RBA Rate Hikes in 2026: How Back-to-Back Increases Affect Your Borrowing Capacity

Last updated: 22 March 2026

The Reserve Bank of Australia raised the cash rate to 4.10% on 18 March 2026 — the second consecutive increase since February. In the space of five weeks, the RBA has reversed every interest rate cut made in 2025, and at least one major bank is forecasting a third hike in May.

For borrowers with variable rate mortgages, this is not abstract economics. It is a direct hit to your monthly budget and your ability to borrow. This post breaks down the real numbers, explains who is most at risk, and gives you a practical framework for what to do next.

What Just Happened: The Back-to-Back Hike Explained

After three consecutive cuts through 2025 that brought the cash rate to a more comfortable level, the RBA reversed course sharply in 2026. The February meeting delivered the first hike to 3.85%, and March’s decision — a narrow 5–4 vote — pushed the rate to 4.10%.

The decision was driven by persistently high inflation. Headline CPI came in at 3.8% for the year to January 2026, well above the RBA’s 2–3% target band. Middle East conflict and fuel price pressures were cited as contributing factors in the post-meeting statement, as reported by Domain.

ANZ has publicly forecast a third hike to 4.35% at the May 2026 meeting, according to Canstar’s interest rate forecast tracker. A Finder survey found 84% of economists expect no cuts in the next 12 months. The rate environment has fundamentally shifted.

The Real Dollar Impact on Your Repayments

Every 0.25% rate increase adds meaningfully to monthly repayments. Across two hikes (0.50% total), the cumulative impact is significant — particularly for borrowers with larger Sydney-sized loans.

Here is a guide to the approximate monthly repayment increase from the combined February and March 2026 hikes (0.50% total, based on a 25-year principal and interest loan):

$500,000 loan: approximately $155/month more — $1,860/year
$750,000 loan: approximately $232/month more — $2,784/year
$1,000,000 loan: approximately $310/month more — $3,720/year
$1,200,000 loan: approximately $372/month more — $4,464/year

These figures assume your lender has passed on the full rate increase — which most major lenders have done quickly and in full, as confirmed by Commonwealth Bank’s announcement. If you are unsure what your new repayment is, check your online banking or call your lender directly.

If you are considering refinancing to manage these increases, our refinancing guide explains how the process works and what to look for in a new loan structure.

How Borrowing Capacity Has Shrunk

The rate hikes do not just affect existing borrowers — they dramatically affect what new buyers can borrow. According to Cotality’s housing trends report, each 0.25% rate increase reduces borrowing capacity for a median-income household by approximately $18,000.

That means since the start of 2026, borrowing capacity has fallen by roughly $36,000 for the average Australian household — and if the ANZ-forecast May hike proceeds, that figure becomes closer to $54,000.

For Sydney buyers — where the median house price requires borrowing at the top of most people’s capacity — this is a significant constraint. SQM Research downgraded their Sydney price growth forecast from 4–6% to 2–4% following the March hike, reflecting this exact dynamic: buyers can borrow less, so sellers face more resistance.

Understanding your current borrowing capacity is essential before making any property decisions. Our home loan overview explains how banks calculate serviceability and what factors influence your borrowing ceiling.

Mortgage Stress: What the Roy Morgan Data Shows

Roy Morgan’s latest mortgage stress data — released March 2026 — shows that 26.6% of Australian mortgage holders (1,319,000 households) are now at risk of mortgage stress following the back-to-back hikes. This is up from 23.9% just before the February increase, which was a three-year low.

In Roy Morgan’s methodology, being at risk means a household’s mortgage repayments are consuming more than a defined percentage of after-tax income, leaving insufficient buffer for other living costs. It does not mean default is imminent — but it does indicate financial pressure that compounds with any further income disruption.

