Migrating to Shopify in 2026: The Complete Guide for WooCommerce, BigCommerce, and Square Merchants

There is a version of this decision that gets made too fast, and a version that gets made too late. Merchants who rush it often lose organic rankings they spent years building. Merchants who delay it keep patching a platform that is quietly costing them more every quarter in maintenance, plugin conflicts, and developer hours that should be going toward growth instead.

This guide is for neither extreme. It is for merchants who want to understand exactly what a Shopify migration involves before committing to one — what moves cleanly, what requires real work, where the SEO risk actually lives, and what a realistic timeline looks like for a store of their size.

We have run more than 30 major platform migrations at Shugert since 2016. Some of the largest involved over 10,000 SKUs. Some were completed in under eight weeks without losing a single point of meaningful organic traffic. The numbers in this guide come from that work, not from industry averages.

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Before We Talk Process: A Word on Urgency

We turn down migrations. Not many, but enough that it is worth saying plainly.

When a merchant comes to us and the word "urgent" appears in the first message, we pay attention to what that word is covering. Sometimes it means there is a legitimate deadline — a contract expiring, a platform announcement, a business event with a real date attached. That is fine. We can work with deadlines.

What we cannot do, and will not do, is compress a migration timeline by skipping the testing phase. We have seen what happens when that choice gets made. Rankings drop and take months to recover. Product data arrives in the new store corrupted or incomplete. Checkout breaks on mobile three days after launch. These are not edge cases. They are predictable outcomes of rushing a process that requires sequential validation at each step.

If you are looking for an agency that will move fast by cutting corners, we are not the right fit. If you want a migration that holds up six months after launch, keep reading.

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Why 2026 Is a Particularly Good Moment to Migrate

The platform gap between Shopify and its alternatives is wider now than at any point in the past decade. Shopify crossed $100 billion in quarterly GMV in Q1 2026 and holds approximately 30% of the US ecommerce platform market. That scale matters not because of the number itself, but because of what it produces: a developer ecosystem, an app marketplace, and an AI infrastructure that no alternative platform can currently match.

Agentic Storefronts are now live for all Shopify merchants. Your products are discoverable inside ChatGPT, Microsoft Copilot, Google AI Mode, and Perplexity with one setup in your admin. WooCommerce merchants can build their own integrations. BigCommerce merchants have limited native access. Square Online merchants have none.

Shopify's Winter '26 Edition also brought a meaningfully upgraded Sidekick — an AI assistant that can now analyze store performance, suggest actions, and execute changes with merchant approval. And B2B features, previously locked to Shopify Plus, opened to all paid plans in April 2026.

None of this means every merchant should migrate immediately. But if you have been waiting for the platform to justify the disruption cost, 2026 is a credible answer to that question.

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WooCommerce to Shopify Migration

Why WooCommerce Merchants Switch

WooCommerce is not a bad platform. For a store in its early stages, with a developer who knows WordPress deeply and a catalog that does not require complex variant logic, it works. The problem is what it becomes at scale.

By the time most merchants consider migrating, they have accumulated between 20 and 40 plugins keeping the store functional. Each one needs updating. Each update risks breaking something else. The hosting bill is a separate conversation. Security patches are a separate conversation. Database performance during high-traffic events is a separate conversation. At some point the cumulative overhead of keeping WooCommerce running cleanly becomes a meaningful drag on the business — time and money that is not going toward product, marketing, or customer experience.

Shopify absorbs all of that. Hosting, security, uptime, PCI compliance — it is included in the platform fee. Shopify guarantees 99.99% uptime across its infrastructure. That is not something a shared hosting plan with WooCommerce can promise you on Black Friday.

What Moves and What Does Not

Products transfer cleanly: titles, descriptions, variants, pricing, images, inventory levels, SKUs, metafields. Customer records move: names, emails, addresses, order history, account status. Blog posts and static pages can migrate, though Shopify's blog engine is simpler than WordPress — categories and advanced taxonomies do not carry over directly, and shortcodes do not exist in Shopify's Liquid templating system.

What requires real work: URL structure. WooCommerce uses /product/item-name/. Shopify uses /products/item-name/. Every single URL changes, which means every single URL needs a 301 redirect to preserve SEO authority. This is not optional and it is not a quick task on a large catalog. We will come back to this.

