First-to-Second Purchase

Order reports that show most first-time buyers never placing a second order, even after the product's natural repeat-purchase cycle has passed, are the case for this journey. You need a defined repeat-purchase cycle per product or category, a first-purchase flag based on the customer's order count, a second-order definition that treats cancellations and returns consistently, email consent and SMS consent. If the first order suffered a late delivery or a return, fix that experience first; an offer does not repair a bad first experience, and for a category with no natural repeat, do not build this journey at all.

Incremental second-purchase rate vs control

An offer pays off only when more customers place a second valid order in the journey group than in the control group; an email click or a redeemed code says nothing on its own.

How it is counted: Count all first-time buyers assigned at entry to either group, and among them those who complete a second valid order within the same follow-up window after assignment, with one consistent rule for cancellations and returns. The gap between the two groups' shares is the journey's effect; message delivery or clicks do not change the denominator.

Also track

• Second purchase without an offerHow many customers place a second order during the natural wait, before any offer; when this is high, the wait is well chosen and the offer reaches fewer customers.
• Contribution per touchCount second orders after the email and after the SMS reminder separately; if the SMS adds no orders, consider removing that step rather than extending the offer window.
• Margin on the second orderIf a discount was used, read the margin on the second order alongside the repeat-purchase rate; if orders rise while margin melts away, replace the discount with a relevant product offer.
• Unsubscribes and SMS complaintsKeep an eye on unsubscribes after the offer email and on SMS complaints; a new customer's impression is shaped by these messages, and lost consent shuts down every later journey too.

• Trigger and entryA completed first purchase starts the journey, which then waits for the product's natural repeat-purchase cycle. Split first-time buyers at random at entry between the journey group and a control group that receives no offer; the wait runs the same way in both.
• Who must not enterScope is the first-time buyer; one flow opens per customer, and the offer sequence never starts for someone who orders again during the wait. Post-Purchase Follow-Up, which explains the delivered product, Predicted Replenishment, which forecasts depletion from history, Loyalty Program Activation and First Purchase Anniversary are separate journeys.
• Timing and channelsOnce the natural cycle has passed with no second order, an email carries a next-purchase offer based on the first order; wait 3 to 5 days. Still no order and SMS permitted: a final SMS reminder before the offer ends, then a wait through the offer window; the second order is checked before every touch.
• Exit and handoffWhen the second purchase happens at the end of the wait, after the email or within the offer window, the journey ends as repeat customer and the pending SMS is cancelled. Without SMS consent, or when the offer window passes with no order, the journey ends; there is no handoff.
• Frequency and consentTwo touches at most per customer: one email and, where permitted, one SMS. The offer stays relevant to the first order or its category and need not be a discount; if it is one, state its real conditions and weigh margin alongside repeat purchase.

1. 1A second-purchase rate in the journey group that does not exceed the control group means the offer handed discounts to customers who would have bought again anyway; more clicks or redeemed codes do not rescue it. Base the call on the second-order gap and on margin.
2. 2Any gap you find belongs to the natural wait you chose, this channel order and the length of the offer window. Credit the second order to one journey only if the same customer is also held in Post-Purchase Follow-Up, Predicted Replenishment or Loyalty Program Activation; a repeat customer leaves here, never re-enters, and their later purchases are not this journey's subject.
3. 3Do not judge a new customer a failure before their natural cycle has run; when the gap is small, wait for the cohorts that have completed the cycle, then compare each group's customers and second-order counts with the A/B test significance calculator. If it is not significant, collect more first purchases and run the same read again.