BigCommerce to Shopify Plus migration

4–⁠12 weeks. A single BigCommerce storefront with products that fit Shopify’s three options, common apps and its current design recreated sits near the short end. B2B Edition workflows, many modifiers to restructure, ERP integration, checkout customizations or a full redesign push it toward 12 weeks. The free migration assessment places your store in that range, and a fixed timeline with milestones is agreed before work starts.

Most BigCommerce migrations cost $30,000–⁠$70,000. Complexity moves the price more than catalog size: options and modifiers, B2B requirements, checkout logic, integrations and design scope. The free assessment gives you a cost band without store access, and the price is fixed in writing after a deeper review, before work starts. SEO preservation is always included. The Shopify Plus subscription and app fees are billed separately by Shopify and each vendor.

Often, on platform fees alone. As of October 2026, Shopify Plus starts at $2,300 a month on a three-year term, high-volume stores move to a revenue-based fee, and using a third-party gateway instead of Shopify Payments adds a Shopify transaction fee, currently reported as 0.20%, on top of your processor’s fees. BigCommerce’s June 2026 changes lowered its sales caps and added a fee of up to 2% on self-serve plans for gateways outside its embedded list, so compare both at your volume. The case for moving is apps, checkout and speed of change – if price decides it, we’ll tell you to stay.

Variant options become Shopify options and variants – up to 2,048 variants per product, but only three options. Products with more options are split into linked products, or non-stock choices move into metafields. Modifiers that collect input, like engraving text or file uploads, become line item properties that reach the order. Add-ons that change the price become bundles, an options app or, on Shopify Plus, a cart transform Function – custom pricing logic that runs in Shopify’s cart. You approve the product model first.

Usually, yes. Company accounts, price lists, net terms, quotes and sales-rep assignments map to Shopify’s built-in B2B: companies with locations, catalogs with volume pricing, payment terms, draft-order quotes and sales staff limited to their assigned companies. Core B2B has been on every paid Shopify plan since April 2026; Plus adds more than three catalogs, company-specific catalogs and deposits. Shopping lists and buyer-side approval chains aren’t built in, so they are scoped up front as an app or a light custom build.

Not if the redirects are right on launch day, though nobody can honestly promise rankings won’t move at all. BigCommerce lets every product, category, brand and page carry a custom URL – often at the root, like /blue-widget/ – while Shopify puts them under fixed /products/, /collections/ and /pages/ paths, so nearly every URL changes. We export the full URL set together with the 301s already saved in BigCommerce, flatten chains so old links reach the final page in one hop, and map faceted-search URLs pattern by pattern rather than sending them all to one page. Titles, meta descriptions and canonicals carry over, structured data is rebuilt, and rankings and crawl errors are monitored after launch. SEO preservation is part of every migration, never an add-on.

Accounts, addresses and order history move, and customer groups become tags, segments or B2B companies. Passwords don’t, because BigCommerce doesn’t export them – and they aren’t needed. A new Shopify store uses Shopify’s customer accounts, where customers sign in with a one-time code sent by email; the older password-based accounts are no longer offered to new stores. We plan the launch emails with you so returning customers know how to sign in.

Almost always, and usually several. Many vendors, including Klaviyo, Yotpo, ShipStation and Avalara, run on both platforms, so those swaps are like for like. Features BigCommerce includes, such as product reviews and bulk pricing, become a Shopify app, a native feature or a Shopify Function. We map every app in discovery and agree the replacements with you before the build starts.