What does not move at all: customer passwords. This is a security architecture decision, not a limitation either platform can work around. Customers reset their passwords on first login to the new store. Plan your post-launch email communication accordingly.

Custom WooCommerce plugin functionality needs to be replaced with Shopify apps or custom development before you go live. Identify your ten most critical plugins and find their Shopify equivalents during the planning phase, not after launch.

The Migration Process

Step 1: Crawl your live WooCommerce site before touching anything. Use Screaming Frog or export your URL list from Google Search Console. Every URL on your current site becomes a row in your redirect map. Do not skip this step. Missing URLs in your redirect map are missing SEO authority.

Step 2: Back up everything. Your database, your media library, your plugin list, your theme files. This is insurance. You will probably never need it. Do it anyway.

Step 3: Set up your Shopify store in parallel. Do not take the WooCommerce store offline. Build the Shopify store while the existing site continues to run. Choose your plan, configure Shopify Payments as your primary processor (this avoids the additional transaction fee that applies when using third-party processors), select your theme. Do not connect your domain yet.

Step 4: Migrate your product data. For catalogs under a few hundred products, Shopify's native CSV import is sufficient. For anything larger or more complex — particularly stores with custom metafields, complex variant structures, or large order histories — use Matrixify. It is the professional standard for bulk data operations in Shopify for good reason: changes are traceable, controllable, and reversible if something goes wrong mid-import.

We migrated Petwell.co.uk with over 10,000 SKUs using this approach. The full migration completed in eight weeks. We migrated Llantas Cavazos with over 8,000 SKUs in under 7.5 weeks. Both stores retained their organic traffic from the first week after launch.

Step 5: Rebuild your theme in Liquid. Your WooCommerce theme does not transfer. Shopify uses Liquid as its templating language. PHP code from WordPress has no equivalent. Use the migration as an opportunity to move to a conversion-optimized Shopify theme rather than trying to recreate your old design exactly. The stores that do best after migration are the ones that treat the theme rebuild as an upgrade, not a copy job.

Step 6: Map and upload your 301 redirects. Take the URL spreadsheet from Step 1. Build a second column with the corresponding new Shopify URL for every row. Upload via Shopify's bulk redirect import tool. Verify the redirects are resolving correctly before you touch your DNS. This step is where migrations succeed or fail from an SEO standpoint. We will cover this in more detail in the SEO section below.

Step 7: Replace your plugins. Go through your critical plugin list and configure the Shopify equivalents. Test each one in your staging environment before launch. Do not assume they work — verify they work.

Step 8: QA everything before going live. Test checkout end to end with a real payment method. Test on mobile, on multiple browsers, and on slow connection speeds. Verify your tracking pixels and GA4 are firing correctly. Confirm your email automations are configured. Run your top 15 to 20 URLs through the redirect checker to confirm they resolve.

Step 9: DNS cutover. Lower your TTL 24 hours before you switch. When you connect your domain in Shopify and update your DNS records, the changeover typically propagates within a few hours. Monitor closely for the first 48 hours.

Step 10: Post-launch monitoring. Submit your new sitemap to Google Search Console on launch day. Monitor crawl errors weekly for six weeks. Check your core rankings every three to five days for the first month. Some fluctuation in the first two to four weeks is normal and expected. If rankings have not stabilized by week six, your redirect map has gaps.

Timeline and Cost

A WooCommerce migration for a store with a few hundred products and a straightforward catalog runs two to four weeks from audit to launch. Mid-size stores with 500 to 5,000 products and custom plugin functionality typically take four to eight weeks. Stores in the 10,000+ SKU range, like Petwell.co.uk, require eight to twelve weeks when done properly.

Agency cost for a professional mid-market migration ranges from $5,000 to $20,000 depending on catalog size, theme complexity, and the amount of custom development required to replace plugin functionality. A flat-rate estimate is only possible after a proper store audit.

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BigCommerce to Shopify Migration

Why BigCommerce Merchants Are Moving in 2026 Specifically

BigCommerce is a capable enterprise platform. It is also undergoing a pricing restructuring in 2026 that has pushed a meaningful number of mid-market merchants to revisit the calculus. BigCommerce introduced a new Open Payment Provider Fee and revised its GMV thresholds, which means some stores that were comfortable at their previous plan tier are now facing higher costs without a corresponding increase in platform capability.

