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Churn Impact Simulator

Project customer count and MRR under churn and acquisition assumptions.

Last validated: 2026-02-14

Churn Impact Simulator projects customer count and recurring revenue from starting customers, ARPU, monthly churn, new customer acquisition, and projection length. Churn is the share of customers who leave in a period; logo churn counts customers, while revenue churn measures lost recurring revenue. ARPU is average revenue per user or account, and acquisition adds new customers to replace or exceed losses. Churn compounds over time, so small monthly differences can produce large changes in customer base and MRR after several months. This simulator is useful for retention planning, growth forecasting, and board-level scenarios, but real subscription models may also need expansion revenue, downgrades, seasonal acquisition, cohort behavior, and gross margin.

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Input Pattern

Enter values in the left panel, keep units explicit, run the calculation, then copy or share the result. Invalid fields are highlighted immediately.

Churn Model Inputs

Simulate customer and MRR outcomes from churn and new acquisition.

Projection Results

Customer change: 24

Final MRR: $62,880.00

Total churned customers: 216

Total new customers: 240

Annualized churn: 34.79%

Net revenue change: 4.80%

Month Churned Net Change Customers MRR
1 18 2 502 $60,240.00
2 18 2 504 $60,480.00
3 18 2 506 $60,720.00
4 18 2 508 $60,960.00
5 18 2 510 $61,200.00
6 18 2 512 $61,440.00
7 18 2 514 $61,680.00
8 18 2 516 $61,920.00
9 18 2 518 $62,160.00
10 18 2 520 $62,400.00
11 18 2 522 $62,640.00
12 18 2 524 $62,880.00

How to use this tool

  1. Enter Starting customers, ARPU ($), Monthly churn (%), New customers / month, Projection months (1-36) for the churn impact simulator, keeping units, dates, or text format consistent with the form labels.
  2. Confirm naming conventions, campaign labels, and destination details before generating the final output.
  3. Click "Run the tool" and review Churn Model Inputs, Projection Results for the primary output.
  4. Test the final URL, image, or metric convention before using it in a live campaign.

Worked Example

Auto-generated from the tool's current default or entered inputs.

Example Inputs

  • Starting customers: 500
  • Arpu: 120.0
  • Monthly churn percent: 3.5
  • Monthly new customers: 20
  • Months: 12
  • Final customers: 524
  • Final mrr: 62880.0
  • Net change customers: 24

Expected Outputs

  • Starting customers: 500
  • Arpu: 120
  • Monthly churn percent: 3.5
  • Monthly new customers: 20

Interpretation

Explore more versions

Tailored guides for specific audiences, regions, and scenarios.

Retention and analytics products

Recommend churn analytics tools, customer success software, and onboarding optimization products.

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