How Long Does a BigCommerce to Shopify Migration Take?

A BigCommerce to Shopify migration can be completed in as little as five weeks, with SEO and CRO intact.

• A data migration only runs about 5 weeks with an experienced agency at the helm. 
• A full-service migration with design, content, and custom integrations runs 8 to 12 weeks.
• Complex Shopify Plus builds with B2B, subscriptions, or heavy custom functionality can run 12 to 20 weeks.

BigCommerce to Shopify Migration Timelines by Project Type

When you’re migrating to Shopify from BigCommerce, the type of migration project is the biggest timeline determinant. Here are three different ways you can replatform to Shopify and the timeline for each.

Data Migration Only (5 weeks)

A simple data move is the fastest BigCommerce to Shopify migration possible at production quality. You keep your current design and we import your product catalog cleanly, set up payments, redirect your URLs, and launch. 

Even with this accelerated migration schedule, our full-service ecommerce agency puts conversion rate optimization front and center of every project so you don’t experience CRO drops when you move platforms.

Find out how to preserve SEO and CRO during a BigCommerce to Shopify migration.

This works best when:

• Your catalog is clean and well-organized
• Your current design and branding works and you do not want to change it
• You are not running custom B2B, subscriptions, wine clubs, or wholesale features
• Your integration list is short and Shopify-native apps cover what you need

Expect that you can be live on Shopify in about 5 weeks.

Full-service Shopify migration (8 to 12 weeks)

Most $5M to $30M DTC brands moving off BigCommerce take 8 - 12 weeks because they also want to refresh their brand, optimize their store, and make improvements to processes at the same time. 

In addition to moving data, a full-service project includes:

• A redesign or substantial design refresh
• Content strategy and rewrites on key category and product pages
• Further CRO input on the conversion path
• Integration work for ERP, 3PL, email, reviews, or loyalty
• App integrations and some custom solutions to make easier to buy and easier to sell

This solution is ideal for brands that want to see improvements in processes, sales, and branding. It’s strategist-led and supported by our Shopify Preferred Partner development team. 

Find out what it costs to move from Shopify to BigCommerce.

Custom Shopify Plus migration (12 to 20 weeks)

The longest timelines apply to brands with operational complexity that does not move cleanly into a default Shopify setup. This is where a truly custom experience is needed to craft a unified commerce Shopify experience that is truly built for the needs of your brand.

This includes:

• Shopify Plus features like B2B, expansion stores, and custom checkout
• Wholesale or trade portals with separate pricing logic
• Subscription overhauls or wine club management
• Custom functionality that needs to be rebuilt as Shopify apps or custom code
• Multi-store, multi-currency, or multi-language setups

These projects take 12 to 20 weeks because much of the work is engineering a Shopify equivalent of functionality of your current platform or building out custom solutions for complex ecommerce brands. The more complex your store and business model, the longer the estimated timeframe for a BigCommerce to Shopify migration.

What drives your BigCommerce to Shopify migration timeline

Some of the factors that can impact your platform migration include:

1. Catalog size and cleanliness. A 500-SKU catalog with clean data migrates faster than a 5,000-SKU catalog with inconsistent variant naming. If catalog cleanup happens before the migration, timelines can accelerate it. Catalog cleanup that happens during a migration or that requires expert assistance can add to the timeline.
   
   
2. Custom functionality on BigCommerce. Anything you built custom on BigCommerce needs a Shopify equivalent. Sometimes that equivalent is a Shopify app you can install in a day, and sometimes it is a custom build.
   
   
3. Design scope. Adopting an existing Shopify theme with minor changes is fast. A custom Shopify Plus theme plus a brand refresh or strategic overhaul can add both design and development time.
   
   
4. Third-party integrations. ERP, 3PL, subscription tools, payment processors, loyalty programs, and email platforms are just a few of the integrations to be reconnected and tested. The list is usually longer than brands think.
   
   
5. Content and SEO scope. A clean redirect map with content rewrites on a few key pages is one project, while intensive copy changes across categories, collections, and top-selling products is another. 

