McEwan, who was appointed CEO of the state-backed lender a year ago, is looking to re-establish RBS's reputation among customers following its 45 billion pound ($72 billion) government rescue during the 2008 financial crisis.

He said "more work is needed to challenge the bonus culture" that had damaged the image and conduct of retail and commercial banking in the UK and also wanted to rebuild trust by talking about the impact of higher rates.

"We know that our mortgage customers are concerned that they might not be able to balance their household budgets when the day comes, even if that is some time well into the future," McEwan said.

"I am signaling to our customers that in the months ahead we will listen to your concerns. We want to talk to you about the state of your finances," he added.

(Reporting by Matt Scuffham; Editing by Steve Slater)