Customer Concentration
The degree to which a company's revenue depends on a small number of customers. High concentration means a few accounts represent a disproportionate share of total revenue, creating risk.
Why Customer Concentration Kills Valuations
A $10M ARR company where no customer is more than 2% of revenue will trade at a premium. A $10M ARR company where one customer is 25% of revenue will trade at a discount — or struggle to raise at all. Customer concentration is risk. If your biggest customer leaves, how much of your business disappears?
The Concentration Test
Calculate what percentage of revenue your top 1, top 5, and top 10 customers represent. Healthy benchmarks: top 1 customer under 5%, top 5 under 15%, top 10 under 25%. Anything above those thresholds means your revenue base is fragile.
The Paradox of Enterprise SaaS
Enterprise SaaS companies are more likely to have concentration risk because deal sizes are large. A $500K ACV deal in a $5M ARR company is 10% of revenue from day one. The solution is not to avoid enterprise — it is to grow the denominator aggressively so each large deal becomes a smaller percentage of the whole.
Protecting Against Concentration Risk
Beyond diversifying your customer base, protect yourself contractually. Multi-year agreements with termination penalties. Staggered renewal dates so multiple large accounts do not come up at the same time. Deep integration that creates switching costs. Make leaving painful enough that concentration risk becomes theoretical rather than practical.
Frequently Asked Questions
What is unhealthy customer concentration?
If any single customer represents more than 10% of revenue, that is a red flag. If your top 5 customers represent more than 30% of revenue, you have meaningful concentration risk. Investors and acquirers will discount your valuation because losing one customer could materially impact the business.
How do you reduce customer concentration?
Grow your smaller accounts faster than your largest ones. Invest in marketing to mid-market and SMB segments even if enterprise pays more. Build self-serve motions to diversify the base. Do not say no to big deals, but do not let them become 20% of your revenue without a plan to dilute that concentration.
