Fixed vs Variable Home Loan Australia 2026: Calculator & Decision Guide

Fixed vs Variable Home Loan Australia 2026: Calculator & Decision Guide HEHomeLoanAI Editorial·7 July 2026 The fixed versus variable decision is one of the most consequential choices you will make when structuring a home loan in Australia. In July 2026, with the RBA cash rate at 3.85 percent and variable rates starting from 5.69 percent, the fixed-rate products on offer from Australian lenders range from 5.89 percent for one year to approximately 6.49 percent for three years. This article explains how a fixed versus variable calculator works, what data it needs, and how to interpret the break-even analysis to decide which loan type saves you more money over your chosen timeframe. This guide is based on real rate data from 34 Australian lenders as of July 2026, including the Big Four, non-bank lenders, and digital banks.

How a Fixed vs Variable Calculator Works

A fixed versus variable calculator compares the total cost of two scenarios — a fixed-rate loan and a variable-rate loan — over a defined period, typically one to five years. The calculator applies the fixed interest rate for the fixed period and then reverts to a projected variable rate for the remaining term. For the variable scenario, it applies the current variable rate with or without projected rate changes.

The core inputs are:

· Loan amount: the total borrowing, typically between 300,000 and 1,500,000 dollars for Australian borrowers · Fixed interest rate: the rate being offered for the fixed term, typically 1, 2, or 3 years · Current variable interest rate: the variable rate you would pay if you chose a variable loan today · Fixed term: how long the fixed rate applies before the loan reverts to variable · Projected variable rate changes: your expectation of whether variable rates will rise, fall, or stay flat · Loan term: the total loan period, typically 30 years but adjustable The calculator computes the total interest paid and the remaining loan balance at the end of the comparison window, then shows the dollar difference between the two scenarios. This is the break-even analysis: it tells you how much variable rates would need to move — in either direction — for one option to become cheaper than the other. The Current Rate Landscape: Fixed vs Variable in July 2026 Before running calculations, it is essential to understand the rates on offer from Australian lenders in mid-2026. The following data is sourced from Ratesniffers, Finder, and Canstar as of July 2026. Variable rates: the lowest advertised owner-occupier variable rate is 5.69 percent (comparison rate approximately 5.72 percent), available from Reduce Home Loans. The Big Four variable rates range from Westpac's 5.99 percent through to CBA's 6.15 percent. The market average for an owner-occupier paying principal and interest is approximately 5.90 percent. Fixed rates: the most competitive fixed-rate products as of July 2026 include 1-year fixed from 5.89 percent, 2-year fixed from 5.99 percent, and 3-year fixed from 6.09 percent. These rates come from a mix of non-bank and digital lenders; the Big Four fixed rates are typically 20 to 40 basis points higher. The RBA cash rate is 3.85 percent as of July 2026, down from its peak of 4.35 percent in 2025. Market pricing suggests a roughly even probability of one further cut in late 2026, though the RBA Board has been careful to avoid telegraphing its next move. This uncertainty is part of what makes the fixed versus variable decision difficult: fixing at 5.99 percent looks attractive if rates rise, but it locks you out of savings if rates fall. Calculator Methodology: The Break-Even Analysis The most rigorous way to compare fixed and variable loans is through break-even analysis. This approach asks: what would variable rates have to do during the fixed-rate period for the total cost of the variable loan to equal the total cost of the fixed loan?

Step 1: Calculate Fixed Scenario Total Cost

For a 600,000-dollar loan with a 2-year fixed rate of 5.99 percent, the monthly repayment over 30 years is approximately 3,592 dollars. Over the 2-year fixed period, total interest paid is approximately 70,200 dollars. After the fixed period ends, the loan reverts to the lender's standard variable rate — typically around 6.49 percent for most major lenders. The total interest cost for the variable tail depends on how long you hold the loan after the fixed period ends.

Step 2: Calculate Variable Scenario Total Cost

For the same 600,000-dollar loan at a variable rate of 5.89 percent (the lowest available), monthly repayments are approximately 3,548 dollars. Over 2 years, total interest paid is approximately 69,100 dollars — about 1,100 dollars less than the fixed scenario. However, this assumes the variable rate stays at 5.89 percent for the entire 2-year period.

Step 3: Determine the Break-Even Rate Change

The break-even point is the rate movement at which the variable scenario costs as much as the fixed scenario. For a 2-year fixed rate of 5.99 percent against a starting variable rate of 5.89 percent, variable rates would need to rise by approximately 15 basis points within the first year for the cost to equalise. If variable rates rise by 25 basis points or more, the fixed rate becomes cheaper. If variable rates fall or stay flat, the variable rate remains cheaper. The break-even calculation is sensitive to four factors: the spread between the fixed and variable rates at the start, the timing of any rate changes, the loan amount, and how long after the fixed period you expect to hold the loan. Fixed Rate Products: What Australian Lenders Offer in 2026 Fixed-rate home loans in Australia are typically offered in 1, 2, 3, and 5-year terms. The borrower locks in the advertised rate for the fixed period, and at the end of that period the loan automatically reverts to the lender's standard variable rate — which is almost always higher than the fixed rate the borrower was paying.

