What is MER?
MER is your total revenue divided by your total marketing spend. All revenue, every source. All spend, every channel. Rs 50 lakh of sales on Rs 10 lakh of marketing gives you a MER of 5. It sidesteps the attribution argument entirely, which is precisely why founders started running their businesses on it.
Marketing Efficiency Ratio
How MER actually works
Take the revenue figure from Shopify or WooCommerce. Take every rupee of marketing spend for the same period, including Meta, Google, influencer payments, agency fees and affiliate commission, then divide the first by the second and stop. No pixels. No windows to argue about.
MER is deliberately blunt and the bluntness is the entire feature, because there is no gap between what a platform claims and what your bank account shows. It only works at the whole-business level though. You cannot use it to decide whether one ad set deserves more budget.
Where teams get MER wrong
Reading it daily. That is noise, especially for brands with lumpy revenue around paydays and festival weekends. Weekly at minimum.
The second issue is forgetting it includes organic revenue you never paid for, which means a brand with strong repeat business and a healthy WhatsApp list will post a flattering MER while its paid acquisition quietly loses money on every new customer it buys. New-customer MER separates the two and is usually the more honest view.
Third, comparing your MER to somebody else’s. Their organic share, category, repeat rate and margin structure are all different, so the comparison tells you nothing at all. Compare this month to last month.
What good looks like in India
Break-even MER works like break-even ROAS. One divided by gross margin. A brand at 55 percent breaks even near 1.8, so a MER of 3 is genuinely healthy and 5 is strong.
Indian brands scaling Meta and Google together tend to settle on watching MER weekly and platform ROAS daily, using the first to set total budget and the second to allocate inside it. That split stops the team from cutting a top-of-funnel campaign that reports badly while visibly holding the blended number up.
Related terms: MQL and SQL · Multi-Touch Attribution · NAP Consistency.
Where this shows up in the work: Performance Marketing · Full glossary.
MER — questions, answered.
It answers a different question. ROAS tells you which campaign to scale, MER tells you whether the whole operation makes money, and serious teams track both while never using one to settle an argument that belongs to the other.
Yes, if you want a number finance will accept. Include retainers, creative production and tooling. Some teams keep a media-only MER alongside it for planning, which is fine as long as everybody knows which one is on the screen.
Last updated 2026-08-08
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