1. Content and design branding strategy. If you have a recent visual brand strategy and content strategy that can lead the way, your migration project can skip straight to data and development. If your brand needs full-service branding, it can add time to your project.
   
   
2. Decision-maker availability. A migration with one empowered decision-maker on the client side moves twice as fast as one with three stakeholders who all need to approve every choice.
   
   

What slows BigCommerce to Shopify migrations down

We’ve supported over 200+ ecommerce brands since 1996, and during that time, we’ve identified the biggest speed bumps to any migration project. While our priority is always delivering on the anticipated timeline, there are a few things that can make that difficult:

• Late asset delivery. Brand photography, copy, or design files promised in week 2 that arrive in week 6. Every week of delay can add friction to timelines.
• Mid-project scope changes. A new requirement halfway through that was not in the original brief. While some scope creep or changes might be worth it, changes to the project always add time.
• Subscription or wholesale logic. Wine clubs, subscription boxes, or B2B price tiers add development or engineering complexities. For example, if you sell alcohol DTC and currently use Vinoshipper, it could push beyond a basic data migration to a longer timeline.
• Approval bottlenecks. Three stakeholders, two of whom are rarely available. Approvals get pushed back or stakeholders don’t see eye-to-eye, and this adds time to any project.

How to compress your Shopify migration timeline

You control most of the variables that decide how quickly you can migrate to Shopify from BigCommerce. Understanding the process, what types of project you are undertaking, and what to expect can expedite your replatform project.

Whether you’re working with an ecommerce agency to replatform or DIY-ing a move to Shopify, these pre-migration steps can make things go faster and smoother:

• Audit your assets. Pull your current product photography, brand fonts, brand colors, logo files, and documentation on custom features.
• Clean your catalog. Fix product titles, variant names, and category structures on BigCommerce before the export. Cleaner data in means cleaner data out.
• Name one decision-maker. If you’re working with a developer or agency, choose the person who can approve design, copy, and functional decisions on behalf of the brand. The migration will move at the speed of their calendar.
• Inventory your integrations honestly. List every tool currently connected to BigCommerce, including the ones the marketing team uses without telling anyone. Surprises here cost weeks.
• Commit to your design scope before kickoff. A mid-project pivot from "lift and shift" to "full redesign" is the most expensive change you can make.

A focused team with prepared client materials and can likely complete a Full Service migration in 8-12 weeks.

BigCommerce to Shopify Migration FAQs

Can you migrate from BigCommerce to Shopify in under a month?

Yes, if scope is limited. A data-only migration with no redesign, a clean catalog under 500 SKUs, and a short integration list can run in as little as 5 weeks, while still preserving SEO and CRO. QA, redirect testing, and integration validation each need real time.

What is the fastest BigCommerce to Shopify migration possible?

Realistically, about 3-5 weeks for a small store with a clean catalog and minimal customization. We do not recommend going faster than that. Most migration regrets come from skipping QA or not preparing data for a clean move.

Does a Shopify Plus migration take longer?

Often yes, because Shopify Plus migrations usually involve features that are the reason a brand is on Plus in the first place: B2B, expansion stores, custom checkout, or wholesale. The migration takes longer because the build is bigger.

Can we keep selling on BigCommerce during the migration?

Yes. Your BigCommerce store stays live until the day you switch DNS to Shopify. Sales continue on BigCommerce throughout the build, and the switch happens at launch.

Why do some Shopify migration agencies quote six months or more?

Usually one of three reasons: very large catalogs (10,000+ SKUs), heavily custom B2B or wholesale setups, or a full ERP and operations rebuild bundled into the migration. If your project is none of those and you are seeing a 6-month quote, ask what specifically is taking that long. 

Get a custom timeline for your migration

Every BigCommerce to Shopify migration is different. Book a free 30-minute consultation with our team. We will walk through your current BigCommerce setup, ask about your goals and constraints, and send you a custom timeline and price quote for your project within a week of the call. No obligation. Book a free consultation with Whirlwind Ecommerce.