Australian businesses will benefit just as much as home loan borrowers if the Reserve Bank delivers a widely anticipated interest rate cut next week which would bring the cash rate down from its 13-year-high, Commonwealth Bank boss Matt Comyn says.

Record lending for home loans and businesses over the six months to December 31 and ultra-low bad debts helped CBA deliver a $5.13 billion first-half profit on Wednesday. The result stoked optimism around the outlook for loan arrears across the economy and propelled the CBA share price to a record high of $165.98.