How to Migrate From BigCommerce to Shopify Without Downtime

Migrating from BigCommerce to Shopify is a significant platform change, but it does not have to disrupt your business. Both platforms are mature e-commerce solutions, which means the migration path between them is well-established with proven tools and processes. The key to a successful migration is building your entire Shopify store in parallel while your BigCommerce store continues operating, then executing a clean cutover that minimizes or eliminates customer-facing downtime.

This guide covers the complete BigCommerce to Shopify migration process, including data export procedures, import tools and methods, feature mapping between platforms, a zero-downtime cutover strategy, and a thorough post-migration testing checklist. Whether you are migrating a store with 50 products or 5,000, this guide provides the roadmap for a smooth transition.

Why Merchants Move From BigCommerce to Shopify

App Ecosystem and Integrations

Shopify's App Store contains over 8,000 apps compared to BigCommerce's approximately 1,000. For merchants who need specialized functionality like advanced subscription billing, AI-powered product recommendations, comprehensive loyalty programs, or niche industry tools, Shopify's ecosystem provides significantly more options.

Checkout Experience

Shopify's checkout has been optimized through billions of transactions and consistently outperforms most alternatives in conversion rate benchmarks. Shop Pay, Shopify's accelerated checkout, provides one-click purchasing for returning customers and has been shown to increase conversion rates by up to 50% compared to standard guest checkout. BigCommerce's checkout is functional but lacks an equivalent accelerated checkout experience.

Theme and Design Flexibility

Shopify's theme ecosystem, with over 100 free and premium themes, provides more design variety and customization options than BigCommerce's template marketplace. Shopify's Online Store 2.0 architecture with sections everywhere and app blocks gives merchants greater design flexibility without code.

Platform Momentum and Ecosystem Growth

Shopify's market share and developer ecosystem are growing faster than BigCommerce's, which means more frequent feature releases, more app choices, and more third-party resources for merchants. This momentum translates to better tools and more innovation for your store over time.

Shopify Payments

Shopify Payments provides an integrated payment solution that eliminates additional transaction fees, simplifies financial reconciliation, and provides a seamless checkout experience. While BigCommerce supports multiple payment gateways, the lack of a first-party payment solution means more complexity in payment management.

Phase 1: Pre-Migration Planning (Days 1-3)

Complete Store Inventory

Document everything that needs to migrate from your BigCommerce store:

Products:

• Total number of products and variants
• Custom fields and product options
• Product images (count per product)
• Product categories and subcategories
• Brand pages
• Product reviews

Customers:

• Total customer count
• Customer groups and segments
• Saved addresses and payment methods (note: payment methods cannot be migrated)
• Customer-specific pricing

Orders:

• Total order count and history depth you want to preserve
• Active subscriptions or recurring orders
• Outstanding orders that need fulfillment

Content:

• Blog posts with their URLs
• Static pages (About, Contact, FAQ, etc.)
• Category descriptions
• Brand descriptions
• Custom web pages

Integrations:

• Email marketing platform
• Accounting software
• Inventory management
• Shipping solutions
• Analytics tools
• Social media connections

URL Structure Comparison

BigCommerce and Shopify use different URL patterns:

Note that BigCommerce allows custom URL structures, so your actual URLs may differ from the defaults. Check your BigCommerce SEO settings for your configured URL format.

Set Up Shopify Trial

Start your Shopify free trial to begin building the new store. Use the trial period to configure everything before going live.

Select your Shopify plan based on your current BigCommerce plan:

Phase 2: Data Export From BigCommerce (Days 3-5)

Product Export

Navigate to Products in your BigCommerce admin and click Export:

1. Select all products or filter by category
2. Choose the CSV export format
3. Include all product fields in the export
4. Download the file

The BigCommerce product CSV includes comprehensive data: product name, type, SKU, description, price, cost price, retail price, sale price, weight, width, height, depth, categories, brand, inventory tracking, inventory level, images, search keywords, page title, meta description, and custom fields.

Important: Product images are included as URLs in the CSV. Ensure these URLs remain accessible during the import process (keep your BigCommerce store active).

