How an Agency Can Bill Clients for Email Verification: Line Item, Bundle or Absorb

There are three workable ways to bill clients for email verification: a pass-through line item, a bundled per-campaign fee, or absorbing it in the retainer. Whichever you choose, apply the same rule to every client and keep a record per client of how many rows you checked. The right choice follows from how the rest of your pricing is built, not from the verifier's price.

This post is about the commercial side. For the mechanics of running lists, see the agency client list workflow.

Option 1: pass-through line item

Show verification as its own line on the invoice. Useful when you bill hourly or by deliverable and clients want to see where money goes.

• Works best with per-client usage numbers, so the line is defensible.
• Needs a fair method: rows checked in the month times your cost per check, or a flat monthly amount.
• Risk: clients compare it to a one-off verifier price and ask for a cheaper tool. Have the answer ready: re-checks, reports and your time.

Option 2: bundle into a campaign fee

Include a list-cleaning step in the price of each campaign launch. The client sees "list preparation and verification" as part of the deliverable.

• Easy to explain. Nobody argues about a few cents a row.
• Works when campaigns are similar in size. Large one-off lists need a size tier, or your margin disappears.
• Name the step in your scope so it is not mistaken for optional.

Option 3: absorb it

Treat the plan as overhead, like your sending infrastructure. Common for retainers priced on meetings booked or pipeline.

• Simplest. No invoicing detail.
• You carry the volume risk. Track it per client anyway; see the capacity worksheet.
• Compare to the cost of the alternative, which is a bounce spike. Infrastructure costs are in cold email infrastructure cost per month.

How to choose

If your pricing is...	Lean towards
Hourly or itemised	Pass-through line item
Fixed fee per campaign	Bundle into the fee
Retainer tied to results	Absorb
Mixed, with a few huge accounts	Absorb, plus a size tier for large lists

What to show the client

Counts and outcomes, not addresses. A one-page summary: rows checked, valid, risky, invalid, and the main reasons for invalid rows, such as "Mailbox not found" or "Typo domain - did you mean gmail.com?". That demonstrates the work without handing over more data than needed.

On Agency, branded client reports carry your name and logo and can be saved as PDF, exported as a CSV summary or shared by a link that expires in 7 or 30 days. See agency client verification reports for what goes in one.

The numbers to keep per client

1. Rows checked in the month.
2. Valid, risky and invalid counts.
3. Re-checks, so you can tell new volume from repeat volume.
4. The bounce rate of the campaign that used the list.

Agency's per-client usage by month records the first two for each client workspace.

Plans

Pro is $39 a month with the first 100,000 checks a month at full speed, then slower, never cut off. Business is $99 with 5 seats. Agency is $249 with 15 seats, client workspaces and 750,000 checks a month. See pricing, and try 100 free checks, no card, on the verify page.