Customer Acquisition Cost Calculator
Find exactly how much you spend to win each new customer by dividing total marketing and sales costs by the number of customers acquired. Use it to benchmark campaign efficiency and set realistic growth budgets.
About this calculator
Customer Acquisition Cost (CAC) measures the average spend required to convert a prospect into a paying customer. The formula is: CAC = Total Marketing Cost / New Customers Acquired. Total Marketing Cost should include all sales and marketing expenses for the period — ad spend, salaries, tools, and agency fees. A lower CAC relative to the customer's lifetime value (LTV) signals a healthy, scalable business. Tracking CAC over time helps you identify which channels deliver customers most efficiently and where budget cuts or increases are warranted. Most businesses aim for an LTV-to-CAC ratio of at least 3:1 to ensure long-term profitability.
How to use
Suppose your company spent $15,000 on marketing and sales last month and acquired 300 new customers. Plug the numbers into the formula: CAC = $15,000 / 300 = $50. That means each new customer cost you $50 to acquire. Now compare that to your average customer lifetime value — if customers spend $200 over their lifetime, your LTV:CAC ratio is 4:1, which is strong. Adjust spend or targeting to bring CAC down further, or invest more aggressively if the ratio is already healthy.
Frequently asked questions
What is a good customer acquisition cost for a SaaS business?
A commonly cited benchmark for SaaS companies is a CAC that is no more than one-third of the customer's lifetime value, giving an LTV:CAC ratio of 3:1 or better. For many B2B SaaS products, CAC can range from a few hundred to several thousand dollars depending on the sales model. Self-serve products typically have lower CAC than those requiring a dedicated sales team. The most important thing is to track CAC by channel so you can double down on the most efficient acquisition sources.
What costs should be included when calculating customer acquisition cost?
CAC should reflect every expense directly tied to acquiring new customers in a given period. This includes paid advertising spend, content marketing and SEO costs, sales team salaries and commissions, marketing software subscriptions, and agency or freelancer fees. It is best practice to keep it to a defined time window — usually a month or quarter — and divide by the customers acquired in that same window. Excluding overhead costs like office rent is common, but some teams include a proportional share for a fully-loaded CAC figure.
How can I reduce my customer acquisition cost without cutting marketing spend?
The most effective way to lower CAC without slashing budgets is to improve conversion rates at each stage of the funnel, so the same spend yields more customers. Tactics include refining audience targeting, improving landing page copy and design, adding social proof, and nurturing leads with email sequences. Referral programs and organic content can supplement paid channels at a fraction of the cost per acquisition. Regularly auditing which channels have the lowest CAC and reallocating budget toward them also compounds efficiency over time.