The present invention is directed towards systems and methods for form-based single sign-on by a user desiring access to one or more protected resources, e.g., protected web pages, protected web-served applications, etc. In various embodiments, a single sign-on (SSO) module is in operation on an intermediary device, which is disposed in a network to manage internet traffic between a plurality of clients and a plurality of servers. The intermediary device can identify an authentication response from a server and forward the authentication response to the SSO module. The SSO module can complete a login form in the authentication response with a client's authentication data, return the completed login form to the server and forward cookies associated with the authentication response to the client. In various embodiments, multiple login forms can be completed, transparently to the client, by the SSO module on a client's behalf and reduce time expended by a client in obtaining access to protected resources.