Shopify Plus Migration Cost in 2026: A Real Breakdown by Project Size

Shopify Plus migrations come in at $5K, $50K, or $250K+ depending on what you're migrating, from where, and how custom your store is. The variance frustrates merchants — agency quotes feel random unless you know what's actually being priced.

This guide breaks down the cost drivers in 2026, gives you realistic ranges by project size, and surfaces the hidden line items that don't usually show up in the first quote. By the end, you'll know roughly what to budget for your store and what to push back on if a quote feels off.

Quick Answer: Migration Cost by Project Size#

These ranges reflect what we've seen agencies in the Shopify Partners ecosystem charge in 2026. The exact quote you get will depend heavily on your platform-of-origin and integration complexity — keep reading for the line items that move the number up or down.

What Actually Drives the Cost#

There are six factors that move a Shopify Plus migration quote. Understanding each one helps you read between the lines of any agency proposal.

1. SKU count and variant complexity#

The data layer is rarely the most expensive part of a migration, but it scales linearly with SKU count.

• Up to 1,000 SKUs: 2-4 days of data engineering. Most agencies fold this into the base price.
• 1,000-10,000 SKUs: 1-2 weeks. Variant data needs validation — Shopify's variant model is strict (max 100 variants per product, max 3 option types) and platforms like Magento allow looser combinations.
• 10,000-100,000 SKUs: 2-4 weeks of data engineering, often with custom mapping scripts and a metafield strategy for what doesn't fit Shopify's native schema.
• 100,000+ SKUs: A full sub-project, usually with a dedicated data engineer for 1-2 months.

The hidden complexity is rarely the count itself — it's how cleanly the source platform's product schema maps to Shopify's. WooCommerce's flexible attributes don't have a native Shopify equivalent for some patterns, so you'll either lose data or build a metafield workaround.

2. Source platform#

The platform you're migrating from changes the quote more than most merchants realize:

• WooCommerce → Shopify: Cleanest mapping. WooCommerce REST API is well-documented, product/order data exports cleanly. Typical multiplier: 1.5-2x base.
• Magento Open Source (M2) → Shopify: Medium complexity. Magento's catalog flexibility means custom-attribute mapping work. Multiplier: 2-2.5x.
• Magento Commerce → Plus: Highest complexity. B2B features, custom checkouts, complex multi-store logic. Multiplier: 3-4x base.
• BigCommerce → Shopify: Simple data migration (similar product model). Theme rebuild often dominates the cost.
• Squarespace / Wix / Webflow → Shopify: Trivial data migration (small catalogs typical), but theme is from-scratch. Often the cheapest project type.
• Salesforce Commerce Cloud → Plus: Always enterprise-tier. Expect 6-figure projects.

3. Theme rebuild scope#

Your migration cost will swing wildly based on what you do with the storefront:

• Use a Shopify Theme Store theme as-is: Save $2,000-5,000. Quick launch, limited customization.
• Customize a Shopify theme: $3,000-8,000 for typical brand customizations on a Dawn or Spotlight base.
• Build a custom OS 2.0 theme from scratch: $8,000-25,000 depending on page-template count and design complexity.
• Build a headless storefront on Hydrogen: $15,000-60,000 for a single storefront, more for multi-region.

A common cost-control move: launch on a Theme Store theme + customize, then upgrade to custom theme in year 2 once you have data on what's converting.

4. Integration complexity#

Every integration is a separate scope item:

• Email platform (Klaviyo / Mailchimp / Postscript): $500-2,000 to migrate templates + flows.
• ERP / OMS sync (NetSuite, SAP, Brightpearl): $5,000-25,000+ depending on real-time vs batch sync requirements.
• Subscription apps (Recharge, Bold, Skio): $2,000-8,000 to re-issue subscriptions and rebuild billing flows. Subscription tokens don't migrate — every customer needs a re-auth flow.
• PIM (Akeneo, Plytix): $3,000-15,000.
• Loyalty + reviews apps: $1,000-5,000 each (Yotpo, Loox, etc.).
• Custom integrations (your warehouse system, custom shipping rules): always custom-quoted, often $5,000-30,000 each.

Most agencies undercount this category in initial quotes. Push them to itemize every integration.

5. Custom checkout extensions (Plus-only)#

Shopify Plus unlocks Shopify Functions and Checkout Extensibility. If your business requires custom checkout logic (gift-with-purchase rules, custom shipping calculations, B2B-specific approval flows), this is a separate $5,000-30,000 line item depending on complexity.