The key mechanics to understand:

· Rate lock periods: most fixed-rate products allow you to lock in a rate for a specified period before your loan settles, which provides certainty during the settlement window · Limited extra repayments: fixed-rate loans typically cap additional repayments at 5,000 to 10,000 dollars per year or 5 percent of the loan balance, whichever is larger. Exceeding the cap triggers a break cost · No offset account: most fixed-rate loans do not offer a full offset facility. Some lenders offer a partial offset (e.g. offset up to 50 percent of the loan balance), but full offset is rare on fixed products · Break costs: if you exit a fixed-rate loan early — by refinancing, selling the property, or making a lump sum repayment above the cap — the lender may charge a break cost based on the movement in wholesale funding rates since the loan was originated. Break costs can be substantial, potentially 10,000 dollars or more on a large loan, so they represent a significant friction Current fixed-rate offerings from major lenders in July 2026 provide a picture of the market: · ING: fixed rates from 5.89 percent for 1 year through their Mortgage Simplifier Fixed product · ANZ: 2-year fixed at 6.29 percent, competitive within the Big Four for shorter fixed terms · Westpac: 2-year and 3-year fixed products available, with rates that vary by LVR and loan purpose · CBA: fixed-rate Wealth Package at 6.34 percent with a 95 percent LVR cap — attractive for first home buyers with a smaller deposit For borrowers who qualify for the lowest fixed rates — typically those with an LVR at or below 70 percent and a strong credit profile — the 5.89 percent to 5.99 percent range is only marginally above the lowest variable rates. This makes fixed products more competitive in 2026 than they were during the rapid rate-rise cycle of 2022-2023, when fixed rates often sat 100 basis points or more above variable rates. Variable Rate Products: What's Available and What Could Change Variable-rate loans are the default choice for most Australian borrowers, holding approximately 80 percent of outstanding mortgage balances. The attraction is straightforward: flexibility. Variable-rate products offer: · Unlimited extra repayments: pay down the loan faster without penalty · Full offset accounts: a transaction account linked to the mortgage that reduces the interest-bearing balance dollar for dollar · Redraw facilities: withdraw extra repayments if needed · No break costs: exit at any time without penalty (though discharge fees apply) · Rate cuts flow through: if the RBA cuts the cash rate, your interest rate should decrease — though lenders do not always pass on cuts in full The variable-rate products available in July 2026 range from 5.69 percent at the lowest end to 6.49 percent at the top of the Big Four range. Non-bank and digital lenders dominate the low end: Reduce Home Loans at 5.69 percent, ING at 5.99 percent, and Macquarie at 6.09 percent with offset. The Big Four's lowest variable rates are Westpac's Flexi First at 5.99 percent and CBA's Extra Home Loan at 6.15 percent. The variable-rate risk is that RBA rate changes flow through in either direction. The market-implied path as of July 2026 suggests one further 25-basis-point cut by the end of 2026, which would take the cash rate to 3.60 percent. If passed on in full, a 25-basis-point cut saves approximately 50 dollars per month on a 400,000-dollar loan or approximately 75 dollars per month on a 600,000-dollar loan. Which Borrower Should Fix and Which Should Stay Variable

Candidates for a Fixed Rate

Borrowers who should strongly consider fixing include those with tight household budgets where a rate rise would cause genuine financial stress. If your monthly surplus is 500 dollars or less after mortgage repayments and living expenses, fixing removes the risk of a rate increase pushing you into deficit. First home buyers with a 5 percent deposit using the First Home Guarantee should evaluate CBA's 95 percent LVR fixed-rate Wealth Package carefully. The rate certainty combined with no LMI (through the Guarantee scheme) provides a stable start to home ownership that variable-rate products cannot match for high-LVR borrowers. Borrowers who believe the RBA will hold or raise rates through 2027 should fix now, while fixed rates are still within 10 to 30 basis points of variable rates. If the RBA raises the cash rate to 4.50 percent or higher, today's 5.99 percent 2-year fixed rate will look like a bargain.

