Shopify's own migration guidance is refreshingly direct about this: any time URLs change, there's some effect on SEO traffic. That's not a reason to avoid migrating. It's a reason to know exactly which handful of predictable, avoidable mistakes turn a normal short-term dip into a lasting loss.
What Actually Breaks #1: Redirects
This is the big one, and it's rarely that redirects are missing entirely. It's that the redirect map is incomplete: it covers products, because those feel obvious, and quietly forgets blog posts, category pages, or filtered and tagged URLs that carried real ranking value on the old platform. Every one of those becomes a 404, and the ranking signal that URL had built simply doesn't transfer anywhere.
The only reliable fix is a full crawl of the old site before anything moves, producing a complete URL inventory to map against Shopify's own structure (/products/, /collections/, /blogs/), which rarely matches whatever URL pattern the old platform used by default. And avoid what's sometimes called homepage dumping: funneling many old URLs into a single page, usually the homepage, when there's no genuine equivalent. Google expects a redirect to preserve intent, not just avoid a 404, and a redirect set that dumps everything into one page gets treated as a weak signal across the board, not a shortcut around doing the mapping properly.
What Actually Breaks #2: Metadata
Title tags, meta descriptions, H1s and image alt text often get silently regenerated by whatever new theme you land on, replacing carefully tuned, ranking-tested copy with generic defaults. Losing this is one of the most common and most avoidable parts of a migration, precisely because it's invisible until rankings shift weeks later. Export the old site's metadata before migrating and compare it against what actually lands on the new pages, rather than assuming it carried over.
What Actually Breaks #3: Site Structure and Orphaned Pages
A migration is also usually when someone decides to "clean up" the navigation. If the old site linked to every collection from the main menu and the new one uses a more streamlined structure, pages that lose their internal links become orphaned, unreachable by clicking through the site, and that hurts both crawlability and the ranking equity those pages had. A structural change made for a good reason can still quietly cost you pages you didn't mean to lose.
What Actually Breaks #4: Everything an App Used to Handle
Product reviews, structured data, loyalty points, subscription logic, anything that lived inside the old platform's plugin or app ecosystem doesn't migrate on its own. It needs a specific import step, an app-to-app data transfer, or in some cases, rebuilding the functionality natively on Shopify (see our guide on when custom development is actually the right call, since some of what breaks here is a sign the business had outgrown simple platform-to-platform migration in the first place). Assuming reviews and structured data will "just come along" is one of the more common gaps in a migration plan, and one of the more damaging ones, since reviews in particular are exactly the kind of trust signal both search engines and AI systems now weigh heavily.
The Realistic Timeline
Shopify's own guidance frames the likely revenue impact as roughly: the share of your traffic that comes from SEO, multiplied by the share of that traffic that's non-branded, multiplied by 15-30%. For a mid-sized store, that typically works out to a low single-digit percentage of revenue, recoverable within one to three months when the migration is planned properly. Larger, more complex sites can take longer, but a full, permanent loss isn't the normal outcome of a well-executed move. It's specifically the outcome of skipping the steps above.
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Get Your Visibility Audit →Frequently Asked Questions
Will migrating to Shopify hurt my SEO rankings?
Some short-term impact is normal, Shopify's own migration guidance is direct about this: any time URLs change, there's some effect on SEO traffic. The difference between a temporary dip and a lasting loss comes down entirely to how completely redirects, metadata and site structure are carried over, not the migration itself.
How long does it take to recover SEO traffic after migrating to Shopify?
Per Shopify's own guidance, a well-executed migration typically recovers within a few weeks for a small site and a few months for a larger one. Shopify frames the realistic revenue impact as roughly (% of traffic from SEO) x (% of that traffic that's non-branded) x 15-30%, recoverable within 1-3 months for a mid-sized site when the migration is planned properly.
What's the most common mistake when migrating to Shopify?
An incomplete redirect map. It's rarely that redirects are missing entirely, it's that they cover products but forget blog posts, collections, or filtered and tagged URLs that quietly carried real ranking value on the old platform. A full crawl of the old site before migration is the only reliable way to catch all of them.
Do product reviews transfer when migrating to Shopify?
Not automatically. Reviews, along with structured data and other functionality that lived inside an old platform's plugins or apps, typically need a dedicated migration step or app-specific import. Assuming they'll carry over on their own is one of the more common gaps in a migration plan.
Should I redirect every old URL to Shopify's new URL structure?
Every old URL that has any traffic, backlinks or ranking history needs a specific redirect to its closest genuine equivalent, not a blanket redirect to the homepage. Funneling many old URLs into one page (homepage dumping) is one of the fastest ways to lose the ranking signal a redirect is supposed to preserve.
Related reading: Shopify vs. Custom Website Development