Every application accumulates some technical debt over time, and that is normal. The signs below are not about perfection. They are patterns that usually mean small issues are compounding into something that will be more expensive to fix the longer it is left alone.
The first sign is a growing fear of deploying changes. If small updates increasingly cause unrelated features to break, or the team has started avoiding certain parts of the codebase entirely, that usually points to missing tests, unclear dependencies between features, or both.
The second is response times that get worse as data grows, particularly on pages that query the database directly without caching or proper indexing. This is one of the more common and most fixable issues in older Laravel applications, since it often comes down to a handful of inefficient queries rather than a fundamental architecture problem.
The third is difficulty onboarding new developers. If a new team member needs weeks to make a small, confident change, that is rarely about their skill level. It usually means the codebase lacks clear structure, documentation, or consistent patterns, and that same friction is slowing down the existing team more than anyone has measured.
The fourth is dependencies that have not been updated in years, often out of fear that updating will break something unknown. This is a genuine risk, but an unpatched framework or library is also a security exposure that grows more serious with time, not less.
The fifth is simply not knowing the answer when someone asks how a specific feature actually works. If understanding a piece of business logic requires reading through several files and guessing at intent, documentation and structure have fallen behind the product. A focused technical review, rather than a full rebuild, is often enough to address these issues before they become bigger problems.