Keisan Studio
Project estimation and delivery
Estimate for approval
EST-DEMO-EST
E-commerce Replatform — SOW
Headless migration from Magento to Next.js + Shopify with a zero-downtime cutover.
- Prepared for
- E-commerce Replatform
- Date
- October 27, 2026
- Total investment
- $112,760
Scope of work
New headless storefront, design system, full catalog and content migration, payments integration, SEO preservation with redirect mapping, and a staged production cutover.
Investment breakdown
| Item | Hours | Total |
|---|---|---|
| Headless architecture & migration planPrincipal Engineer | 48 h | $10,320 |
| Design system & component libraryProduct Designer | 110 h | $15,950 |
| Storefront build (Next.js)Senior Engineer | 160 h | $26,400 |
| Shopify + payments integrationSenior Engineer | 90 h | $14,850 |
| Catalog & content migrationMid-level Engineer | 120 h | $15,000 |
| SEO, redirects & performanceSenior Engineer | 56 h | $9,240 |
| QA & zero-downtime cutoverQA Engineer | 96 h | $9,120 |
| Delivery managementProject Manager | 88 h | $11,880 |
| Total | 768 h | $112,760 |
Planning range
- Optimistic
- $95,846
- Recommended
- $112,760
- Pessimistic
- $146,588
The recommended figure is the project as scoped. The planning range of $95,846 to $146,588 allows for best-case delivery and for changes to scope.
Assumptions
Product data is exportable as clean CSV/JSON. Client provides Shopify Plus access and a content freeze window for cutover.
Key considerations
SEO ranking dips during migration if redirects are incomplete. Third-party Magento extensions may not have direct equivalents.
Review and respond
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