Subscription Box Cost Calculator

Enter your subscription box details

Use realistic costs for packaging, shipping, labor, and fees to avoid surprises.

Currency

Price per box

Customer-facing price before discount and tax.

Discount per box

Coupons, first-box discount, or promo credit.

Tax rate (%)

Used for fee base if fees include tax.

Fee basis

Some processors charge fees on tax too.

Target margin (%)

Used to compute a suggested target price.

Payment fee (%)

Payment fixed fee

Platform fee (%)

Platform fixed fee

Product cost per box

Packaging cost

Fulfillment labor (minutes)

Labor rate per hour

Shipping cost per box

Marketing cost per order

Overhead per box

Storage, inserts, labels, tools, and admin overhead.

Loss rate (%)

Returns, damages, replacements, and re-shipments (expected).

Shipments per month

Subscription length (months)

Starting subscribers

Monthly churn (%)

Percentage of subscribers who cancel each month.

CAC per subscriber

Ads, affiliates, discounts, and onboarding spend.

Results appear above this form after submit.

Example data table

This sample scenario shows how costs and fees affect profit per box.

Scenario	Price	Product	Shipping	Fees	Variable cost	Profit	Margin
Starter box	$39.99	$12.00	$6.00	$1.46	$26.96	$13.03	32.6%
Heavier box	$44.99	$14.50	$9.25	$1.62	$32.90	$12.09	26.9%

Fees above assume 2.9% + $0.30 on subtotal, no tax. Your results may differ.

Formula used

Customer subtotal = max(Price − Discount, 0).

Tax = Subtotal × Tax rate. Tax is treated as pass-through.

Fee base = Subtotal (or Subtotal + Tax, if selected).

Processing fee = Fee base × Payment % + Payment fixed.

Platform fee = Fee base × Platform % + Platform fixed.

Labor cost = (Labor minutes ÷ 60) × Labor rate/hour.

Expected loss cost = Loss rate × (Product + Packaging + Labor + Shipping).

Variable cost per box = Product + Packaging + Labor + Shipping + Marketing + Overhead + Fees + Expected loss.

Gross profit per box = Net sales − Variable cost, where Net sales = Subtotal.

Break-even price solves Gross profit per box = 0, including percent and fixed fees.

How to use this calculator

Enter your selling price, discounts, and any tax rate.
Add product, packaging, shipping, labor, and overhead costs.
Set payment and platform fees, including fixed charges.
Choose whether fees apply to subtotal or total.
Add churn and CAC to forecast cohort profitability.
Click Calculate to see profit, margin, and pricing targets.
Download CSV or PDF to share with your team.

FAQs

1) What does “variable cost per box” include?

It includes product, packaging, labor, shipping, overhead per box, marketing per order, payment fees, platform fees, and an expected loss allowance from returns or damages.

2) Why is tax not counted as revenue?

Tax is usually collected from customers and remitted to authorities. This tool treats it as pass-through, so profit uses net sales excluding tax.

3) Should I set fees on subtotal or total?

Some providers charge fees on the full charge including tax, while others charge on subtotal. If you are unsure, run both options and compare sensitivity.

4) How is churn applied in the forecast?

Active subscribers are estimated monthly using an exponential curve: start × (1 − churn)^(month − 1). This gives a quick cohort-style projection.

5) What is CAC and how does it affect profit?

CAC is acquisition cost per subscriber, such as ads, affiliates, or welcome discounts. The calculator subtracts CAC upfront from cumulative profit to show cohort profitability.

6) How do I pick a loss rate?

Start with your historical replacement, damage, and refund percentages. If you lack data, test 1–5% and see how margins change. High shipping complexity often needs a higher rate.

7) What if my subscription ships weekly?

Increase shipments per month, for example 4.3 for weekly averages. The projection multiplies active subscribers by shipments per month to estimate boxes shipped.

8) Is the target-margin price guaranteed?

It is a pricing estimate based on your inputs and fee assumptions. Real performance can change with carrier rates, supplier changes, promotions, and regional tax rules.