The Magento Migration Checklist: What to Do Before, During, and After You Replatform

Commerce teams typically start the conversation in the wrong place when they discuss leaving Magento. Agency shortlists, licensing cost spreadsheets, and platform comparison. Eventually, all of them are beneficial.

However, the first question that truly decides whether a migration is successful or unsuccessful is easier to answer: Do you completely understand what you're working with right now?

Magento stores accumulate complexity over the years. Custom extensions, bespoke database tables, homegrown integrations, and SEO structures built on top of aging URL logic. None of that is visible in a platform demo. And if you don't surface it before you start moving, you will find it mid-project, when it costs three times as much to fix.

The migration is broken down into five parts in this guide: what to audit, how to map your data, how to test before anything goes live, how to execute cutover without disrupting revenue, and what is truly needed in the first 30 days after launch. You will have addressed the choices that the majority of replatforms make incorrectly if you go through each one in order.

Start With a Complete Audit of What You Are Running

⁠Before a destination platform is chosen, before a scope document is written, you need an honest inventory of your current Magento instance.That means cataloging every active extension and identifying which ones have no equivalent on your target platform. It means documenting every custom module, every modification made to Magento core files, and every third-party API integration currently running in production. ERP, PIM, OMS, payment gateways, marketing automation, analytics, loyalty programs. Map them all and note the direction of data flow for each.

The data audit runs alongside the technical audit. Prior to migration, it is essential to compile inventories of products, customers, orders, CMS content, and promotional strategies. This is also the moment to clean the dataset. Duplicate customer records, inactive SKUs, corrupted order history, orphaned media assets: these are small problems individually and compounding ones if you carry them forward. Cleaning at source cuts down on transformation time, reduces QA cycles, and reduces the number of post-launch support tickets you will spend the first week resolving.

SEO structure gets its own audit pass. Crawl and export every URL on the current store, record your Core Web Vitals baseline, document canonical tags and metadata across your top-performing pages, and capture your XML sitemap structure. Every one of these will need to be verified after migration. Without the baseline, you will not know if something broke.Finally, secure stakeholder alignment before any project work begins. Define internal owners for data, development, QA, and content. Confirm the go-live window. Identify blackout periods around peak trading seasons, major promotions, or fiscal close. Then get executive sign-off on scope, timeline, and budget. Scope changes mid-project are the most common reason migrations run over.

Map Your Data to Your Destination Platform's Architecture

Every platform structures data differently. The product model that works in Magento does not translate directly to any of the platforms merchants typically move to. That means every data object needs to be mapped: translated from the source schema into the format the destination platform expects.

Product hierarchies, variant logic, and attribute sets need to be restructured to align with the new platform's product model. Customer records, including account IDs, order histories, and any stored metafields, need to be reformatted. Order data, including statuses, payment references, and fulfillment records, typically requires transformation to align with the new system's APIs.

Good mapping documentation prevents surprises during import. The document should define how it transforms, how null values are handled, how date formats are converted, and how nested relationships, such as product-to-image or order-to-customer links, are maintained during the migration. Teams that skip this step usually discover the gaps during QA, when fixing them requires going back to the mapping exercise anyway, under time pressure.

For B2B merchants, this phase requires extra attention. Customer group assignments, account-level pricing, quote workflows, and approval hierarchies often exist as Magento customizations with no direct equivalent elsewhere. Deciding how to handle them is a mapping decision, not a development decision, and it needs to be made before anyone writes a line of code.

Validate Everything in a Staging Environment Before You Move Production Data

Once mapping rules are defined, testing begins in a controlled environment with a representative subset, typically one to five percent of production data, run through the migration pipeline first.The validation pass checks four things: Relational integrity: Product-to-image links, order-to-customer relationships, category assignments, and tag inheritance must remain intact through the transformation. Field accuracy: Values that should be 12 characters should not arrive truncated at 10. Date fields formatted for one system should not display incorrectly in another. Business logic: Promotional rules, discount stacking, cart price rules, and coupon codes need to execute correctly on the new platform. Integration behavior: Reconnected systems, ERP sync, payment gateway flows, and marketing automation triggers need to be tested end-to-end in staging before any traffic is involved.

Automated QA scripts cover a significant portion of this validation. They are not a substitute for manual review by the people who know the data: merchandisers checking that product variants render correctly, finance reviewing that order history looks right, operations confirming that fulfillment logic works as expected.

Execute Cutover in Phases

A phased migration reduces risk at every stage, whereas a single large data import followed by an immediate cutover creates a single point of failure with no recovery path if something goes wrong at scale. A structured migration typically runs in this sequence:

Static data first: Products, collections, CMS content, and navigation structures. These are the lowest-risk records, with the least transactional dependency.

Transactional data second: Customer accounts and order history carry the highest compliance and operational risks, so they are moved after static data has been validated.

Delta sync at cutover: Every order placed and every customer account created between your initial export and go-live must be captured. A delta sync ensures that nothing falls through the cracks between the two systems.

Running parallel systems briefly during this period is not inefficient. It enables your team to confirm that the new store is transacting correctly before decommissioning the old one. Once you are satisfied that production traffic is flowing cleanly through the new platform, the legacy system can be shut down.

DNS cutover should happen during the lowest-traffic window available, typically a weekday night. Have your rollback plan documented and your team on standby. Confirm SSL is active on the new domain, verify that CDN caching is configured correctly, and place test orders immediately after cutover to validate the full purchase flow in production.

Post-Launch is not the Finish Line

Go-live is not the end of the migration. It is the beginning of a stabilization period that typically runs for 30 days.

In the first two weeks, monitor Core Web Vitals daily. Track organic search rankings for your top-performing pages and investigate any drops immediately. 301 redirects that looked correct in staging sometimes surface gaps in production; your 404 report is the fastest way to find them. Watch abandoned cart rates for signals that checkout is introducing new friction.

Verify that all connected integrations remain stable under real production load. Beyond the technical metrics, pay attention to your customer support ticket themes in the first week. Support tickets are real-time user research. They surface friction that automated monitoring does not catch: a filter that works on a desktop but breaks on a specific mobile browser, a discount code that applies correctly in testing but fails under a specific cart configuration, and a password reset email that ends up in spam.

The final validation step is reconciliation. Confirm that the record counts that left your Magento instance, products, customers, and orders, match the counts that arrived in your new platform. Verify the accuracy of inventory levels, pricing, and tax rules. Compare reporting outputs between systems before you decommission access to the legacy data. Once everything is reconciled and day-to-day operations, order fulfillment, refunds, and stock updates are running cleanly on the new data set, the migration is complete.

Migration is a Translation Exercise

Leaving Magento is not just a technical event. It is a translation between two systems, two data architectures, and often years of accumulated decisions made by people who may no longer be on the team. Done with rigor, it lays the foundation for a commerce operation that is faster, cheaper to run, and ready for what comes next.

Solvative delivers a fixed-scope migration assessment in 7 days. We map your current Magento instance, identify the right destination platform for your business, and scope the project with full cost transparency.

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