POAS vs. ROAS: what should you actually steer by?
Nicklas Segatz Mortensen · Growth Hacker · Fractional CMO · Meta Ads Nerd · 8 July 2026 · 4 min.
Short answer
ROAS measures revenue per ad euro; POAS measures gross profit per ad euro. ROAS is easy to report, but POAS is what tells you whether you're actually making money — so steer by POAS and treat ROAS as a quick gut-check.
Sådan virker det
ROAS ser hele omsætnings-stolpen. POAS regner kun det grønne med — det du faktisk tjener, når vareforbrug, fragt, gebyrer og annoncekroner er betalt.
01The difference that decides everything
ROAS only looks at revenue: spend €3,000 and get €12,000 in attributed revenue, and your ROAS is 4.0 — whether the product carries a 15% or a 70% margin. POAS puts profit into the equation: it strips out cost of goods, shipping, fees and returns before it measures the return. Two campaigns with identical ROAS can have wildly different POAS.
That's why ROAS can glow green while the campaign quietly loses money. Across a catalog with varying margins, a ROAS-driven account pushes budget toward what sells most — not what earns most. A systematic, expensive mistake.
Sådan virker det
ROAS ser hele omsætnings-stolpen. POAS regner kun det grønne med — det du faktisk tjener, når vareforbrug, fragt, gebyrer og annoncekroner er betalt.
02When to use which
Use ROAS as a quick reference at the campaign level when your products carry similar margins — it's easy to read and fine for comparing ads. But the moment budget has to be split across a catalog, POAS (or contribution margin as your conversion value) should take over.
In practice we steer by POAS and MER, and treat ROAS as an indicator, not the verdict. It moves the decision from "what sells" to "what earns" — and that difference is what lands on the bottom line.
Frequently asked questions
Is POAS always better than ROAS?+
As a basis for decisions, yes — POAS accounts for profit where ROAS ignores margin. ROAS is still useful as a quick reference at the campaign level, but budget decisions should be steered by POAS or contribution margin.
Can I use both POAS and ROAS?+
Yes. Use ROAS for a fast read and for comparing ads with similar margins, and POAS/MER for the real budget decisions across your catalog. They complement each other.
Related terms
Glossary
What is POAS?
POAS (Profit on Ad Spend) is your gross profit divided by ad spend. Where ROAS measures revenue per ad euro, POAS measures what you actually keep — after cost of goods, shipping and fees.
Read the entry →Glossary
What is ROAS?
ROAS (Return on Ad Spend) is the revenue generated by ads divided by ad spend. A ROAS of 4 means €4 in revenue for every ad euro — but says nothing about what you actually keep.
Read the entry →Glossary
What is MER?
MER (Marketing Efficiency Ratio) is your total revenue divided by your total marketing spend across every channel. It ignores the platforms' own attribution and shows how efficiently the whole marketing machine is working.
Read the entry →Glossary
What is contribution margin?
Contribution margin is revenue minus the variable costs (cost of goods, shipping, fees, returns). It's the amount each order contributes toward covering fixed costs and creating profit.
Read the entry →Profit Forge runs the whole setup toward POAS — from tracking to bid strategy.
See Profit Forge →
Nicklas Segatz Mortensen
Growth Hacker · Fractional CMO · Meta Ads Nerd at Oaksmond
Growth hacker and fractional CMO with 10+ years' experience and hundreds of millions in managed ad spend behind him. Background from larger Danish and international scale-ups, and from the agency world.
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