This is the upgrade doc: https://confluence.atlassian.com/adminjiraserver071/upgrading-jira-applications-802592251.html
As for costs, if you've been paying for renewing the maintenance and support, there's no additional cost. Otherwise, you'd have to pay for that and all plugins that need to be upgraded. That would ordinarily be 50% of the purchase price at your user tier. You can upgrade to whatever version was released during the maintenance window.
That's all explained in the Pricing FAQ
Send an email to sales@atlassian.com and they will get back to you with more information.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
Online forums and learning are now in one easy-to-use experience.
By continuing, you accept the updated Community Terms of Use and acknowledge the Privacy Policy. Your public name, photo, and achievements may be publicly visible and available in search engines.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.