How do I migrate from Shopify to Magento for the Irish + GB market?

Common scenario for Irish brands that grew on Shopify and now need customs-aware multi-region, OSS VAT, B2B account flows, and lower per-order costs. Migration plan:

1. Data export from Shopify, products, customers, orders, redirects via API.
2. Magento setup, multi-website (IE store + GB store), shared catalogue + customer base, region-specific tax / payment / shipping.
3. 301 redirects from Shopify URL patterns (/products/...) to Magento (/catalog/product/view/...) so SEO equity transfers.
4. Stripe migration, carry over Stripe customer IDs so saved cards keep working.
5. Cutover at off-peak (3 AM GMT) with DNS flip; old Shopify stays as a read-only fallback for 30 days.

Typical timeline: 6-10 weeks. Cost saving: per-order Shopify Plus fees (0.15-0.30%) disappear, offsets the licence cost within ~€1M annual revenue. Dublin reference store: Shopify → Magento at €3.4M revenue, paid back in 8 months.