Marketing ROI (Return on Investment) is the ratio of the revenue generated by marketing activities to the cost of those activities. It is an essential metric for measuring the efficiency of marketing campaigns and for comparing the performance of different marketing channels, campaigns, and strategies.
Marketing ROI(%) = ((Revenue from marketing - Marketing cost) ÷ Marketing cost) × 100
ROAS = Revenue from marketing ÷ Marketing cost
Example: If you invest 1,000,000 KRW in an email marketing campaign and achieve 5,000,000 KRW in sales, then ROI = ((5,000,000 - 1,000,000) ÷ 1,000,000) × 100 = 400%. That means a net profit of four times the amount invested.
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If ROI is above 100%, this campaign is profitable.
| Campaign | Revenue | Cost | ROI | Net Profit | Delete |
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The higher the ROAS, the more efficient your advertising. A ROAS of 2 or above is generally considered a good result.
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A CLV:CAC ratio of 3:1 or higher is generally considered a healthy business model.
| Channel | Budget | Revenue | ROI | Conversion | Cost per Acquisition |
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To compare channels, enter the channel details and click the 'Compare Channels' button.
| Marketing Channel | Average ROI Range | Average Conversion Rate | Notes |
|---|---|---|---|
| Email marketing | 3,800% - 4,200% | 1% - 5% | Extremely cost-efficient, but limited in how far it can scale |
| SEO | 1,000% - 2,000% | 2% - 3% | High upfront investment, but delivers a high ROI over the long term |
| Content marketing | 300% - 600% | 1% - 3% | Effective for building brand awareness and long-term customer relationships |
| Social media | 200% - 400% | 0.5% - 2% | Effective for raising awareness, but direct conversion is relatively low |
| Paid Search (PPC) | 200% - 350% | 2% - 5% | Delivers immediate results; precise targeting lets you optimize efficiency |
| Influencer marketing | 500% - 700% | 1% - 3% | Reaches a specific audience with credibility, producing a high conversion rate |
When there are several marketing touchpoints, how you decide which channel contributed to a conversion matters. You need to consider the various attribution models available: last click, first click, linear, time decay, and others.
The effects of marketing activity may not appear immediately. Distinguish between short-term and long-term ROI, and define the measurement period clearly.
Indirect effects that are hard to measure as direct sales, such as improved brand awareness and greater customer loyalty, are also an important part of marketing ROI.
Considering a customer's full lifetime value rather than a single transaction gives a more accurate measure of long-term marketing ROI.
To calculate ROI accurately, include every related cost, such as labor, tool subscriptions, and content production, not just advertising spend.
An ROI figure on its own has limited meaning. Assess relative success by comparing it against industry averages, competitors, and your own past performance.
An online clothing retailer invested 500,000 KRW per month in an email campaign aimed at existing customers and achieved 21,000,000 KRW in sales.
A B2B software company invested 12,000,000 KRW over six months in industry blog posts, white papers, and case studies, and secured about 90,000,000 KRW in new contracts.
A food delivery startup invested 5,000,000 KRW per month in Instagram and Facebook ads and generated 14,000,000 KRW in new orders.