Customer Export

Navigate to Customers and click Export:

1. Select all customers
2. Download the CSV

The export includes first name, last name, email, phone, company, address (street, city, state, zip, country), customer group, date created, and order count.

Note: Customer passwords cannot be exported from BigCommerce due to security hashing. Customers will need to reset their passwords on the new Shopify store. Plan to communicate this to your customer base during the migration.

Order Export

Navigate to Orders and click Export:

1. Set date range (typically full history)
2. Select all order statuses
3. Download the CSV

Order history is important for customer service continuity and business analytics. Shopify does not natively import order history through CSV, so you will need a migration app or API integration to transfer this data.

Blog and Content Export

Navigate to Web Content then Blog to export blog posts:

1. Select all posts
2. Export as CSV or manually copy content

For web pages, go to Web Content then Web Pages and either export or manually document each page's content, URL, and metadata.

Category Structure Export

Document your BigCommerce category hierarchy including parent categories, subcategories, category descriptions, category images, and URLs. This hierarchy needs to be recreated as Shopify collections.

Phase 3: Data Import to Shopify (Days 5-10)

Migration Approach Selection

Choose your migration method based on store complexity:

Method 1: Shopify's Built-in CSV Import

Best for: Stores with fewer than 500 products and simple data structures.

Process:

1. Download Shopify's sample product CSV template
2. Reformat your BigCommerce product data to match Shopify's format
3. Upload through Products then Import in the Shopify admin

Key formatting changes needed:

• Column headers must match Shopify's exact naming convention
• Each product variant gets its own row with the same Handle
• Images need to be formatted as image URLs in the Image Src column
• Product types and tags replace BigCommerce categories and brands
• HTML descriptions go in the Body (HTML) column

Method 2: Migration App (LitExtension or Cart2Cart)

Best for: Stores with 100-5,000 products that need automated migration.

Process:

1. Sign up for the migration service
2. Connect your BigCommerce store (via API credentials)
3. Connect your Shopify store (via API credentials)
4. Configure migration settings (which entities to migrate)
5. Run the demo migration to verify data accuracy
6. Execute the full migration
7. Verify results

These services handle field mapping automatically and can transfer products, customers, orders, blog posts, and categories. Pricing starts at approximately $29 and scales based on entity count.

Method 3: API-Based Migration

Best for: Large stores with 5,000+ products, complex customizations, or extensive data.

Process:

1. Use the BigCommerce API to extract all store data programmatically
2. Transform the data to match Shopify's API format
3. Use the Shopify API to import products, customers, and other data
4. Handle edge cases (custom fields, complex variants, etc.) through custom logic

This method requires development resources but provides maximum control and can handle any data complexity.

Product Import Verification

After importing products, verify a representative sample (at least 10% of your catalog):

• Product titles match exactly
• Descriptions are complete and properly formatted
• All images transferred successfully with correct alt text
• Pricing is accurate (regular price, compare-at price, cost per item)
• Variants are correctly configured (options, pricing, SKUs, inventory)
• Product types and tags are properly assigned
• SEO metadata (page title, meta description) transferred correctly
• Product weights are accurate for shipping calculations

Collection Setup

Recreate your BigCommerce category structure as Shopify collections:

1. Create automated collections based on product types or tags
2. Set collection URLs to match your redirect mapping
3. Add collection images and descriptions
4. Organize collections into the navigation structure

For hierarchical categories (parent/child), Shopify does not support nested collections natively. Use a combination of navigation menus and collection tags to create the browsing hierarchy your customers expect.

Customer Import

Import customer data using Shopify's customer CSV import:

1. Format your BigCommerce customer data to match Shopify's customer CSV template
2. Upload through Customers then Import
3. Customers will receive a password reset invitation when they first try to log in

For customer groups with custom pricing (a BigCommerce feature), you will need a Shopify app like Bold Custom Pricing or upgrade to Shopify Plus for wholesale channel functionality.

Order History Import

Order history import requires a migration app (LitExtension, Cart2Cart) or API-based migration. The Shopify CSV importer does not support order imports. Transferred orders appear in the Orders section of your Shopify admin and are linked to the corresponding customer records.

