How do interest rates affect your borrowing power in 2026? Learn how much you can borrow with the RBA cash rate at 4.10% and strategies to maximise capacity.
If you've ever wondered how much can I borrow for a home loan, the answer isn't as straightforward as multiplying your salary by a magic number. Australian lenders use a detailed assessment process that considers your income, expenses, existing debts, and — critically — a built-in safety margin called the serviceability buffer.
Here's what lenders look at when calculating your borrowing capacity in Australia in 2026:
The Australian Prudential Regulation Authority (APRA) requires all lenders to assess whether you could still afford your repayments if interest rates were 3 percentage points higher than the actual rate on your loan. This is known as the serviceability buffer, and it's been locked at 3% since October 2021.
So if a lender is offering you a variable rate of 6.50%, they're actually testing whether you could handle repayments at 9.50%. That's a massive difference when it comes to how much you can borrow. For a household earning $120,000 per year, this buffer alone can reduce your maximum loan amount by $80,000 to $100,000 compared to being assessed at the actual rate.
Lenders also use the Household Expenditure Measure (HEM) as a baseline for your living costs. HEM estimates the minimum spending a household needs based on family size, income, and location. If your declared expenses are lower than HEM, lenders will typically use the HEM figure instead. If your actual spending is higher — say you've got hefty childcare costs, private school fees, or significant lifestyle expenses — the lender will use the higher number.
Every dollar you owe elsewhere directly reduces your borrowing power. Lenders account for:
Lenders don't simply take your gross salary and run with it. They'll look at your base income, then apply their own rules for variable income sources like overtime, commissions, and rental returns. Some lenders only count 80% of overtime income, while others may exclude it entirely if you can't demonstrate a two-year track record. For self-employed borrowers, most lenders want to see two years of tax returns and will average your income across those years — which can work for or against you depending on your trajectory.
Understanding these moving parts is the first step toward knowing your true interest rates borrowing power position. The good news? A mortgage broker can help you optimise every element before you apply.
The relationship between interest rates and borrowing power is inversely proportional — when rates go up, your borrowing capacity goes down. But what surprises most buyers is just how much each small rate movement affects the numbers.
As a general guide, for a typical household earning around $120,000 per year with standard expenses and no other major debts, every 0.25% increase in the cash rate can reduce your borrowing power by approximately $15,000 to $20,000. That might not sound catastrophic on its own, but rate rises rarely come in isolation.
Let's look at this in practical terms for a couple earning a combined $150,000:
That's a reduction of around $80,000 from just a 1% rate increase. In suburbs like Williams Landing and Point Cook, where median house prices sit between $879,000 and $950,000, that gap could be the difference between securing the home you want and missing out entirely.
It's important to understand that rate impacts aren't just about the rate itself — they compound through the serviceability buffer. When lenders add the 3% APRA buffer on top of a higher actual rate, the assessment rate climbs to levels that dramatically squeeze your capacity. A borrower assessed at 9% faces a very different outcome to one assessed at 10.5%, even though the real-world rate difference is just 1.5%.
Beyond borrowing capacity, rising rates affect your actual repayments. On a $700,000 loan over 30 years:
That's an additional $5,520 per year in repayments from a single percentage point rise.
For buyers targeting suburbs like Williams Landing and Point Cook, where median house prices have climbed significantly over the past year, the combination of rising property values and rising interest rates creates a double squeeze. Your borrowing capacity is shrinking at the same time as the price tag on the home you want is growing. This is why many buyers who were comfortable six months ago are now finding themselves priced out — not because they earn less, but because the maths has fundamentally shifted.
If you're feeling the pinch, you're not alone. But understanding the relationship between interest rates and borrowing power is the first step toward making smarter decisions about when and how to buy. Speak to Brokio for a current assessment of your position.
As of March 2026, the RBA cash rate sits at 4.10% following two consecutive rate increases — 25 basis points in February and another 25 basis points on 17 March 2026. This marks a sharp reversal from the three rate cuts that preceded them, and it's caught many prospective buyers off guard.
After a period of easing through late 2025, where the RBA delivered three consecutive rate cuts to stimulate the economy, persistent inflation driven by global fuel and supply chain pressures forced the central bank to change course. Reserve Bank Governor Michele Bullock has stated that while the Board isn't aiming to push Australia into recession, controlling inflation remains the top priority.
For context, here's the recent cash rate trajectory:
All four major banks — CBA, Westpac, NAB, and ANZ — have passed on the March rate increase in full to variable rate borrowers. This means most variable home loan rates now sit between 6.40% and 6.80%, depending on the lender and product. With the 3% serviceability buffer, borrowers are being assessed at rates approaching 9.40% to 9.80%.
The back-to-back hikes have created real uncertainty for buyers in Melbourne's west and across Australia. If you were pre-approved at a lower rate three months ago, your pre-approval may no longer reflect your actual borrowing capacity. Lenders reassess at current rates when you formally apply, which means a pre-approval from late 2025 could overstate what you can actually borrow today by $30,000 to $50,000.
