Net profit at KBC Bank Ireland more than doubled for the three months ending June to €39.5m, from €17.8m for the same period last year.
This contributed to a net profit of €73.7m for the first half of 2016.
Operating profit at KBC Ireland rose €8m during Q2 to €38.8m, when compared with the same period in 2015.
The bank’s capital position at end of Q2 saw a capital ratio of 13.2%.
Between April and June the value of impaired loans at the lender fell by 14% to €6.1 billion, from €7.1 billion at the same time last year.
KBC said it attracted 16,200 new customers in the second quarter, bringing the total of new accounts for the first six month of 2016 to 33,000.
The bank said this growth was driven by switcher campaigns and lower mortgage rates.
Overall, KBC Group reported net profit of €721m for Q2, a rise of €55m on the same time in 2015.
Chief Executive of KBC Bank Ireland Wim Verbraeken said he was “pleased that our positive start to the year has gathered momentum and resulted in a very strong second quarter”.
He added: “We are focused on growing with our customers, staff and working with our communities and consolidating our reputation for a quality banking experience with an innovative edge.”
On impaired loans, Mr Verbraeken said: “While we have made significant progress in offering resolutions to 95% of our distressed customers, we continue to work closely with any customers in financial difficulties to try and reach suitable, sustainable resolutions.”
KBC Bank Ireland has more than 1,000 employees across Dublin, Cork, Galway, Limerick, Kildare, Waterford, Wicklow, and Kilkenny.