Customer Churn Rate (Logo Churn) Calculator

What is Customer Churn Rate (Logo / Account churn)? Customer churn rate (logo churn) is the percentage of starting customer accounts that cancel or fail to renew during a define...

Customer Churn Rate Calculator (Logo / Account churn)

Logo (customer count) churn — not revenue/MRR churn. Calculate customer churn rate for a period with a clean, minimal input set, plus scenarios and short “What It Means?” explanations.

Choose the time window that matches your customer counts. Your churn % is for that period; the “Low/High” label uses a monthly-equivalent churn rate so periods compare fairly.

Number of active customer accounts at the beginning of the period (your starting logo base).

How many customer accounts canceled or became inactive during the period. Enter a count (not a percentage).

New customer accounts added during the period. This is optional and only used to compute ending customers.

Scenarios
Load common logo-churn profiles (all inputs are counts for the selected period).
Healthy SaaS (low churn)SMB churn (moderate)Churn pressure (high)Annual view (normalized)

Results

  • Customer churn rate— %
  • Monthly‑equivalent churn (for classification)— %
  • Customer retention rate— %
  • Customers retained—
  • Ending customers (computed)—

Enter your inputs above to calculate the results.

What is Customer Churn Rate (Logo / Account churn)?

Customer churn rate (logo churn) is the percentage of starting customer accounts that cancel or fail to renew during a defined period (month/quarter/year), ignoring how much they paid.

It matters because logo losses shrink the renewable revenue base, reduce LTV, raise required new bookings just to “stand still,” and weaken unit economics and value creation (ARR/MRR durability, Rule of 40, and capital efficiency).

Formula

Customer Churn Rate = Customers Lost / Starting Customers
Customer Retention Rate = 1-Customer Churn Rate
Monthlytext-Equivalent Churn = 1-(1-Period Churn)1 / Months in Period

Example

Starting customers (beginning of month): 1,000

Customers lost (churned) during month: 30

Customer Churn Rate = 30 / 1000 = 0.03 = 3%
Customer Retention Rate = 1-0.03 = 0.97 = 97%

Customers retained: 970

Frequently Asked Questions

What’s the correct denominator for logo (customer) churn — starting customers or ending customers?

Use starting customers for the selected period. Logo churn is meant to measure how much of your beginning customer base you lost, not how many you ended with.

Should I include new customers gained during the period when calculating customer churn?

For true logo churn, don’t include new customers—new logos are a separate growth motion. Only include new customers if you’re intentionally trying to normalize churn against a changing customer base, and then keep that method consistent over time.

How do I compare monthly churn to quarterly or annual churn without misleading myself?

Convert using compounding, not simple division. If your churn is measured over N months, monthly-equivalent churn is:

    • Monthly-equivalent churn (from churn over an N-month period):
Monthly churn = 1 − (1 − Period churn)(1 / N)

_(read as: “one minus (one minus period churn) to the power of one over N”)_

    • Annual churn (from monthly churn):
Annual churn = 1 − (1 − Monthly churn)12
When is logo churn the wrong metric, and I should use Net MRR Churn / NRR instead?

Use Net MRR Churn (or NRR) when expansions, downgrades, and account size differences matter—logo churn can look “fine” while revenue retention is slipping (or vice versa).

Sources & Methodology