CAC payback calculator
Do customers pay back within 6 months? Months until a customer pays back what you spent to get them.
Free answer on screenAbout a minuteYour numbers stay in your browser
Do customers pay back within 6 months?
YES
Full breakdown
Three fixes for your numbers
- Reorder reminders timed to usage
- Second-order offer in the parcel
- Bid for repeat buyers, not one-time deal hunters
See the full breakdownThe numbers behind your answer and three fixes, also sent to your WhatsApp.
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Book a callHow it is calculated
Worked through with the typical numbers already in the calculator.
What you get
- Profit on the first order
- Months until a customer pays back what you spent
- 12-month profit for every rupee of CAC
| Step | Formula | Result |
|---|---|---|
| Profit on the first order | ₹1200 × 45% margin | ₹540 |
| Left to recover | ₹600 CAC − ₹540 | ₹60 |
| Payback | ₹60 ÷ (₹540 × 1.8 repeat orders ÷ 12 months) | 0.7 months |
| 12-month profit ÷ CAC | ₹540 × (1 + 1.8) ÷ ₹600 | 2.52 |
What a good number looks like
We pair payback with 12-month profit ÷ CAC. Below 1, customers never pay back within the year.
| How we read payback | |
|---|---|
| First order pays back | Room to spend more and grow faster |
| Under 6 months | Healthy for most D2C brands |
| 6 to 12 months | Fine with strong cash flow and repeat buying |
| Over 12 months | Fix repeat orders or CAC before scaling |
This page was updated in October 2026 and reviewed by our senior marketing team.
Mistakes that make this number wrong
We see these in most accounts we audit.
Using blended CAC
Blended CAC includes customers who would have bought anyway. Use the cost of new customers from paid channels.
Counting revenue, not margin
Payback should come from margin per order, not from what the customer pays.
Assuming repeat orders you do not have
Use your real 12-month repeat rate, not the one you hope for.
Ignoring time
A customer who pays back in 14 months still needs cash funded until then.
How to improve it
These are the four levers we pull first, and the service behind each one.
Lever 1
Win the second order
We run replenishment and next-purchase flows on WhatsApp and email.
Fixed by retention marketingLever 2
Lower CAC
We refresh creative weekly and move budget to the best-paying audiences.
Fixed by performance marketingLever 3
Raise first-order margin
We use bundles, starter kits and free-shipping thresholds.
Fixed by website conversionLever 4
Measure true CAC
We measure the incremental cost per new customer, not the platform-reported one.
Fixed by tracking and measurementDefinitions and questions
What is CAC?
CAC is customer acquisition cost: what you spend to win one new customer.
What is payback?
Payback is the number of months of margin from a customer that it takes to cover what you spent to win them.
Why is six months the target?
Under 6 months lets most D2C brands grow without running out of cash.
What counts as CAC?
Total marketing spend to win new customers divided by the number of new customers, not all orders.
Why use margin and not revenue?
Revenue does not pay back ad spend. Only the margin left after product, shipping and fees does.
What numbers do I need?
You need your cost to win a customer, average order value, margin per order and how many repeat orders a customer makes in 12 months.
How do I shorten payback?
Win the second order with reminders, lower CAC with better creative and raise first-order margin with bundles.
Is a long payback always bad?
Not if you have strong cash flow and customers reorder often, but over 12 months usually means fixing repeat orders or CAC before scaling.
Does this include marketing on all channels?
Use your total spend to win new customers across all channels, divided by the number of new customers.
How often should I check payback?
Check it every quarter, and after any big change in price, CAC or repeat rate.
60 seconds
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