APRA has also introduced a new debt-to-income (DTI) cap from February 2026, limiting banks from issuing more than 20% of new loans to borrowers with a DTI ratio above six. This adds another layer of constraint for buyers in higher-priced suburbs like Point Cook and Williams Landing, where larger loan sizes are common.
Market economists remain divided on whether the RBA will hike again at its May 2026 meeting or pause to assess the impact of the two recent increases. Either way, borrowers should prepare for the possibility that rates could remain elevated — or move higher — through the middle of the year. The era of cheap money is firmly behind us.
The takeaway? Borrowing capacity in Australia in 2026 is tighter than many expected. If you're planning to buy, it's more important than ever to get an accurate, up-to-date assessment of your position — not rely on numbers from even a few months ago. Contact Brokio to understand exactly where you stand in today's rate environment.
One of the most common questions we hear at Brokio is whether choosing a fixed or variable rate will give you greater borrowing power. The answer is more nuanced than you might expect, and in the current 2026 rate environment, it matters more than ever.
When you apply for a variable rate home loan, lenders assess your capacity at the current variable rate plus the 3% APRA serviceability buffer. With most variable rates sitting around 6.40%–6.80% in March 2026, this means you're being assessed at approximately 9.40%–9.80%.
The advantage of variable is flexibility — you can make extra repayments, access offset accounts, and benefit if rates drop. The disadvantage for borrowing power is that lenders use the full buffer on top of an already-elevated rate.
Fixed rate loans are assessed slightly differently. Lenders apply the serviceability buffer to either the fixed rate or an internal benchmark rate — whichever is higher. In some cases, this can work in your favour:
Many savvy borrowers in Melbourne's west are opting for a split loan — fixing a portion of their mortgage for rate certainty while keeping the remainder on variable for flexibility. This doesn't always improve your borrowing power directly, but it can help with:
In the current March 2026 environment, we're seeing some lenders offer 2- and 3-year fixed rates that are marginally below their standard variable products. For buyers close to their borrowing limit, switching to a fixed or split structure could unlock enough additional capacity to bridge the gap — particularly in suburbs like Williams Landing and Point Cook where property prices demand larger loans.
The key is comparing not just the rate, but how each lender assesses that rate for serviceability. This is exactly where a broker's access to multiple lenders' policies becomes invaluable. Chat with Brokio to find out which structure maximises your capacity.
Even in a rising rate environment, there are proven strategies to increase your borrowing power and improve your chances of securing the home you want. Whether you're a first home buyer in Point Cook or upgrading in Williams Landing, these tactics can make a genuine difference to your borrowing capacity in Australia in 2026.
This is the single most impactful thing you can do. Every existing debt reduces what lenders will offer you:
A 30-year loan term results in lower monthly repayments compared to 25 years, which means lenders assess your capacity more favourably. While you'll pay more interest over the life of the loan, the increased borrowing power can be the difference between affording the home you want and falling short. You can always make extra repayments later to reduce the total interest paid.
Lenders love seeing diversified income. Consider:
Lenders examine your bank statements closely. In the 3–6 months before applying:
If a family member is willing to use their property as additional security, a guarantor arrangement can eliminate the need for Lenders Mortgage Insurance (LMI) and allow you to borrow with a smaller deposit — or increase the total amount available to you. This is particularly popular with first home buyers in Melbourne's west.
Not all lenders assess borrowing power the same way. Some are more generous with overtime income, rental income, or expense calculations. Book a free consultation with Brokio to find the lender whose policies work best for your specific situation.
Navigating interest rates and borrowing power in 2026 is more complex than it's been in years. With the RBA cash rate at 4.10%, a 3% serviceability buffer, new DTI caps, and lender policies that vary wildly between institutions, having the right broker in your corner isn't a luxury — it's a genuine competitive advantage.
Brokio is a mortgage broker based right here in Williams Landing, serving buyers across Point Cook, Truganina, Tarneit, Werribee, and Melbourne's broader western suburbs. We understand the local property market intimately — from the median prices and auction trends to the specific challenges that buyers in our area face when it comes to borrowing capacity.
Here's how we help maximise your borrowing power:
We've helped hundreds of families across Melbourne's west purchase their first home, upgrade to a larger property, or refinance to a better deal. In the current environment, our clients consistently tell us they wouldn't have known how much they could actually borrow — or how to improve their position — without professional guidance.
If you're wondering how much can I borrow in today's rate environment, don't guess — and don't rely on generic online calculators that can't account for your specific circumstances. Book a free consultation with Brokio today and we'll provide a personalised borrowing power assessment based on current lender policies, the latest RBA cash rate, and your individual financial situation.
Whether you're a first home buyer in Point Cook, upgrading in Williams Landing, or looking to refinance before rates move again, Brokio is your local expert in making every dollar of borrowing power count. We're based in Williams Landing and available for face-to-face or virtual consultations — whatever works best for you.
Ready to find out your true borrowing power? Contact Brokio for a free, no-obligation chat today.
Ready to explore tailored loan options? Contact Brokio today and let us guide you through your mortgage, car loan, personal loan, or investment property loan journey with confidence.
