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Market Share & Routing
The 2026 Prime-File Routing Map
How the market re-sorted around speed, policy, and broker experience.
Westpac’s share — down from 23.9% in 2019
CBA’s consolidated share of the mortgage market
Total Australian mortgage market size
Westpac’s share decline since 2019
Five Prime-File Tiers
Clean, simple, time-sensitive
Route to fastest formal approval — typically Macquarie, NAB as strongest major behind.
Prime, complex structure
CBA and ANZ have built complex-structure teams — match the file before submission.
Borderline serviceability
High-DTI cap compresses major-bank capacity; non-banks with broader appetite often fit better.
Investment structure
Macquarie, Westpac, and CBA new-customer book have stepped back. Specialist non-banks and second-tier lenders are now the workable panel.
Refinance with retention risk
Get the new file fully approved before discharge lands at the incumbent — beat the retention intercept.
Quick test: if more than 60% of recent files went to one or two lenders, your routing model is probably not optimal in a 2026 market.
Routing Helper
Prime File Routing Quick-Pick
Answer three quick questions about the file. A routing tier appears at the bottom.
Westpac's Market Share Bleed: What a 3.2-Point Drop Tells Brokers About Where to Send Prime Files in 2026
Westpac's share of the $2.46 trillion Australian mortgage market has fallen to 20.7 per cent — a 3.2 percentage point drop from 23.9 per cent in March 2019. Over the same period, Commonwealth Bank has consolidated its position at 25.4 per cent, lifting from 25.1 per cent, and Macquarie has continued its multi-year ascent. Non-banks have absorbed a meaningful share of prime borrower flow that previously sat with the majors. The market has clearly re-sorted, and the implication for brokers is not commentary — it is a routing question.
Where should a prime file go in 2026? The answer matters more than it did three years ago because the lender response time gap between leaders and laggards has widened, retention teams have become more aggressive, and pricing for prime borrowers now varies meaningfully across the four-major-plus-Macquarie-plus-non-bank universe. The broker who routes by habit will write loans more slowly, at less competitive pricing, and with higher post-settlement attrition than the broker who routes by current market reality.
What the market share data is actually telling brokers
Westpac's slide is not the story of a single year. It is a structural shift across the past six years that the broker channel has registered more quickly than the lender. Several factors are visible in the numbers.
Macquarie has consistently led the broker channel on turnaround, BDM access, and broker experience metrics — and brokers have routed prime files toward the lender that returns formal approvals fastest. The compounding effect across hundreds of thousands of broker-led applications is material.
CBA has held share through pricing, technology investment, and a proactive retention model. Its $1 billion fraud probe is a separate story; on volume, the bank has remained the dominant home loan player.
Westpac has lost ground through a combination of slower turnaround, less competitive pricing on prime, and a perception in the broker channel that its appetite has narrowed even within prime. Until that perception shifts in the data, the share trend is likely to continue.
Non-banks have absorbed prime borrowers that previously defaulted to a major. Brighten, Pepper, Resimac and others have built broker-facing experiences that compete on speed and policy clarity rather than headline rate. The flow has followed.
A 2026 routing model for prime files
The lender map below is not a recommendation for any specific lender. It is a mental model brokers can apply to each prime file before submitting, taking account of the current state of pricing, policy, and operational performance.
Tier 1 — Prime, clean, simple, time-sensitive
These files reward speed. A PAYG borrower with a single stable income source, a clean liability picture, and an LVR under 80 per cent should go to the lender returning the fastest formal approval on the broker's recent submission record. In mid-2026, that lender is usually Macquarie for files that match its credit appetite, with NAB as the strongest major performer behind it. Both will close in days rather than weeks if the file is complete.
Tier 2 — Prime, complex structure
Where the file involves split loans, multiple guarantors, complex security, or moderate LVR exception requests, the routing question shifts. Macquarie's appetite for complex structure is narrower than its appetite for clean files. CBA's complex-structure team is well-resourced. ANZ has invested in its complex-structure handling. Brokers should know which lender each individual complex file fits before submission rather than relying on a default.
