We identify expensive acquisition
We see which channels and campaigns run high CAC and low return.
Stops budget waste and redirects investment to channels that actually sell.
See your customer economics in numbers
Use interactive calculators to estimate your new-customer acquisition cost (CAC), retention cost and repeat-sales potential. Compare, and decide with data.
Enter a few numbers and instantly see where the biggest value - or the biggest leak - sits in your sales and marketing process.
Supported KPIs
The numbers Funnelion.ai keeps live
New customer acquisition
- Real sale conversion rate
- Cost per won customer
- Channel-to-revenue ROI
- Lead quality by source
Existing customer retention
- Churn risk rate
- Retention revenue at risk
- Complaint / negative sentiment rate
- Repeat issue rate
- Customer health score
Repeat sales
- Upsell / cross-sell opportunity rate
- Plus contextual signals where relevant
1. New customer acquisition cost - CAC
CAC shows what one new customer really costs over a period or campaign - including media, creative, agency and sales time.
Formula: CAC = total acquisition cost / new customers
Total spend
Enter the number of new customers
CAC
Enter the number of new customers
If you only watch lead count, you can pour budget into a “cheap” channel that never actually closes. CAC fixes that.
2. Retention / repeat sale cost
How much it costs on average to retain a customer or land a repeat purchase - across CRM campaigns, account management and remarketing.
Formula: Retention / repeat sale cost = retention spend / retained or repeat-buying customers
Total spend
Enter the number of repeat customers
Retention cost
Enter the number of repeat customers
Once you see this, it becomes obvious how much attention existing customers, churn risk and upsell signals deserve.
A practical example
When you look at channels and segments together, the picture changes
| Channel | Leads | Sales | Revenue | Spend | Cost / sale |
|---|---|---|---|---|---|
| Google Ads - new customers | 120 | 12 | €36,000 | €6,000 | €500 |
| Meta Ads - new customers | 80 | 4 | €12,000 | €2,500 | €625 |
| Existing customers / CRM follow-up | 40 | 10 | €30,000 | €700 | €70 |
Numbers below are illustrative.
You can clearly see which channels and customer segments actually pay back.
In this example existing customers generate a smaller per-sale cost and a large share of revenue. That doesn’t make new-customer channels useless - it just shows why you have to measure the full revenue path.
How Funnelion.ai helps
From “we should know this” to a number on the screen
We detect retention risks
We track churn risk, revenue at risk and negative trends.
Protects revenue from customers you already won.
We find hidden expansion
We surface repeat-purchase and upsell / cross-sell potential.
Grows revenue from your existing base - no extra acquisition budget required.
Turn numbers into action
Funnelion.ai not only calculates CAC and retention cost - it tracks them automatically from your calls, forms, emails, CRM and files.