Skip to content
  1. Home
  2. Calculators
  3. Wasted ad spend estimator
Calculator

Wasted ad spend estimator

How much of your monthly budget you cannot yet connect to real revenue — the spend flying blind.

This is not "bad" spend — it is unmeasured spend. When a lead arrives with no reliable source, the revenue it becomes cannot be traced back to the campaign that drove it, so that budget is being allocated blind. The bigger that share, the more of your spend is a guess.

Your numbers

Spend flying blind, per month €3,500
Per year €42,000

Runs entirely in your browser — nothing is sent anywhere.

The formula

Monthly spend × share of leads with no reliable source

How to read it

  • Broken tracking, missing UTMs and mismatched numbers between ad platforms and CRM are the usual causes — most teams underestimate the share until they measure it.
  • The fix is rarely to spend less: it is to close the attribution gap so the same budget becomes measurable, and the genuinely wasted part becomes visible.
  • This estimates exposure, not a refund — it sizes the decision, it does not promise a saving.

FAQ

How do I know my unattributed share?

It is the percentage of leads (or deals) that arrive with no reliable source — no UTM, no click id, no captured referrer. KO surfaces this as a data-health figure; without a tool, a rough count from your CRM is enough to start.

Does unattributed always mean wasted?

No — some of it converts fine, you just cannot see which spend earned it. That is the point: you cannot cut or scale what you cannot attribute.

Want these numbers computed from your real ad and CRM data, updated daily?