A lapsed customer and an unengaged subscriber are not the same person, and treating them the same is how brands waste their best retention opportunity. One already paid you, proved they would open their wallet, and then went quiet. The other may never have bought anything at all.
Customer reactivation is the work of winning back the first group, the buyers who lapsed, and it needs a different playbook than the one you run on cold subscribers. It is one of the most common gaps we find when we audit a retention program.
This post covers where the line sits, when a buyer counts as lapsed, what to actually say to them, and when to let them go.
TL;DR
- A lapsed buyer already paid you once; an unengaged subscriber may never have bought. They need different campaigns.
- "Lapsed" is relative to your purchase cycle, so derive it from your own median time between orders.
- A discount is usually the wrong opener for someone who already bought at full price. Lead with a reason to return first.
- At some point a lapsed buyer is gone, and continuing to mail them costs more than it returns.
Reactivation vs Sunsetting: Two Different Lists
The first rule of customer reactivation is that it is a different job from sunsetting a cold list. A reactivation campaign, sometimes called customer win-back, targets people who bought from you and then stopped. Sunsetting targets unengaged subscribers who may have signed up and never purchased. Same silence, very different value, and the two call for opposite treatment.
| Lapsed buyer | Unengaged subscriber | |
|---|---|---|
| What they are | Bought before, then went quiet | Signed up, may never have bought |
| What they are worth | Proven revenue, already acquired | Unproven, often dead weight |
| What they should get | A reason to return, product-led | An engagement test, then a wind-down |
| Confuse them and | You risk cutting paying customers | You keep mailing people who never convert |
Run both groups through one generic flow and you get the worst of both: paying customers treated like strangers, and strangers treated like they owe you a second order. The rest of this post stays on the buyer side of that table.
When a Customer Counts as Lapsed
There is no universal number of days that makes a customer lapsed, because it depends entirely on how often your product gets bought. A 90-day gap is alarming for a coffee brand and completely normal for a winter coat. The only honest definition comes from your own data: find the median time between orders for your repeat customers, then treat a buyer as lapsed once they pass a meaningful multiple of it.
A practical starting point is two to three times the median gap. If repeat customers usually reorder every 40 days, someone who has gone past 100 days without buying has clearly broken their pattern and become a genuine reactivation target. This is the same logic as segmenting on purchases, built on what someone bought and when they bought it. Platforms are starting to do this math for you: BigCommerce's predictive customer analytics forecast the next 12 months of revenue for customers with six months of order history.
What a Reactivation Campaign Should Say
A reactivation campaign should open with a reason to come back before it reaches for a discount. The person already paid full price once, so leading with a coupon trains them to wait for the next one and quietly signals the product was overpriced to begin with. A stronger opener reminds them why they bought in the first place: a new arrival in the category they shopped, a restock of the exact item, or a genuine nudge that you noticed they had been away.
Hold the incentive for later in the sequence, and use it only if the reminder alone falls flat. When a discount does become the right call, size it deliberately, which is its own discount strategy question. The brands that get reactivation right treat it as a timing and relevance problem, the way a lifecycle timing rebuild grew email and SMS revenue 9x in 30 days by matching messages to where the customer actually was.
“Brand loyalty is no longer a default; it is a continuously earned state. Success belongs to brands that provide value between purchase cycles.”
When to Stop Trying
Not every lapsed buyer comes back, and running reactivation well means knowing when to stop. A customer who has ignored several well-timed, relevant reminders across a full purchase cycle has most likely moved on, and mailing them past that point costs more in sender reputation than it returns in orders.
That is the moment reactivation ends and the wind-down begins. Once a buyer has gone fully cold despite a real effort to win them back, they graduate out of your reactivation campaign and into the same sunset process you run on any dead contact. The mechanics of that wind-down, and the exact point to stop sending, live with the sunset flow rather than here, because reactivation's job is done the moment a buyer stops responding to reasons and starts needing a suppression rule.
Where Reactivation Sits in the Retention Program
Reactivation is one flow inside a larger retention email marketing program, and it works best when the flows ahead of it have already done their job. When the welcome flow is converting first orders, post-purchase is earning the second, and replenishment is catching reorders on time, far fewer customers ever reach the lapsed stage at all. Reactivation is the safety net that catches whoever the earlier flows missed.
That is why it sits near the end of the five core flows, working the customers who slipped through everything upstream. Building that full system, and deciding how much to invest in reactivation versus the flows that prevent lapsing in the first place, is the work our Klaviyo team does for retention-driven brands every day.
Frequently Asked Questions
1. What Is Customer Reactivation?
Customer reactivation is the practice of winning back people who bought from you before and then went quiet. It targets proven buyers, not subscribers who never purchased, and uses relevant, well-timed messages to bring them back for another order. Done right, it recovers revenue from customers you already paid to acquire.
2. How Is Reactivation Different From a Win-Back Campaign?
In practice the terms are used interchangeably, and a win-back campaign is the tactic most reactivation programs run on. If you draw a line, reactivation is the broader goal of re-engaging lapsed customers, while a win-back campaign is the specific sequence that does it. Both focus on buyers who already purchased once.
3. When Should You Consider a Customer Lapsed?
When they pass a meaningful multiple of your median time between orders. A practical starting point is two to three times that gap. There is no fixed day count, because a normal reorder cycle for coffee looks nothing like one for outerwear. Derive the threshold from your own repeat-purchase data rather than a generic rule.
4. What Should a Reactivation Email Offer?
Lead with a reason to return before an incentive: a new product in their category, a restock of their item, or a simple acknowledgment that they have been away. Save a discount for later in the sequence, and only if the reminder alone does not work, since discounting a proven buyer too early erodes margin.
5. How Many Reactivation Emails Should You Send?
Enough to make a genuine effort across one purchase cycle, typically three to four messages spaced to match how often the product is bought. Beyond that, continued sending to a customer who never responds does more harm to your sender reputation than good. When the effort is exhausted, move them to the sunset process.