Your Magento 2 site is running. Orders are flowing. But every quarter, the total cost of ownership climbs. Security patches that take a full sprint to apply. Hosting bills that scale faster than revenue. A dev team spending 60% of their time on maintenance instead of growth initiatives. And somewhere in the back of your mind, you know the platform is aging out from under you.
The cost of staying put, per year
of your dev team’s time spent on maintenance instead of growth
total Magento platform cost per year, $10M to $50M brand
SFCC platform fees alone, on a $30M brand
Figures from the full platform cost breakdown below. The invoice is the trigger, not the frustration.
If you are on Salesforce Commerce Cloud, the calculus is different but the conclusion is the same: you are paying enterprise prices for a platform whose innovation pace has slowed to a crawl, while Shopify Plus ships major features quarterly.
This is the enterprise playbook for migrating to Shopify Plus in 2026. Not the sanitised agency pitch. The real architecture, timeline, cost, and risk profile, written for the VP of Engineering or CTO who needs to present a business case to the board.
The Real Cost of Staying Put
Before we talk about migration, let us be honest about what "doing nothing" actually costs.
Magento 2 / Adobe Commerce
Adobe Commerce (formerly Magento 2 Enterprise) carries a license fee starting at $22,000/year for brands under $1M in revenue, scaling to $125,000+ for enterprise tiers. But the license is the smallest line item. The real costs:
- Hosting: $2,000-$8,000/month for properly scaled cloud hosting (AWS, Azure, or Adobe's own cloud). Black Friday surge capacity doubles this.
- Security patching: Adobe releases security patches roughly quarterly. Each one requires a full QA cycle because Magento's extension architecture means patches can break third-party modules. Budget 40-80 hours per patch cycle.
- Developer costs: Magento 2 developers command $150-$250/hour (AU). The talent pool is shrinking as developers move to more modern stacks. Finding and retaining Magento expertise is now a recruitment problem, not just a budget problem.
- Technical debt: The average Magento 2 store we audit has 15-30 extensions, at least 4 of which are abandoned or incompatible with the current Magento version.
Conservative estimate for a $10M-$50M brand: $350,000-$600,000 per year in total platform cost (license + hosting + maintenance + dev team allocation). And that is before you build anything new.
Salesforce Commerce Cloud (SFCC)
SFCC's pricing model is revenue-share based, typically 1-3% of gross merchandise value (GMV). For a $30M brand, that is $300,000-$900,000/year in platform fees alone. Add:
- Implementation partner fees: SFCC's partner ecosystem charges premium rates ($200-$400/hour) because the platform requires specialised SFRA or PWA Kit knowledge.
- Feature velocity: Salesforce's Commerce Cloud roadmap has slowed significantly since 2023. Major features like composable storefront are still in various stages of maturity, while Shopify ships checkout extensibility, B2B, and Markets features quarterly.
- Lock-in: SFCC's proprietary controller architecture (ISML templates, pipelines/controllers) means your codebase has zero portability. Every dollar spent on customisation is a sunk cost.
Why Shopify Plus in 2026
Shopify Plus is no longer the "simple" platform that enterprise brands dismissed in 2019. The 2024-2026 roadmap has systematically closed every gap that kept large brands on legacy platforms:
- Checkout extensibility: Full programmatic control over the checkout via Shopify Functions, UI extensions, and the Checkout Branding API. The old "you cannot customise Shopify's checkout" objection is dead.
- B2B native: Company accounts, custom price lists, payment terms, and self-serve portals built into the platform. No more separate wholesale channel hacks.
- Shopify Markets: Multi-currency, multi-language, duties and taxes, all from a single store instance. International expansion without running 6 separate stores.
- 100,000+ SKU support: Combined Listings, Shopify's 2024 catalogue improvements, and the GraphQL Admin API handle product catalogues at enterprise scale.
- Infrastructure: Shopify's globally distributed CDN, 99.99% uptime SLA, and automatic scaling mean you never think about hosting again. Black Friday is Shopify's problem, not yours.
The Migration Architecture
A Shopify Plus migration is not a redesign. It is a systems architecture project. Here is how we approach it.
Phase 1: Discovery and Data Mapping (4-6 weeks)
Before writing a line of code, we map every data entity, every integration touchpoint, and every custom business rule from your current platform. This phase produces:
- Complete product data model mapping (attributes, variants, metafields structure)
- Customer data migration plan (including loyalty points, credit balances, order history)
- Integration inventory (ERP, OMS, PIM, marketing tools, custom APIs)
- Custom business logic documentation (pricing rules, shipping logic, checkout modifications)
- SEO migration plan (URL mapping, redirect strategy, structured data)
Phase 2: Platform Build (8-14 weeks)
We build the Shopify Plus store in parallel with your existing platform running. This phase includes:
- Theme architecture (or headless frontend if justified)
- Checkout customisation via Functions and UI extensions
- Integration builds (ERP, OMS, PIM connectors)
- Custom app development for any business logic that does not fit native Shopify
- B2B configuration if you run wholesale alongside DTC
Phase 3: Data Migration and UAT (3-5 weeks)
Products, customers, and historical orders migrate via Shopify's GraphQL Admin API. We run multiple test migrations before the final cutover. User acceptance testing covers every customer journey and integration flow.
