Maiyo, Julia ; Mumia Benn MINCU, CPA.K2021-03-242022-06-072021-03-242022-06-072018https://ikesra.kra.go.ke/handle/123456789/1326PROJ 354.2 MAISingle window is one of the latest port systems aimed at simplifying trade processes for Kenya’s competitiveness at the port of Mombasa. In the year 2007 the country experience growth in international trade which increases the number of containers handled by KPA and those cleared by KRA customs at the port of Mombasa. The space was limited and vessel turnaround time was prolonged, traders incurred huge cost in business, processing of customs clearance takes more than 11 days prolonging cargo dwell time, diversion to neighbouring country like Tanzania Dar-es-salam port by some shipping line happens, therefore Kenyan government on modernization reforms in customs adopted Kenya National Electronic Single Window to facilitate electronic clearance of goods and this study was carried out to establish the effect of Kenya national electronic single window system on performance at the port of Mombasa. A target population of 1090 employees of different organization was used, which included Kentrade Mombasa, KPA, and KRA customs, KBS, KMA, Shipping agents and Clearing agents. A descriptive research design was adopted and systematic random sampling method was used to pick the sample size from 10% of the target population. Primary data was gathered using semi-structured questionnaires and data was analysed using both descriptive and inferential statistics. The findings revealed that, there was high positive correlation between the dependent variable and independent variables at 0.01 level of significance which was within the threshold P-value of 0.01 as per the Pearson Correlation. Therefore; this study concluded that, there is high positive correlation between manifest module, permit module and e-payment module on performance at the port of MombasaenPort performanceManifest modulee-payment modulePermit moduleProjects