusing solely on the advertised interest rate.

If you're considering changing lenders, our refinancing page explains the process and what to consider.

Alternatively, a loan health check can help determine whether your existing mortgage is still competitive.

Speak to Balcombe Financial About Your Home Loan Options

Whether you're purchasing a property in Bentleigh, refinancing your existing mortgage or simply reviewing your current interest rate, choosing the right home loan involves more than comparing rates alone.

At Balcombe Financial, we help clients understand their lending options and compare variable, fixed and split home loans from a broad panel of lenders.

We consider interest rates, loan features, flexibility and overall costs to help identify a suitable lending solution based on your individual circumstances.

If you're unsure whether your current home loan is still competitive, contact Michael at Balcombe Financial to arrange a home loan review and discuss your options.

You can also book an appointment at a time that suits you.


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