By now, most Jira admins know that the Jira Data Center to Cloud migration is no longer a question of if, it’s a question of when and how. With Atlassian’s official Data Center end-of-life date set for March 28, 2029, teams across the world are starting to plan their move.
But here’s the thing: having a deadline doesn’t automatically mean having a plan. And in our experience working with Jira teams every day, the technical migration itself is rarely the hardest part. What derails migrations, delays, data issues, user frustration, unexpected costs, almost always comes down to avoidable mistakes made in the planning stages.
Here are the five most common migration mistakes, and what you can do to avoid them.
Mistake #1: Skipping the Environment Audit
The single most common mistake teams make is jumping into migration without truly understanding what they’re migrating. Most long-running Jira Data Center instances have evolved organically over the years, and by the time migration comes around, they are far more complex than anyone remembers.
What tends to hide in plain sight: unused custom fields that still appear in every screen, obsolete workflows that nobody owns, archived projects that haven’t been touched in years, duplicate permission schemes, and integrations that were set up by someone who left the company long ago.
Migrating all of this to Cloud doesn’t clean it up – it carries the mess into a new environment, where it becomes harder to manage and more expensive to fix.
What to do instead: Before anything else, run a thorough audit of your Jira instance. Document every active project, workflow, custom field, user group, and Marketplace app. Archive or delete what you no longer need. The Jira Cloud Migration Assistant can help surface configuration issues, but the strategic cleanup decisions are yours to make.
Mistake #2: Underestimating Marketplace App Compatibility
For many teams, Marketplace apps are the backbone of how Jira actually works in practice – from SLA tracking and time reporting to issue history and form management. And this is exactly where Jira Cloud migration planning most often goes wrong.
Not every Data Center app has a Cloud equivalent. Some cloud versions exist but work differently. Some have feature gaps that will impact your team’s daily operations. And since December 2025, Atlassian stopped accepting new Data Center app submissions entirely – meaning the DC app ecosystem is now frozen and will only shrink over time.
Discovering app incompatibilities after you’ve migrated is a painful and expensive problem. Teams sometimes find themselves without critical functionality on day one, forcing workarounds or rushed replacements.
Mistake #3: Treating Migration as a One-Time Event Instead of a Process
Many teams approach Atlassian Cloud migration like a weekend project: move the data, flip the switch, done. In practice, successful migrations are structured processes that unfold in stages — and teams that skip the intermediate steps are the ones that end up with the most problems.
The pattern that works looks something like this: assess your environment → clean up → run a test migration → validate results → involve key users → run another test → then go live. Skipping the test runs is one of the most common and costly shortcuts. It means the first time you discover a problem is in your production environment, in front of your entire team.
Atlassian explicitly recommends running multiple test migrations before your production cutover, especially for larger instances, and getting in touch with their migration support team at least one to two months in advance if you have over 1,000 users.
What to do instead: Build a phased migration plan with clear milestones. Start with a pilot migration of one or two low-risk projects to validate your setup. Review the results carefully before moving on. Use the testing phase to identify workflow gaps, missing permissions, or broken integrations, and fix them before the real migration begins.
Mistake #4: Ignoring Change Management and User Communication
A technically flawless migration can still be a failure if your users aren’t prepared for it. Jira Cloud looks and behaves differently from Data Center in several areas — navigation, project settings, board configurations, and certain admin functions have all changed. Teams that receive no warning and no training often experience a sharp drop in productivity in the first weeks after migration, followed by a flood of support requests.
This is especially true for project managers and team leads who rely on specific views, filters, and dashboards that may not transfer exactly as expected.
What to do instead: Treat migration as a change management project, not just a technical one. Identify the people who will be most affected – power users, project managers, team leads, and involve them early. Create simple documentation that explains what’s changing and what’s staying the same. Consider running short training sessions or “office hours” in the weeks following go-live. The smoother the human transition, the faster your team returns to full productivity.
Mistake #5: Waiting Too Long to Start Planning
This one might seem counterintuitive given that the deadline is still a few years away. But in our experience, large Jira environments routinely take 12 to 24 months of planning and execution to migrate successfully – especially when app compatibility, data cleanup, user training, and phased rollouts are all factored in.
Organizations that wait until 2027 or 2028 to begin will face a very different landscape than those who start now. Migration specialists will be in high demand and short supply. Marketplace app vendors will be focused on their own customers’ deadlines. Atlassian’s migration incentive programs – like the current FastShift program for larger customers – may not be as widely available. And the internal pressure of a hard deadline rarely brings out the best decisions.
What to do instead: Start your assessment now, even if you don’t plan to go live for another year. Understanding your current environment, your app dependencies, and your likely migration complexity costs you nothing, and it gives you the one thing that makes every migration better: time.
Jira Data Center to Cloud – Without Migration Mistakes
Migrating from Jira Data Center to Cloud is a significant undertaking, but it is very manageable when approached thoughtfully. The teams that struggle are almost never the ones that started too early, they’re the ones that underestimated the complexity, skipped the planning stages, or waited until the deadline was breathing down their necks.
The good news is that every mistake on this list is avoidable. Start with an honest audit of your environment, take your Marketplace apps seriously, test thoroughly, communicate clearly with your users, and give yourself enough runway to do it right.
SaaSJet’s Migration Hub is here to help you navigate the process – from understanding which apps will carry over to making sure your reporting, SLA tracking, and issue history are intact from day one. And for the full picture on Atlassian’s official migration tools and resources, the Journey to Cloud guide is the best place to start.
