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BoolBul
BOOLBUL.The Retention Interceptor
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Cohort LTV & Cumulative Revenue Calculator

Model cumulative gross margin generated by a customer cohort over 12 to 24 months. Account for monthly retention decay. Free interactive tool.

Interactive CalculatorReal-time browser computation
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Calculated Results

12-Month Cumulative Profit

$31,617

Month 12 Remaining Accounts

37 accounts

About this tool

Static LTV formulas (ARPU / Churn) assume a simplified, theoretical infinite lifespan that often fails to reflect real-world cohort behavior. In reality, customer cohorts decay dynamically: month 1 experiences the highest attrition, but subscribers who survive past month 6 retain at vastly higher rates for years. A cohort LTV model tracks the actual cumulative gross profit produced by a specific group of customers over successive months (e.g. Month 1 through Month 24). This empirical modeling allows finance teams to observe exactly when cumulative cohort gross profit eclipses the upfront Customer Acquisition Cost (CAC) spent to acquire that group, proving true cash-on-cash return. Use this calculator to model cumulative cohort revenue generation.

How It Works

  1. 1Input your initial cohort subscriber volume (e.g. 100 customers).
  2. 2Input your monthly plan price and gross margin percentage.
  3. 3Input your monthly customer retention percentage.
  4. 4Inspect the month-by-month cumulative gross profit and retained customer count over 12 months.

Formula & Math

Transparent Logic
Cumulative Margin(m) = ฮฃ [Remaining Customers(t) ร— ARPU ร— (Gross Margin% / 100)]

Worked Practical Example

A cohort of 100 users pays $50/mo with an 80% gross margin ($40/mo profit) and 90% monthly retention.

Calculation / Steps

Month 1: 100 ร— $40 = $4,000. Month 2: 90 ร— $40 = $3,600 (cumulative $7,600). Over 12 months: accumulates ~$28,700.

Expected Result

Generates $28,700 in cumulative gross margin from an initial cohort of 100 subscribers.

Frequently Asked Questions

Why is cohort LTV superior to simple static LTV formulas?+

Cohort LTV accounts for real-world decay curves, providing precise visibility into cash timing rather than relying on abstract infinite-horizon math.

What does it mean if cumulative cohort gross profit flattens early?+

It signals that customer churn is too high, preventing the cohort from delivering compounding value beyond initial months.

How does BoolBul impact cohort LTV curves?+

BoolBul intercepts cancelling users and keeps them active, significantly boosting the remaining customer count and cumulative margin in every successive month.

BoolBul Retention Engine

Automate retention on your cancel button

BoolBul lifts the long-tail cumulative earnings of every customer cohort by arresting voluntary customer drop-off.

From the MIACIA Studio Journal