What happens if we pay down debt at this rate?

Questions CTOs ask

What are the different tech debt repayment strategies?

The three main strategies are: dedicated allocation (reserve a fixed percentage of each sprint for debt work — typically 15-25%), debt sprints (dedicate entire sprints to debt reduction periodically — effective for large refactoring projects), and boy scout rule (improve code incrementally as you touch it — low overhead but insufficient for structural debt). Most effective organizations combine all three: ongoing boy scout improvements, dedicated allocation for medium-sized debt, and periodic focused sprints for major architectural remediation.

How does technical debt affect engineering velocity?

Technical debt compounds like financial debt — each additional piece of debt makes future development slower and riskier. Heavily indebted codebases slow teams down as engineers spend increasing time navigating complexity, working around fragile systems, and fixing regression bugs. (An earlier version of this answer attributed a 40-60% velocity loss to unnamed research; there is no such research, so the figure was removed.) The simulator models this compounding effect, showing how deferring debt repayment today leads to exponentially higher costs tomorrow, and how sustained investment in debt reduction can recover lost velocity within 6-12 months.