Refactoring in Scrum: How to Make Time for It
Refactoring is the practice of improving the internal structure of code without changing its external behaviour. A well-refactored codebase is easier to understand, cheaper to extend, and less likely to harbour hidden bugs. The problem is that refactoring is almost never urgent. Features ship, the product owner adds more stories, and the code quietly accumulates structural debt until the team is wading through complexity on every sprint.
Why Refactoring Gets Crowded Out
Three forces conspire against refactoring. It is invisible to stakeholders — a cleaner class hierarchy produces no user-facing change. It competes directly with features the product owner can see and measure. And because it is never critical, it drifts to the bottom of the backlog where it is never reached. The consequence is a codebase that gets harder to work in over time: velocity drops, bugs increase, and the team spends more effort navigating complexity than delivering value. Left unaddressed, structural debt has a compounding effect — each sprint becomes slightly more expensive than the last, and eventually the team reaches a point where adding any new feature requires understanding and working around a tangle of accumulated workarounds.
Four Strategies That Work
Apply the Boy Scout Rule. Leave the code cleaner than you found it. When a developer touches a class or module to implement a story, they make small improvements to that area as part of the same task — no separate ticket, no special approval. Over several sprints, incremental improvements compound into a noticeably cleaner codebase.
Add refactoring stories to the backlog. For larger structural improvements, write them as backlog items with a clear description of the problem, the proposed change, and the expected benefit. Frame the value in terms the product owner can evaluate: reduced future development time, lower bug risk, faster onboarding for new team members.
Include refactoring in the Definition of Done. If a story touches a module with known debt, the Definition of Done for that story can include a specific improvement. This keeps refactoring connected to delivery rather than isolated from it, and it applies selectively where the team has identified debt that is actively slowing them down.
Reserve a 10–20% capacity buffer. Some teams protect a portion of each sprint — typically 10 to 20% of capacity — for technical work with no direct product owner story. The product owner agrees to the buffer during sprint planning. The team uses it for whatever technical improvement matters most that sprint: refactoring, test coverage, dependency updates, or tooling.
When talking to a non-technical product owner, frame refactoring as investment in future delivery speed rather than cleanup for its own sake. The customer will eventually experience structural debt — in the form of slower delivery, more defects, and features that take three times as long as they should. A useful framing: every dollar of technical debt left in the code is a tax on every future feature. The question is not whether to pay it, but whether to pay it now on your own terms or later under pressure. Teams that have successfully built refactoring into their cadence consistently report that onboarding new developers becomes faster, that bug rates in refactored areas drop measurably, and that sprint planning becomes less fraught because the team is not constantly estimating around hidden complexity.
If your Scrum team is struggling with technical debt and sprint sustainability, XNM's program and project delivery practice can help you build the team disciplines and backlog habits that keep quality from being the first casualty of velocity pressure.