Email bounce cost calculator

Put in your own numbers. The page shows what bounced sends cost you, where your bounce rate sits against the limits one large sending service publishes, and what checking the list first would cost. Every formula is printed under the result. Nothing you type leaves your browser.

The numbers already in the boxes are examples, not facts about your list. Change every one of them. The share of bounces removed starts empty: only you can estimate it.

Addresses on your listExample input. Times you email the whole list each monthExample input. Your bounce rate now (%)Example input. Use the bounce rate from your last campaign report. What you pay per 1,000 emails sent ($)Example input. Your email platform bill divided by emails sent, times 1,000. Verification price per 1,000 checks ($)Example from the sheet: NeverBounce and Bouncer both list $8.00 per 1,000 at their smallest size (read October 20, 2026). Put in the price of the tool you are looking at. Your estimate: share of bounces removed (%)Your own estimate. No checker removes every bounce: catch-all domains accept any address, and mailboxes can fill up or close after the check. We do not use any vendor accuracy claim here. I run every list through two tools back to backDoubles the check cost.

Your bounce rate:

Source: Amazon SES sending review FAQ, read October 20, 2026. Other sending services set their own limits.

bounced emails a month. Wasted on sending: a month, a year.

Checking the whole list once:

Bounce rate after the check, at your estimate:

Sending cost saved: a month. The check pays for itself in .

How it is worked out

Bounced emails a month = addresses x sends a month x bounce rate:
Wasted on sending = bounced emails x price per 1,000 / 1,000:
Cost to check the list = addresses x verification price per 1,000 / 1,000:
Bounce rate after = bounce rate x (1 - share removed):
Saved a month = wasted on sending x share removed:

Sending cost is usually the small part. The larger risk is your sender reputation: a high bounce rate can push your good emails to spam or get sending paused. This page does not put a dollar figure on that, because it depends on your list and your sending service.

Thresholds used

From the Amazon SES sending review FAQ (read October 20, 2026): keep the bounce rate below 2% for best results; at 5% or more the account is placed under review; at 10% or more sending might be paused. These are Amazon SES rules. Your email platform may use different ones.

Where bounces come from, and what each check can catch

Typos in the domain, domains with no mail server and throwaway addresses can be caught before an address is saved. ContactLint checks those at the form or in a CRM import. Mailboxes that never existed on a real domain need a mailbox verifier, and catch-all domains stay uncertain with any tool. Compare 47 verification tools on price, free checks, credit expiry and catch-all handling.

Get the sheet as a CSV

All 47 tools plus the ContactLint row, with the vendor page and check date for each one. Opens in Excel, Numbers or Google Sheets.

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Next step

Get a free ContactLint key: 100 checks per month, no card required.