Big four vs mortgage broker: who actually gets better rates in 2026

Australian borrowers have two realistic paths to a home loan: walk into a big-four branch or route the same file through a mortgage broker. In April 2026, those two paths produce measurably different outcomes, but the size of the gap depends entirely on your file.

Where the big four still win

Long-standing customers with a clean repayment history, low LVR and a packaged offering (credit card, savings, super, insurance) can usually extract a retention discount of 15-25 basis points without much argument. That conversation takes a phone call. Branches with lending authority can also authorise small policy exceptions - an extra $20k on servicing, say, or a three-month interest-only holiday - without escalating.

Where brokers win decisively

Anything non-vanilla. Self-employed applicants with two good years and one bad. Non-residents. 482 or 485 visa holders. Portfolios of three or more properties. Files with a recent credit event or a thin credit file after returning from overseas. In these cases, the difference between lender A (which declines) and lender B (which approves at an 80 bps discount) is not pricing - it’s policy, and policy is what a broker is paid to navigate.

On rate specifically, in April 2026 a broker putting a clean owner-occupier file with 80% LVR, $700k loan, PAYG employment and a 6-month savings history in front of a non-big-four lender can typically land 40-60 bps below the big-four headline rate. Over a 30-year loan, 50 bps is about $84,000 in total interest.

The catch with broker-sold loans

Brokers earn an upfront commission (0.55-0.70%) and a trail (0.15%) from the lender. That commission is priced into the product, so in theory you could go direct to the lender yourself. In practice, retail pricing at the bank teller is generally higher than broker pricing - the big four run separate retail and third-party pricing sheets, and broker prices have been the sharper set for the last decade.

The real question

For most owner-occupier, PAYG, LVR-under-80% files: both paths work, and the gap is 10-30 bps. For anything complex, the broker path is meaningfully more likely to produce an approval at all, and the rate gap widens.

If the loan is straightforward and you are comfortable spending an afternoon on the phone to three or four retention desks, doing it yourself can save the trail commission and sometimes produce equivalent pricing. If any part of your file is non-standard, a broker will almost always land a better outcome.