Candidates for a Variable Rate

Borrowers who expect to sell the property or refinance within 12 to 18 months should avoid fixed-rate loans. The break costs alone can eliminate any interest savings from the lower rate, and the inflexibility of a fixed product makes the exit more difficult. Borrowers who plan to make aggressive extra repayments — paying down 20,000 dollars or more per year above the minimum — should stay variable. The extra repayment caps on fixed-rate products will frustrate this strategy, and the interest saved by paying down principal faster on a variable loan often outweighs the rate advantage of fixing. Borrowers who carry a significant balance in their offset account — 30,000 dollars or more — should prioritise variable-rate products with a full 100 percent offset facility. The effective rate on a 6.19 percent variable loan with a 40,000-dollar offset balance on a 500,000-dollar loan is approximately 5.69 percent when calculated as interest paid divided by the loan balance. Most fixed-rate products do not offer offset, which means you lose this benefit. How to Use a Fixed vs Variable Calculator Effectively To get the most accurate comparison from a fixed versus variable calculator, follow these steps: First, gather your actual loan details: the exact loan amount, the fixed rate you have been quoted, the variable rate you could access instead, and the fixed-rate term. Do not use advertised rates — use the rate the lender has quoted for your specific LVR, loan purpose, and repayment type. Second, test multiple rate scenarios. Run the calculator assuming variable rates stay flat, then run it again assuming rates fall 25 basis points, rise 25 basis points, and rise 50 basis points. The range of outcomes tells you how sensitive the decision is to rate movements. If the fixed loan saves money across most scenarios, the decision is clear. If the variable loan wins in most scenarios, likewise. If the outcome depends entirely on what rates do, you are in a true uncertainty trade-off. Third, factor in the non-financial considerations: do you value certainty over flexibility? Would a rate rise cause you stress beyond the dollar cost? Are you likely to sell or refinance during the fixed period? These factors matter as much as the break-even calculation, but they cannot be captured by a calculator — you need to apply judgment on top of the numbers. Fourth, remember that comparison rates on fixed products are calculated based on the higher reversion rate at the end of the fixed period. A 2-year fixed product with a comparison rate of 7.05 percent may look expensive, but the comparison rate assumes you roll onto the standard variable rate and stay there for the full 25-year calculation period. If you refinance at the end of the fixed term — as most borrowers should — your actual cost will be lower than the comparison rate suggests. FAQ Q1: What is a break cost and how is it calculated? A break cost is the fee a lender charges when you exit a fixed-rate loan before the end of the fixed term. It is calculated as the difference between the wholesale funding cost at the time the loan was originated and the wholesale funding cost at the time of exit, multiplied by the remaining loan balance and the remaining fixed term. Break costs are highest when market interest rates have fallen since the loan was fixed — the lender compensates for the lower return on the funds. On a 500,000-dollar fixed-rate loan with 18 months remaining on the fixed term and a 50-basis-point drop in wholesale rates, the break cost can exceed 3,000 dollars. Q2: Can I split my loan between fixed and variable? Yes. A split loan lets you divide the total borrowing into two portions — one fixed and one variable. A common split is 50/50 or 60/40, allowing you to enjoy the rate certainty of a fixed rate on part of the loan while maintaining the flexibility of a variable rate with offset on the other part. Split loans provide a natural hedge: if rates rise, the fixed portion is protected; if rates fall, the variable portion benefits. The main drawback is that you pay fees on both portions and the overall rate may be slightly higher than a single-rate product. Q3: How does the fixed rate reversion work? At the end of the fixed period, your loan automatically reverts to the lender's standard variable rate. This reversion rate is almost always higher than the fixed rate you were paying and higher than the best variable rates available on the market. For example, a borrower who fixed at 5.99 percent for 2 years may revert to 6.49 percent or higher. The smart move at reversion is to contact the lender and request a rate review, or refinance to a more competitive variable-rate product. Failing to act at reversion is how lenders earn their margin. Q4: Are fixed rates always higher than variable rates? Not always. Fixed rates are set by the lender based on the cost of wholesale funding — essentially, what it costs the lender to borrow money for the fixed term. When the market expects the RBA to cut rates, fixed rates can be lower than variable rates because wholesale funding costs are based on the expected future rate path. In July 2026, the lowest 1-year fixed rate of 5.89 percent is roughly equal to the market median variable rate, which means fixed and variable pricing are in equilibrium — neither is clearly cheaper than the other at the outset. The decision comes down to your expectation of future rate moves. Q5: Should I fix for 1, 2, or 3 years? The shorter the fixed term, the closer the fixed rate is to the current variable rate, and the lower the risk of a break cost if your circumstances change. A 1-year fixed term at 5.89 percent provides rate certainty for 12 months with minimal lock-in risk. A 3-year fixed term at 6.09 percent locks in a rate for longer but at a slightly higher starting point. The sweet spot for most borrowers in mid-2026 is a 2-year fixed term at 5.99 percent: it provides 24 months of certainty, the rate premium over variable is negligible (10 basis points), and by the end of the 2-year period the RBA rate outlook for 2027 will be clearer. Data Sources and Methodology This guide uses rate data collected from the following sources as of July 2026: · Ratesniffers — current advertised rates across 46 Australian lenders · Finder — fixed-rate and variable-rate comparison tables · Canstar — product comparison data including comparison rates · RBA — cash rate target and monetary policy statements · APRA — serviceability buffer requirements affecting borrowing capacity Rates are accurate as of the publication date but are subject to change at any time. Always verify current rates directly with the lender or through a licensed mortgage broker before making a lending decision. #fixed vs variable#home loan calculator#rate comparison#fixed rate#variable rate#2026 Not sure what rate you'd get? Ask the AI — free, unbiased, and no sign-up required. It knows current Australian lending rules and can run the numbers for you. Ask the AI assistant → Keep reading Borrowing Power Why your borrowing power dropped in 2026 (and how to lift it)