Phase 4: Store Configuration (Days 10-14)

Theme and Design

Select a Shopify theme that matches your BigCommerce store's design aesthetic:

For catalog-heavy stores: Consider Warehouse ($350) or Dawn (free) themes that handle large product catalogs well.

For brand-focused stores: Look at Prestige ($350) or Refresh (free) for clean, branded presentations.

For general retail: Symmetry ($350) or Dawn (free) provide versatile layouts.

Customize your chosen theme to match your BigCommerce branding: same colors, fonts, logo, and general layout structure. The goal is visual continuity so returning customers feel at home on the new platform.

Shipping Configuration

Recreate your BigCommerce shipping rules in Shopify:

1. Go to Settings then Shipping and delivery
2. Set up shipping zones matching your BigCommerce configuration
3. Configure shipping rates (flat rate, calculated, free shipping thresholds)
4. Set up shipping profiles if you have products with different shipping requirements

Shopify includes pre-negotiated shipping discounts with USPS, UPS, and DHL, which may be better than the rates you had on BigCommerce.

Tax Configuration

Configure tax settings in Settings then Taxes and duties:

1. Enable automatic tax calculation
2. Verify tax rates for your nexus states
3. Configure product tax codes for any exempt products
4. Set up international tax settings if applicable

Payment Processing

Set up Shopify Payments to eliminate additional transaction fees:

1. Go to Settings then Payments
2. Enable Shopify Payments and enter your business and banking information
3. Configure accepted payment methods (credit cards, Apple Pay, Google Pay, Shop Pay)
4. Set up PayPal as a secondary payment option

App Installation

Install Shopify apps to replace BigCommerce features and integrations:

Phase 5: SEO Redirect Implementation (Days 14-16)

Creating the Redirect Map

Map every BigCommerce URL to its Shopify equivalent. This is the most critical step for preserving your search rankings.

Use your pre-migration crawl data, Google Search Console data, and analytics data to identify every URL that receives organic traffic or has external backlinks.

Implementing Redirects

In Shopify, go to Online Store then Navigation then URL Redirects:

For bulk redirects, prepare a CSV with two columns:

Upload the CSV through the URL Redirects page.

BigCommerce-Specific Redirect Considerations

Brand pages: BigCommerce has dedicated brand pages (/brands/brand-name/) that do not have a direct Shopify equivalent. Create redirects to the most relevant collection or a custom page.

Compare page: BigCommerce includes a built-in product comparison feature. If this page was indexed, redirect it to a relevant collection.

Gift certificate pages: Redirect to Shopify's gift card page or a relevant product.

Category filters: BigCommerce category pages with filter parameters may be indexed. Create redirects for the most common filtered URLs to appropriate Shopify collections.

Redirect Testing

Test at least 50 redirects across different content types. Verify each returns a 301 status code and lands on the correct Shopify page.

Phase 6: Zero-Downtime Cutover Strategy (Days 16-18)

The Parallel Operation Approach

The zero-downtime strategy involves running both stores simultaneously during the transition:

1. Keep BigCommerce live throughout the entire setup process on Shopify
2. Build Shopify completely including all products, content, design, apps, and redirects
3. Test everything on Shopify using the myshopify.com domain
4. Schedule the DNS change for a low-traffic period (typically Tuesday-Wednesday at 2-4 AM)
5. Execute the DNS change by updating your domain's A record and CNAME to point to Shopify
6. Keep BigCommerce active for 48-72 hours after the DNS change to serve visitors whose DNS has not propagated

During the Transition Window

For the 24-48 hours of DNS propagation:

Order management: You may receive orders on both platforms. Check both admin dashboards regularly and ensure all orders are fulfilled regardless of which platform received them.

Customer communication: If a customer contacts you about an issue, check both platforms for their order information.

Monitoring: Watch both platforms' analytics to understand when the transition is complete. When BigCommerce traffic drops to near zero, DNS propagation is complete.

