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Churn Rate & LTV Calculator

Calculate LTV, CAC payback, and churn in seconds

Churn is the silent killer of SaaS growth. A 1% improvement in monthly churn can increase LTV by 25–50%. Enter your ARPU, churn rate, CAC, and margin to get the metrics VCs actually look at when evaluating your business.

Monthly revenue per paying customer

$

% of customers who cancel each month

%

Total marketing + sales spend ÷ new customers acquired

$

Revenue minus direct hosting/infrastructure costs

%

LTV

$784

20mo avg lifetime

LTV:CAC Ratio

6.5x

CAC Payback

3mo

Annual Churn

46%

✅ LTV:CAC above 3x — healthy unit economics. Consider increasing ad spend.

LTV (Customer Lifetime Value)

ARPU × (1 ÷ monthly churn rate) × gross margin. The total gross profit you expect from one customer before they churn.

LTV:CAC Ratio

How much you earn per customer vs how much you spent to acquire them. Below 3x: unsustainable. 3–5x: healthy. Above 5x: either scale faster or you're leaving money on the table.

CAC Payback Period

Months until you recover your acquisition cost. Under 12 months is excellent for SaaS. Over 18 months is a cash flow problem.

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