Ecommerce Migration Costs: The Complete Guide
TL;DR
- eCommerce migration costs in 2026 range from around $5,000 for small SaaS-to-SaaS moves to $500,000 or more for enterprise Adobe Commerce and composable rebuilds.
- Scope is the price driver, not the platform.
- SEO migration is the most under-budgeted line item. Traffic drops of 15 to 30 percent are common when redirect mapping is incomplete.
- Migration is typically only 20 to 40 percent of your true three-year cost of ownership.
- Before signing a quote, verify that redirect mapping, order history transfer, checkout testing, and post-launch support are all inside the scope.
Migrating an eCommerce platform is one of the biggest decisions a growing brand will make, and the pricing conversation is where most projects quietly go wrong. Quotes range from a few thousand dollars to half a million or more, and the difference is rarely the platform. It is what sits inside the scope.
This guide breaks down real eCommerce migration costs in 2026 by store size, source platform, timeline, and hidden line items, and gives you a formula to build your own budget estimate before you talk to any vendor. All ranges are drawn from CommerceShop’s project experience across 1,000+ online stores since 2009.
How much does an eCommerce migration cost in 2026?
An eCommerce migration in 2026 typically costs between $5,000 and $500,000 or more, with most mid-market projects landing between $30,000 and $150,000. The final price is driven by catalog size, custom functionality, integrations, and SEO complexity, not by the destination platform.
| Store tier | SKU range | Typical cost range |
|---|---|---|
| Small | Under 1,000 | $5,000 to $25,000 |
| Mid-market | 1,000 to 10,000 | $30,000 to $150,000 |
| Enterprise | 10,000+ | $150,000 to $500,000+ |
| B2B and ERP-integrated | Any | $80,000 to $400,000+ |
For scoped pricing on your specific store, request a free migration assessment.
How much does eCommerce migration cost by store size?
Small stores (under 1,000 SKUs)
Small stores run $5,000 to $25,000. Template-based themes, standard data migration tools, and off-the-shelf app replacements keep costs predictable.
Mid-market stores (1,000 to 10,000 SKUs)
Mid-market migrations run $30,000 to $150,000. Custom themes, multiple app replacements, ERP or CRM connections, and detailed SEO migration all add real cost.
Enterprise stores (10,000+ SKUs)
Enterprise migrations run $150,000 to $500,000 or more. Architecture planning, complex data models, custom business logic, and heavy integration testing dominate the budget.
B2B manufacturers and distributors
B2B migrations run $80,000 to $400,000 or more regardless of catalog size. Complexity comes from multi-tier pricing, quote-to-order workflows, dealer channels, and ERP connectivity. This is a core CommerceShop specialization.
How much does migration cost by source platform?
The source platform sets the extraction complexity, which drives cost more than the destination platform does.
| Migration path | Typical cost range |
|---|---|
| WooCommerce to Shopify Plus | $10,000 to $60,000 |
| Magento (Adobe Commerce) to Shopify Plus | $30,000 to $250,000 |
| Magento to BigCommerce | $40,000 to $200,000 |
| Salesforce Commerce Cloud to Shopify Plus | $150,000 to $500,000+ |
| Wix or Squarespace to Shopify | $5,000 to $20,000 |
| Custom or legacy platform to any destination | $50,000 to $400,000+ |
| Monolith to composable or headless | $200,000 to $2,000,000+ |
Legacy platforms without clean export APIs cost more because they require custom middleware. Highly customized Adobe Commerce stores with deep B2B logic sit at the top of the range.
How long does an eCommerce migration take?
An eCommerce migration takes anywhere from two weeks to twelve months, with most mid-market projects completing in eight to twenty weeks. Timeline is driven by the same factors as cost.
Typical delivery windows:
- Small stores under 1,000 SKUs: 2 to 6 weeks
- Mid-market 1,000 to 10,000 SKUs: 8 to 20 weeks
- Enterprise 10,000+ SKUs: 4 to 9 months
- B2B with ERP integration: 6 to 12 months
The biggest delay factor is undocumented custom functionality. Every hidden business rule or third-party integration that surfaces mid-project can add two to four weeks. Front-load discovery and every timeline shortens.
What hidden costs should you budget for?
The headline quote is rarely the final number. Every mid-market migration should carry a contingency for the following:
- Data cleanup and standardization: removing duplicates and standardizing product attributes before migration. Typical cost: $3,000 to $12,000.
