SaaS Churn Death Calculator — See the Real Cost of Churn

Model your MRR trajectory over 36 months at different churn and growth rates. See exactly when your business dies — or thrives — based on retention.

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The Churn Death Calculator is a free, no-signup tool from Vibe Ideas. Model your MRR trajectory over 36 months at different churn and growth rates. See exactly when your business dies — or thrives — based on retention. Formula: Monthly MRR = Previous MRR × (1 - Churn%) + New MRR from Growth%.

What does the Churn Death Calculator do?

Model your MRR trajectory over 36 months at different churn and growth rates. See exactly when your business dies — or thrives — based on retention.

Most founders underestimate churn's compounding damage. 5% monthly churn equals 46% annual churn — you'll replace nearly half your customers every year just to stay flat.

How does the Churn Death Calculator work?

The Formula: Monthly MRR = Previous MRR × (1 - Churn%) + New MRR from Growth%

  1. Gather your inputs. Collect the values needed: Starting MRR ($), Monthly Churn Rate (%), Monthly New MRR Growth (%). Use real numbers from your analytics or finance dashboard when possible.
  2. Enter the numbers. Type each value into the matching field on the Churn Death Calculator. The calculator runs entirely in your browser — nothing is stored or sent to a server.
  3. Read the result and act on it. Most founders underestimate churn's compounding damage. 5% monthly churn equals 46% annual churn — you'll replace nearly half your customers every year just to stay flat.

Inputs you'll need

Why it matters for your startup

Most founders underestimate churn's compounding damage. 5% monthly churn equals 46% annual churn — you'll replace nearly half your customers every year just to stay flat.

Frequently Asked Questions

What is the Churn Death Calculator?

Model your MRR trajectory over 36 months at different churn and growth rates. See exactly when your business dies — or thrives — based on retention.

Why should I use the Churn Death Calculator?

Most founders underestimate churn's compounding damage. 5% monthly churn equals 46% annual churn — you'll replace nearly half your customers every year just to stay flat.

How is the Churn Death Calculator calculated?

The Churn Death Calculator is calculated using the following formula: Monthly MRR = Previous MRR × (1 - Churn%) + New MRR from Growth%.

Is the Churn Death Calculator free?

Yes — the Churn Death Calculator is 100% free and requires no signup, account, or credit card. Run it as many times as you need while iterating on your startup.

How accurate is the Churn Death Calculator?

The output reflects the inputs you provide. For directional planning and pitch decks, it is reliable. For board-level financial decisions, treat the result as a starting point and stress-test with alternative scenarios.

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