Contracted Logo Churn Rate

What it measures

The Logo Churn Rate is a rate, not a count. It normalizes churned logos against the opening base so it compares cleanly across months and across companies of different sizes — 3% on a 500-customer base (15 logos) is the same retention health as 3% on a 1,500-customer base (45 logos). It counts only full account cancellations; downgrades, contractions, pauses, and failed payments are excluded. Every logo counts equally regardless of contract value, so a $500/month customer and a $50K/month customer move the rate the same amount.

Why it matters

You track the Logo Churn Rate because retention, not acquisition, decides whether a SaaS business scales. New logos are expensive to win; if you add 100 and lose 10 every month, you net 90 and your payback period stretches indefinitely unless bookings keep accelerating. Operators watch it monthly because it shows whether the base is growing or shrinking, a rising rate is an early warning of product defects, competitive pressure, or support failures, and it feeds lifetime-value and CAC-payback math. CFOs use it to forecast net logo additions and model unit economics: at 1% monthly logo churn the median customer lifetime is ~83 months; at 5% it collapses to ~20 — an enormous swing for valuation.

How to read it

Read the Logo Churn Rate as the monthly replacement rate of your customer base — 3% means you must replace 3 of every 100 opening customers just to stay flat. To judge health, compare it to your target (e.g. "we run under 2% monthly"), to the prior month and prior year, and to your new-logo rate: if acquisition is flat or falling while churn rises, the base is shrinking. Always decompose the move — did one large account leave, or are you seeing broad erosion across cohorts? Pair the rate with the absolute Churned Contracted Logos count and with churned revenue (churned-arr or churned-mrr) to see whether you are losing your smallest accounts (low-value, manageable) or your largest (high-value, dangerous).

What good looks like

Watch-outs

• Confusing logo churn with revenue churn. A 3% logo churn rate can represent 15% of ARR if the accounts that left were your largest — track the Logo Churn Rate and churned-arr separately so a few big losses don't hide behind a low logo rate.
• Counting downgrades or seat reductions as churn. A customer dropping from $10K to $5K is a contraction (downsell), not a cancellation. Count only full cancellations where the entire contract ends and recurring revenue reaches zero.
• Including paused or suspended contracts. A temporary pause with intent to reactivate is not churn — your billing system must distinguish suspension from termination, or you will overstate the rate.
• Ignoring cohort age and seasonality. A fresh cohort may churn 15% in month one, then 1% monthly after. Reporting only the aggregate rate masks this; segment by cohort age, acquisition source, and product tier.

Worked example