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Duplicate Cost Calculator

Estimate what duplicate records cost you every year on HubSpot, Salesforce, Klaviyo, Mailchimp, or Shopify.

—duplicate records
—platform cost / year
—wasted sends / year
—total / year

Duplicates also split attribution: first-touch, Original Source, and UTM history end up scattered across records, so the revenue a campaign drove can no longer be traced. That cost doesn't fit in a dollar box — it shows up as marketing decisions made on broken numbers.

How the estimate works

Every platform bills for duplicates somewhere. HubSpot, Klaviyo, and Mailchimp price by contact or profile tiers, so each duplicate is a record you pay for twice. Salesforce charges for data storage past your allowance. Shopify duplicates get your campaigns twice through connected email. The calculator multiplies your duplicate count by the platform's marginal list-price rate — assumptions are shown under the result, and you can change every input.

Where duplicate rates come from

Teams that have never deduplicated systematically typically find duplicate rates between 10% and 30% when they first measure. If you don't know yours, run an export through the free CSV dedupe tool for a floor — exact matching only finds the obvious ones — or run a free CleanSmart check to see the real number, including the duplicates only semantic matching catches.