Key takeaways
- A $100 subscription can lose money and a $40 subscription can make money, depending on CAC payback.
- CAC payback resolves inside 90 days, while LTV is a projection resting on a guessed churn rate eighteen months out.
- Pulling CAC payback from day 60 to day 30 doubles how often the same acquisition money turns, from six times a year to twelve.
You can make money on a $40 subscription.
And you can lose money on a $100 subscription.
Even a 30% 90-day retention rate can be good.
And 70% 90-day retention can be brutal.
It all depends on your CAC.
30% retention on a $20 CAC pays back in month one.
70% on a $200 CAC does not pay back before most of that cohort is gone.
We aim for 70% with the brands we work with, and it still loses money if you paid too much to get there.
One number that I always ask on a sales call before LTV or retention.
Payback period.
Time it takes you to recover your CAC and breakeven on the customer.
That tells you how fast you are allowed to grow.
Lifetime is a number you collect later.
Payback is money already in the account.
Take a subscriber at $45 a month, 60% margin.
That is $27 of gross profit a month.
You paid $60 to acquire them.
Order 1 returns $27. Order 2 takes you to $54. Order 3 clears the $60.
Payback lands at order 3, around day 60.
Now the part most brands never run. That $60 is free again on day 60, so it buys the next customer six times a year.
Pull payback to day 30 and the same money turns twelve times.
Same spend, same margin, twice the growth out of the same cash.
The bands, so you can place yourself
- Day 30. Order 2 pays you back and everything after it is profit.
- Day 60 to 90. Where most subscription brands sit.
- Past 90. You are funding acquisition from savings, a credit line, or someone else’s money.
- Day 120. You are asking a subscriber to survive four billing cycles before they break even, and 30 to 40% of the cohort is gone by cycle three.
That is why LTV cannot do this job.
It is a projection resting on a churn rate you are guessing at, eighteen months out.
Payback resolves inside 90 days and you can watch it land.
Six things move the payback date
First order size. A 3-month supply at $81 of gross profit pays you back on day one. Every other lever is arithmetic after this one. Most brands hide the option in a dropdown.
Post-purchase prepay. For the ones who picked monthly anyway. Right after checkout, one click to prepay the next two months at 15% off with a free gift. Two months at $45 is $76.50 after the discount, roughly $46 of gross profit landing the same day as the first order. That is $73 on day zero against a $60 CAC. Paid back before the first box ships.
Add-ons before order 2. Three days before order 2 processes, the upcoming-order SMS lets them reply ADD to attach a $20 complementary item. Order 2 profit goes from $27 to $41, cumulative hits $68, and breakeven moves from order 3 to order 2. One reply, thirty days earlier.
Order 2 survival. Payback lives in months one to three, exactly where the cohort thins out. A subscriber who leaves at order 2 never paid you back. They were a marketing expense with a shipping cost.
Passive churn in the first 60 days. A card that declines in month two takes the whole payback with it.
Rewards early, not late. The gift at order 10 arrives long after the money came back. At order 2 it protects the payback.
Notice what is missing. Nothing about month 12. Nothing about the anniversary discount, the loyalty tier, the win-back at day 180.
Those lengthen lifetime. They do nothing for the cash you need next month.
Fix the first 90 days and the twelfth month takes care of itself.
Chase the twelfth month first and you run out of money before you reach it.
