Definition
The Defected Portfolio is the set of customers who purchased in P2 (13–24 months ago) but did not purchase in P1 (current 12 months). They shopped last year and have not this year. Defected is the hardest portfolio to recover but the one that reveals the most about why customers leave. Prior-period quintile rank is preserved so operators can prioritize recovery investment by historical value.
How the Defected Portfolio works
A customer enters the Defected Portfolio when the AMT methodology detects purchase activity in P2 with no follow-on activity in P1. The classification is binary at the portfolio level — the customer has stopped engaging with the brand within the most recent 12-month window — but the customer's prior quintile rank (from P2) is preserved as part of the classification. A customer who was Q1 Stable in the previous cycle and has now defected is classified as "Defected Q1," signaling that the customer who left was historically a top-tier buyer.
The prior-quintile preservation is what makes the Defected Portfolio operationally manageable. Defection looks the same in aggregate — a customer who is gone — but defected customers are not equivalent in recovery value. A Q1 Defected customer who was spending $1,200 per year before they left justifies a recovery offer that would be irrational to extend to a Q5 Defected customer who was spending $80 per year. Treating all Defected customers as a single audience produces either over-investment in low-value recovery or under-investment in high-value recovery.
If a Defected customer eventually returns and resumes purchasing in a future period, they will reclassify into Reactivated at that point. Defected and Reactivated are two halves of the same recovery question — the customer is either still gone or has come back.
Why the Defected Portfolio matters in 2026
Defection in 2026 is the most expensive event on the customer file. The cost to replace a Defected customer with a new acquisition is at record highs, which means every Q1 or Q2 Defected customer represents a recovery opportunity worth substantially more than the cost of an aggressive personalized offer. Operators who do not segment their Defected Portfolio by prior quintile end up running flat recovery campaigns that under-invest in the customers worth recovering and over-invest in the ones who would defect again.
How the Defected Portfolio differs from "churned customers"
"Churned customers" is SaaS-imported vocabulary applied loosely to anyone whose engagement has stopped. The Defected Portfolio is a precise classification: purchase activity in P2 and no activity in P1, with the prior P2 quintile preserved. Retail and DTC defection is also structurally different from SaaS churn — there is no contract end date, no subscription to cancel. A customer simply stops, and the only signal of their departure is the absence of activity. The Defected Portfolio is the retail-native version of churn, with the additional richness of prior-quintile context.
How to apply the Defected Portfolio to your store
- Segment Defected customers by their P2 quintile. Q1 and Q2 Defected customers are the priority recovery targets; Q4 and Q5 Defected are lower-priority and may not justify recovery spend at all.
- Build recovery offers that scale with prior-quintile value. A Q1 Defected customer worth $1,200/year in their prior life justifies a $50 recovery offer; a Q5 Defected customer worth $80/year does not.
- Measure recovery by reclassification, not by single-transaction return. A Defected customer who places one recovery order and disappears again has not actually been recovered — they reclassify back to Defected in the next cycle. Recovery is measured by whether the customer reaches Reactivated, then Growth or Stable in subsequent periods.
Related terms
FAQ
Q: What is a Defected customer in customer portfolio management?
A: A Defected customer is one who purchased in the prior 12 months (P2) but did not purchase in the current 12 months (P1). The customer's prior quintile rank from P2 is preserved as part of the classification, allowing operators to prioritize recovery investment by historical customer value.
Q: How is the Defected Portfolio different from churned customers?
A: "Churned" is SaaS vocabulary applied loosely. The Defected Portfolio is a precise classification — P2 activity with no P1 activity — with the customer's prior quintile preserved. Retail defection also differs from SaaS churn structurally because there is no contract end date. The customer simply stops, and the only signal is the absence of subsequent activity.
Q: Should I send recovery offers to all Defected customers?
A: No. Recovery spend should match the customer's prior quintile. Q1 Defected customers (top-tier customers who left) justify aggressive personalized recovery offers because the lifetime value at stake is high. Q5 Defected customers (low-value customers who left) often do not justify recovery investment at all — the recovery economics rarely work, and the operator's effort is better spent on acquisition or on Declining-Portfolio retention.
Read next
- From the Customer Portfolios pillar: Customer Portfolio Management: The Six Behavioral States of Every Store
- Tactical playbook: The Defected Portfolio: Recapture Spend Should Match Prior Quintile
- Related portfolio: Reactivated Portfolio (Defected customers who eventually return)
Last reviewed: May 21, 2026. This definition is maintained as part of the Customer Portfolios pillar.