- Content recreation: landing pages and rich media that do not migrate cleanly. Budget 10 to 20 percent of the base cost.
- App and extension re-licensing: new subscriptions for replacement apps. Ongoing cost: $500 to $3,000 per month.
- Team training and change management: platform onboarding for merchandising, operations, and support. Typical cost: $2,000 to $8,000.
- Post-launch support: 30 to 60 days of stabilization to catch issues real customers surface. Typical budget: $5,000 to $25,000.
- Rollback plan: a documented path back to the source platform if launch cannot be fixed in 72 hours. Add $3,000 to $10,000.
Skipping any of these does not save money. It moves the cost to a more painful line item after launch.
Will migration hurt your SEO and AI search visibility?
Migration will hurt SEO only if redirect mapping and metadata are handled poorly. Incomplete 301 redirects can cause a 15 to 30 percent organic traffic drop in the first 90 days, and recovering that traffic often costs more than the migration itself.
A proper SEO migration line item should include a complete URL inventory, 301 redirect mapping for every indexed URL, canonical and metadata transfer, internal link updates, sitemap regeneration, and 60 to 90 days of post-launch monitoring. Expect this to add $8,000 to $30,000 to a mid-market scope.
In 2026, migration also affects visibility inside AI answer engines. URL changes, schema regression, and entity drift can silently kill your citations across ChatGPT, Perplexity, and Google AI Overviews, and these losses do not show up in Google Search Console. Preserving AI visibility during migration is a new line item most agencies do not price yet, and it is a core part of CommerceShop’s Generative Engine Optimization service.
What is the true three-year cost of ownership?
Migration is only the first payment. Over three years, the platform license, agency retainer, apps, hosting, and integrations typically add up to two to five times the migration budget itself.
For a mid-market brand moving from self-hosted Magento to Shopify Plus, the three-year TCO usually looks like:
- Migration: $60,000 to $150,000 (year one only)
- Shopify Plus platform fee: roughly $30,000 per year
- Apps and integrations: $12,000 to $36,000 per year
- Agency retainer for optimization, CRO, and GEO: $60,000 to $180,000 per year
The upfront migration is often only 20 to 40 percent of what you actually spend over three years. Compare vendors on three-year cost, not year-one cost.
How can you estimate your eCommerce migration budget?
Use this formula to build a working estimate before you request quotes:
Estimated budget = Discovery + Data migration + Design + Development + Integrations + SEO + QA + Training + Launch support + Contingency
Classify each component as low, medium, or high complexity. A store with clean data and two standard integrations may stay in the lower range across most components. A store with customer-specific pricing, several custom integrations, multiple markets, and thousands of indexed URLs should be treated as high complexity across the board.
Working ranges for a mid-market build:
| Component | Low complexity | High complexity |
|---|---|---|
| Discovery | $2,000 | $10,000 |
| Data migration | $3,000 | $20,000 |
| Design | $5,000 | $40,000 |
| Development | $10,000 | $80,000 |
| Integrations | $5,000 | $60,000 |
| SEO migration | $8,000 | $30,000 |
| QA and testing | $3,000 | $20,000 |
| Training | $2,000 | $8,000 |
| Launch support | $5,000 | $25,000 |
Add a 10 to 15 percent contingency on the total.
When you request quotes, ask each provider to separate required launch work from optional enhancements. Optional enhancements should sit as a separate line, not bundled into the base cost. This is the single fastest way to make competing quotes actually comparable.
How do you choose the right eCommerce migration partner?
The right migration partner protects revenue during transition, not just data. Use these five criteria before signing:
- Platform certification. Shopify, BigCommerce, Adobe, and Google partner status validates real training.
- Similar project experience. Ask for three case studies at your store size and complexity, not their biggest logos.
- Explicit SEO scope. Redirect mapping, canonicals, and metadata transfer should be named line items in the quote, not assumed.
- Post-launch support and rollback protocol. Confirm 30 to 60 days of stabilization is inside the price and a documented rollback path exists.
- Revenue-first reporting. Any partner unwilling to tie success metrics to revenue outcomes is optimizing for the wrong thing.
CommerceShop holds certified partner status across Shopify Plus, BigCommerce, Adobe Commerce, Google, and Meta.
How can you reduce eCommerce migration costs?
