CommBank · rate lock
Holds the rate for 90 days.
CommBank calls it the Rate Lock. The fee is $750. Non-refundable, debited when the request is processed, and a second fee applies if you change the fixed term and lock again. New fixed loans of one to five years only; not switches, splits or top-ups. If rates fall you don't automatically get the lower rate: you can break the lock and take the settlement-day rate, but the fee stays paid. The rate on the day CommBank receives the signed Rate Lock consent from every applicant, held for 90 days from processing. We read CommBank’s own page on 22 September 2026 and quote it below.
CommBank’s own page on rate lockA flat fee is the same whatever you borrow. Against it, what a quarter-point rise before settlement would cost over a three-year fixed term.
| Fixed loan | CBA lock fee | +0.25% for 3 years |
|---|---|---|
| $400,000 | $750 | $3,000 |
| $600,000 | $750 | $4,500 |
| $800,000 | $750 | $6,000 |
| $1,000,000 | $750 | $7,500 |
The right-hand column is the extra interest over three years if the fixed rate rose a quarter of a point between application and settlement and you hadn’t locked. It is the cost the lock insures against, not a prediction.
From the page we read, so you can check us.
CommBank — Rate Lock
“The CommBank Rate Lock fee is $750. The Rate Lock fee will be debited from your Related Account when the Rate Lock request is processed. The 90 days commences when the Rate Lock request is processed.”
Every lender we checked, on the same $600,000 loan.
$750. CommBank's own page says: "The CommBank Rate Lock fee is $750. The Rate Lock fee will be debited from your Related Account when the Rate Lock request is processed. The 90 days commences when the Rate Lock request is processed." Non-refundable, debited when the request is processed, and a second fee applies if you change the fixed term and lock again. New fixed loans of one to five years only; not switches, splits or top-ups. If rates fall you don't automatically get the lower rate: you can break the lock and take the settlement-day rate, but the fee stays paid. Checked 22 September 2026.
90 days from the day the lock is applied. If the loan hasn't settled by then, the lock lapses and you settle at the fixed rate on the day, unless CommBank agrees to extend it. Ask before you pay if your settlement is further out than that.
The rate on the day CommBank receives the signed Rate Lock consent from every applicant, held for 90 days from processing. If fixed rates fall before settlement, ask whether you get the lower rate; most lenders pass it on, but the fee is not refunded.
On a $600,000 loan a 0.25 percentage point rise costs about $125 a month, or roughly $4,500 over a three-year fixed term. Against a fee of $750, one rate move between application and settlement covers it. It is worth it when settlement is weeks away and rates are expected to hold or rise; it isn't on a quick refinance when they are falling.
Yes. ING charges $749, Ubank charges $500, Bendigo Bank locks for free. The full table is on the rate lock page.
Checked against CommBank’s own page on 22 September 2026. Lenders change fees and lock periods without much warning; if something here doesn’t match what they’ve told you, theirs is right and we’d like to know. Arthr Pty Ltd provides marketing and lead-generation services only; credit assistance is provided by 1st Street Pty Ltd, Credit Representative 490057 under Australian Credit Licence 389328.
The lock fee only matters if the fixed rate is worth taking. The rate monitor shows where CommBank’s rates sit against every lender on the panel, and a broker at 1st Street can tell you whether a package waives the fee.