Industry benchmarks for Ecommerce Subscription Boxes
Subscription ecommerce needs CAC back in roughly 3 months because monthly churn of 6 to 11 percent gives you a short window to work with. CAC runs $40 to $90 per subscriber on paid social, where creative fatigue and rising CPMs move the number more than any other input. Monthly order value sits at $30 to $60 with contribution margin of 50 to 62 percent after COGS, packaging, shipping, and payment fees. At $65 CAC against $23.10 in monthly contribution, payback is 2.8 months, meaning roughly the third box is where the customer turns profitable.
The decisive lever is the month-2 and month-3 retention cliff, where most boxes lose 30 to 45 percent of a cohort. Skip and pause options outperform cancellation flows, customization reduces the boredom churn that drives most cancellations, and prepaid 3 or 6 month plans convert an uncertain LTV into cash collected upfront. Shipping and fulfillment cost is the quiet margin killer, so model contribution margin rather than product gross margin. Cohort curves matter more than blended churn here, because a single strong promo month can mask a deteriorating base.
Frequently asked questions
CAC Payback Estimator for Ecommerce Subscription Boxes, answered.
Should I use gross margin or contribution margin?
Contribution margin. Subtract COGS, packaging, outbound shipping, and payment processing before calculating payback, or you will overstate profitability by 15 to 20 points.
What is a normal month-1 to month-2 drop?
Losing 25 to 40 percent of a cohort between the first and second box is common. If you are above 45 percent, the problem is usually acquisition targeting or an offer that oversold the first box.
Do prepaid plans improve LTV:CAC?
They improve cash flow and guarantee a minimum lifetime, but the discount reduces margin. Net effect is usually positive if the discount is under 20 percent and the plan is 3 months or longer.