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ROI of Email Validation: Interactive Calculator + Template

Want to justify the cost of email validation? Use our free calculator to estimate ROI based on bounce rate, list size, and conversion value.

Lero Team
8 min read
12/19/2024

🤔Why ROI of Email Validation Matters

If you're sending 10,000 emails and 25% are bouncing, you're not just losing deliverability—you're wasting money:

  • Paying for email tools (SendGrid, Mailchimp, Apollo…)
  • Burning your sender reputation
  • Losing potential revenue from leads that never see your message

And the worst part?

"Most teams don't realize how much money they're actually losing."

📉Let's Do the Math

Here's a real-world example using our calculator:

MetricValue
Emails sent per month25,000
Bounce rate (before)20%
Cost per email sent$0.0015
Conversion rate (after open)3%
Value per conversion$150

👉 Without validation:

  • • 5,000 emails bounce
  • • You still pay to send them
  • • You never had a chance to convert them
  • • Result: ≈ $1,600 in lost potential revenue/month

👉 With validation (bounce drops to 1%):

  • • 4,750 more emails land in inboxes
  • • That's 142 more opens, ~4 more conversions
  • Net value recovered: $600–700/month

🧮Try It Yourself (Free ROI Calculator)

Download Excel/Notion Template

🧩 Variables you can edit:

  • • List size
  • • Bounce rate (before/after)
  • • Email cost
  • • Conversion rate
  • • Value per lead

Or use the interactive version online—no email required.

When Email Validation Pays Off (FAST)

Email validation makes the most sense when:

ScenarioValidation pays off?
Cold outreach at scale (Apollo, Instantly)✅✅✅
Paid lead magnets (Meta/LinkedIn Ads)✅✅✅
Launching newsletters (Substack, Beehiiv)✅✅
Running a CRM cleanup / re-engagement
Manually curated lists or referrals❌ (low volume)

Even cleaning a 2,000-lead list can pay for itself in 1 campaign if you're avoiding blacklists and boosting open rates.

💡Bonus: What You Save (Besides Cash)

Protect your domain

You don't burn your cold domain

Healthy metrics

Your open/reply rates look healthy

Avoid spam filters

You stop triggering spam filters

Clean CRM

You stop clogging HubSpot or CRM with junk

Better reputation

Your reputation score improves (hello inbox)

🚀 Ready to Calculate Your ROI?

"We started using Lero and saw ROI literally overnight."

500 free validations
Sub-50 ms speed
Pay-as-you-go from $0.0003/email

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Ready to validate your emails?

Try Lero for free and validate up to 100 emails without any cost.