Common custom-checkout work in 2026:

• Custom discount logic (Functions): $3,000-8,000
• Custom shipping rate sorting (Functions): $2,000-5,000
• Custom payment method hiding/showing rules: $1,500-4,000
• Pre-purchase / post-purchase upsells (Checkout Extensibility): $3,000-10,000
• B2B approval workflows: $5,000-25,000

6. SEO redirect mapping (the #1 hidden cost)#

If you don't preserve every old URL → new URL with proper 301 redirects, you'll lose your SEO equity overnight. We've seen stores drop 40% of organic traffic the week after a sloppy migration.

For a 2-year-old store with 500 indexed URLs, redirect mapping is a few hours of work. For a 10-year-old store with 50,000+ indexed URLs (long-tail blog content, old collection URLs, paginated archives), it's 2-3 weeks of SEO + dev work. This is often quoted as $1,500-15,000 depending on scope.

If a migration quote doesn't mention redirect mapping at all, that's a red flag. Ask explicitly.

Hidden Costs Most Quotes Don't Include#

Even thorough agencies miss some recurring costs. Build these into your budget:

Shopify Plus monthly fee#

Shopify Plus base pricing as of 2026 starts at $2,300/month USD on a 3-year commitment, or $2,500/month on a 1-year. Higher revenue tiers have variable pricing based on a percentage of GMV after a threshold (formerly known as the "0.4% of revenue over $800k/month" model — exact terms negotiated per merchant in 2026).

This isn't part of the migration cost but it's the ongoing platform fee you'll be paying.

App subscriptions#

Migrating from "free" Magento doesn't mean Shopify will be free in operations. A typical mid-market Plus store runs:

• Subscription app (Recharge): $99-499/month
• Email platform (Klaviyo): $50-1,000+/month
• Reviews (Yotpo, Loox): $25-300/month
• SEO / redirect manager: $20-50/month
• Loyalty (Smile, Yotpo): $50-500/month
• Total typical app stack: $300-3,000/month

DNS migration + downtime planning#

Cutover from old to new requires a migration window. Cheap quotes skip the playbook for this. Expect $500-2,000 in agency time for cutover planning, monitoring, and rollback prep.

Email template rebuild#

Order confirmation emails, shipping notifications, abandoned cart emails — Shopify has its own templates. Your existing branded templates need to be ported. $500-2,000 depending on how custom your existing templates are.

Tax / compliance reconfiguration#

Reconfiguring tax rules, especially for multi-region stores, is a 1-2 day project: $500-2,000.

Apps that don't migrate (rebuilt from scratch)#

Some platform-specific apps (Magento extensions, custom WooCommerce plugins) have no Shopify equivalent. You'll either find a Shopify app that covers the same need or build custom. Budget $5,000-20,000 if you have 1-2 platform-specific extensions you can't live without.

By Project Size — Detailed Breakdown#

Small SMB ($5,000-15,000) — typical 4-6 weeks#

Profile: WooCommerce or Squarespace store, under 1,000 SKUs, no subscriptions, simple shipping rules, minimal apps.

What's typically included:

• Shopify theme (Dawn or Theme Store) + brand customization
• Product + order + customer data migration (last 2-4 years)
• Up to 5,000 URL 301 redirect map
• Integration with existing Klaviyo / Mailchimp
• Standard checkout (no Plus features needed, often Standard plan is enough)
• Theme launch QA on iPhone + Android + desktop

What's typically NOT included:

• Custom apps
• Advanced redirect strategies (e.g. cleaning up URL structure)
• Subscription billing migration
• Multi-currency / multi-region
• Enterprise SLAs

Best for: New brands moving from a basic platform, established SMBs that don't yet need Plus features.

Mid-market ($15,000-50,000) — typical 6-10 weeks#

Profile: WooCommerce or Magento Open Source, 1k-10k SKUs, some subscription customers, moderately custom theme, 2-3 critical integrations.

What's typically included:

• Custom OS 2.0 theme (8-12 page templates)
• Product + order + 5+ years order history migration
• 5,000-25,000 URL redirect map
• Klaviyo migration with flow + segment rebuilds
• Recharge or similar subscription billing reconfigure (with grace-period re-auth flow)
• ERP webhook sync (basic real-time inventory, batch order push)
• Custom theme app blocks for brand-specific features
• Theme launch QA + 30-day post-launch support

Optional add-ons that push toward $50K:

• B2B / wholesale customer group setup
• Custom collection + filtering logic
• Multi-region rollout (UK, EU, US storefronts)
• Custom checkout extensions on Plus

Best for: 7-figure brands ready to move off Magento Open Source or scale beyond WooCommerce's plugin limits.

