Customer Concentration Calculator
See what share of revenue your biggest customer represents and how exposed you are.
Top customer share
What it measures
Customer concentration is the share of revenue that depends on your largest account, or largest few. It is the quiet risk metric in every diligence process.
Why it matters
One account above 20 percent of revenue can veto your roadmap and sink a quarter by leaving. Buyers and investors price that risk in.
A worked example
A 30,000 account inside 200,000 total is 15 percent concentration: notable, but below the level that alarms acquirers.
How to read and improve it
The fix is boring and works: widen the base. Concentration falls as a side effect of consistent new logo growth.
Frequently asked questions
What level is risky?
Any single customer above 20 percent, or the top five above 50, will get flagged in diligence.
Should I turn down big customers?
No, but price the risk in: longer contracts, deposits, and an active push to grow the rest of the base.
More in SaaS metrics: SaaS CAC Calculator · Customer Lifetime Value Calculator · Churn Rate Calculator
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