Shopify Migration: How Does It Work and How Long Does It Take?

The decision to switch ecommerce platforms usually comes when the current store can no longer keep up with the company's growth. The problem may lie in day-to-day operations, integrations, expansion into new markets or extending the store's design and features. Choosing Shopify sets the direction, but the whole migration still stands between that decision and the first sale.

Its scope depends on the scale of the business. For a small store, configuring Shopify, choosing a theme and moving the catalogue may be enough. In a larger organisation, historical orders, customer accounts, integrations, analytics and search visibility come into play.

A successful migration does not start with an import. First you need to design the architecture, features and data structure of the new store, and only then prepare the migration, build the solution, test it and plan the cutover. Below we describe the process the way we run it at Hyper Effekt. It is not a complete guide to moving a store on your own, although the stages and decisions described here will also be useful if you are planning to handle the migration yourself.

What does migrating to Shopify really involve?

You cannot simply copy a theme or frontend from another platform to Shopify. The new store can look similar, but the frontend has to be rebuilt from scratch in line with Shopify's architecture.

The same goes for features. A mechanism that used to work as a module or part of a custom system may have an equivalent in standard Shopify, or it may need an app or a solution built specifically for the store. Not every feature can be recreated in exactly the same form. Often there is no need to. A simpler version can meet the business need just as well and be easier to maintain.

Data rarely moves across one to one either. Products, customers and orders have to be adapted to Shopify's data model. In our experience, it is preparing and transforming the data, rather than running the import itself, that is most often underestimated.

Can you migrate a store to Shopify yourself?

Yes, if the scope is small. The owner of a small store can configure Shopify, choose an off-the-shelf theme and import products from a CSV file. Shopify provides migration documentation, sample import files and a checklist of tasks to complete before you start selling.

The risk grows with a large catalogue, multiple languages, custom discounts and connections to an ERP, a PIM or a warehouse system. At that point, a single decision can affect several areas at once. The way product variants are structured affects the import, how products are presented, filtering and integrations. A new category hierarchy changes the navigation and URLs. And if the data arrives late, test imports, testing and the launch date all slip.

Projects like these need several specialisms to work together and a clear division of responsibilities. On our page about working with a Shopify agency, we compare this model with relying on an in-house team or a freelancer.

How long does a Shopify migration take?

In our projects, a migration usually takes 3 to 6 months. The exact timeline depends on how complex the current store is and on how involved the client's team is. Decisions, assets and sign-offs on the client side affect the schedule just as much as the implementation work.

A finished store does not always go live as soon as the work is done. Sometimes we postpone the launch to a better moment, so that the cutover does not fall, for example, in the middle of peak season or a major campaign.

Auditing the current store and designing the solution architecture

We start planning a migration by getting to know the company, its current store and the problem the platform change is meant to solve. We analyse sales volume, the catalogue, markets, features, integrations, analytics data and the limitations of the current system.

If the scope is clear enough, we can give an initial range at this stage. How such a ballpark figure differs from a detailed estimate is explained in our article on how much a Shopify or Shopify Plus implementation costs. To work out the cost of running the store after launch, from the subscription to payment fees, see our article on Shopify TCO.

The next stage covers requirements analysis, ecommerce workshops and a plan with an estimate and a schedule. In the workshops, the expected outcome turns into a solution that can be delivered on Shopify. They also bring out dependencies that are not visible on the initial feature list.

Let's say the company wants to keep the catalogue filtering customers know from the current store. First you need to establish which fields the filters use, whether the information is complete and where it will be stored after the migration. Only then can you plan the product data structure, the Shopify configuration and the page design.

The result of this work is the ecommerce architecture and an implementation plan. These documents define the target store model, the scope of the migration and the responsibilities of each team.

UX design and specification

Switching platforms does not require a new store design. You can keep your existing design, even though the frontend has to be rebuilt anyway. It is a good opportunity to fix the things that get in the way of purchases or of growing the catalogue.

In most of our migrations, we are also responsible for UX. We usually start with the product page. Once its design is approved, we move on to the homepage and the remaining views and features.

During the audit, we check which features are still needed, which business needs they serve and how to deliver them on Shopify. A feature that comes as standard with the platform, or a proven app, usually creates fewer dependencies than a custom mechanism. A custom solution makes sense when simpler options cannot meet an important requirement. We record the decisions on views, interactions and features in a specification, which then forms the basis for implementation and testing.

This is how we worked on Gabriella's migration from AtomStore to Shopify Plus. We combined the platform change with designing a new storefront interface and reorganising how the extensive catalogue is presented. Decisions on navigation, categorisation and filtering shaped the store's design, the data model, the URL structure and the scope of testing. Gabriella now has a refreshed store free of technical debt, one that can keep growing with the brand.

Theme development, configuration and integrations

Once the UX designs are approved, the work runs on two tracks. Developers build or customise the Shopify theme, implementing views, sections and interactions. At the same time, the platform, payments, shipping, markets, taxes, apps and integrations are being configured.

The decisions made during planning determine how the theme is built and the store configured. The product page needs an agreed data structure, delivery information may depend on the market or warehouse, and a feature visible on the frontend may need a connection to an external system.

This is also the stage for test imports. A representative batch of data quickly reveals incorrect mapping, missing values and assumptions that will not hold up against the full catalogue.

How do we prepare and move the data?

A migration can cover products, customers, historical orders, discount codes, blog posts, page content, reviews and gift cards. For each type of data, four things need to be agreed: the source, the target structure in Shopify, the migration method and the acceptance criteria.

We most often work with CSV files and the Matrixify app. If the source platform has a suitable API, we pull the data directly from it. We use Python scripts to clean and transform information. We choose the tool based on the data and on what can be exported from the old system.

