A Magento to Shopify Plus migration takes 12 weeks for a mid-market merchant with 5,000–25,000 SKUs, a single storefront, and a standard Magento 2 extension stack. That timeline holds when discovery front-loads three things most teams underestimate: schema reconciliation, the redirect map, and data parity testing.
This is not a CSV export. Re-platforming from Adobe Commerce touches your EAV-modeled catalog, your URL graph, your tax and tier-pricing logic, your order history, your customer accounts, your subscription bindings, and every third-party integration that has ever talked to your instance. When timelines slip, the cause is almost never engineering speed. It is a discovery phase that mistook a feature inventory for an actual plan.
How Long Does a Magento to Shopify Plus Migration Really Take?
For a mid-market merchant, roughly 5,000–25,000 SKUs, a single storefront, two to three locales, and a standard Magento 2 extension stack, 12 weeks is a realistic working timeline from kickoff to launch. Larger catalogs, multi-storefront setups, or B2B accounts with negotiated price lists routinely run 16–20 weeks. The 12-week shape is the same; the phases stretch.
The structure that holds: roughly four weeks of discovery and architecture, six weeks of implementation and integration, and two weeks of pre-launch validation and cutover. The split that fails is anything that puts data migration before the redirect map.
Week-By-Week: The Phases That Actually Hold
Weeks 1–2: Discovery, Catalog Audit, and Schema Mapping
Discovery is where 12-week timelines either become 12-week deliveries or 22-week scrambles. The work is unglamorous and non-negotiable.
We pull a full export of the Magento 2 catalog: products, configurable parent-child relationships, custom attribute sets, attribute groups, tier prices, and category trees. Adobe Commerce's EAV schema means a single product can have attribute values scattered across a dozen tables, and the export must flatten that without losing custom attribute fidelity.
In parallel, we crawl the live site and capture the full URL inventory. Every product URL, every category URL, every CMS page, every blog post, every static asset that has earned a backlink. This becomes the canonical input for the redirect map covered in Week 4. Discovery also includes a full integration inventory: every ERP, OMS, PIM, 3PL, payment processor, tax engine, email platform, review platform, and analytics tag that touches the store.
Output: a catalog reconciliation document, a URL inventory, an integration matrix, and a written architecture decision record covering how Shopify Plus will model what Magento modeled, including the parts that do not map one-to-one. Our eCommerce platform migrations overview describes the shape of these documents in more detail.
Weeks 2–3: Theme and Component Architecture
Architecture work runs in parallel with the late discovery phase. The team building the new theme, whether Online Store 2.0 with Liquid sections or a Hydrogen storefront on Oxygen, needs the design system locked before product detail templates are touched. Hydrogen brings React, GraphQL, and the Customer Account API into the picture and is a different decision tree than a Liquid theme; we cover those tradeoffs in our Shopify Plus agency practice.
The architecture deliverable also includes a Shopify Functions inventory. Magento's checkout-rule logic, covering discounts, shipping rules, and payment customizations, usually requires one or more Functions (Cart and Checkout Validation, Discounts, Delivery Customizations, Payment Customizations) to replicate. Identifying which Functions are needed in Week 2 prevents a Week 9 panic when QA discovers that a tiered shipping discount was assumed to be a native Shopify Plus feature.
Week 4: Redirect Map and Migration SEO Plan
This is the week that protects your organic traffic. Every legacy URL gets mapped to a destination URL on the new store. Where the destination differs, a 301 redirect is documented. Where the destination is identical, canonical continuity is verified. Shopify's automatic canonical tag does not absolve you of validating that hreflang, structured data, and internal link graphs align with the legacy state.
The redirect map is also where you decide what not to bring forward. Thin category pages with no rankings and no inbound links should not be redirected; they should 410. Old promotional landing pages from campaigns no longer running do not need to live on as redirect noise. Discipline here keeps the redirect file maintainable.
Our migration SEO methodology walks through the exact validation steps: redirect chain testing, index coverage monitoring, schema-graph parity checks, and the indexer scheduling that nudges Googlebot and Bingbot toward the new URLs in the first 72 hours after cutover.
Weeks 5–6: Catalog and Customer Data Migration (Staging)
With the schema map locked, data migration runs into a staging environment first, never directly into production. Products, variants, metafields, collections, customer accounts, and order history all migrate with full parity checks against the Magento export. Tier pricing and B2B price lists migrate into Shopify Plus B2B catalogs or price lists; tax overrides migrate to tax overrides; product bundles map to Shopify bundles, to an app, or to a clarified merchandising approach if neither fits.
