--- title: "Marketing and Margin Audit: Definition and Scope | MarginFix" description: "A marketing and margin audit is an independent review of marketing spend against unit economics. What it covers, and how it differs from a marketing audit." url: https://marginfix.ai/glossary/marketing-and-margin-audit/ lastmod: 2026-10-12 --- Your number See this page in your own figures: industry, spend and the estimated leak. [Run the estimator →](/estimator/) [Home](/) › [Glossary](/glossary/) › Marketing and margin audit Glossary · The audit # Marketing & margin audit An independent, evidenced review of marketing spend and unit economics that finds where budget leaks, quantifies the margin at stake and hands over a prioritized fix list. - Reviewed Oct 2026 - 3 min read - Part of the 14 term glossary - Median finding $58k a year across 74 audits 01 ## What a marketing and margin audit is A marketing and margin audit is an independent, evidenced review of where a business's marketing money goes and what it earns back in margin, not in revenue. It reconciles what the ad platforms and agencies report against the ledger, tests which spend is incremental, rebuilds the unit economics behind the offers, and puts an annual figure on every leak it finds. It differs from a conventional marketing audit in the yardstick. A marketing audit typically reviews channels, messaging and campaign performance against marketing metrics such as reach, click through rate and platform ROAS. A marketing and margin audit measures the same spend against contribution margin, so a campaign that hits its targets while selling orders below their true cost counts as a leak, not a success. 02 ## The audit output and an example The formula and an illustration; the corpus line is the audited figure behind it. Audit output = **where it leaks** + **the annual figure** + **the fix list, in priority order** Worked example *Illustration, not a client figure* A fixed fee, findings in 5 to 7 working days, one auditor with read only access, and a guarantee floor of findings per tier or the fee comes back. 74 audits across 9 industries; the median highlight finding is worth $58k a year. 03 ## Why the margin half of the audit matters The margin half is where most of the money is. The reports a marketing team works from are built to show activity and attributed revenue, and the leaks sit in what those reports leave out: conversions that would have happened anyway, revenue claimed by more than one platform, offers priced below their landed cost, retention that new spend papers over. None of them is visible without the finance data beside the marketing data. The output is a ranked list, not a scorecard. Each finding states where the money leaks, the evidence, the annual figure and the fix, in priority order by value. Across the 74 published audits a median 18.7% of marketing spend was leaking, and the median highlight finding was worth $58k a year. Independence is part of the definition. The audit is run by someone who does not buy the media, does not earn a share of the spend and is not selling the fix, so the finding can be that a channel should shrink. At MarginFix it runs on read only access, delivers in 5 to 7 working days for a fixed fee, and every report is reviewed by a senior auditor before it is handed over. 04 ## What the audits found, industry by industry The largest published finding in each of the 9 industries, each with the audited annual figure. - /cases/scaling-spend-was-hiding-a-134k-annual-margin-leak/DTC / Ecommerce ### Scaling spend was hiding a $134k annual margin leak - +$134k a year, findings in 6 days. - Read the case → - /cases/volume-rebates-were-paid-on-orders-that-never-hit-the-tier/Manufacturing ### Volume rebates were paid on orders that never hit the tier - −$118k a year, findings in 7 days. - Read the case → - /cases/incentive-spend-acquired-users-who-never-funded/Fintech ### Incentive spend acquired users who never funded - −$96k a year, findings in 7 days. - Read the case → - /cases/late-quarter-discounting-was-quietly-eroding-acv-margin/B2B SaaS ### Late quarter discounting was quietly eroding ACV margin - +$92k a year, findings in 7 days. - Read the case → - /cases/online-ads-were-paying-for-in-store-demand/Retail ### Online ads were paying for in store demand - −$88k a year, findings in 7 days. - Read the case → - /cases/congress-and-kol-sponsorship-showed-no-measurable-return/Pharma ### Congress and KOL sponsorship showed no measurable return - −$88k a year, findings in 7 days. - Read the case → - /cases/cac-looked-fine-until-we-split-it-by-cohort/Marketplace ### CAC looked fine, until we split it by cohort - +$82k a year, findings in 7 days. - Read the case → - /cases/seat-true-ups-were-under-billed-as-accounts-grew/Subscription ### Seat true ups were underbilled as accounts grew - +$63k a year, findings in 6 days. - Read the case → - /cases/intake-was-dropping-a-third-of-qualified-calls/Services ### Intake was dropping a third of qualified calls - +$62k a year, findings in 6 days. - Read the case → 05 ## Terms and guides related to the audit ### Related terms - [Margin leak](/glossary/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. - [Wasted ad spend](/glossary/wasted-ad-spend/) Media budget producing no incremental margin. - [Incrementality](/glossary/incrementality/) The share of conversions that happened because of the spend, against those that would have occurred anyway. - [Attribution inflation](/glossary/attribution-inflation/) When several platforms each claim the same sale, so attributed revenue adds up to more than 100% of actual revenue. - [Contribution margin](/glossary/contribution-margin/) Revenue minus every variable cost per order or unit: cost of goods, shipping, payment fees, returns. - [MER](/glossary/mer/) Total revenue divided by total marketing spend, a blended, platform independent efficiency measure. - [CAC](/glossary/cac/) The fully loaded cost to win one customer: acquisition spend divided by new customers. - [Payback period](/glossary/payback-period/) The time for a customer's contribution margin to repay their acquisition cost. - [LTV:CAC](/glossary/ltv-cac/) Lifetime value to customer acquisition cost, a headline health metric that misleads when LTV is built on revenue instead of contribution margin. - [Dunning](/glossary/dunning/) The process of retrying failed recurring payments. - [Take rate](/glossary/take-rate/) The percentage a marketplace keeps from each transaction. ### Guides that use this term - [How the audit works](/how-it-works/) The five pillars and the frameworks behind every finding. - [A sample audit report](/sample-report/) An illustrative report: what the findings and the fix list look like. - [Fixed fee tiers](/pricing/) The three tiers, what each one covers and the findings floor behind it. - [Audit or consultant](/compare/marketing-audit-vs-consultant/) Cost, speed and what you walk away with, side by side. - [Audit or agency self review](/compare/independent-audit-vs-agency-review/) What an independent read adds to the numbers your agency reports. - [Audit or in house review](/compare/marketing-audit-vs-in-house-review/) What your own team can reconcile, and what an outside read adds. 06 ## Questions about a marketing and margin audit ### What is a marketing and margin audit? An independent review of marketing spend against unit economics. It reconciles platform and agency reports to the ledger, tests which spend is incremental, rebuilds the margin behind each offer, and hands over a ranked list of leaks with an annual figure and a fix for each. ### How is it different from a marketing audit? A conventional marketing audit judges channels and campaigns on marketing metrics such as reach, clicks and platform ROAS. A marketing and margin audit judges the same spend on contribution margin, so it finds the campaigns that hit their targets while losing money on the orders they win. ### What does a marketing and margin audit deliver? The findings, each with its evidence and an annual figure, ranked by value, and the fix list in priority order. At MarginFix that arrives in 5 to 7 working days for a fixed fee, from read only access. [See a sample report →](/sample-report/) ## Know the term. Now measure it in your own numbers. Your own spend, measured against your own margin in 5 to 7 working days. $10k to $50k of findings, or your money back. [Book the audit](/book/) [Back to the glossary](/glossary/) Fixed fee. No retainer. NDA first. Go deeper ## The audit and the wider evidence - [All 14 terms The full glossary: every term with a formula and a worked example.](/glossary/) - [All 74 findings Ranked by annual value, $58k median, each one a real case.](/findings/) - [The benchmark Where 74 SMB marketing budgets leaked, by share of spend and by industry.](/benchmark/) - [Margin leaks The five leak patterns in depth: what each one is and how an audit finds it.](/margin-leaks/) - [Marketing audit checklist Thirty checks across paid media, attribution, pricing, retention and reporting.](/marketing-audit-checklist/) - [What an audit costs The 2026 market ranges with sources, against the fixed fee tiers.](/marketing-audit-cost/)