The EWS certificate is valid for one year from the date of issue. However, it can be renewed upon submission of a fresh application form and supporting documents because The Certificate of Income and Assets is valid for one year. Typically, it takes a maximum of 21 days from the day you submit your application.if the EWS certificate is issued in any month of the year, then it is valid till the 31st of March of the next year.so your certificate is valid till this date only.