Four moves cut cost without cutting quality:
- Clean the catalog before migration. Every duplicate or obsolete product multiplies validation time.
- Prioritize ruthlessly. Do not migrate historical data or low-value customizations that no one uses.
- Phase the launch. Ship the essential feature set first, then layer secondary functionality over the next 60 to 90 days.
- Prepare access and documentation early. Missing credentials and undocumented integrations are the top two causes of scope creep and budget overrun.
What are the Common eCommerce migration budgeting mistakes?
Six mistakes drain more migration budgets than any others:
- Choosing the lowest quote. Missing scope items surface later as change orders at two times the cost.
- Skipping the SEO migration line. A $10,000 SEO investment often prevents $30,000 or more in monthly organic revenue loss after launch.
- Underestimating content recreation. Landing pages, custom layouts, and rich media rarely migrate cleanly and usually need to be rebuilt.
- Excluding post-launch support from the quote. The first 30 days always surface issues real customers find that QA missed.
- Migrating unnecessary historical data. Every duplicate SKU and inactive customer inflates validation cost with no return.
- Bundling optional enhancements into the base quote. Insist on separate line items so you can defer non-essential work without renegotiating the whole project.
What happens in the first 90 days after migration?
Migration is not finished at go-live. The first 90 days determine whether the project delivers ROI or leaks revenue.
Days 1 to 7. Monitor checkout, payment gateways, top 20 landing pages, and 404 errors on an hourly cadence. Any redirect miss should be caught and fixed inside 24 hours. Expect one to three minor bug fixes on day one.
Days 8 to 30. Real customer behavior surfaces edge cases that QA never caught. Watch conversion rate, cart abandonment, and support ticket volume against pre-migration baselines. Friction usually appears in mobile checkout and account creation flows.
Days 31 to 90. Google recrawls and re-ranks the new URL structure. Organic traffic typically dips 5 to 15 percent in weeks two to six, then recovers by week ten when the SEO scope was executed properly. AI answer engines take three to five business days to notice new URLs and up to 60 days to fully re-cite. Track mention rate and citation rate across ChatGPT, Perplexity, and Google AI Overviews during this window.
This is why post-launch support is a real budget line, not an optional add-on.
Ready to scope your eCommerce migration?
At CommerceShop, we have delivered eCommerce migrations across Shopify Plus, BigCommerce, Adobe Commerce, and WooCommerce for over 1,000 online stores since 2009, contributing to more than $1 billion in cumulative client revenue.
If you are evaluating a platform move, we can give you a scoped assessment covering data migration, SEO preservation, AI search protection, and a realistic three-year TCO.
Request a free migration assessment
Frequently Asked Questions
Can my current store stay live during migration?
Yes. Professional migrations use a parallel staging environment where the new platform is built and tested while the current store keeps operating. The cutover takes minutes rather than days, and customers experience zero downtime when DNS switching is planned properly.
What happens to my domain and business email during migration?
Your domain does not move. DNS records are updated to point to the new platform during a low-traffic window. Business email keeps working because MX records are handled independently. Plan a 24 to 48 hour DNS propagation window as a safety buffer.
Should I hire a freelancer, an agency, or migrate in-house?
Freelancers work for small stores under 1,000 SKUs with no custom logic. Agencies are the right choice for mid-market and enterprise migrations because they carry platform certification, SEO capability, and post-launch support. In-house only makes sense with full-time platform engineering staff, which most brands under $50M in revenue do not have.
What is the difference between eCommerce migration and replatforming?
Migration moves data and functionality with the storefront largely intact. Replatforming rethinks the storefront, catalog architecture, and customer journey during the move. Replatforming costs more but delivers stronger revenue outcomes because it fixes structural problems, not just infrastructure.
Do customer accounts, order history, and product reviews survive migration?
Customer accounts and order history can be migrated with the right scope, but passwords cannot move and customers must reset them on first login. Product reviews require a separate app-to-app migration that most agencies quote separately. Confirm all three are inside the scope before signing.
When is the best time of year to migrate an eCommerce store?
January through March and July through September are the safest windows. Avoid launching within 60 days of Black Friday, Cyber Monday, or your seasonal peak. Launching during overlapping peak traffic multiplies revenue risk.
A detailed discovery process gives you a more reliable estimate than a flat headline price. It also separates essential launch work from improvements that can follow after the new store is stable.
