BigCommerce to Shopify migration

BigCommerce and Shopify are both hosted ecommerce platforms, but they handle URLs, product data, categories, checkout and app ecosystems differently.

A migration that ignores those differences will lose search equity that took years to build.

This guide covers what actually changes when you move from BigCommerce to Shopify, where the SEO risk concentrates, and how to protect revenue pages through the transition.

Why BigCommerce to Shopify migrations lose search equity

Most BigCommerce-to-Shopify migrations that lose traffic make the same mistake: they treat the migration as a design project rather than a technical SEO project.

The theme is rebuilt, the products are imported, the store goes live — and six weeks later, Search Console shows a 40% drop in impressions.

The cause is almost always the same: redirects were incomplete, category URL structures changed without a redirect map, or post-launch crawl validation was skipped.

URL structure differences between BigCommerce and Shopify

BigCommerce and Shopify use different URL structures for most page types.

The product URL path is sometimes the same or similar. The category-to-collection mapping is where most redirect errors happen.

BigCommerce category pages sitting at root level (/running-shoes/) map to Shopify collections under a subdirectory (/collections/running-shoes/). Every category URL needs a 301 redirect.

What changes in the product data

BigCommerce and Shopify handle product data similarly at the basic level but diverge in specific areas:

Variants. BigCommerce supports up to 600 variants per product without options limits. Shopify limits products to 100 variants (or 2,000 with Shopify Plus combinations metafields). Stores with high variant counts need to audit before migration.

Custom fields. BigCommerce custom fields map to Shopify metafields, but the data structure is different. A standard CSV migration will not transfer custom fields — they require either manual re-entry or an API-based migration tool.

Product categories. BigCommerce products can belong to multiple categories simultaneously. Shopify collections work differently — products can appear in multiple collections, but the underlying collection structure follows Shopify’s model. Complex taxonomy hierarchies need manual restructuring.

Pricing. BigCommerce supports price lists for different customer groups. Shopify handles this via markets, customer tags and Shopify Plus B2B features. If the BigCommerce store uses customer-specific pricing, this needs Shopify Plus or a specialist app.

Building the redirect map

The redirect map is the most important migration task. It is also the most underestimated.

A complete redirect map requires:

1. Crawl the live BigCommerce store and export all indexed URLs by page type (products, categories, brand pages, blog posts, static pages).
2. Score each URL by traffic and revenue — not all URLs need equal protection.
3. Map each old BigCommerce URL to the equivalent Shopify destination.
4. Flag URLs with no clear destination (deleted products, retired categories) — decide whether they go to the parent collection or the homepage.
5. Build the redirect file in Shopify format and implement before DNS cutover.
6. Validate redirects on the staging site before going live.

Category pages and top product pages are the highest priority. Blog post redirects matter for guide-heavy stores. Brand or manufacturer pages that rank for brand + category terms deserve individual review.

A common shortcut is to redirect all old category URLs to the homepage. This passes no equity. Always redirect to the equivalent collection or the closest relevant collection.

Post-launch validation for BigCommerce migrations

After launch, validate in this order:

Day 1: Check that Google Search Console still receives data. Check that GA4 purchase events fire. Crawl 50 priority pages and confirm 200 status codes (not 301 chains).

Days 2–7: Monitor Search Console for new 404 errors. Check that redirect chains are not building up. Confirm that the XML sitemap is submitted and resolves to a 200.

Weeks 2–4: Track impressions and clicks for the top 20 pages in Search Console. A short-term drop in the first two weeks is normal. A sustained drop after week three signals redirect or indexation issues.

Month 2: If impressions are recovering, validate that rich results (product schema, review schema) are rendering correctly using the Rich Results Test.

Where BigCommerce stores commonly lose traffic after migrating

Faceted navigation. BigCommerce and Shopify handle filtered URLs differently. If BigCommerce used indexable filtered URLs that ranked for specific modifier terms (e.g. /running-shoes/colour-red/), check whether Shopify canonicalises or blocks equivalent filter URLs.

Blog content. Blog post URLs change from BigCommerce’s path structure to Shopify’s /blogs/blog-name/ structure. Every blog post with search traffic needs a redirect.

Brand pages. BigCommerce often supports brand pages as a first-class page type. Shopify does not have a native equivalent. Brand pages with search traffic need to be rebuilt as collection pages with brand-filtered products, not just abandoned.

Pagination. BigCommerce pagination uses ?page=2 parameters. Shopify uses ?page=2 too but the canonical structure differs. Check that paginated collection pages do not lose their canonical relationship to the root collection.

What the migration checklist covers

The full WooCommerce and Shopify migration checklist applies equally to BigCommerce migrations. The phases are the same:

• Pre-migration audit and URL inventory
• Data export and cleaning
• Theme build and app configuration
• Redirect map creation and implementation
• Staging QA (schema, redirects, analytics, performance)
• Launch and monitoring

BigCommerce-specific additions include: variant count audit, custom field mapping plan, price list migration strategy, and brand page handling.

Where to go next

• Download the full migration checklist →
• Score your migration risk before committing to a timeline →
• Estimate how long the migration will take →
• Build the redirect map properly →
• Validate analytics after migration →