Phase 4: Cutover and Hypercare (1-2 weeks)
The actual DNS switch happens in a planned maintenance window (typically off-peak, sub-2-hour downtime). We run both platforms in parallel for 48-72 hours with order routing to catch any edge cases.
Traditional Migration vs. Living Ecosystem Migration
Here is where most agencies stop. They build, they launch, they hand you a login and an invoice. Then your new Shopify Plus store begins the same slow decay that made you leave Magento in the first place.
We do not do that. Our migrations launch into a living ecosystem.
| Dimension | Traditional agency migration | Sonder living ecosystem migration |
|---|---|---|
| Post-launch monitoring | 30-day warranty period, then you are on your own | Continuous AI monitoring of performance, conversion, integration health, and security. Anomalies flagged in real-time. |
| Performance optimisation | One-time speed audit at launch | Weekly performance sweeps. Core Web Vitals tracked against competitors. Regressions caught before they cost you rankings. |
| Integration health | Works at launch, breaks silently 3 months later | Every integration endpoint monitored. Failed syncs, rate limit warnings, and schema drift caught within minutes, not days. |
| Conversion optimisation | Not included. Separate retainer. | AI surfaces conversion anomalies (checkout drop-off spikes, mobile UX regressions). Human experts action the insights weekly. |
| Platform updates | You find out about new Shopify features from Twitter | We evaluate every Shopify release against your store and implement relevant features proactively. |
| Client visibility | Monthly PDF report (if you are lucky) | Real-time dashboard showing site health score, optimisations made this week, and ROI of changes. |
Think of it this way: a traditional migration is buying a new car. A living ecosystem migration is buying a new car with a full-time mechanic who monitors every sensor, replaces parts before they fail, and upgrades the engine while you sleep.
Investment Ranges
Transparency on pricing eliminates tyre-kickers and respects your time. Here are realistic ranges for enterprise Shopify Plus migrations:
| Brand size | Migration complexity | Investment range | Timeline |
|---|---|---|---|
| $5M-$15M revenue | Standard (DTC, 1-2 integrations, standard checkout) | $120,000-$180,000 | 14-18 weeks |
| $15M-$50M revenue | Complex (DTC + B2B, ERP, custom checkout, multi-market) | $180,000-$320,000 | 18-26 weeks |
| $50M-$100M+ revenue | Enterprise (headless, multiple ERPs, custom apps, global) | $320,000-$500,000+ | 26-40 weeks |
These ranges include the migration itself plus 12 months of living ecosystem management (monitoring, optimisation, proactive upgrades). The ongoing ecosystem retainer after year one typically runs $8,000-$18,000/month depending on store complexity and integration count.
Compare this to your current platform TCO. For most brands we work with, the migration pays for itself within 14-18 months through reduced platform costs, reduced dev team overhead, and improved conversion rates from a faster, more modern storefront.
When NOT to Migrate
We are not going to pretend Shopify Plus is right for every brand. You should probably stay on your current platform if:
- Your business model requires a marketplace: If you run a multi-vendor marketplace (not just DTC + wholesale), Shopify Plus is not the right fit. Look at Mirakl or custom builds.
- You have deeply custom manufacturing or CPQ workflows: If your checkout involves a product configurator that generates custom BOMs (bill of materials), the complexity may exceed what Shopify Functions can handle today.
- You are under $3M in revenue: The investment does not justify itself at this scale. Standard Shopify or Shopify Advanced is the right answer. We have written about when Plus actually pays off.
- Your current platform is working and your TCO is reasonable: If you are genuinely happy with your Magento setup, your dev team is productive, and costs are stable, do not migrate for the sake of it. Migration has real risk and disruption cost.
The SEO Risk (and How We Eliminate It)
The number one fear we hear from CMOs considering migration: "We will lose our organic rankings." It is a legitimate concern. Done badly, a replatforming can tank organic traffic for 6-12 months.
Done properly, it should not. Our SEO migration protocol:
- Complete URL inventory: Every indexed URL on your current site is mapped to its Shopify equivalent. 301 redirects are configured before launch, not after.
- Structured data parity: All JSON-LD markup (Product, BreadcrumbList, Organization, FAQ) is replicated or improved on the new platform.
- Crawl budget protection: We submit the new sitemap to Google Search Console pre-launch and monitor crawl stats daily for the first 30 days post-migration.
- Content migration: Every page with meaningful organic traffic is migrated with content intact. We do not "consolidate" pages that rank unless there is a clear strategic reason.
- Post-launch monitoring: Our AI monitoring catches ranking drops within 48 hours, not 2 weeks. If a redirect is broken or a page is accidentally noindexed, we know immediately.
Next Steps
If you are running a brand doing $10M+ in annual revenue on Magento, Adobe Commerce, or Salesforce Commerce Cloud, and the platform is costing more to maintain than it would cost to migrate, let us map the business case together.
We will audit your current TCO, model the Shopify Plus alternative, and give you a straight answer on whether migration makes financial sense for your specific situation. No pitch. No pressure. If staying put is the right call, we will tell you.