Revenue Churn Rate Calculator

Measure gross revenue churn from contraction and churned MRR as a percentage of starting MRR. Clean, focused UX with clear tooltips, scenarios, and a concise What It Means panel.

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Results

  • Revenue churn rate %
  • Lost MRR (contraction + churn) $
  • Ending MRR from existing customers $
  • Starting MRR $
  • Churn profile

What is Gross Revenue Churn Rate (MRR)?

Gross Revenue Churn Rate (MRR) (a.k.a. Gross MRR Churn Rate) measures the percentage of your starting MRR from existing customers that you lose during a period due to cancellations (Churned MRR) and downgrades (Contraction MRR). It intentionally ignores upgrades/upsells (Expansion MRR) so you can see your pure revenue leakage from the installed base.

This matters because it directly hits revenue durability and makes growth more expensive: the higher your gross churn, the more New MRR you need just to “stand still,” and the harder it is to improve Net Revenue Retention (NRR), Gross Revenue Retention (GRR), and Net MRR Churn Rate. It also ripples into unit economics—shrinking LTV, worsening LTV:CAC (via CAC), and often signaling a pricing/packaging or customer-success issue you’ll also see in Customer Churn Rate and declining ARPA.

Formula

Example

Starting MRR (existing customers): $120,000

Contraction MRR: $4,000

Churned MRR: $6,000

Lost MRR (contraction + churn) = $4,000 + $6,000 = $10,000

Gross Revenue Churn Rate = ($10,000 ÷ $120,000) × 100% = 8.33%

Ending MRR from existing customers = $120,000 − $10,000 = $110,000

How to Use the Gross Revenue Churn Rate (MRR) Calculator

Enter your starting MRR from existing customers, then add the MRR you lost from downgrades and cancellations. The calculator returns your gross revenue churn rate and the ending MRR from your existing base.

  1. Enter Starting MRR (existing customers)

    • Input the MRR at the start of the period for your existing customer base (exclude new customer MRR).

  2. Enter Contraction MRR

    • Add the MRR lost from existing customers who downgraded (plan/seat/usage reductions).

  3. Enter Churned MRR

    • Add the MRR lost from customers who canceled or failed to renew.

  4. Read “Lost MRR” and “Ending MRR from existing customers”

    • “Lost MRR” is the total loss from contractions + churn.

      • - “Ending MRR” shows what remains from the existing base after those losses.

  5. Use the churn profile to sanity-check severity

    • If the churn profile flags the result as high, treat it as a retention problem to investigate (cohorts, segments, downgrade reasons, cancellation drivers).

Frequently Asked Questions

Methodology & Sources

Bibliography

  1. (2022). On the Nature of Modeling and Valuation in a Search Fund Acquisition — Yale School of Management
    Accessed 2025-12-14
  2. (2024). Revenue churn: How to calculate it and why it matters — Stripe
    Accessed 2025-12-14
  3. (2024). How to Calculate and Improve SaaS Revenue Churn — Lighter Capital
    Accessed 2025-12-14

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