CAC Calculator
Calculate your customer acquisition cost, lifetime value, LTV:CAC ratio, and payback period — the unit economics every lender and investor evaluates when sizing up a business.
Acquisition Costs
All spend in the same period (monthly, quarterly, or annual)
Ads, content, SEO tools, agency fees, events
Rep salaries, commissions, CRM software
Referral bonuses, onboarding, free trial costs
Customers Acquired
Paying customers acquired in the same period as your cost inputs
Customer Value(for LTV & ratio)
Used to calculate lifetime value and LTV:CAC ratio
Average monthly revenue a customer generates
Revenue minus direct costs (e.g. 60%)
How long the average customer stays
Results
Marketing Costs
Paid advertising, agency and freelancer fees, content production, SEO tools, trade show costs, and email marketing platforms. These are the most visible costs but rarely the full picture.
Sales Costs
Sales rep salaries (acquisition-related portion), commissions, CRM and sales tools, demo software, and sales training. Excluding these causes you to significantly undercount your true CAC.
Other Acquisition Costs
Referral and affiliate payouts, free trial hosting and support, onboarding costs tied to conversion, discounts and promotions, and partner co-marketing spend.
LTV:CAC Benchmarks
The LTV:CAC ratio is the single most important unit economics metric. Here is how to interpret yours.
| LTV:CAC Ratio | Signal | What It Means |
|---|---|---|
| Below 1:1 | Critical | Losing money on every customer. Fix pricing, churn, or acquisition costs before scaling. |
| 1:1 – 2:1 | Marginal | Breaking even or barely profitable. Not sustainable for a growth business. |
| 2:1 – 3:1 | Below benchmark | Approaching the target. Focus on improving retention or reducing CAC. |
| 3:1 | Benchmark ✓ | The minimum most investors and lenders look for in a healthy business model. |
| 4:1 – 5:1 | Strong | Healthy unit economics. You have room to increase spend and still grow profitably. |
| Above 5:1 | Very strong | Excellent — but check whether you are under-investing in growth. High ratios can signal an opportunity to acquire more customers profitably. |
Key Considerations
Blended vs. channel CAC
This calculator computes blended CAC. Your best channels may have a CAC 3–5× lower than your worst. Track by channel to find where to shift budget.
CAC trends over time
Rising CAC quarter-over-quarter signals that cheap acquisition sources are becoming saturated. Flat or declining CAC while growing volume is a strong efficiency signal.
Cohort LTV vs. average LTV
Customers acquired through different channels often have different LTVs. A referral customer may have 2× the lifespan of a paid search customer. Track LTV by acquisition source.
Payback period and cash flow
A 12-month payback period means you need 12 months of cash tied up per customer before breaking even. Fast-growing businesses with long paybacks often need external financing.
CAC does not include retention
Once acquired, customers require ongoing service and support costs. Use contribution margin — not gross revenue — for the most accurate LTV estimate.
Scaling raises CAC
Most businesses find CAC increases as they scale — the cheapest acquisition channels get tapped out first. Build this into your growth projections to avoid margin compression surprises.
Frequently Asked Questions
Related Resources
Marketing ROI Calculator
Measure the return on your acquisition spend across channels.
Break-Even Calculator
Find the revenue threshold where acquisition costs pay off.
Business Valuation Calculator
Strong unit economics increase your company's valuation multiple.
Employee Cost Calculator
Include sales team costs in your true customer acquisition cost.
Ready to Scale
Ready to fund your next growth push?
If your LTV:CAC ratio supports it, a line of credit or revenue-based advance can let you scale acquisition spend before the revenue catches up. A Pezzula advisor can help you find the right structure.