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Most applicant tracking systems contain years of candidate data. Most of that data is wrong.
Not wrong in an obvious way. The names are correct. The records exist. But the job titles are from two years ago. The email addresses bounce. The phone numbers are old. And the most important candidates have completely different career trajectories now.
This is the stale data problem. It's one of the main reasons recruiting teams source externally when they should be working their existing pipeline.
How ATS data degrades
Candidate data has a short useful life. Research across recruiting platforms consistently shows that around 30 percent of contact data goes out of date every year. People change jobs, change emails, and change phone numbers at a high rate.
In a system with 10,000 candidate records built up over five years, a significant portion of the contact details are unreachable and the job information is outdated.
The problem compounds because most ATS systems are passive. They store what you put in and wait. They don't check whether the data is still accurate or update automatically when someone changes jobs. The data sits and ages.
Why it matters for hiring
You're sourcing from the wrong starting point. When a new role opens, most recruiting teams go to external sources first and their ATS second. The ATS is second because people have learned not to trust it. That means ignoring a database you've paid to build over years.
Pipeline reports become unreliable. When data is stale, time-to-fill calculations and sourcing attribution become inaccurate. You can't make good decisions about where to invest if your data doesn't reflect reality.
You create duplicate records. If a candidate exists in your ATS under an old email and you source them from an external database, you create a second record. Over time, you get a fragmented view of your own candidate pool.
You miss warm outreach opportunities. A candidate who applied two years ago and was rejected for timing, not quality, is a warm lead when a similar role opens. Stale data means you can't find or reach them.
Common causes beyond just age
Inconsistent data entry. When different recruiters enter candidate data in different formats, quality varies. Some records are detailed. Others have a name and nothing else.
No deduplication process. Over time, the same person appears multiple times under slightly different names or email addresses.
Rejected candidates are forgotten. Most teams focus ATS effort on active candidates. Rejected applicants get a status update and are never touched again. But they're still a candidate pool.
Integration gaps. If your sourcing tools and your ATS don't sync properly, activity that happens outside the ATS doesn't get recorded. The ATS misses conversations, outreach history, and candidate responses.
How to keep your ATS useful
Enrich existing records automatically. Tools that connect to your ATS and update records with current contact details, job titles, and profile data make your existing database usable.
Search your ATS before sourcing externally. When a role opens, search the ATS first. You'll often find people who are perfect for the role and already in your system.
Add notes at rejection. 'Salary expectations above band' and 'excellent candidate, timing issue' are very different from 'not a fit.' Good rejection notes make re-engagement much faster.
Run periodic data hygiene. Quarterly passes through high-value records to verify and update information are worth the time.
Use a tool that syncs bidirectionally. A true two-way sync means your ATS stays updated as sourcing activity happens.
The compounding value of clean data
The recruiting teams with the best sourcing results over time are usually the ones with the best data hygiene. Their ATS is actually useful. When a role opens, their first search returns real candidates they can reach. They spend less time sourcing externally and more time talking to people who are already warm to them.
This doesn't happen by accident. It's the result of consistent enrichment, good note-taking, and tools that keep data fresh automatically.
TalentRiver integrates with your ATS and enriches existing candidate records with current contact information and job data. Your old database becomes a sourcing asset rather than a source of noise. See how it works.
