For MyPaychex users whose company runs Payroll with Paychex: You can use Paychex Flex ® to access your applications. Sign-up for your account at www.paychexflex.com.If you’re an administrator who has not yet created your Paychex Flex account, please contact your Paychex Representative for assistance., 1 By consenting to receive text messages you are agreeing to receive sales, marketing and promotional messages from Paychex at the number provided, including messages sent by automated means. Your consent supersedes any previous notification to either not receive or stop receiving text messages. Consent is not a condition of purchase or of participation in promotional or discount programs., , The free Paychex Flex Mobile App enables you to turn a smartphone or tablet into a time clock. Employees get a fast, easy experience while owners gain access to payroll, HR, and other services to manage the business while on the go., You will need the email address associated with your Paychex Flex account. To retrieve your username: Select I Forgot My: Username. (1) Enter your email address associated with your Paychex Flex account, then click Continue.; Check your email account for an email containing your username.; Note: you may need to check your spam folder for an email from noreply@paychex.com if you have filters or , The cost of running payroll for one employee can vary based on factors like whether you manage it yourself or outsource to a provider. Handling payroll in-house may seem like you’re saving money, but it requires time for things like tax filings, while outsourcing can streamline the process and free up time for other business priorities..