Subscription vs. one-time purchase: Should you ask shoppers to commit?
A coffee checkout test shows how a subscription can lead on repeat orders while an optional reminder leaves the business with more contribution.
Offer scheduled delivery when it improves contribution across the shoppers who see the offer. Keep a single order available and test a reorder reminder alongside the subscription. A shopper may welcome a prompt when the coffee runs low and still want to decide when to buy the next bag.
Make the next charge easy to explain
Suppose an online coffee seller is testing how to sell the same 12-ounce bag to first-time shoppers. All prices, costs, and results in this example are illustrative. Each bag costs $24 delivered. The team can test three checkout menus.
Menu | What the shopper can choose |
|---|---|
Single order | Pay $24 today. Place another order whenever you need coffee. |
Single order with optional reminder | Pay $24 today. Opt in to a reminder 25 days after your order. Any reorder requires a new checkout. |
Single order or scheduled delivery | Choose one bag for $24 or opt in to a bag every 28 days at $24 per delivery. Skip the next bag or cancel future deliveries online up to 24 hours before the next charge. A notice goes out three days before billing. |
Ask shoppers to explain what they would pay today, what triggers the next order, and how they would stop it. We can compare reactions to the checkout menus with a simulated coffee-buying audience and use follow-up questions to identify terms that need clearer wording before a live test. How Sapien works
This comparison holds the price per bag fixed. If you also want to test a subscription discount or a prepaid plan, define that as a separate question about the amount and timing of the charge. Our guide to monthly versus annual pricing
Give every first buyer the same time to reorder
Randomly assign eligible shoppers before showing them a menu. Keep each shopper in the same group across visits and hold the bag, delivered price, stock, and shipping terms constant. Give everyone 14 days from assignment to make a first purchase. Follow first purchasers for 42 days from payment. That covers the scheduled second charge and gives every group the same time to order again. Microsoft Research’s guidance on planning experiments
Count a repeat buyer when a shopper completes a second paid order within the follow-up window and both orders remain paid after the same refund reconciliation period. Divide by all assigned shoppers to compare menus, since the menu can affect whether someone orders at all. Also report repeats among first buyers to see what happened after that first purchase.
Use the same assigned base for contribution. Subtract refunds, payment fees, product, packing and fulfillment costs, and the variable costs of reminders or subscription support from receipts. In the example, each order contributes $8 before the cost of running its menu. There are no refunds or third orders in the window. Reminders cost $12 for the group. Scheduled delivery adds $60 in billing and support costs.
Read repeat orders beside contribution
Menu and paid orders | Contribution per assigned shopper |
|---|---|
Single order. 120 first orders. 36 repeats out of 300 assigned, or 12.0%. | $1,248 ÷ 300 = $4.16 |
Optional reminder. 124 first orders. 48 repeats out of 300 assigned, or 16.0%. | $1,364 ÷ 300 = $4.55 |
Scheduled delivery. 110 first orders. 50 repeats out of 300 assigned, or 16.7%. | $1,220 ÷ 300 = $4.07 |
Among first buyers, the scheduled menu leads at 50 of 110, or 45.5%, compared with 48 of 124, or 38.7%, for the reminder. Across the same 300 assigned shoppers, it produces only two more repeats. It also has 14 fewer first orders and higher costs, leaving $144 less contribution than the reminder menu.
Take the reminder into a larger comparison with the single-order menu. Set the smallest contribution gain that would justify expanding it before running the next test. Use the table to keep the purchase base and menu costs in view, and review refunds and billing complaints alongside repeat orders. If you revisit scheduled delivery, check whether shoppers can understand and use the skip and cancel controls before expanding it.
