Progressive CAC Calculator
Begin with the number you need. Add context when you are ready.
Quick CAC
CAC + Payback
Full unit economics
What is CAC?
Customer Acquisition Cost is the average amount spent to acquire one new customer. The quick formula is CAC = total acquisition spend ÷ new customers acquired. This calculator starts there so beginners get a useful answer without completing a full financial model.
Why payback and LTV matter
CAC tells you what acquisition costs. Payback tells you how quickly gross profit recovers that cost. Lifetime Value estimates the gross profit a customer can create over the relationship. Together, they help you judge whether growth is financially sustainable rather than optimising only for a cheap first conversion.
Use category adjustments carefully
E-commerce CAC can account for returns and RTO. SaaS LTV can use churn when it is available. EdTech can convert lead volume into cost per admission. B2B and services CAC can include sales-team cost. Marketplace businesses should keep supply and demand economics separate instead of hiding them inside one blended number.
Built for practical campaign reviews
Use this tool as a fast diagnostic alongside contribution margin, retention, attribution and cash-flow analysis. For a deeper acquisition audit, get in touch with the Vakya Labs team.
Why CAC Alone Doesn't Tell the Full Story
A raw CAC is only useful when compared with what a customer is worth. ₹500 can be expensive for a ₹300 product and excellent for a ₹40,000 coaching admission. That is why the calculator also shows payback period and LTV:CAC when you add more detail.
Payback Period: How Fast Do You Get Your Money Back?
Payback Period (months) = CAC ÷ (Monthly Revenue per Customer × Margin %)
For example, a ₹500 CAC with ₹800 monthly revenue and a 40% margin creates ₹320 monthly profit per customer. Payback is ₹500 ÷ ₹320 = 1.56 months. Under six months is generally fast; beyond twelve months deserves a closer look at cash flow and pricing.
LTV:CAC: Are You Getting a Good Deal?
LTV = Average Order Value × Purchase Frequency × Customer Lifespan × Margin %
At ₹800 average order value, one purchase per month, eight months of lifespan and a 40% margin, LTV is ₹2,560. Against a ₹500 CAC, the LTV:CAC ratio is 5.1:1.
| Ratio | What it tells you |
|---|---|
| Below 1:1 | You're losing money on every customer. |
| 1:1 to 3:1 | Sustainable, but there is room to improve efficiency. |
| 3:1 to 5:1 | Healthy and potentially scalable acquisition. |
| Above 5:1 | Very efficient; you may be under-investing in growth. |
Why the Right CAC Changes by Category
E-commerce / D2C: Returns and RTO, especially on COD orders, increase effective CAC. SaaS: recurring revenue and churn determine LTV more reliably than a guessed lifespan. EdTech: cost per lead is not CAC; divide by admissions to find the real cost per customer. Services and B2B: sales-team salary and time are acquisition costs. Marketplaces: calculate supply and demand sides separately so one expensive side is not hidden by a blended average.
How to Use This Calculator
- Start simple with total acquisition spend and new customers.
- Add average order value and margin to see payback.
- Select a business category to reveal only relevant adjustment fields.
- Read the plain-language verdict and compare CAC with LTV.
You do not need to fill every field at once. Even a basic CAC is a useful gut-check before increasing your ad budget.
Frequently Asked Questions
What is a good CAC?
There is no fixed number. Judge CAC against customer lifetime value and your margin, not against a generic industry figure.
Is CAC the same as cost per lead?
No. Cost per lead counts interested people; CAC counts people who actually became paying customers. The gap is especially important in EdTech and services.
Should I include sales-team cost?
Yes, when people spend time closing deals. Leaving out labour produces an artificially low CAC.
How often should I calculate CAC?
Monthly is a practical rhythm for most businesses: frequent enough to catch problems without overreacting to daily noise.
Does a high CAC mean I should stop advertising?
Not necessarily. Check payback and LTV:CAC first. High CAC with high lifetime value can still be a strong business.
Built From Real Campaign Work
Vakya Labs built this calculator after repeatedly answering the same question while managing paid campaigns for e-commerce and EdTech brands: “Is this CAC actually okay?” For a deeper acquisition audit, talk to our team.