Marketing ROI Calculator
Measure the annualized return on a marketing campaign by attributing a portion of revenue to your spend and scaling the result to a 12-month basis. Use it to compare campaigns of different durations and channels on an equal footing.
About this calculator
Marketing ROI quantifies the financial return generated by a campaign relative to its cost, adjusted for the share of revenue you can confidently attribute to that campaign. The formula is: ROI = ((revenue × (attributionRate / 100) − marketingCost) / marketingCost) × 100 × (12 / campaignDuration). The attribution rate acknowledges that not all revenue from a period is caused by a single campaign — a 70% attribution rate means 70 cents of every revenue dollar is credited to this effort. Subtracting marketing cost from attributed revenue and dividing by marketing cost gives a raw return percentage. Multiplying by (12 / campaignDuration) annualizes the result, so a 3-month campaign delivering 50% ROI becomes 200% annualized — directly comparable to a year-long program.
How to use
A 3-month email campaign costs $5,000. It coincides with $40,000 in revenue, and you attribute 60% of that to the campaign. Attributed revenue = $40,000 × 0.60 = $24,000. Net gain = $24,000 − $5,000 = $19,000. Raw ROI = ($19,000 / $5,000) × 100 = 380%. Annualized ROI = 380% × (12 / 3) = 1,520%. This annualized figure allows direct comparison against a 12-month SEO investment, ensuring that shorter, high-intensity campaigns are not artificially penalized in budget allocation discussions.
Frequently asked questions
What attribution rate should I use when calculating marketing ROI?
Attribution rate depends on the model you use to assign credit. Last-click attribution gives 100% credit to the final touchpoint before purchase, which is simple but often overstates direct response channels. Data-driven attribution (available in Google Analytics 4) distributes credit across all touchpoints, typically yielding attribution rates of 40–80% for any single campaign depending on the customer journey length. For a conservative ROI estimate, use 50–60% as a starting point. If you have multi-touch attribution data from a CRM like Salesforce or HubSpot, use the actual fractional credit assigned to the campaign for the most accurate result.
Why does campaign duration matter when calculating annualized marketing ROI?
A campaign that runs for one month and delivers 50% ROI is technically delivering 600% annualized — far more capital-efficient than a year-long program at the same raw percentage. Annualizing by multiplying by (12 / campaignDuration) normalizes for this time difference, enabling apples-to-apples comparisons across your marketing mix. This is particularly important when comparing short-burst paid media flights against long-running content or SEO investments. Without annualization, short campaigns appear deceptively weak in portfolio reviews, leading to underinvestment in high-frequency, high-ROI tactics.
How is marketing ROI different from ROAS and which metric should I prioritize?
ROAS (Return on Ad Spend) measures gross revenue per dollar of media spend, ignoring all other costs, and is expressed as a multiplier. Marketing ROI — as calculated here — includes full campaign cost, applies an attribution rate, and expresses the result as a net profit percentage, making it a more complete business metric. For day-to-day bid optimization inside ad platforms, ROAS is faster and more actionable. For budget allocation across channels, board reporting, or comparing marketing to other capital investments, ROI is the right metric because it speaks the language of finance teams. Ideally, use both: ROAS to tune campaigns, ROI to justify budgets.