Customer Acquisition Cost (CAC) & LTV:CAC Ratio Calculator
Measure your unit economics. Calculate Customer Acquisition Cost (CAC), Customer Lifetime Value (LTV), payback period, and your LTV-to-CAC efficiency ratio.
Enter Parameters
Adjust inputs to calculate real-time estimates
What this customer acquisition cost (cac) & ltv calculator is showing you
This Customer Acquisition Cost (CAC) & LTV Calculator is designed to provide clear, reliable financial mathematics to assist in personal money management and scenario planning.
The tool focuses on transparent formulas, actionable outputs, and practical planning insights to support informed financial decision-making.
Mathematical Model
CAC = Total Marketing & Sales Spend ÷ New Customers Acquired; LTV = (ARPU × Gross Margin %) ÷ Churn Rate %; LTV:CAC = LTV ÷ CAC.
Inputs that matter most
Understanding how each variable impacts the final calculation
Total sales & marketing spend
The primary value establishes the baseline magnitude for the entire calculation model.
New customers acquired
The rate or percentage factor determines how the baseline value expands, discounts, or incurs expense over the modeled period.
Average Monthly Revenue Per User (ARPU)
The timeframe or secondary parameter provides essential context, defining the duration or conditions under which the math operates.
How to interpret your results
Use the calculation output as an objective decision-making checkpoint. Test multiple input scenarios to observe which variables exert the strongest influence on the final result.
Complement numerical outputs with comprehensive financial planning principles before executing binding commitments.
- ✓ Test both conservative and optimistic scenarios to understand the full sensitivity range of your financial plan.
- ✓ Verify critical calculations against official institutional documentation and qualified professional counsel.
Worked Example Scenario
The snapshot below illustrates a representative calculation using the standard initial parameters:
Customer Acquisition Cost (CAC)
₹ 200.00
Customer Lifetime Value (LTV)
₹ 1,800.00
LTV : CAC ratio
9 : 1
Payback period
2.2 months
An LTV:CAC ratio of 3:1 or higher indicates healthy unit economics for SaaS and subscription businesses, while payback under 12 months is considered stellar.
General Financial Calculation Considerations
This calculator provides educational estimates designed for preliminary planning and scenario analysis. Financial outcomes in practice are influenced by individual contractual terms, institutional fees, tax obligations, and market changes.
Verify all critical financial calculations with licensed advisers, institutional documentation, and qualified legal or tax professionals before executing binding agreements.
Key Factors to Review:
- • Calculations are mathematical models based on user-supplied variables.
- • Real-world results may vary due to fees, taxes, and contractual specifics.
Frequently Asked Questions
What is a good LTV:CAC ratio? ▼
An LTV:CAC ratio of 3:1 or higher is considered healthy for subscription and SaaS businesses. A ratio below 1:1 means you lose money on every customer, while above 5:1 may mean you are underinvesting in marketing.
What is a good CAC payback period? ▼
For SaaS businesses, recovering CAC within 12 months is standard. Early-stage startups often target 6 to 9-month payback periods to maintain cash runway.