Metrics
Customer Concentration
Quick definition
The share of revenue from your top customers. High concentration is a critical fundraising and acquisition risk.
Customer concentration measures revenue dependency on top customers. Investors red-flag: any single customer >20% of revenue, or top 3 customers >40% of revenue. Audit standard: disclose any customer >10% of revenue in financial statements. High concentration is the single biggest fundraising killer at Series B+. Mitigate by deliberately diversifying upmarket while protecting your largest accounts.
Related metrics terms
ARR (Annual Recurring Revenue)
Annualized value of your subscription revenue at a point in time.
MRR (Monthly Recurring Revenue)
Monthly equivalent of ARR, useful for month-over-month tracking.
Net Revenue Retention (NRR)
Revenue from your existing customer base 12 months later, including expansion and churn.
Gross Revenue Retention (GRR)
NRR without upsell — what you keep before expansion.
Frequently asked questions
- What is Customer Concentration?
- Customer concentration measures revenue dependency on top customers. Investors red-flag: any single customer >20% of revenue, or top 3 customers >40% of revenue. Audit standard: disclose any customer >10% of revenue in financial statements. High concentration is the single biggest fundraising killer at Series B+. Mitigate by deliberately diversifying upmarket while protecting your largest accounts.
- Why is Customer Concentration important for startups?
- Customer Concentration is a metrics concept that matters for startup founders because it directly affects fundraising readiness, financial decision-making, or operational discipline at the stage where mistakes are expensive to undo. Founders who understand it have a meaningfully easier time in diligence, board meetings, and investor conversations.
- What category does Customer Concentration belong to?
- Customer Concentration is a Metrics term in the StartupCFO finance glossary — alongside other metrics concepts that founders, CFOs, and accountants use in daily startup operations and reporting.
- Where can I learn more about Customer Concentration?
- Beyond this definition, see the related metrics terms below, or explore StartupCFO's insights and tools that put Customer Concentration in context. For specific situations, talk to a fractional CFO who can walk through your numbers.
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