Tier 3 — Prime but borderline serviceability
The APRA high-DTI cap has compressed available capacity for borrowers above the 6x DTI line. Where a prime borrower's DTI sits at the edge, the major banks' internal quotas — many running tighter than APRA's 20 per cent cap — mean these files are increasingly being declined or repriced by lenders who already have high-DTI capacity at quota. Non-banks with broader DTI appetite, or majors with available quota at the start of a quarter, are better fits.
Tier 4 — Prime, investment structure
The pullback from company and trust structure lending at Macquarie, Westpac, and CBA's new-customer book has narrowed the available lender panel for investment files. Specialist non-banks, second-tier banks, and a handful of mutuals now hold most of the workable capacity in this segment. Pricing reflects the narrower competition. Brokers servicing investment-heavy books should be actively building relationships with these lenders, not relying on relationships built when the majors were active.
Tier 5 — Prime refinance with retention risk
When a prime borrower's loan is with a major and the broker is refinancing them out, the retention team is now an active participant. Brokers should pre-empt the discharge intercept by ensuring the file at the new lender is fully approved before the discharge authority lands at the existing lender. Routing to a lender that can close inside the retention team's intervention window is now part of the strategy.
The pricing reality for prime in 2026
Headline rate is no longer a reliable proxy for the best deal on a prime file. Brokers should be modelling the total cost of the loan over the borrower's expected hold period, including cashback (where compliant with BID), annual fees, offset arrangements, and the rate trajectory the lender is signalling. The lender with the lowest headline rate on a comparison sheet is frequently not the lender producing the lowest total cost over three years.
This calculation is where the better non-banks have built share. Their pricing model on prime is genuinely competitive once the cashback noise is removed, and their service delivery does not impose the kind of post-settlement servicing cost that erodes broker trail.
What this means for broker positioning
The market share data also has implications for how brokers position their own service to clients. A broker who consistently routes to the same one or two lenders — regardless of file type — is hard to differentiate from a direct branch experience. A broker who can articulate a 2026 routing model, demonstrate why a specific lender suits the client's specific file, and document the BID reasoning around that recommendation is operating at a different level.
ASIC's BID review has confirmed that the reasoning behind lender selection is now a regulatory artefact, not just a sales narrative. Brokers who can show their file notes record an explicit comparison against three or four credible lenders, and an explanation of why the chosen lender fits the client's circumstances, are in compliance and competitively differentiated at the same time.
A practical exercise for this week
Brokers who want to test their own routing model can run a short exercise: take the last twenty files written, list the lender each was placed with, and ask whether the routing decision was made by current performance or by habit. If more than 60 per cent of recent files went to one or two lenders, the routing model is probably not optimal in a 2026 market. A broader, performance-led routing approach will improve turnaround, pricing, and BID defensibility together.
What to watch next
Two signals will tell brokers whether the share trends continue. First, Westpac's strategic response — the bank has hinted at investment in broker-channel improvements. If those land, share decline may stabilise. Second, the non-bank flow — if Pepper, Resimac, Brighten and others continue to capture prime, the major banks will reprice or tighten serviceability to compete. Either response affects file routing.
Conclusion
Westpac's 3.2 point share decline is the loudest signal of a market that has re-sorted around speed, policy, and broker experience. Brokers who build a tiered routing model for prime files — and who keep it current as lenders shift their appetite — will write more loans, at better pricing, with less rework. The brokers who continue to route by habit will spend the rest of 2026 explaining why their clients are seeing slower outcomes than the clients of brokers who route by current data.
Disclaimer: This article is for general information and professional development purposes only. It does not constitute legal, compliance, or financial advice. Brokers should consult their aggregator's compliance team and, where required, seek independent legal advice regarding their obligations under the National Consumer Credit Protection Act 2009 and ASIC's responsible lending guidelines.
