Introduction:Acute renal failure is associated with high mortality and it also has effect on the risk of death (1). Acute kidney injury is generally defined as ‘an abrupt and sustained decrease in kidney function Objectives: 1. To find out the mortality and morbidity associated with AKI in hospitalized patients 2. To assess the outcome of AKI with requirement of haemodialysis (HD) 3. To assess the ability of RIFLE AND AKIN classification to prognosticate AKI.. Methods: A total of 65 patients over a period of 18 months with an absolute increase in serum creatinine >0.3 mg/dl(26.4> 4 μmol/l) or a percentage increase in serum creatinine ≥50% (1.5–fold from baseline) or a reduction in urine output (documented oliguria < 0.5 ml/kg/hour for > 6 hours) Results: The study group contains 65 patients(37 males and 28 females).The most common etiology was sepsis followed by urinary tract infection. Diabetes was one of the common comorbidity present in our study.10 patients required mechanical ventilator. In our present study 21 patients required haemodialysis and 44 patient was conservatively managed. Among these many patients four patient died during our study period. In our present study AKIN criteria allowed the identification of more patients as having acute kidney injury and detecting early requirement of haemodialysis Conclusion: In our study AKIN is a better predictor for assessing the need of hemodialysis compared to RIFLE criteria .