Common Shopify / BigCommerce → Magento migration path for AU stores: (1) data export, products, customers, orders, blog posts via Shopify’s API or BigCommerce’s API (we use Cart2Cart for bulk + custom scripts for edge-cases), (2) URL preservation, map old `/products/` → new `/.html` via 301 redirects so SEO doesn’t drop, (3) payment-rail re-wire, Shopify Payments → Stripe AU + Afterpay + Zip (we install + configure all three), (4) tax + GST, Shopify auto-calculates AU GST; on Magento we wire ATO rate tables + ABN-based exemption, (5) app → extension swap, e.g. Klaviyo → Mailchimp/Klaviyo for Magento, Yotpo → Yotpo for Magento, ReCharge → Aheadworks Subscription. Typical timeline: 6-10 weeks for a 5k-product Shopify store with 50k orders of history. AU-specific gotchas: GST low-value-threshold logic, AU postcode validation, ParcelPoint pickup-point integration if Shopify had it.