What is Campaign ROI?
Campaign ROI measures the net profit generated by a marketing campaign relative to what it cost to run, expressed as a percentage. Unlike ROAS, which only compares revenue to spend, Campaign ROI accounts for the cost of goods or delivery, giving a true profitability read on the campaign.
TL;DR
Campaign ROI is the actual profit percentage a campaign generated after subtracting both ad spend and product costs, not just revenue against spend.
Formula
Campaign ROI = ((Revenue from Campaign - Campaign Cost - Cost of Goods Sold) / Campaign Cost) × 100
Why It Matters
Campaign ROI matters because ROAS alone can make a campaign look far more successful than it actually is, since ROAS only compares revenue to ad spend and never accounts for what it cost to produce or deliver whatever was sold. It matters because a business selling low-margin products can post a strong ROAS while barely breaking even, or even losing money, once product costs are subtracted, and Campaign ROI is what exposes that gap. Ignoring it means budget decisions get made based on a metric that flatters campaigns on cheap-to-produce products and unfairly penalizes campaigns on genuinely more valuable, higher-margin ones. It's especially important when comparing campaigns across different products or product lines, since two campaigns with identical ROAS can have wildly different Campaign ROI depending on their underlying margins. Because it's expressed as a clean profitability percentage, it also translates directly into conversations with finance about which campaigns are actually worth scaling.
Example
A campaign costs $20,000 to run and generates $80,000 in revenue on products with a 50% cost of goods sold, meaning $40,000 of that revenue is COGS. Campaign ROI is $80,000 minus $20,000 minus $40,000, divided by $20,000, times 100, which equals 100%. A campaign can post an impressive 4x ROAS and still have a mediocre Campaign ROI once product costs are subtracted, which is why Campaign ROI is the more reliable metric when comparing campaigns across products with different margins.
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