Background-Assessments in education should be reliable, acceptable and cost effective. Formative assessment motivates and guides the student through learning with effective feedback. Regular formative assessments improve performance in the summative assessment. Objectives-- To study the effect of continuous formative assessment on summative assessment in the study group and to compare the scores of summative assessment between control and study groups of first year MBBS students. Materials and methods-50 first year MBBS students were divided randomly into two groups of 25 each (study group and control group).The study group underwent weekly formative assessments on the topics covered in the week. Both the groups underwent the summative assessments. A questionnaire was designed, pretested and finally used to record different opinions of the students and data was collected, analysed and interpreted. A cross sectional descriptive study was conducted in 2019 for the 2018-19 Batch of MBBS students Results- The summative scores of study group compared to control group is highly significant. (Independent student’s t-test t=3.54, df=48, p=0.001. Conclusion-Formative assessments with regular feedback improve performance in the summative assessment.