eCommerce Migration Checklist: Move With No Downtime

An eCommerce migration checklist that avoids losses rests on one principle: the old store keeps selling until the new store proves it is ready with real orders. Between start and finish there are seven phases: audit, data freeze, parallel build, test orders, a DNS switch window, a rollback plan and post-launch monitoring. This is the checklist we use on every migration to Shopify.

Phase one: audit and scope

Before any technical work, we write a short document answering specific questions, because most losses in migration projects come from assumptions nobody wrote down:

• What moves? Active products only or the whole catalog? How many years of orders? All customers or those who bought within a set period?
• What does daily selling depend on? Payment gateways, couriers, the accounting system or ERP, tax invoicing, apps.
• Where does traffic come from? The top 100 pages in Search Console and the active campaigns on Meta and Google.
• Who owns each decision? One person approves the data freeze and one person approves the switch.

Baseline numbers are recorded before the move (daily orders, conversion rate, organic traffic) because they are the reference against which the migration’s outcome is measured.

Phase two: the data freeze

The data freeze is an agreed date after which no edits are made to products, prices, images or content in the old store. After it, one final export is taken and moved to Shopify. What is not frozen: new orders and customers, which keep flowing into the old store and are moved as a final batch during the switch window.

Frozen	Not frozen
Products, options and images	New orders
Prices and compare-at prices	New customer registrations
Collections, pages and blog posts	Quantities (synced at the end)
Discount codes	Customer service messages

A practical rule: do not freeze data until the new store is ready to receive it within days, otherwise the freeze drags on and disrupts the business.

Phase three: the parallel build

The Shopify store is built on a password-protected temporary address, the cleaned catalog is imported, and everything that cannot be imported is completed: theme, menus, policy pages, payments, shipping, taxes, apps replacing old plugins, and tracking. The URL map and 301 redirects described in keep SEO rankings when migrating to Shopify are built in this phase too.

Tracking is installed now, not after launch: Meta Pixel with the Conversions API, GA4, Google Ads conversion tracking and Merchant Center. The detailed steps are in Meta Pixel and Conversions API setup for Shopify.

Phase four: test orders

No domain is switched before this list passes completely:

1. A real order through every payment method (card, cash on delivery, any local gateway), then refunded.
2. An order from mobile and from desktop, in Arabic and English if the store is bilingual.
3. Confirmation that the order appeared in the Shopify admin and reached the accounting or shipping system if connected.
4. Confirmation that the test order appeared in Pixel and GA4 events with the correct value.
5. The order confirmation arrived by email and by WhatsApp if enabled.
6. A review of a 50-product sample: images, prices, options, quantities, descriptions.
7. A check of the top 100 redirects on the temporary address.

The full pre-launch checklist, whether for a migration or a new store, is in the Shopify store launch checklist.

Phase five: the DNS switch window

We choose the time with the least traffic, usually a mid-week night away from peak seasons. The sequence inside the window:

Step	Approximate timing	Note
Put the old store into maintenance mode	Minute 0	Clear message for visitors
Export the final batch of orders and customers	First 30 to 60 minutes	Everything since the last transfer
Import into Shopify and sync quantities	Immediately after	Verify counts
Change DNS records to Shopify	After the import completes	Propagation can take time
Verify SSL and the primary domain	After propagation	Remove password protection
Place a real order on the live domain	As soon as confirmed	With a real payment
Submit the sitemap in Search Console	Same hour	And request indexing of top pages

Lowering the DNS TTL a day before the window makes propagation faster and shortens the maintenance period.

Phase six: the rollback plan

A rollback plan is not a sign that failure is expected; it is the condition for staying calm during the switch. It has three parts: the old store keeps running on a temporary address and is not shut down for weeks, a copy of the old DNS records is saved so they can be restored within minutes, and a written procedure exists for manually moving any orders that reached the new store if we have to go back. We define in advance what triggers a rollback (such as payment failing on every method) and what gets fixed in place (such as a missing image).

Phase seven: post-launch monitoring

For the first two weeks we monitor daily:

• Orders: the count against the pre-migration baseline, and the share of failed payments.
• Tracking: Pixel and GA4 purchases matched against Shopify orders.
• SEO: 404 errors in Search Console, redirects working, indexing progress.
• Campaigns: ads continuing on the new URLs and the catalog refreshing in Merchant Center.
• Customers: login complaints (because passwords do not transfer) and activation emails.

After two weeks, monitoring moves to weekly until day 90, when the numbers are compared with the baseline and the project is formally closed.

From our experience

Every migration we run through our Shopify migration service follows a written plan, a data freeze and a monitoring period after launch. For Luliz the challenge was a slow, expensive-to-maintain Magento store with thousands of products and an order history that had to be preserved; with the same plan (freeze, transfer of products, customers and orders, 301 redirects, reconnecting Merchant Center, GA4 and the Pixel) the move was completed in summer 2025 with no lost products or rankings, and campaigns running profitably since launch. The Magento specifics are in migrate Magento to Shopify.

Conclusion

A store migration without losses is not luck but order: a written audit, a dated data freeze, a parallel build with tracking ready, test orders with real payments, a quiet switch window, a ready rollback plan, and daily then weekly monitoring until day 90. With this checklist, selling never stops and the new store comes out stronger than the old one.

Send us your store link on WhatsApp and we will send you an estimate of the plan’s phases and timeline based on your catalog size.