Magento to Shopify Migration: A Checklist for Stores With 10,000+ SKUs

Migrating from Magento to Shopify is one of the most common platform moves in ecommerce today, and for good reason. Magento gives merchants flexibility, but that flexibility comes with a real cost in hosting, development, and ongoing maintenance, especially for stores with very large catalogs. Shopify, particularly Shopify Plus, offers a more manageable path for large catalog merchants, but only if the migration itself is planned properly.

At 10,000 SKUs and above, this is not a project you want to approach casually. Here is a practical checklist covering what actually needs attention before, during, and after the move.

Before Migration: Planning and Audit

Full product data audit Before moving anything, export and review your complete Magento product catalog. At this scale, there are almost always inconsistencies built up over years, duplicate SKUs, discontinued products still marked active, inconsistent categorization, and missing or outdated attributes. Cleaning this up before migration is far more efficient than migrating the mess and cleaning it up afterward on a new platform.

Custom attribute mapping Magento’s flexible attribute system often does not map one to one with Shopify’s structure. Decide in advance how custom attributes, configurable product options, and custom fields will translate into Shopify’s product, variant, and metafield structure.

Extension and customization inventory List every Magento extension currently in use and map each one to its Shopify equivalent, whether that is a native Shopify feature, an app, or something requiring custom development. This is where scope often expands, because Magento extensions frequently bundle multiple functions that need separate solutions on Shopify.

Shopify Plus evaluation For catalogs at this scale, standard Shopify plans often are not the right fit due to product limits, checkout customization needs, and API rate limits. Evaluate whether Shopify Plus is necessary based on your SKU count, traffic volume, and B2B or wholesale requirements.

SEO baseline documentation Document current rankings, organic traffic by page, backlink profile, and the full current URL structure. This becomes essential input for the redirect strategy discussed below.

During Migration: Data and Structure

Product and variant migration Map Magento’s configurable products and simple products correctly to Shopify’s product and variant model. This is one of the most technically tricky parts of a Magento migration, since the two platforms structure variants quite differently.

Category to collection mapping Magento’s category structure needs to be thoughtfully rebuilt as Shopify collections, ideally preserving the logical hierarchy customers and search engines already understand, rather than a literal one to one dump that does not fit Shopify’s collection logic well.

Customer data and order history Decide what customer data and historical order information needs to migrate, and confirm the approach for preserving customer accounts so returning customers do not need to register again.

Redirect mapping at scale Every Magento product, category, and CMS page URL that carries SEO value needs a mapped 301 redirect to its Shopify equivalent. At 10,000 plus SKUs, this typically means thousands of individual redirect rules, which is a significant but essential undertaking.

Metadata migration Title tags, meta descriptions, and image alt text need to be mapped and migrated systematically, not left to populate with Shopify defaults.

Multi store and multi currency considerations If your Magento setup runs multiple storefronts, languages, or currencies, plan how this maps to Shopify Plus’s expansion store or markets functionality, since this is structurally different from how Magento handles multi store setups.

Testing Before Launch

Staging environment review Test the fully migrated store on a staging environment before going live, checking product data accuracy, images, pricing, variant selection, and checkout flow across a representative sample of products, not just a handful of best sellers.

Search and filter functionality Large catalogs depend heavily on functional search and filtering. Verify this works correctly with the full migrated catalog, not just a small test dataset, since performance and relevance issues often only appear at full scale.

Third party integrations Confirm that ERP, inventory management, shipping, and payment gateway integrations are working correctly against the new Shopify environment before launch, not discovered as broken on launch day.

Performance testing under real catalog size A store that performs well with 500 test products can behave very differently with the full 10,000 plus SKU catalog loaded. Test page speed and collection page load times with the actual full catalog in place.

Launch and Post Migration

Coordinated cutover Plan the actual switchover carefully, including a content freeze window on Magento before the final data sync, to avoid orders or updates being lost between the last export and go live.

Immediate redirect verification Once live, spot check a large sample of redirects across product, category, and CMS pages to confirm they are firing correctly, not just relying on the assumption that the bulk redirect upload worked.

Sitemap resubmission Submit new XML sitemaps to Google Search Console immediately after launch to help search engines discover and reindex the new URL structure faster.

Close monitoring period Track organic traffic, rankings for priority keywords, crawl stats, and conversion rate daily for at least the first month, since this is when migration issues, if any exist, typically surface.

Why This Scale of Migration Needs a Specialist Team

A Magento to Shopify migration at 10,000 plus SKUs is not a project that fits a generic migration tool or a checklist alone. It needs a team that understands both platforms’ underlying data structures deeply enough to catch the mapping issues that only show up at real scale, not in a small test migration.

Cart Potato is a Shopify Plus agency in India with hands on experience migrating large, complex catalogs from Magento to Shopify, handling data mapping, SEO protection, and Shopify Plus setup as a single coordinated project rather than separate disconnected workstreams.

If you are planning a Magento to Shopify migration for a large catalog, talk to Cart Potato early in the planning process, the biggest risks in a migration like this are almost always decided in the planning stage, not during the technical build.