Marketing Efficiency Ratio (MER)
Marketing Efficiency Ratio (MER) explained — the blended revenue-to-spend metric gaining ground over platform ROAS in 2026.
Updated July 2026.
Total company revenue divided by total marketing spend across all channels — a blended, attribution-agnostic view of efficiency. Unlike ROAS, it doesn't rely on any platform's conversion tracking.
Formula
Total Revenue ÷ Total Marketing Spend
Benchmark range
Targets are business-specific, but many e-commerce brands aim for a blended MER of ~3-4x depending on margins. Judge MER against your own trend, not an industry constant.
Why it matters
As platform attribution fragments, channel-reported ROAS increasingly double-counts and overstates results. MER sidesteps the attribution debate by measuring whether total spend grows total revenue.
2026 update
MER gained real traction in 2026 as signal loss and attribution changes made platform ROAS less trustworthy — Triple Whale data showed Google MER rising even as reported ROAS fell. Meta's March 3, 2026 attribution change — click-through now requires an actual link click — lowered reported click ROAS without any real performance change, reinforcing the shift to blended measurement.
Where it applies
- Triple Whale
- Northbeam
- Cross-Platform Analytics