Enterprise ($50,000-250,000+) — typical 3-6 months#

Profile: Magento Commerce, Salesforce Commerce, custom-built platforms. 10k+ SKUs, multi-region, complex pricing logic, mature integrations stack.

What's typically included:

• Full custom OS 2.0 or Hydrogen storefront
• Multi-storefront architecture (one Plus org with multiple expansion stores)
• ERP integration with real-time inventory + order sync
• B2B portal with custom approval flows
• Custom Functions (discount logic, shipping rate sorting, payment method gating)
• Checkout extensions (pre-purchase upsells, post-purchase recommendations)
• 25,000+ URL redirect map with old-platform URL rewriting
• Hydrogen build with Headless CMS (Sanity, Storyblok) for content
• Performance budget compliance: Lighthouse 90+ at launch
• 90-day post-launch support + SLA

Plus the Plus monthly fee + app stack ($300-3,000/month).

Best for: Established 8-9 figure brands replatforming for the long term.

Where Most Migrations Go Wrong#

Five recurring patterns we've seen. Push your agency on each of these explicitly:

1. Skipping or under-scoping the redirect map#

The most expensive mistake. Without proper 301 redirects, organic search traffic crashes the week after launch and takes 3-9 months to recover (sometimes never). Get a list of every indexed URL via Google Search Console + Ahrefs/Semrush and confirm every one has a destination on the new store.

2. Underbudgeting variant + metafield data work#

WooCommerce's flexibility doesn't translate cleanly. Agencies optimistic about data migration often discover during implementation that 15-20% of products need manual remapping. Build 1-2 weeks of buffer.

3. Not testing checkout edge cases before launch#

Subscription customers, B2B customers, gift-card holders, customers with store credit — all break in different ways during migration. Run pre-launch testing with real customer data on a staging store.

4. Forgetting subscription token re-authorization#

Recharge / Bold / Skio subscription tokens don't migrate. Every active subscriber needs a re-auth email with a grace period (typically 14 days). Without this, you'll see a one-time spike in subscription churn the month of migration.

5. Migrating apps 1:1 instead of consolidating#

Migration is a forcing function for app cleanup. Most stores are running 5-10 apps that overlap or aren't pulling their weight. Audit, consolidate, then migrate the trimmed stack — saves $200-1,000/month in ongoing app fees.

Realistic Timelines by Project Size#

These assume a competent agency with Shopify Plus experience. First-time Plus migrators typically run 30-50% over.

Should You DIY Any of It?#

For most merchants the answer is "no" beyond a certain size. But there are reasonable middle paths:

Reasonable to DIY:

• Theme customization on a Theme Store base (if you have a designer + Liquid-comfortable dev)
• App configuration (Klaviyo, Recharge admin work)
• Email template customization
• Content writing for new pages (About, FAQ, policies)

Not reasonable to DIY:

• Data migration (the hidden complexity will burn you)
• 301 redirect mapping (SEO equity is too expensive to lose)
• Custom Function development on Plus
• Checkout extensions
• Multi-region setup

A common "hybrid" cost-reducer: the agency does data + redirects + theme architecture, and your team handles content + app config + email templates. Saves 20-30% on the agency fee.

What This Means for Your Budget#

If you're comparing quotes:

1. Get 3 itemized quotes — refuse "all-in" lump sums
2. Ask explicitly about redirect map scope
3. Ask explicitly about checkout testing scope
4. Confirm post-launch support window (30 vs 60 vs 90 days)
5. Get the agency's Plus track record (how many Plus launches in the last 18 months?)

If you're sizing the project:

• Use the table at the top of this article as your starting bracket
• Add 20-30% buffer for unknowns
• Budget the first 90 days of post-launch fixes separately ($2,000-10,000)

We do Shopify migrations at Xpertshire, and we publish detailed case studies showing the actual scope of past projects — including a WooCommerce → Shopify Plus migration we shipped for Stride Athletics (2,800 SKUs, 4 years of order history, zero traffic loss the week after launch).

If you'd like a no-pitch read of your specific migration scope, book a free 15-min scoping call — we'll walk through your platform-of-origin, integration list, and SEO requirements, and tell you what a realistic budget looks like for your store specifically.