Customer Acquisition Cost Calculator — CAC, LTV & Ratio
Free CAC calculator for US businesses and SaaS teams. Measure customer acquisition cost, lifetime value (LTV), the LTV:CAC ratio, payback period, and profit per customer from your marketing, sales, and advertising spend.
1. Marketing & Sales Costs
Total marketing program spend for the period.
Sales salaries, commissions, and tools.
Paid ads, PPC, social, and display.
Agency fees, software, and tools.
Total new customers acquired in the same period.
2. Customer Value Metrics
Used when churn rate is 0.
Overrides lifetime when greater than 0 (1 ÷ churn).
3. Reference & Notes
CUSTOMER ACQUISITION COST ANALYSIS
Marketing Efficiency & Customer Value
Reference: CAC-2026-001
Date:
Total Acquisition Cost$100,000.00
New Customers500
CAC$200.00
LTV$7,000.00
LTV:CAC Ratio35.0x
CAC Payback0.6 Months
Profit / Customer$6,800.00
Efficiency Score⭐ 5.0/5
Cost Breakdown
Marketing$50,000.00
Sales$30,000.00
Advertising$20,000.00
Other$0.00
Effective Lifetime20.0 mo
Total Cost$100,000.00
Efficiency Metrics
CAC$200.00
LTV:CAC Ratio35.0x
Profit per Customer$6,800.00
Formulas
CAC = Total Marketing & Sales Costs ÷ New Customers
Your CAC is $200.00 and LTV is $7,000.00, giving an LTV:CAC ratio of 35.0x — excellent marketing efficiency.
Notes
Customer acquisition cost analysis for marketing optimization
This calculation is for informational and educational purposes. Actual customer economics depend on retention, pricing, channel mix, and market conditions. Consult a qualified marketing or financial professional for decisions specific to your business.
Prepared By
Date
GUIDE
How to Use This Customer Acquisition Cost Calculator
This free customer acquisition cost calculator — often called a
CAC calculator or CAC & LTV calculator —
measures the efficiency of your marketing and sales spend. Enter your costs for the
period, the number of new customers acquired, and your average revenue, churn, and
margin. The calculator shows CAC, LTV,
LTV:CAC ratio, payback period, and
profit per customer. Pair it with the
Lifetime Value Calculator
for a deeper LTV model, or run the
Business ROI Calculator
to translate unit economics into ROI.
1
Enter Marketing & Sales Costs
Include every acquisition cost — marketing, sales, advertising, agency fees, and tools — for the same period.
2
Enter New Customers
Total new customers acquired in the same period. Consistency between cost period and customer period is essential.
3
Add Customer Value Metrics
Enter average revenue per customer, monthly churn rate (or lifetime in months), and gross margin.
4
Review CAC, LTV & Ratio
See CAC, LTV, LTV:CAC ratio, payback period, and profit per customer with an efficiency score.
5
Save, Print or Export
Save a draft in your browser, print the analysis, or download a PDF for your records.
CAC EDUCATION
What Does a Customer Acquisition Cost Calculator Calculate?
A customer acquisition cost calculator converts your marketing and
sales spend into a per-customer dollar figure, then pairs it with
customer lifetime value to judge whether your growth is
economically sustainable. The result is the LTV:CAC ratio — the single
most important metric for scaling a customer-driven business.
Key CAC & LTV calculations
Total Acquisition Cost: Marketing + sales + advertising + other acquisition costs.
CAC: Total cost ÷ new customers acquired.
Effective Lifetime: Derived from churn (1 ÷ churn rate) or entered lifetime when churn is 0.
Lower payback is safer for cash flow. SaaS benchmarks often target payback within 12 months; enterprise SaaS may allow 18–24 months.
7. Profit per customer
Profit per Customer = LTV − CAC
8. Efficiency score (0–5)
A weighted composite of the LTV:CAC ratio and payback period. It is a directional
indicator — never a substitute for cohort-level analysis.
Important assumptions
Revenue per customer and gross margin are treated as constant across the lifetime.
Churn is assumed constant; real churn often varies by cohort and age.
Expansion revenue (upsells, cross-sells) is not modeled separately.
Attribution of costs across channels is not modeled — enter blended totals.
Taxes, financing costs, and CAC-loaded commissions are not separated.
This is a screening estimate, not a financial statement analysis.
E-E-A-T & SOURCES
CAC Information, Sources & Editorial Review
MoneyTool separates calculation results from business education and personalized
advice. The calculator uses documented unit-economics formulas, while external growth
strategy guidance should be verified with authoritative sources.
Author and editorial responsibility
Methodology reviewed by the
MoneyTool Finance Expert Team,
a group of accountants, CPAs, and finance analysts who maintain
MoneyTool's calculator library and financial education content.
