Platform migrations can get mired in unexpected difficulties much more than they should, and rarely for technical reasons. The most common causes are inadequate scoping, underestimated data complexity, and a mismatch between what the new platform can do out of the box and what the business actually needs. A well-prepared Magento Open Source migration is a different project entirely from one that begins without proper groundwork.
This guide covers the preparation work that separates successful migrations from costly, drawn-out ones.
Why Businesses Migrate to Magento Open Source
The most common trigger is outgrowing a hosted platform. Shopify, WooCommerce, and similar solutions serve their purpose well at lower order volumes, but they impose constraints that become increasingly expensive to work around as a business scales. Catalogue limitations, restricted checkout customisation, third-party integration complexity, and the inability to own and control customer data are the friction points that most frequently bring businesses to Magento.
Other common drivers include the need for genuine B2B functionality, multi-currency or multisite capability, or a desire to move away from ongoing licence costs towards an open-source solution where the business owns the codebase outright.
The Discovery Phase Is Not Optional
Before any development begins, a thorough discovery phase is essential. This means mapping every integration the current platform has with external systems: ERP, CRM, fulfilment, marketplaces, payment providers, loyalty programmes, and anything else that touches the e-commerce operation. Each of these will need to be rebuilt or replaced on Magento, and understanding the complexity of each integration early is what allows an accurate project scope to be produced.
Discovery should also cover the current platform’s customisations. Bespoke checkout flows, custom pricing rules, unusual product types, and non-standard fulfilment logic all increase migration complexity significantly. A feature built once on the old platform may require a Magento extension, a custom module, or a completely different approach on the new one.
Data Migration: The Most Underestimated Element
Product data, customer records, and order history are the three data sets that matter most in any migration, and each presents its own challenges.
Product data is rarely as clean as it appears. Attribute inconsistencies, missing images, duplicate SKUs, and category structures that do not map neatly to Magento’s attribute set system are common problems that only become visible when migration is attempted. A data audit before migration begins, not during it, is the right approach.
Customer records require careful handling under UK GDPR. Migrating customer passwords from most platforms is not straightforward, as hashing algorithms differ between systems. This means customers will typically need to reset passwords on first login to the new store, and that needs to be communicated clearly as part of the launch plan.
Order history is important for customer service and reporting, but it is worth deciding early how far back to migrate. Moving ten years of order history adds significant complexity. A practical approach is often to migrate the last two to three years of live data and archive older records separately.
SEO Continuity
A platform migration that loses organic search rankings is a commercial setback that can take months to recover from. SEO continuity requires a complete URL mapping exercise before launch: every URL on the current site needs either a direct equivalent on the new Magento installation, or a permanent 301 redirect to the most relevant replacement page.
Meta titles, descriptions, canonical tags, structured data, and XML sitemaps all need to be configured correctly before the domain is pointed. Google Search Console should be monitored closely in the weeks after launch to catch any crawl errors or indexing issues early.
Timing the Launch
A Magento migration should never go live in the weeks immediately before a peak trading period. The stabilisation time needed after launch, covering edge cases, performance monitoring, and handling unexpected integration failures, means a buffer of at least six to eight weeks before peak is advisable.
Launches in the run-up to Black Friday or the Christmas trading period are a recurring source of expensive emergencies. If peak trading is approaching, the better decision is usually to delay rather than rush.
Choosing the Right Migration Partner
A Magento migration is not a project to hand to a generalist development agency with limited platform experience. The technical complexity of a well-executed migration covers data migration, integration rebuilds, performance configuration, and SEO continuity, and requires an agency with genuine Magento depth.
There are several questions worth asking any agency before appointing (see choosing a Magento development agency). Platform experience, discovery process, and post-launch support structure are three key areas that most reliably distinguish a credible migration partner from one that will learn on the client’s budget.
Accentika has delivered Magento Open Source migrations for UK businesses across retail, wholesale, and distribution. Talk to the team about your migration requirements.
