What's a good Lookalike Performance Index?
Karbon Agency's target for Lookalike Performance Index is 1.20 or higher. That is Karbon's own grading target, not a published industry average. Performance ratio of lookalike audiences vs. broad targeting (1.0 = same performance). Excellent is 2 or higher (Karbon target), and the minimum acceptable tier is 0.80 or higher (Karbon target).
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The three tiers Karbon grades against — and where each comes from
| Tier | Value | What it means | Basis |
|---|---|---|---|
| Minimum | 0.80 | The floor. Below this, something is broken. | Karbon target |
| Recommended | 1.20 | The tier a healthy campaign should hit. | Karbon target |
| Excellent | 2 | Top-tier performance worth defending. | Karbon target |
Higher is better for this metric.
Why Lookalike Performance Index matters
Validates whether your seed audiences are actually valuable. Below 1.0, broad targeting is cheaper. Above 1.2, your first-party data gives you a real competitive edge.
Karbon target
No independent public benchmark exists for Lookalike Performance Index as Karbon measures it. The tiers above are Karbon Agency's own grading targets for local-business campaigns, not an industry average, and we don't cite one we haven't found.
Where does your Lookalike Performance Index land?
Karbon Agency grades every client campaign against these exact tiers, live on a dashboard — no guessing, no quarterly PDFs.