Background: To retrospectively analyze post renal transplant patients to determine the frequency of BK-Virus infection, treatment and complication at Institute of Kidney Diseases Hayatabad, Peshawar. Methodology: This was a cross sectional (retrospective) study from January 2008 to January 2021 conducted at Institute of Kidney Diseases, Peshawar, Pakistan. Clinical Records and laboratory data were collected. BK viral load was obtained by quantitative DNA-polymerase chain reaction (PCR) testing of blood. Results: Total of 263 patients were assessed. Out of 263, 246 (93.54%) were males and 17 (6.46%) were females with mean age 32.06 ± 5.49. All patients underwent live related transplant. BK-Virus plasma PCR was positive in 15 (5.70%) in post renal transplant patients after 6 months. Conclusion: The BK-Virus infection is very common in post renal transplant patients who have received induction therapy and on intense immunosuppression. Effective Treatment is by reducing the immunosuppressive drugs to minimal level.