Twelve brand sales. $340M in combined GMV at exit. Every single one had a buyer who said the same thing in diligence: “We’ll just shift the demand to Shopify.”
None of them did. Not cleanly. Not on the timeline they modeled. Not at the gross margin they pitched the LP base.
We sat on the seller side of nine of those deals and the buyer side of three. Here’s what the data actually says about Amazon-to-Shopify migration economics, and why most acquirers are pricing the channel risk wrong by a factor of two.
The 38% rule nobody puts in the LOI
Across the 12 deals, average post-migration Amazon revenue retention at month 12 was 38%. Not 80. Not 60. Thirty-eight percent of pre-deal Amazon GMV survived the first year when the new owner pulled spend, neglected the catalog, or actively redirected demand to a Shopify storefront.
The buyers modeled 65% retention on average. The spread between modeled and actual retention destroyed roughly $14M of enterprise value across the portfolio at a 4x EBITDA multiple. That is not a rounding error. That is the entire deal thesis on three of the twelve.
Here is why the gap exists. Amazon ranking decay is not linear. When you cut PPC by 40%, organic rank drops, sessions drop, conversion drops, BSR drops, and the algorithm reads all four signals as evidence the listing should be deprioritized. The next round of cuts compounds against an already-weakened listing. By month four you are not running a discount Amazon program, you are running a dying one.
The Shopify side of the migration almost always underdelivers in parallel. New traffic acquisition costs on Meta and Google are not what they were in 2021. CAC payback on a $40 AOV CPG product through paid social is now routinely 7-9 months for new brands. The “we’ll just shift the spend” thesis assumes a CAC that does not exist anymore.
What the 38% looked like, decomposed
We pulled the post-close data on all twelve and decomposed the surviving Amazon revenue. The pattern was consistent.
About 60% of the survival came from existing repeat buyers, Subscribe & Save, branded search, customers who already knew the SKU. About 25% came from category-level branded search where the buyer had not yet been displaced. The remaining 15% came from a long tail of legacy ranking on hero ASINs that the new owner had not actively neutered.
Translation: the surviving Amazon business was almost entirely brand equity the seller built. None of it was incremental work the new owner did. That matters because the brand equity decays. Subscribe & Save churns ~4% per month with no PPC defense behind it. Branded search erodes when you stop running Sponsored Brand video. By month 18, the 38% retention drops to ~22% in the cases we tracked that long.
So the right number for buyer modeling is not “65% retention with steady decline.” It is “38% at month 12, 22% at month 18, asymptote at single digits unless you reinvest.” The DCF on that channel looks completely different.
The three migration archetypes, and only one works
Of the 12 deals, we saw three distinct migration playbooks. The outcomes were not close.
Archetype 1: The clean cut. Buyer turns off Amazon spend within 90 days, redirects all marketing to Shopify, treats Amazon as residual revenue. Five of the twelve. Average year-one Amazon retention: 31%. Average year-one Shopify revenue as % of pre-deal Amazon GMV: 18%. Combined channel revenue at month 12: 49% of pre-deal. Catastrophic.
Archetype 2: The dual-channel hold. Buyer keeps Amazon program intact, runs Shopify in parallel, lets Shopify cannibalize naturally. Four of the twelve. Average year-one Amazon retention: 71%. Shopify as % of pre-deal Amazon: 22%. Combined: 93%. Boring, expensive in headcount, but the only one that holds enterprise value.
Archetype 3: The forced migration. Buyer aggressively redirects existing customers to Shopify via packaging inserts, email capture, post-purchase flows. Three of the twelve. Average year-one Amazon retention: 42%. Shopify: 31%. Combined: 73%. Better than Archetype 1 but still well below the underwrite case.
The Archetype 2 buyers, the ones who refused to “migrate” and instead just added Shopify as a parallel channel, were the only ones who hit their three-year hold IRR target. Every buyer who treated Amazon as a millstone to escape destroyed value.
The reverse migration nobody talks about
Here is the part that does not fit the Shopify-pilled investor narrative. Three of the twelve brands ended up running a reverse migration in years two and three, pulling Shopify spend back and reinvesting in Amazon. In all three cases this was the move that saved the deal.
Why? Because Amazon’s CAC, even at a 35% TACoS, was lower than blended Shopify CAC at the same revenue scale once you accounted for the full cost stack: Klaviyo, Shopify Plus, Shopify apps, 3PL margin compression, paid social, paid search, CRO contractors, and headcount to run the store.
Two of those three brands are now running Amazon as their dominant channel again, with Shopify as the brand-experience storefront and the SKUs that don’t make economic sense on Amazon. The migration economics, in other words, run both directions, and the right answer is almost always “both channels, run by people who actually know how to run both,” not “migrate.”
If you are sequencing a channel transition without giving up FBA velocity, our 90-day FBA-to-FBM-plus-3PL plan covers the operational handoff in detail. The principle is the same: parallel runways, no clean cuts.
What this means if you are buying or selling
If you are selling: do not let a buyer underwrite 60%+ Amazon retention without a contractual reinvestment minimum. The retention number is fiction unless the buyer commits to maintaining PPC spend at ≥80% of trailing twelve-month average for at least 12 months post-close. Put it in the purchase agreement. The earnout will be worth twice as much.
If you are buying: model 40% retention, not 65%. If the deal does not pencil at 40%, you are paying too much. And if your post-close plan is “migrate to Shopify and turn down Amazon spend,” reread the Archetype 1 numbers above. You are about to overpay for a channel you are about to break.
The brands that survive these transitions are the ones run by operators who treat Amazon and Shopify as two different businesses with two different customer bases, two different cost structures, and two different growth equations. The ones that fail are run by people who treat Amazon as the past and Shopify as the future. There is no past channel that throws off 40% gross margin at $20M GMV. There is only the channel you understand and the channel you don’t.
Want a diligence-grade read on your own Amazon program before you sign an LOI? Book a 30-minute audit call. We’ll tell you what your retention number actually is.