Financial turmoil in Europe would continue to be a threat over the global banking sector, although Australasian banks' reliance on offshore funding had fallen.
"They will be looking at it [Europe] very closely. At the moment they are able to borrow at reasonable rates from offshore and from the public here because there hasn't been a lot of bad news out of Europe lately."
Banks would also be carefully watching the Auckland housing price bubble.
"I'm astounded how quickly the Auckland housing market has heated up so fast. I don't want to be a doomsayer but I would hope we've learned from last time."
Kensington said the swing to floating mortgages rather than fixed loans had allowed banks to improve profitability as administrative costs fell and they were quickly able to respond to the cost of wholesale funding.
Dowling said the Australasian banks were borrowing about 60 per cent of their funds locally and the remainder offshore, a reversal of the pre-financial crisis ratio.
Senior lecturer in banking at Massey University Claire Matthews said banks were able to make savings as more consumers used electronic banking. She said a boost in profitability was an early sign of economic recovery.