The ecosystem gap also matters here. The Shopify App Store has over 13,000 apps in 2026. BigCommerce's marketplace is a fraction of that. For merchants whose growth depends on marketing tools, loyalty programs, subscription apps, and review systems, the available integration depth on Shopify is meaningfully broader.

The Technical Consideration Unique to BigCommerce

BigCommerce uses Handlebars as its templating language. Shopify uses Liquid. Your BigCommerce theme does not transfer — it gets rebuilt. This is the largest time investment in a BigCommerce migration for most stores. Plan for it explicitly in your project scope rather than discovering it mid-project.

On variants: Shopify raised its product variant limit to 2,048 for all merchants in October 2025, up from the long-standing 100-variant ceiling. The 3-option-per-product structure remains in place. High-variant catalogs coming from BigCommerce should still be audited carefully before migration, since some apps not built on Shopify's current GraphQL product APIs may have compatibility issues with products exceeding 100 variants.

What Moves

Products, variants, pricing, inventory, images, customer records, order history, and blog content all transfer using tools like Matrixify or LitExtension. Customer passwords do not — same architecture constraint as WooCommerce migrations. BigCommerce category structures need to be remapped to Shopify's collection model, which works differently.

URL structure changes: BigCommerce typically uses /category/product-name/. Shopify uses /products/product-name/. Full redirect mapping is required.

Timeline and Cost

Mid-market BigCommerce migrations run four to eight weeks. High-variant catalogs or stores with significant custom integrations extend to eight to twelve weeks. Agency cost mirrors WooCommerce migrations: $5,000 to $20,000 for mid-market. Enterprise projects or Shopify Plus migrations start at $25,000 and scale from there depending on scope.

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Square Online to Shopify Migration

Square Online merchants occupy a specific category. Most arrived on Square as an extension of their physical retail operation — the POS was already Square, so the online store followed. It is a logical starting point, and Square Online works adequately for a store with a modest catalog and limited customization needs.

The ceiling tends to arrive in the form of design constraints, a thin app ecosystem, and the absence of meaningful multichannel or AI commerce features. When a Square Online merchant decides to move, the migration is technically the simplest of the three scenarios in this guide. Catalogs are typically smaller. Data structures are less complex. SEO equity is usually more limited, which reduces the redirect mapping workload.

Shopify's free Store Importer app handles basic Square migrations directly. Products, customers, and basic page content transfer. For stores with more specific needs, LitExtension covers the remainder. Square's POS does not transfer to Shopify's system, but Shopify POS is a mature replacement and worth evaluating as part of the project scope.

The theme rebuild is still the main time investment. Square's design system does not map to Shopify's Liquid themes. Allocate the bulk of your timeline accordingly.

Timeline and cost: Small Square stores migrate in one to two weeks. Mid-size stores with meaningful catalog depth and theme customization run two to four weeks. Agency cost for Square to Shopify migrations typically ranges from $2,500 to $8,000.

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SEO Preservation: Where Migrations Succeed or Fail

Every migration is a potential SEO event. The outcome depends almost entirely on how the redirect work is executed.

The core principle is simple. Search engines have indexed your current URLs. Those URLs carry authority built up over months or years. When you move to Shopify, those URLs change. Without 301 redirects, search engines treat the old pages as deleted and the new pages as new — you lose the authority transfer. With properly mapped 301 redirects, the authority passes to the new URLs and your rankings remain largely intact.

Llantas Cavazos retained over 90% of their organic traffic from week one of launch after migration. That result comes from one thing: thorough redirect mapping done before the DNS cutover, not after.

The process:

Before you touch anything else, crawl your existing site and export every URL. Products, collections, blog posts, static pages, category pages. Every one. This is your source file.

Build a redirect map: old URL in one column, corresponding new Shopify URL in the second. For large catalogs, do this in a spreadsheet and use Shopify's bulk redirect import to upload it in one pass. The URL redirect tool is in your Shopify admin under Online Store > Navigation.

