Customer Acquisition Cost (CAC) Calculatorv1.0.0

Calculate customer acquisition cost in three quick steps: enter your acquisition spend, enter the number of new customers, and review the calculated CAC. Add a Customer Lifetime Value to extend the analysis with the LTV to CAC ratio.

• Enter your Marketing Spend for the chosen period. Include paid advertising, content production, sponsorships, agency fees, and any other marketing investment that contributed to acquiring new customers.
• Enter your Sales Spend for the same period. Include base salaries, commissions, sales tooling, travel costs, and lead generation expenses.
• Enter Other Spend if additional costs apply. Examples include shared software subscriptions, allocated overhead, customer onboarding tools, or partner referral fees.
• Enter the New Customers Acquired during the same period. Use only net new customers and exclude renewals, expansions, or returning buyers.
• Enter your Customer Lifetime Value if you want to view the LTV to CAC ratio. Calculate LTV separately as average revenue per customer multiplied by expected customer lifespan.
• Open Settings to change the currency symbol or enable the step-by-step formula display for full calculation transparency.
• Click Calculate to see results. Inputs also update results automatically after a short delay, and clicking Reset clears all fields.

The core formula is CAC equals total spend divided by new customers acquired, where total spend is the sum of marketing, sales, and other spend. The LTV to CAC ratio divides customer lifetime value by CAC. A ratio of 3 to 1 or higher generally indicates healthy unit economics, while ratios below 1 to 1 mean the business is spending more to acquire each customer than that customer generates over their lifetime. All numeric inputs accept decimals, fractions, mixed numbers, currency symbols, and commas, which are stripped automatically before calculation.

Apply the CAC calculator across marketing, sales, finance, and operations teams to evaluate acquisition efficiency, plan budgets, and report performance. Customer acquisition cost analysis benefits any organization that invests in attracting new customers, from early stage startups to large enterprises.

• SaaS and Subscription Businesses: Calculate monthly or quarterly CAC across paid search, content marketing, partnerships, and outbound sales. Compare the LTV to CAC ratio against the 3 to 1 industry benchmark to confirm unit economics support continued growth.
• E-commerce Operators: Measure acquisition cost per campaign, channel, or seasonal promotion. Enter total ad spend and the resulting new customer count to evaluate whether holiday sales, influencer partnerships, or paid social campaigns delivered profitable results.
• Startup Founders: Track CAC trends from pre-launch through scaling stages to demonstrate efficiency improvements to investors. Show that combined marketing and sales spend produces predictable customer counts at sustainable cost levels.
• Marketing Teams: Compare CAC across acquisition channels by running separate calculations for each source. Identify the channels that deliver the lowest cost per acquired customer and reallocate budget toward the best performers.
• Financial Planning Teams: Use the LTV to CAC ratio to set acquisition budget ceilings. If customer lifetime value is 900 and the target ratio is 3 to 1, the maximum acceptable CAC is 300 per customer.
• Agencies and Consultants: Generate clear CAC figures for client reports by entering campaign costs and customer counts. Toggle the step-by-step formula display to include the full derivation in presentations and dashboards.
• Subscription and Membership Services: Confirm that CAC stays below first year subscriber revenue. Enter monthly subscription revenue multiplied by average retention months as the LTV to view the ratio instantly.