Next best offer after a first purchase: what customers buy next
The short answer
A next best offer comes from purchase sequences. For every customer whose first order was in your biggest category, record the category of their second purchase and the days between the two. The most common second category, and the median gap before it, tell you what to offer first-time buyers and when to send it.
Why it matters
The second purchase decides whether a new customer stays. Offering the wrong product, or the right one at the wrong time, wastes the window when a first-time buyer is most open to coming back and leaves the gap to a competitor.
The question to ask
Copy this into Lexi as written.
What the answer looks like
Illustrative output on sample data
Illustrative example: how Lexi answers this for a jewelry retailer. It follows 12,000 customers whose first purchase was earrings and records what the 4,300 who bought again chose next.
- Necklaces: 40%, median gap 74 days
- More earrings: 30%, median gap 41 days
- Rings: 20%, median gap 118 days
- Watches and other: 10%
What the data shows
Necklaces are the most common next purchase, at around ten weeks. Ring buyers are fewer but spend $890 in their first year, against $540 on the necklace path.
What it means
The fast second-earring path suggests gifts or matching pairs, which call for a different message.
What to do
Send earring buyers a necklace edit at about ten weeks and a gift reminder at six weeks.
Would you like me to build those two groups as segments for Klaviyo?
Frequently asked questions
What is a next best product recommendation in retail?
It is the product or category a customer is most likely to buy next, based on what similar customers bought after the same purchase. In retail it draws on purchase sequences, timing and value, and it shapes the follow-up email, the site recommendation or the store associate's suggestion for each customer.
Is the most common second purchase always the best next offer?
No. The most common path tells you what is easy to sell, while 12-month spend tells you what is worth selling. A less common second category can lead to customers who buy more often and spend more. Weigh both, and test offers on each path against a holdout group.
How many customers do I need for reliable purchase sequences?
Enough that each path you act on has a few hundred customers behind it, so one unusual month does not swing the result. Two years of history in your biggest category often gives that depth. Group rare second categories together until they have the numbers to stand on their own.