How Should Fashion Brands Calculate CLTV After Returns, Discounts, Fulfillment, and Product Costs?

Short answer

Calculate contribution CLTV as cumulative net revenue per customer, less returns, discounts, COGS, fulfillment, reverse logistics, and payment fees, measured by acquisition cohort at fixed horizons of 90, 180, and 365 days. Gross CLTV overstates value by roughly the margin rate and, in returns-heavy apparel, can overstate it by more than half.

The formula

Contribution CLTV (365d) = Σ [ (net revenue per order − discount − COGS − fulfillment − reverse logistics − payment fees) ] ÷ customers in the cohort

Fix the horizon. Do not use a predictive lifetime model in a board pack — an unbounded projection is an argument, not a measurement.

Worked example (apparel cohort, 365 days)

Against a fully loaded CAC of $58, CLV:CAC is 2.1x — well below the 3.0x threshold most boards expect, and invisible if you report the $420 gross figure.

Deductions brands routinely miss

• •Reverse logistics and refurbishment on returned units
• •Discount value delivered through sitewide promotions rather than codes
• •Marketplace and platform commission on the same units
• •Cost of gift-with-purchase and free shipping thresholds
• •Fraud and chargeback losses

Checklist

• •Cohort by first-purchase month, never blended
• •Fixed horizons at 90/180/365 days
• •Returns netted against the original order month
• •Fully loaded CAC includes agency, creative, and tooling
• •Definition recorded in the KPI dictionary and approved by finance

PMC Perspective

PMC Thinkers builds the contribution CLTV model with the client''s finance team during the diagnostic and then contracts its fee against movement in that number for fashion, beauty, and lifestyle brands at $5M–$25M.

FAQ

Should overheads be included? No — CLTV is a contribution measure. Overheads belong below the contribution line.

Why 365 days? It captures the second and third purchase in most fashion categories without relying on projection.