Private-sector lender RBL Bank on Thursday reported a 38.8% year-on-year increase in net profit to Rs 247 crore in Q4FY19 due to better net interest income (NII) and other income. However, provisions grew 77% y-o-y to Rs 200 crore on account of credit card write-offs made by the bank. \u201cThe majority of our retail business growth comes from our credit card business and whenever there is a default we make a 100% provision,\u201d Vishwavir Ahuja, MD, RBL Bank, said. The lender\u2019s asset quality, however, remained unchanged quarter-on-quarter with gross non-performing assets (NPAs) of 1.38%. The provisioning coverage ratio (PCR) stood at 65.3%, while the net NPA at 0.69% was 3 bps lower than in Q3FY19. RBL\u2019s profits were led by a healthy increase in the interest income which grew 47.6% y-o-y to `738 crore and a 31% y-o-y increase in non-interest income, driven by an increase in the core-fee income from the growing credit card customer base, the management said. Core fee income grew 43% y-o-y to `409 crore, accounting for 93% of the non-interest income. Pre-provisioning profit grew 46% y-o-y to `560 crore and net interest margins were at 4.2%, a 25 bps increase over the previous year and is at an all-time high. Total advances as at the end of Q4FY19 stood at `54,308 crore, up 35% y-o-y and grew 9% q-o-q from `49,892 crore. The bank\u2019s capital adequacy ratio (CAR) stood at 13.46% under Basel 3 against 15.33% in the year-ago period. The minimum CAR under Basel 3 norms stands at 8%. Total deposits rose 33% y-o-y to `58,394 crore. The current accounts savings accounts (CASA) deposits grew by 37% y-o-y, while the CASA ratio improved marginally to 24.98% in Q4FY19 against 24.32% in the previous quarter.