Top Product ARR Concentration
Definition
Percentage of total ARR contributed by the single largest product line. Diversification-risk indicator at the product level (parallel to customer-concentration risk at the GTM level). Common pitfall: concentration risk is dismissed when the dominant product is performing well — but a one-product company is a one-feature-decision-away from existential risk. Boards should track this number alongside the portfolio narrative; sustained 70%+ concentration in a maturing company should pair with a documented diversification thesis or an explicit decision to remain a single-product company. Frames analogous to customer-concentration discussions in venture diligence (NfX / Bessemer founder essays cover the customer-side; the product-side analogue follows the same logic).
Why it matters
Quantifies single-point-of-failure risk in the product portfolio. The board reads this alongside `portfolio_strategy` to assess whether the company has a real second product or is effectively still single-SKU. Drives both strategic (build / buy / partner for diversification) and financial (valuation framing) conversations.
How it's calculated
top_product_arr_concentration_pct = (arr_from_largest_product / total_arr) × 100. Define "product" explicitly — a SKU, a billable module, or a packaging unit — and hold the definition stable. Surface both the percentage and the named top product. How to interpret it
Industry folk-wisdom, not citation-grade: concentration of 60–80% in the flagship product is common at early-growth multi-product SaaS; sustained 90%+ should be paired with an explicit single-product-strategy thesis or a documented diversification plan. The trend matters most — concentration falling from 95% to 70% over 4–6 quarters signals successful diversification; rising concentration during a multi-product strategy is a flag the secondary products are underperforming.
Source
imboard Editorial
Stage relevance
Typically owned by
Related KPIs
Narrative overview of the product portfolio — which products are growth engines, which are cash cows, which are innovation bets, and which are candidates for sunset. The CEO/CPO articulation of "what game each product line is playing." Frequently structured along the McKinsey Three Horizons framing or the classic BCG growth-share matrix (stars / cash cows / question marks / dogs — per Bruce Henderson's "The Product Portfolio", 1970). Common pitfall: the portfolio narrative does not name horizons, life-cycle stages, or sunset candidates — a portfolio described entirely as "growth engines" is not a portfolio strategy, it is a wishlist. Boards should push for explicit classification of every material product.
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Recurring revenue retained from the cohort of customers present at the start of the period, excluding expansion — so the metric captures only churn and contraction. Per the SaaS Metrics Standards Board (SMSB) GRR standard. GRR is bounded at 100% (cannot exceed it) and reads as the "no-defense-against-churn" floor on retention. The board reads GRR alongside NRR (`customers.net_revenue_retention`) — the gap between them is the expansion contribution. Common pitfall: treating GRR and NRR as substitutes — they answer fundamentally different questions, and a healthy NRR with sliding GRR signals churn masked by upsell.
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