Post-Cutover Verification

Once DNS propagation is complete (typically 48 hours):

1. Verify your domain loads the Shopify store
2. Verify SSL is active (padlock icon in browser)
3. Place a test order to confirm end-to-end checkout functionality
4. Submit your new sitemap to Google Search Console
5. Verify all redirects are working in the production environment

Phase 7: Post-Migration Testing Checklist (Days 18-25)

Product Verification

• All products are visible and accurately displayed
• Product images load correctly
• Variant selections work properly
• Pricing is accurate for all products and variants
• Inventory levels are correct
• Product search returns accurate results
• Collection pages display the right products
• Product filtering works as expected

Checkout and Payment Testing

• Products can be added to cart
• Cart calculates totals correctly
• Shipping rates are accurate for all zones
• Tax calculations are correct
• Discount codes work (if applicable)
• All payment methods process successfully
• Order confirmation emails are sent and formatted properly
• Orders appear in admin with correct details

Content Verification

• All pages display correct content
• Blog posts are accessible and properly formatted
• Images load on all pages
• Navigation links are correct
• Footer links work
• Contact form submissions arrive properly

SEO Verification

• All 301 redirects are working
• No unexpected 404 errors in Search Console
• Sitemap is accessible and accurate
• Meta titles and descriptions are in place
• Product schema markup is valid
• Robots.txt is not blocking important pages

Mobile Testing

• All pages render correctly on mobile
• Touch targets are appropriately sized
• Checkout flow works on mobile devices
• Images are responsive
• Navigation menu works on mobile

Performance Testing

• PageSpeed Insights score is acceptable (aim for 70+ on mobile)
• Core Web Vitals pass
• Page load times are under 3 seconds

BigCommerce vs Shopify Feature Mapping

For features you relied on in BigCommerce, here are the Shopify equivalents:

Post-Migration SEO Monitoring (Weeks 3-8)

Weekly Monitoring Tasks

Google Search Console:

• Check for new crawl errors weekly
• Monitor index coverage trends
• Review search performance data (clicks, impressions, position)
• Check for Core Web Vitals issues

Google Analytics:

• Compare organic traffic to pre-migration baselines
• Monitor conversion rate trends
• Watch for changes in bounce rate by landing page
• Track revenue from organic sources

Ranking Tracking:

• Monitor keyword positions for your top 20-50 terms
• Flag any keywords that drop more than 10 positions
• Investigate and address causes of significant drops

Expected Recovery Timeline

• Week 1-2: Temporary traffic dip of 10-20%
• Week 3-4: Recovery to 80-90% of pre-migration levels
• Week 5-8: Full recovery to pre-migration levels
• Month 3-6: Potential improvement beyond pre-migration levels

Troubleshooting Slow Recovery

If organic traffic has not recovered by week 4:

1. Audit redirects: Check for missing redirects by reviewing 404 errors in Search Console
2. Content comparison: Verify content on Shopify matches the original BigCommerce content
3. Technical SEO audit: Run a full site crawl to identify technical issues
4. Page speed check: Ensure Shopify pages are loading as fast as or faster than BigCommerce
5. Schema verification: Confirm structured data is properly implemented

When to Cancel BigCommerce

Maintain your BigCommerce subscription for 30-60 days after going live on Shopify. During this period:

• Monitor for any data that was missed during migration
• Reference the old store for customer service inquiries about historical orders
• Verify that all SEO redirects are properly resolving
• Confirm organic traffic has stabilized on the new platform

Once you are confident the migration is complete and stable, cancel your BigCommerce subscription. Before canceling, download a final backup of all data as a permanent archive.

A BigCommerce to Shopify migration executed correctly is a seamless transition that your customers barely notice while your business gains access to a larger app ecosystem, better checkout conversion, and a faster-growing platform. The zero-downtime approach ensures your revenue stream is never interrupted, and thorough post-migration monitoring catches any issues before they impact your business long-term.

Ready to optimize your newly migrated Shopify store for AI-powered product discovery? Run a free AI visibility audit to see how AI shopping assistants find and recommend products in your category.

Need expert guidance on your BigCommerce to Shopify migration? Contact our team for a personalized migration strategy and AI visibility optimization.

Further Reading

• Shopify SEO for Beginners: The Complete Guide
• Shopify Pricing: Complete Cost Breakdown for 2026
• How to Save Money on Shopify: Discounts, Annual Billing, and 15 Cost-Cutting Tips
• Shopify Conversion Rate Optimization Guide