Customer Acquisition Cost (CAC) Calculator
Calculate your real customer acquisition cost and understand marketing profitability.
Customer Acquisition Cost (CAC) is one of the most important metrics for ecommerce businesses. This tool helps founders and marketers calculate how much they spend to acquire each new customer and whether their marketing strategy is sustainable.
Marketing Costs
Enter your total spend for the period
Customers & LTV
For LTV:CAC ratio calculation
Example
Customer Acquisition Cost
₹340.00
per new customer acquired
Total Marketing Cost
₹1,70,000.00
All marketing spend
Customers Acquired
500
New customers this period
LTV : CAC Ratio
10.59: 1
Strong LTV:CAC ratio. Your marketing is sustainably profitable.
Customer LTV
₹3,600.00
AOV × lifetime orders
Profit per Customer
₹3,260.00
LTV minus CAC
Cost Breakdown
CAC Impact on Profit
Based on LTV of ₹3,600.00
| Scenario | CAC | Profit per Customer |
|---|---|---|
| Current CACCurrent | ₹340.00 | +₹3,260.00 |
| CAC −20% | ₹272.00 | +₹3,328.00 |
| CAC +20% | ₹408.00 | +₹3,192.00 |
Industry CAC Benchmarks
Typical CAC ranges across ecommerce categories in India
| Industry | Typical CAC |
|---|---|
| D2C Ecommerce | ₹300 – ₹1,500 |
| Marketplace Sellers | ₹200 – ₹800 |
| Fashion & Apparel | ₹500 – ₹2,000 |
| Beauty & Personal Care | ₹400 – ₹1,500 |
| SaaS Businesses | ₹2,000 – ₹10,000 |
What is Customer Acquisition Cost?
Customer Acquisition Cost (CAC) is the total amount a business spends to bring in one new paying customer. It is calculated by dividing all marketing and sales costs by the number of new customers acquired in the same period. CAC is a fundamental metric for understanding whether a business's growth is sustainable — if it costs more to acquire a customer than that customer will ever generate in revenue, the business model is broken regardless of revenue growth.
A common mistake is measuring only ad spend when calculating CAC. True CAC includes every cost attributable to acquiring customers: advertising, marketing tools and software, marketing team salaries, agency fees, content production costs, and any promotional discounts specifically used to drive first purchases. Using a partial figure understates the true cost of growth and leads to overconfident scaling decisions.
CAC Formula Explained
The CAC formula for ecommerce:
CAC = Total Marketing Cost ÷ New Customers Acquired
Total Marketing Cost = Ad Spend + Tools + Salaries + Agency Fees + Other
LTV = Average Order Value × Average Lifetime Orders
LTV:CAC Ratio = LTV ÷ CAC
Worked Example
Ad Spend ₹1,00,000 · Tools ₹10,000 · Salary ₹40,000 · Agency ₹20,000 · Customers 500
Total Cost = ₹1,70,000 · CAC = ₹340 per customer
Why CAC Matters for Ecommerce Growth
CAC is only meaningful when viewed alongside Customer Lifetime Value (LTV). The LTV:CAC ratio tells you whether your marketing is building value or destroying it. An LTV:CAC ratio below 1 means you are paying more to acquire a customer than they will ever return — a business in this position cannot grow its way to profitability. A ratio of 3:1 or higher indicates that each customer generates three times the cost of acquiring them, creating sustainable unit economics for growth.
Tracking CAC over time is as important as the absolute number. Rising CAC with flat LTV signals that marketing is becoming less efficient — often due to audience saturation, increasing competition, or poor creative performance. A downward trend in CAC with stable LTV is a strong indicator of maturing, efficient marketing operations.
How to Reduce CAC in Marketing
The most direct path to lower CAC is improving conversion rate — converting more of your existing traffic without increasing spend. A conversion rate improvement from 1% to 2% halves CAC from the same ad investment. Beyond conversion, building organic acquisition channels (SEO, referral programmes, social content) reduces blended CAC because organic visitors cost near zero to acquire. Retention is also a powerful CAC lever: improving repeat purchase rates means a greater share of revenue comes from existing customers rather than paid acquisition.
Ways to Reduce CAC
Practical actions to lower your customer acquisition cost.
Improve landing page conversion rate
A 2× improvement in conversion rate halves your CAC without touching ad spend. Test headlines, social proof, and checkout flow.
Increase repeat purchase rate
Repeat buyers cost near zero to acquire. Email sequences, loyalty rewards, and post-purchase follow-up all reduce effective CAC.
Refine ad targeting
Precise audience targeting reduces wasted impressions. Lookalike audiences built from your highest-LTV customers typically outperform broad targeting.
Add organic channels
SEO, content marketing, and referral programmes build channels where acquisition cost approaches zero over time, bringing down blended CAC.
Frequently Asked Questions
Related Ecommerce Tools
More calculators to plan your ecommerce profitability.