Copy your metadata before migration. Title tags and meta descriptions from your highest-traffic pages go into a spreadsheet and get applied to the corresponding Shopify pages before launch. Even a small change to a high-ranking title tag can drop click-through rate and trigger a ranking adjustment.

After launch: submit your new Shopify sitemap to Google Search Console on day one. The sitemap is auto-generated at yourdomain.com/sitemap.xml. Monitor for crawl errors weekly. Check your core rankings every few days for the first month. Two to four weeks of minor fluctuation is normal. If things have not stabilized by week six, the redirect map has gaps and needs auditing.

Stores that lose organic rankings permanently after platform migrations almost always made one of two mistakes: they skipped the redirect mapping, or they rushed it and missed a significant portion of the URL inventory.

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Should You Hire an Agency or Handle It Yourself?

The honest answer depends on what your store looks like and what organic search means to your revenue.

DIY is reasonable if your catalog has fewer than 200 products, you are technically comfortable working with CSV files and Shopify's admin, your SEO footprint is limited, and you do not have complex plugin functionality that needs to be replicated. For a straightforward store, the Shopify importer tools and the documentation are sufficient.

Hire an agency if any of the following are true: your catalog exceeds 500 products, organic search drives meaningful revenue (which means an SEO error is a revenue error), you have custom functionality that needs to be rebuilt rather than just replaced, your variant structure is complex, or you are targeting Shopify Plus.

The agencies worth hiring for migration work are the ones who will tell you when they think you should not migrate, or when your timeline is unrealistic. That conversation is not a red flag. It is the sign of a team that has done this enough times to know what goes wrong when the planning is compressed.

	DIY	Agency
Catalog size	Under 200 products	500+ products
SEO risk	Low to moderate	High
Timeline	Flexible	Structured
Cost	$0 to $500 in tools	$2,500 to $20,000+
Data integrity	Dependent on skill	Professionally validated
Post-launch support	Self-managed	Included

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Common Questions

How long does a Shopify migration take? Small stores with simple catalogs: one to four weeks. Mid-market stores with 500 to 5,000 products and custom functionality: four to eight weeks. Stores with 10,000+ SKUs: eight to twelve weeks. These are realistic ranges based on actual project timelines, not marketing estimates.

Will my search rankings drop after migration? Not necessarily. With a complete redirect map deployed before launch and metadata carefully preserved, most stores retain the majority of their organic traffic within the first few weeks. Llantas Cavazos retained over 90% from week one. Shortcuts in the redirect process are the primary cause of ranking drops after migrations.

Can I bring my customer order history to Shopify? Yes. Order history transfers via CSV import or tools like Matrixify. Customer passwords cannot transfer for security reasons — customers reset on first login.

Do I need Shopify Plus to migrate from WooCommerce or BigCommerce? No. Standard Shopify plans handle the vast majority of mid-market migrations. Shopify Plus becomes relevant when you need custom checkout functionality, B2B features at scale beyond what the standard plans provide, or expansion store structures.

What is Matrixify and do I need it? Matrixify is a bulk data management app for Shopify. It is the tool of choice for professional-grade catalog migrations, particularly for stores with large product counts, complex metafields, or significant order history. For catalogs over a few hundred products, it is the right tool. For very small stores, Shopify's native CSV import is sufficient.

How much does a professional migration cost? Square to Shopify: $2,500 to $8,000. WooCommerce or BigCommerce to Shopify for a mid-market store: $5,000 to $20,000. Enterprise or Shopify Plus migrations: $25,000 and up. A firm quote requires a store audit.

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Working With Shugert

Shugert has been a Shopify Select Partner since 2015. We have completed more than 30 major platform migrations since 2016, including stores with catalogs over 10,000 SKUs.

We do not take on every migration request. We work with merchants we trust and whose businesses we believe in long-term. If you are looking for a transactional agency to execute a job and move on, there are other options. If you want a team that will be accountable to the outcome six months after launch, we should talk.

The first step is an audit of your current store. We will tell you what the migration involves, what the realistic timeline looks like, and what it will cost — before you commit to anything.

Get in touch here or connect with Samuel directly on LinkedIn.

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Samuel Noriega is the Founder and CEO of Shugert, a Shopify Select Partner agency with offices in Barcelona and New York and a development team in Hermosillo. He has led Shopify strategy and migration projects for US and international brands since 2006.