20-35% duplicate contact rate in a mature US CRM
Multiple import waves without deduplication checks produce a predictable duplicate accumulation. A US HubSpot or Salesforce account that has imported contacts from trade show badge scans, webinar registration lists, paid ad form fills, and manual sales team entries over three to five years without running deduplication between imports typically reaches a duplicate rate between 20-35% of total contacts. One contact appears in the CRM as three separate records: one from the 2021 trade show import, one from the 2023 webinar registration, and one added manually by a sales rep who did not search before creating. The downstream effects are measurable: the CRM sends the same email to the same person three times; the sales team works three separate leads that are the same person; reporting counts one contact as three and inflates all metrics. Deduplication with a tool like Dedupely for HubSpot or Cloudingo for Salesforce identifies and merges duplicate records while preserving the most complete data from each.