How to Use the Subscription Box Profit
Subscription boxes live or die on retention — a profitable-looking first box means little if churn eats the customer before you recoup acquisition costs. This calculator shows your profit per box, then projects subscriber lifetime value based on your churn rate so you can see whether your CAC is actually sustainable.
Step-by-Step Guide
- 1
Enter your box price charged per shipment.
- 2
Enter product cost, packaging cost, and shipping cost per box.
- 3
Add your payment processing fee %.
- 4
Enter your monthly churn rate to estimate average subscriber lifespan.
- 5
Enter your active subscriber count for total monthly profit.
- 6
Add your customer acquisition cost (CAC) to see LTV minus CAC.
Subscription Box Profit Formula
Profit per Box = Box Price − Product Cost − Packaging − Shipping − Payment Fee Avg. Lifespan = 1 ÷ Monthly Churn Rate Subscriber LTV = Profit per Box × Avg. Lifespan
Worked Example
Box price: $39. Product: $14. Packaging: $2.50. Shipping: $6. Payment fee: 2.9% = $1.13. Churn: 8%/mo. CAC: $25. Total Cost = $14 + $2.50 + $6 + $1.13 = $23.63 Profit per Box = $39 − $23.63 = $15.37 Avg. Lifespan = 1 ÷ 8% = 12.5 months Subscriber LTV = $15.37 × 12.5 = $192.13 LTV − CAC = $192.13 − $25 = $167.13
Understanding your result
Calculator results depend entirely on the information entered. For the most useful estimate, use current and accurate figures and include all costs that apply to your specific situation.
Frequently Asked Questions
What's a normal churn rate for subscription boxes?
Subscription box churn tends to run higher than typical SaaS — 5–10% monthly is common, though it varies widely by niche, box price point, and how well the box maintains novelty over time.
How does shipping cost impact subscription box margins?
Shipping is often the single largest hidden cost, especially for heavier or bulkier boxes — negotiating carrier rates, using regional carriers, or adjusting box size/weight can meaningfully improve margin.
Should I include packaging design costs in COGS?
Branded packaging (boxes, inserts, tissue paper) should be included as a per-unit cost since it recurs with every shipment, unlike a one-time design fee which is better treated as a separate upfront cost.
How do I calculate subscriber LTV for a box business?
Multiply your profit per box by the average number of boxes a subscriber receives before churning (1 ÷ monthly churn rate), which accounts for the recurring nature of the revenue.
What LTV:CAC ratio should a subscription box business target?
The same general 3:1 benchmark used across subscription businesses applies well here — if LTV isn't at least 3x your CAC, you likely don't have enough margin to profitably scale paid acquisition.