Topic · Performance marketing
MER vs ROAS for blended attribution
ROAS lies. MER tells the truth.
DefinitionPerformance marketing
What is mer vs roas for blended attribution?
MER (Marketing Efficiency Ratio) is total revenue divided by total marketing spend across all channels for a period. ROAS (Return On Ad Spend) is per-channel and platform-reported. MER captures blended performance including organic uplift; ROAS overstates last-click channels and understates upper-funnel.
Services that operate this topic
How Xpand Media runs it
Service
Performance marketing
Paid campaigns on Google, Meta and YouTube, plus LinkedIn for B2B, run by Xpand Media and reported against your own revenue data.
Service
Marketing strategy and planning
A marketing plan, channel priorities and oversight of your vendors, from an agency that also runs paid, outbound and web.
Industries that care about this
Sector relevance
- VerticalB2B SaaSB2B SaaS in 2026 buys through ChatGPT and Perplexity before it ever sees Google. If your brand isn't cited in AI answers, demos don't book.
- VerticalFintechFintech in 2026 lives or dies on regulator-aware content and AI-citation share for regulated queries. DIFC, ADGM, MAS, SAMA — each has rules that shape what content you can publish.
- VerticalDTC e-commerceDTC in 2026 wins on creative volume, not creative quality. AI pipelines that produce 40-80 vertical-video variants per week beat brands that produce 8.
FAQ
Common questions about mer vs roas for blended attribution
Should we ever look at ROAS?
Yes, as a directional channel-level signal. Just never as the sole optimization target. ROAS over-credits brand and remarketing; under-credits awareness.
What is a healthy MER?
Sector-dependent. DTC fashion 3-5x. SaaS 2-4x. Marketplace 2-3x. The right benchmark is the one that lets the unit economics work at scale.
How does MER interact with payback period?
MER is the rate; payback period is the time. A high MER with a 12-month payback is a slower-growth profile than a lower MER with a 4-month payback.
Can MER be calculated weekly?
Yes, but it is noisier than monthly. Weekly MER is useful as a trend signal; monthly is more reliable for decision-making.
Does MER work for B2B with long sales cycles?
Yes, but the revenue side must include downstream-pipeline-to-closed-won conversion at the right lag. Otherwise the lookback window flatters early-stage spend.
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