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How-to guide

How to Calculate Customer Acquisition Cost: Formula, Steps & Examples

Learn how to calculate Customer Acquisition Cost — the formula explained step by step, with worked examples and a free calculator to check your answer.

By Priya Nair, MBA, Finance & Strategy · Updated Jun 2026 · 2 min read

Calculating your customer acquisition cost is straightforward once you know the Customer Acquisition Cost formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Customer Acquisition Cost Calculator.

What is Customer Acquisition Cost?

The Customer Acquisition Cost calculation tells you your customer acquisition cost from a few simple inputs. The figure you are solving for here is the customer acquisition cost, expressed in INR.

The Customer Acquisition Cost formula

The core formula is:

Customer acquisition cost = Total sales & marketing spend ÷ New customers acquired

Here is what each input means:

  • Total sales & marketing spend — a money amount. Example: ₹5,00,000.
  • New customers acquired — a number. Example: 250.

How to calculate it step by step

  • Write down the total sales & marketing spend (for example, ₹5,00,000).
  • Write down the new customers acquired (for example, 250).
  • Apply the formula above to get your customer acquisition cost.
  • Double-check the result with the Customer Acquisition Cost Calculator.

Worked examples

Example 1

Input / OutputValue
Total sales & marketing spend₹5,00,000
New customers acquired250
Customer acquisition cost₹2,000.00

With total sales & marketing spend of ₹5,00,000 and new customers acquired of 250, the customer acquisition cost works out to ₹2,000.00.

Example 2

With total sales & marketing spend of ₹10,00,000 and new customers acquired of 250, the customer acquisition cost works out to ₹4,000.00.

ResultValue
Customer acquisition cost₹4,000.00

Example 3

With total sales & marketing spend of ₹2,50,000 and new customers acquired of 250, the customer acquisition cost works out to ₹1,000.00.

ResultValue
Customer acquisition cost₹1,000.00

Tips for an accurate result

  • Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
  • Round only at the very end. Rounding inputs early can shift the final answer noticeably.
  • Re-run the numbers whenever an input changes, rather than estimating from an old result.

Prefer not to do the maths by hand? — the Customer Acquisition Cost Calculator does it instantly, for free, with the formula and a worked example built in.

Continue exploring marketing calculators with these tools: LTV to CAC Ratio Calculator, Conversion Value Calculator, Customer Churn Cost Calculator, Ad Frequency Calculator, Viral Coefficient Calculator.

Calculators in this guide

Frequently asked questions

The formula is: Customer acquisition cost = Total sales & marketing spend ÷ New customers acquired. With total sales & marketing spend of ₹5,00,000 and new customers acquired of 250, the customer acquisition cost works out to ₹2,000.00.

Gather each input, apply the formula step by step keeping your units consistent, and round only at the end. You can verify your answer instantly with the Customer Acquisition Cost Calculator.

It uses the standard formula with exact arithmetic, so the result is correct for the inputs you enter. Bear in mind that real-world outcomes can still differ when underlying assumptions change.

The customer acquisition cost is expressed in INR. Make sure your inputs use matching units so the result is correct.

Priya Nair · MBA, Finance & Strategy

Priya Nair is a business analyst and MBA who advises small businesses and startups on pricing, unit economics and growth metrics.