LTV is the counterpart to CAC. Formula varies: simple LTV = Average order value × Purchases per customer × Years retained. Profit-based LTV multiplies this by gross margin to remove COGS.
For subscription businesses: LTV = (Monthly ARPU × Gross margin) / Monthly churn rate. So a SaaS with ₹2,000 ARPU, 80% margin, 5% churn has LTV of ₹32,000.
Indian SMBs often overestimate LTV by ignoring refunds, returns, and churn. Cohort-based LTV (calculating LTV per acquisition month) is the most accurate way.