Shopify Migration Guide: Moving from Another Platform Without Losing Revenue

Migrations are where revenue goes to die. SEO traffic vanishes overnight, customers can't log in, products show up incomplete, and the new store feels worse than the old one for the first month. Done well, the migration is invisible to customers and the upside compounds for years.

Here's the playbook for a clean Shopify migration.

The honest reasons to migrate

Migrate if your current platform is:

• Slow and you've already optimized everything you can.
• Limiting growth (no apps for the integrations you need, can't customize checkout, can't scale internationally).
• Expensive at your scale (Magento self-hosted with a big dev team) or scaling poorly.
• Buggy or unreliable enough to cost meaningful revenue.

Don't migrate because:

• A consultant said you should.
• You saw a competitor's nice Shopify store.
• You want a redesign — that's a redesign, not a migration.

Decide first whether the underlying business problem is the platform or something else. Most "platform problems" are actually theme, app, or operations problems.

Pre-migration checklist

Before you touch the new store:

1. Audit current SEO. Pull every URL receiving organic traffic from Search Console. This becomes your redirect map. Ignore at your peril.
2. Inventory data. All product data, customer data, order history, custom fields, metadata, attributes.
3. Map integrations. Every app, every API integration. Each must have a Shopify equivalent or a plan.
4. Review checkout customizations. Custom logic, fees, restrictions — these often surprise teams mid-migration.
5. Document promotional history. Active discount codes, gift cards, store credit balances.

Treat the audit as a paid project. It takes 1–2 weeks for a mid-size store.

Migration tools and methods

Three approaches:

Manual export/import. Free, slow, error-prone for large catalogs. Workable for stores under 100 SKUs.

Migration apps (Cart2Cart, LitExtension, Matrixify). $200–$2,000 depending on scope. Good for standard fields. Custom fields and complex catalogs require manual cleanup after.

Custom scripts/agency. $5K–$50K. Required for stores with non-standard data, multi-store consolidation, or B2B price lists.

For most $500K–$5M stores: a migration app handles 80% of the work, you spend 2–4 weeks on the remaining 20%.

SEO preservation: the highest-stakes work

This is where stores lose 30–60% of organic traffic if they get it wrong.

URL structure

Map every old URL to a new URL:

• /products/old-handle → /products/new-handle
• /category/old → /collections/new
• /blog/old-post → /blogs/news/old-post

301 redirects, not 302s

Permanent redirects pass link equity. Temporary redirects don't. Shopify's URL Redirects feature handles bulk uploads via CSV.

Watch for parameter URLs

Old platform URLs often have parameters (?sort=price, ?page=2). Decide which to redirect, which to canonicalize, and which to block via robots.txt.

Preserve titles, descriptions, headings

The on-page SEO content matters as much as the URL. If old titles, meta descriptions, and H1s ranked for terms — keep them. Rewriting at migration time is changing two variables at once.

Submit a fresh sitemap

The day after launch, submit the new sitemap in Search Console. Monitor for crawl errors daily for the first 14 days.

Customer data migration

Customer records, order history, and login credentials require special handling.

• Passwords don't migrate. Shopify will require all customers to reset on first login. Send a clear "we've moved, click to reset your password" email at launch.
• Order history can be imported as Shopify orders (with original timestamps) for customer reference. Mark them clearly so they don't trigger fulfillment.
• Loyalty points and store credit need to be exported, mapped, and imported into the new loyalty/credit app.
• Subscriber tags and segments transfer if you're already using Klaviyo. If not, this is a good migration moment to switch to Klaviyo.

Apps and integrations

Audit every app on your current platform:

• What does it do?
• What's the Shopify equivalent?
• Are settings transferable?

Common pitfalls:

• Reviews don't always transfer cleanly between apps. Use a CSV middleware or a service like Loox/Judge.me migration utilities.
• Subscription data needs careful migration. Recharge has tools; native subscriptions are harder.
• Custom-built features may not have Shopify-app equivalents. Plan for theme code or Shopify Functions work.

Theme and design

Don't migrate AND redesign in the same launch. Pick one:

Lift-and-shift first. Replicate current design as closely as possible on Shopify. Launch. Then redesign 30–90 days later.

Redesign first. Build the new design in Shopify. Migrate data into it. Launch.

The first option is safer for SEO and customer experience. The second is faster overall but adds risk.

Testing before launch

Run a parallel store for at least 2 weeks. Test:

• Every checkout flow on every device (desktop, mobile, tablet, payment methods, shipping zones, discount codes, gift cards).
• Customer account flows (login, password reset, order history view).
• Search and filtering.
• Email flows in Klaviyo (use a test customer profile).
• Inventory sync if 3PL is connected.
• Tax calculations.
• International orders if you ship globally.

Run a pilot launch — 1% of traffic, or one country, or one product category — for 24–72 hours before full cutover.

Launch day

Do it on a low-traffic day. Tuesday morning is ideal. Avoid Thursday/Friday (weekend issues), Mondays (peak traffic in some categories), and around holidays or paid campaigns.

Sequence:

1. Pause paid ads.
2. Switch DNS to new store.
3. Verify redirects fire.
4. Test a real purchase.
5. Test customer login.
6. Resume paid ads.

Have the engineer who built the migration on standby for at least 8 hours after launch.

Post-launch monitoring

Day 1–7: monitor obsessively. Search Console errors, conversion rate, abandoned cart rate, customer support tickets. Issues found in week 1 are 10x cheaper to fix than issues found in month 2.

Days 8–30: watch organic search traffic. Some dip is normal (10–20%). If you see a 40%+ drop, something is broken — usually redirects, robots.txt, or canonicalization.

Days 30–90: traffic recovers. By day 90, you should be back to or above pre-migration levels. If not, do a full SEO audit.

The 12-week timeline

• Weeks 1–2: Audit and planning.
• Weeks 3–6: Build new store, migrate data.
• Weeks 7–8: QA and testing.
• Week 9: Pilot launch.
• Week 10: Full launch.
• Weeks 11–12: Monitoring and post-launch fixes.

Migrations done in 4 weeks usually break things. Done in 12, they ship clean.

What success looks like

• Organic traffic returns to baseline within 60 days.
• Conversion rate matches or beats the old store within 30 days.
• Customer support volume returns to normal within 14 days.
• The new platform unlocks one or more capabilities that justify the entire project.

If those four things happen, the migration was worth it. If they don't, the issue was rarely the platform — and the next platform won't fix it either.