The borrower profiles most exposed are:

Owner-occupiers who purchased at peak prices in 2021–2022, before rate increases began
Fixed-rate borrowers who rolled off their fixed term in 2024–2025 onto significantly higher variable rates
Single-income households with limited capacity to increase earnings in the short term
Investors with multiple loans whose aggregate debt-to-income ratio is now under scrutiny from lenders

If you are feeling the pressure, it is worth reviewing your options before the situation becomes urgent. Our home loan preparation guide covers how to assess your financial position and what lenders look for when restructuring debt.

The New APRA Debt-to-Income Cap: Another Layer of Constraint

From 1 February 2026, APRA introduced Australia’s first formal debt-to-income (DTI) cap. Banks are now restricted from issuing more than 20% of new mortgages to borrowers with a debt-to-income ratio of 6x or higher — meaning if you earn $150,000 as a household, your total debt should ideally not exceed $900,000 under this policy.

This does not change how APRA calculates your serviceability buffer (still 3% above the actual rate). But it does affect which lenders will approve high-DTI applications. Because only 20% of any bank’s book can be high-DTI loans, some lenders will exhaust their allocation faster than others. A mortgage broker‘s role is to identify which lenders still have capacity — something that changes month to month.

For property investors in particular, this interacts directly with the rate environment. Higher rates increase assessed repayments; higher assessed repayments push DTI ratios up; higher DTI ratios trigger the APRA cap. Investors considering adding to their portfolio need to model this carefully. Our property investment guide covers the financial structuring considerations in more detail.

What Borrowers Should Do Right Now

The combination of higher rates, reduced borrowing capacity, and tighter lending policy creates a more complex environment — but it is navigable with the right approach.

Review your current rate immediately

If you have not reviewed your variable rate since the February hike, you may be paying more than necessary. Lenders compete actively for refinances, and a 0.20–0.40% improvement on your rate is not unusual for a borrower in good standing.

Model your capacity under a 4.35% scenario

If ANZ’s May hike forecast eventuates, your borrowing capacity falls by another $18,000. Buyers stretching to the upper limit of current capacity should understand what their position looks like under that scenario before committing to a purchase.

Consider your fixed versus variable split

With another hike potentially weeks away, some borrowers are moving to split loans — fixing a portion of their debt to lock in certainty while retaining flexibility on the remainder. This is a nuanced decision that depends on your loan size, term, and plans. There is more detail in our post on refinancing your home, and it is worth a dedicated conversation with a broker.

Do not make decisions under panic

Rate hikes are stressful — but decisions made under financial pressure are rarely optimal. If you are currently in mortgage stress, the first step is a structured assessment of your options: refinance, restructure, extend the loan term, or access equity. Each has trade-offs that depend on your specific circumstances.

Frequently Asked Questions

How much extra will I pay per month after the back-to-back hikes?

On a $700,000 variable rate loan, the two 0.25% hikes add approximately $215–$220 per month to your repayments, depending on your remaining loan term. Use an online repayment calculator or ask your lender for an updated repayment schedule.

Will my bank automatically pass on the full rate increase?

Most major banks pass on RBA hikes in full and within a few business days. Smaller lenders vary. Check your lender’s announcement directly — your new rate should be disclosed in writing.

Is now a good time to fix my rate?

Fixed rates already price in market expectations of future hikes, so locking in does not automatically mean avoiding the impact. Whether fixing makes sense depends on your loan size, how long you plan to stay in the property, and your cash flow flexibility. This deserves a proper conversation rather than a generic answer.

Can I still borrow to invest in property with the new APRA rules?

Yes — but your DTI position needs to be assessed carefully. Some lenders still have capacity to approve high-DTI loans; others have already hit their 20% quota. A broker can identify which lenders are most likely to approve your specific application.

Let’s Review Your Position Together

The rate environment has changed materially in 2026, and what worked financially six months ago may need to be reassessed. At Lagos Financial, we work with borrowers across Sydney and Tasmania to navigate exactly these conditions — reviewing existing loans, identifying refinancing opportunities, and modelling capacity under different rate scenarios.

Book your complimentary assessment today and we will take a clear-eyed look at where you stand, what your options are, and how to protect your financial position if rates rise further in May.