Unit Economics Calculator

Unit economics is the analysis of revenue and costs associated with a single unit of a business model, typically one customer. It answers the fundamental question: do you make or lose money on each customer you acquire? No amount of growth can compensate for negative unit economics. A business that loses Rs 100 on every customer does not become profitable by acquiring a million customers; it simply loses Rs 10 crore faster. This calculator helps you understand whether your customer economics support a scalable, sustainable business.

Customer Lifetime Value (LTV)

LTV represents the total gross profit a business can expect from a single customer over the entire duration of their relationship. The simplified formula used here is LTV = (ARPU * Gross Margin) / Monthly Churn Rate. This formula assumes constant ARPU and churn rate, which is a reasonable first-order approximation. For a SaaS company with Rs 1,500 monthly ARPU, 70% gross margin, and 5% monthly churn, LTV = (1500 * 0.70) / 0.05 = Rs 21,000. This means each customer generates approximately Rs 21,000 in gross profit over their lifetime.

The LTV/CAC Ratio: Your North Star

The LTV/CAC ratio is arguably the most important metric for any subscription or recurring revenue business. A ratio of 3.0x or higher is considered excellent by venture capital standards: for every rupee spent acquiring a customer, the business generates three rupees in gross profit. Between 1.0x and 3.0x, the business is viable but may struggle to generate sufficient returns for investors after accounting for overhead, R&D, and other costs not captured in unit economics. Below 1.0x, the business is fundamentally unsustainable because you spend more acquiring customers than you ever earn back.

CAC Payback Period

The CAC payback period measures how many months it takes for a customer's monthly gross profit contribution to repay the acquisition cost. A payback period of 12 months means the customer becomes profitable after the first year. For Indian SaaS companies, 12-18 months is typical. Consumer internet businesses should aim for under 6 months. Longer payback periods tie up capital and increase risk because customers might churn before you recover the acquisition cost.

Churn: The Silent Destroyer of Unit Economics

Monthly churn rate has an outsized impact on LTV. Reducing churn from 5% to 3% monthly increases average customer lifespan from 20 months to 33 months, boosting LTV by 67%. This is why many SaaS companies invest heavily in customer success and retention programs. In the Indian market, where switching costs for many digital services are low, churn management through superior product experience, customer support, and community building is often more valuable than aggressive customer acquisition.

Indian SaaS and D2C Benchmarks

India's SaaS ecosystem has matured significantly, with companies like Freshworks, Zoho, and Chargebee demonstrating world-class unit economics. Top-quartile Indian SaaS companies achieve LTV/CAC ratios of 4-6x, gross margins above 75%, and monthly churn rates below 3%. For D2C (Direct-to-Consumer) brands, which are a growing segment in India, unit economics are typically thinner: LTV/CAC of 2-3x is considered good, with gross margins of 40-60% and higher churn due to the discretionary nature of purchases. Understanding your unit economics relative to your industry segment is essential for realistic planning.