Marketing Debt
Marketing debt is the compounding cost of budget decisions made on wrong attribution. Each quarter a brand allocates spend on correlated numbers instead of causal evidence, the misallocation carries into the next plan and grows. Like technical debt, but on the marketing P&L.
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By Joris van Huët, Founder & CEOUpdated 2 min read
What is Marketing Debt?
The term maps the mechanics of technical debt onto the marketing budget. The shortcut is allocating on platform-reported or last-click numbers; the interest is that each quarterly plan starts from the previous plan's misread numbers, so the error compounds. It accrues through four documented mechanisms: zombie spend the platforms keep re-crediting, incremental channels killed by last-click, gross-ROAS blindness to returns and margin, and plans built on the last wrong plan.
Why Marketing Debt matters for ecommerce
Marketing debt is invisible in platform dashboards because the platforms issuing the numbers are the ones over-claiming.
Frequently asked questions
What is marketing debt?
Marketing debt is the compounding cost of budget decisions made on wrong attribution. Each quarter a brand allocates spend on correlated numbers instead of causal evidence, the misallocation carries into the next plan and grows. It works like technical debt, but on the marketing P&L.How does marketing debt accumulate?
Through repetition. One quarter of allocating on inflated platform ROAS is a bounded mistake; using that quarter's results to set the next quarter's budget bakes the error into the baseline. Over several cycles the plan itself becomes the liability, because every line item inherits assumptions that were never causally true.How do you reduce marketing debt?
Audit the allocation against causal evidence instead of platform-claimed conversions. Estimate each channel's incremental revenue, compare it with what the dashboards claim, and move budget toward the channels with proven lift. The sooner the plan is rebased on caused revenue, the less the misallocation compounds.