Last reviewed:
| Unit-economics methodology (CAC, LTV, payback)
Next review: When calculation logic, supported inputs, or relevant guidance changes.
Authoritative U.S. business, finance, and analytics resources
U.S. Small Business Administration (SBA) — Plan Your Business:SBA Plan Your Business
covers business planning, market research, and financial forecasting.
U.S. Small Business Administration (SBA) — Market Research and Competitive Analysis:SBA Market Research
provides a framework for understanding customers, pricing, and demand.
U.S. Securities and Exchange Commission (SEC) — Investor.gov:SEC Investor.gov
provides investor education that helps contextualize growth and unit economics.
Financial Industry Regulatory Authority (FINRA):FINRA Investor Education
offers practical guidance on evaluating business and investment performance.
Internal Revenue Service (IRS) — Small Business Tax Center:IRS Small Business Tax Center
covers expense classification and deductions that affect marketing and sales costs.
Federal Trade Commission (FTC) — Business Guidance:FTC Business Guidance
covers advertising, disclosure, and marketing-compliance topics.
U.S. Bureau of Labor Statistics (BLS) — Business Employment Dynamics:BLS Business Employment Dynamics
provides industry-level data useful for benchmarking marketing and sales cost ratios.
Consumer Financial Protection Bureau (CFPB):CFPB Consumer Tools
provides consumer-facing financial resources that pair with business education.
External resources are provided for education and verification. MoneyTool is not affiliated
with or endorsed by the SBA, SEC, FINRA, IRS, FTC, BLS, or CFPB.
BEST PRACTICES
Tips for Reducing Customer Acquisition Cost
Lowering CAC is rarely about cutting spend — it's about spending where retention and
margin actually support it.
📊
Track All Costs
Include salaries, tools, agency fees, and content production — not just ad spend.
📈
Target 3:1 or Higher
Aim for an LTV:CAC ratio of at least 3:1 for sustainable, scalable growth.
💰
Shorten Payback
Faster CAC payback improves cash flow and reduces growth risk. Aim for under 12 months.
🎯
Segment by Channel
Compute CAC by channel and cohort to double down on the highest-return acquisition paths.
🔄
Review Monthly
Track CAC, LTV, and ratio every month to catch efficiency drift before it compounds.
✅
Consult a Professional
For complex growth programs, engage a marketing analytics or finance advisor.
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Frequently Asked Questions About Customer Acquisition Cost
What is Customer Acquisition Cost (CAC)?
Customer Acquisition Cost (CAC) is the total cost of acquiring a new customer, calculated by dividing all marketing, sales, and advertising expenses by the number of new customers acquired during the same period.
What is a good LTV:CAC ratio?
A common benchmark is an LTV:CAC ratio of 3:1 or higher. Ratios below 3:1 may indicate that acquisition costs are too high relative to customer value, while ratios above 5:1 may suggest underinvestment in growth.
How is Customer Lifetime Value (LTV) calculated?
LTV can be estimated as Average Revenue per Customer × Effective Customer Lifetime × Gross Margin. When a monthly churn rate is known, the effective lifetime is often approximated as 1 divided by the monthly churn rate.
What is CAC payback period?
CAC payback period is the number of months required for the gross profit from a customer to equal the cost of acquiring that customer. It is calculated as CAC divided by monthly gross profit per customer.
Why is CAC important for SaaS and subscription businesses?
For subscription businesses, CAC determines how much can be profitably invested in growth. Pairing CAC with LTV and payback period shows whether unit economics support scaling marketing and sales spend.
Is this Customer Acquisition Cost calculator free?
Yes. MoneyTool provides this customer acquisition cost calculator free for educational and planning use.
Can I save my CAC analysis?
Yes. Save Draft stores the calculator inputs in your browser. Print Results and Download PDF can be used to keep a copy of the displayed analysis.
LEGAL
Customer Acquisition Cost Calculator Disclaimer
This customer acquisition cost calculator provides estimates for informational and
educational purposes. It does not constitute financial, legal, tax, accounting, or
marketing advice. Actual CAC, LTV, and payback periods depend on your specific
business model, market, product mix, and cohort behavior.
Estimates only: Results depend on the inputs and assumptions described in the methodology.
Constant-retention assumption: Real-world churn varies by cohort and customer age.
Blended costs: Channel-level CAC is not modeled unless you run the calculator per channel.
Verify before planning: Use cohort-level analysis and, when appropriate, a qualified advisor before committing growth capital.
Last methodology review: .
Calculator logic and educational content should be reviewed again whenever the methodology,
supported inputs, or relevant external guidance changes.
