* Q1 net profit 4.79 billion euros, including accounting gain
* Sees cost of risk of new bank under 50 bps in 2021 vs 77 bps
* Net interest income under pressure, gross income up (Recasts, adds detail on costs, share price)
MADRID, May 6 (Reuters) - Caixabank’s net profit jumped almost six-fold in the first quarter and the bank tentatively lowered its guidance on pandemic-related costs, providing a boost as it integrates the purchase of Bankia.
Net profit without accounting gains reached 514 million euros ($617 million) in January-March compared to 90 million in the same quarter a year ago, beating analysts’ average forecast of 342 million euros, after the bank did not set aside any provisions against the impact of COVID-19.