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Glossary · The audit

Margin leak

A recurring, usually invisible loss of marketing margin, whether wasted paid spend, mispriced offers or retention drop off, that a healthy looking blended metric conceals.

  • Reviewed
  • 2 min read
  • Part of the 14 term glossary
  • Median finding $58k a year across 74 audits
01

What Margin leak means

A margin leak is a recurring loss of marketing margin that the usual reports do not show: paid spend that buys customers you already had, an offer priced below its true landed cost, a discount habit that trains buyers to wait, a retention drop off that new trial spend papers over. Each one repeats every month, and each one is invisible in a blended dashboard that reads green.

The word leak is deliberate. A leak is not a one time mistake; it is a structural flow of money out of the margin, sized in dollars a year, that continues until someone measures it and closes it. The audit's job is to find the leaks, put an annual figure on each, and rank them.

02

The Margin leak formula and a worked example

The formula and an illustration; the corpus line is the audited figure behind it.

Margin leak = recurring annual loss an audited fix would stop

Worked example Illustration, not a client figure

A $3,000,000 revenue business leaking 18% of a $600,000 marketing budget is losing $108,000 a year while every blended report reads green.

Across the 74 audits a median 18.7% of marketing spend was leaking, inside an 11% to 28% band.

03

Why Margin leak matters in an audit

Across the 74 published audits, a median 18.7% of marketing spend was leaking, inside an 11% to 28% band, which works out to 1% to 3% of revenue. The five patterns the audits find most often are non incremental paid spend (68% of audits), attribution inflation (54%), mispriced offers (47%), retention leaks (41%) and discount habits (33%).

A leak is sized, not described. For each finding the audit states the annual figure, the evidence behind it and the fix, so a reader can rank the list by value. The median highlight finding across the corpus is worth $58k a year, and the findings library ranks all 74.

Most leaks are nobody's fault. They sit between teams, between an agency's reporting and the finance ledger, or inside a pricing decision made two years ago. That is why they survive: everyone is looking at a report that was never designed to show them.

04

Margin leak in the audited cases

Published cases where Margin leak was at the center of the finding, each with the audited annual figure.

06

Questions about Margin leak

What is a margin leak in marketing?

A margin leak is a recurring loss of marketing margin that blended reporting hides: wasted paid spend, a mispriced offer, a discount habit or a retention drop off. It is sized in dollars a year and it continues until it is measured and closed.

How big is a typical margin leak?

Across the 74 published audits a median 18.7% of marketing spend was leaking, inside an 11% to 28% band, or 1% to 3% of revenue. The median highlight finding is worth $58k a year.

How do you find a margin leak?

By reconciling what the platforms report to what the ledger shows, then testing the gap: holdouts for paid spend, landed cost per order for pricing, cohort retention against trial spend. The five patterns page walks through each test. Read the five leak patterns →

Know the term. Now measure it in your own numbers.

Margin leak, measured against your own accounts in 5 to 7 working days. $10k to $50k of findings, or your money back.

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