The name of the source platform matters less than access to complete and consistent information. Systems that do not allow a full export cause the most trouble. Data that is only available in the admin panel or in an inconsistent file needs extra work.

We leave the source export untouched. We transform the data on copies, so that the same operations can be repeated. We run the entire data migration in a secure environment that protects the data from unauthorised access and accidental disclosure. Before the full migration, we test a sample. After the import, we compare record counts and check selected products, customer accounts and orders.

Products: changing the structure is the biggest challenge

In an established store, a product is much more than a name, a price and a description. It has variants, images, specifications, logistics information, links to collections and data used by filters and integrations.

If the old system stores colours and sizes as separate products and in Shopify they are to become variants, you need to build new relationships, define identifiers and check the inventory system. Information held in a single description may need to be split into separate fields or metafields.

These decisions affect how products are presented, filtering, page URLs and analytics. That is why the structure of variants and fields has to be agreed before the full import. Changing it midway means redoing work.

Customer data can be migrated, but passwords cannot

Customer profiles can be imported, but passwords from the old store cannot. The old platform stores them in a form that cannot be transferred to or read by Shopify.

New customer accounts in Shopify allow customers to log in without a password. The customer enters their email address and receives a code. Once their profile has been imported, they can log in with the associated address and see their account details. Before launch, you need to prepare communication for customers and instructions for the customer service team, and test the first login.

Historical orders require compromises

Every order contains products, prices, discounts, taxes, shipping, payment and buyer details. Order history can be moved to Shopify through apps or the API, but orders may be recorded differently than on the previous platform.

In our experience, it is not always possible to recreate every element in identical form. You need to keep what customers need to recognise their purchases and what the store team needs to handle them. We agree the acceptance criteria before migrating the full history. That way everyone knows which differences are acceptable and which indicate an error.

Discounts and content have their limits too

A discount rule from the previous system may not have a direct equivalent in Shopify. Codes need to be adapted to what the platform, an app or a solution built on Shopify Functions can do. Before migrating, it is also worth checking which discounts are still active and actually needed.

Moving blog posts and pages is not just about the text. There are also images, formatting, metadata, links between pieces of content and new URLs. This is where work on data, the frontend and SEO comes together.

SEO and analytics before launch

Shopify uses fixed paths, including /products/ for products and /collections/ for collections. If the old store has a different structure, you need a map of old and new URLs and permanent 301 redirects.

Every important old URL should lead to the corresponding new page. If content has been removed or several pages have been merged, the destination has to be chosen case by case. Redirecting all missing URLs to the homepage does not preserve what they meant. Internal links, canonical URLs and the sitemap also need updating, and indexing of the production site needs checking.

Google warns that after a significant site change, visibility may fluctuate for a while until Googlebot recrawls and reindexes the URLs. There is no way to guarantee that there will be no drops after a migration. Good URL mapping, correct redirects, testing and monitoring do, however, reduce that risk.

At Hyper Effekt, we are responsible for the technical implementation of the agreed structure and redirects. SEO is not our specialism, so we recommend bringing in an agency or specialist with migration experience as early as the information architecture work.

In parallel, you need to set up analytics and the Google and Meta tools the store uses. We test their configuration before launch and, after the cutover, check that they record real transactions and key events.

Testing must cover complete purchase journeys

We test the key journeys from entering the store to order confirmation, as well as the tasks the customer service team will carry out later. The scope of the scenarios follows from the sales model. In a store operating in several markets, we check, among other things:

• domestic and international purchases, with the correct prices, taxes and currencies,

• consumer and business purchases with invoice details,

• payment methods, shipping, discount codes and free shipping rules,

• products that are in stock, out of stock and on promotion,

• emails, customer login and access to order history,

• passing orders to external systems.

The critical journeys have to be tested in every language version and in every market the store serves.

Launch requires a controlled cutover

Throughout the preparations, the old store keeps taking orders while the new one runs in parallel on a temporary domain. The data therefore keeps changing until the very last moment. After the main import, you need to set a point at which changes are frozen and decide how to bring across orders, customers and other records created after it.

We schedule the domain switch for the time of lowest traffic, which, contrary to what you might think, does not always fall at night. The decision should take into account analytics data and the availability of the people needed to run the checks. If the launch requires a short pause in sales, you need to decide in advance how long it will last and how customers will be informed.

The launch plan sets out the order of tasks, responsibilities and how to respond to errors. After the cutover, we check the store, the key redirects, payments, integrations and analytics. We also keep an eye on customer reports and problems that only show up under real traffic.

Pre-launch checklist

Before switching the domain, it is worth confirming that:

• the target model for products, variants and fields has been approved,

• the full import has finished without unexplained errors and the data has been checked on representative samples,

• the team knows how customers will log in after the migration,

• features, integrations, payments, shipping, taxes and markets work within the agreed scope,

• the key purchase scenarios have passed testing,

• the URL map and 301 redirects are ready and tested,

• analytics and the required Google and Meta tools are collecting the right events,

• the final data import, the cutover sequence and the people responsible for each step have been agreed,

• monitoring of sales, errors, indexing and visibility after launch has been planned.

The checklist helps you check whether the store is ready, but it will not replace a migration plan. The scope of the checks follows from the architecture of the specific store.

If you are considering a migration, start by gathering information about the data, features, integrations and traffic of your current store. Based on that, you can assess what can be moved, what needs rebuilding and who is responsible for each part of the process.

At Hyper Effekt, we run store migrations to Shopify from architecture and UX to implementation, testing and launch. In the first call, we will establish whether Shopify meets your company's needs and how much work the project may involve.