Order history is the part that surprises teams. Shopify accepts historical order imports, but fidelity drops fast for orders older than two years. Line-item tax breakdowns, applied discounts, and fulfillment events do not always round-trip cleanly. The practical approach is to migrate the recent window in full and archive older history in a read-only export accessible to support staff.
Weeks 6–8: Integrations, Functions, and Storefront Build
The Liquid or Hydrogen build proceeds against staging data. Every integration in the Week 1 matrix gets reconnected: ERP via middleware or a native connector, PIM via metafield sync, 3PL via Shopify Flow or a direct API integration, tax engine (Avalara, TaxJar, or Vertex), and the review and email platforms.
Shopify Functions get written and tested against representative cart scenarios. Markets configuration is locked for any merchant with international storefronts, covering pricing, language, domain, payment method, and shipping rules per Market. B2B Edition customers configure company profiles, location-based catalogs, payment terms, and quote flows during this window.
Weeks 9–10: QA, UAT, and Migration SEO Validation
QA runs against the full staging environment with production-equivalent data. Test plans cover checkout (every payment method, every shipping zone, every promotion type), customer account flows (login, password reset, address book, order history), B2B flows where applicable, and the integration boundary for every connector. UAT runs in parallel with the merchant's team: merchandisers placing test orders, customer service walking through return scenarios, finance reconciling order data against the ERP.
Migration SEO validation runs simultaneously. The redirect file is loaded into staging, every entry is tested for a clean 301, schema is validated with Google's Rich Results Test and Schema.org validators, and a final crawl confirms that the new site's internal linking does not orphan any page that was internally linked on the legacy site.
Week 11: Pre-Launch Hardening and Dress Rehearsal
The dress rehearsal is a full cutover simulation in a controlled window. The team executes the launch runbook end-to-end against staging, times every step, identifies anything requiring manual intervention, and assigns a named owner to each step. The output is a launch runbook with no ambiguous lines.
This is also the week to lock the freeze window: the period when merchandisers cannot edit the legacy site because changes would be lost in the final data sync. Most merchants need a 24–48 hour freeze, sometimes longer for high-velocity catalogs.
Week 12: Cutover, Indexer Scheduling, and Day-One Support
Cutover happens on the agreed window. The final delta migration runs (orders and customer accounts created during the freeze), DNS flips, redirects go live, and indexer scheduling kicks in. XML sitemaps are submitted to Google Search Console and Bing Webmaster Tools, the legacy sitemap stays live for a defined window so crawlers can discover the redirects, and monitoring spins up to watch index coverage and Core Web Vitals.
Day-one support is a hands-on shift. The migration team stays on call for the 72-hour window when most issues surface, typically integration edge cases, niche checkout configurations, and occasional customer-account login issues.
Magento to Shopify Plus Migration FAQ
Can the timeline compress below 12 weeks?
Sometimes. A small catalog (under 1,000 SKUs), no B2B requirements, a Liquid theme rather than Hydrogen, and a clean integration matrix can compress to 8–10 weeks. The compressible weeks are usually the storefront build and the QA buffer. Discovery, the redirect map, and data migration do not compress safely. Every week cut from those is a week paid back during launch.
What is the riskiest week?
Week 4. The redirect map, if done poorly, costs organic traffic for months and is the hardest thing to fix after the fact. A bad theme can be re-themed. A bad redirect file is a 90-day rankings drop.
Does this timeline apply to B2B migrations?
The same 12-week shape applies, but the discovery and data migration phases stretch. Company profiles, location-based catalogs, payment terms, and quote workflows in Shopify Plus B2B Edition each require their own architectural decisions. Merchants weighing Shopify Plus against BigCommerce for B2B should read our BigCommerce vs Shopify for B2B comparison before locking the destination platform.
What happens to Magento-specific features that Shopify Plus does not match natively?
They get redesigned, replaced, or removed. Multi-source inventory maps to Shopify locations with some loss of complexity. Customer-group-specific catalogs map to B2B price lists. Layered navigation maps to filtered collection pages or a third-party app. Some Magento extensions have no Shopify equivalent, and the workflow they enabled needs a fresh design. This is part of why discovery matters.
Planning Your Migration
If you are scoping a Magento to Shopify Plus migration, the first conversation should be about the catalog, the URL inventory, and the integration matrix, not the launch date. We run these projects with a fixed-fee discovery engagement that produces the architecture document, the redirect map, and a realistic timeline before any code is written.
Our Magento to Shopify Plus migration practice and our Shopify migration services team have run this play across mid-market and enterprise merchants. To talk through your specific catalog and timeline, start a conversation with our team.