Treat the redirect map as the project, not a task inside it. With 40,000 products and organic at 60 percent of revenue, the highest-risk item is mapping every old URL to its best new page, in a single hop, before data migration starts. Done well, expect a short dip of roughly 5 to 15 percent that recovers in weeks. Done badly, third-party examples show 30 to 50 percent losses that take months.
Order history is a separate, lower-risk decision: migrate recent orders live and archive the rest. If traffic has already dropped, read our post-migration recovery answer; for planning, see a realistic migration timeline. Our Shopify migration service includes an SEO plan with the redirect map built first.
What actually causes traffic loss
Six causes, in rough order of damage.
Pages that ranked disappear, and the link equity pointing at them is wasted.
Sending a product to its parent category, or to a different product type, creates a relevance mismatch.
Temporary redirects do not reliably pass authority.
A to B to C slows crawling. Map each old URL directly to its final page.
Navigation, filters, descriptions and category copy that gave pages their rank get thinner or vanish.
A heavy new theme or too many apps can undo gains from a good map.
The redirect mapping process
Build it before you migrate data.
- Crawl the live site and export URLs from analytics and Search Console. Combine them.
- Rank URLs by organic traffic, links and revenue. Protect the top tier by hand.
- Match by product identifier such as SKU, not by guesswork. Test a sample.
- Map each URL straight to its final target, with no chains.
- Return a clean 410 for thin pages with no traffic or links.
- Import in bulk by CSV, and spot-check before and after launch.
- Confirm current redirect limits and import behaviour for your Shopify plan before you finalise the file.
Pre-migration SEO audit checklist
Sign these off before cutover.
| Area | Check | Why it matters |
| URLs | Full inventory and 1-to-1 map | Prevents 404s |
| Content parity | Titles, descriptions, headings and body copy carried over | Protects rankings |
| Internal links | Navigation and in-copy links rewritten to new URLs | Saves crawl budget |
| Technical | Canonicals, hreflang, robots, noindex, XML sitemaps | Avoids indexing mistakes |
| Structured data | Product, breadcrumb and review markup present | Keeps rich results |
| Speed | Core Web Vitals on key templates | Rankings and conversion |
| Measurement | Baseline traffic, rankings and revenue by page type | Proves recovery |
A realistic dip and recovery curve
Use ranges, not promises.
- With 301s done well: a temporary dip of about 5 to 15 percent, recovering in roughly four weeks.
- Authority transfer from redirects often takes two to four weeks.
- Consolidating variant pages can take two to three weeks for Google to re-evaluate.
- Without proper redirects: losses of 30 to 50 percent, with six to twelve months to recover.
- Avoid URL or taxonomy changes for 90 days after launch.
These figures come from agency guides and illustrative examples. We do not publish before-and-after traffic charts for a named migration.
Order history: what migrates and what archives
Eight years of records, three buckets.
| Bucket | Treatment | Reason |
| Recent orders, for example the last two years | Migrate as records linked to customers | Support, returns and reorders |
| Older orders | Archive read-only, or migrate as simplified records | Avoids billing, fulfillment and tax side effects |
| Financial source of truth | Keep in the ERP or accounting system | Shopify is not the ledger |
Historic orders do not behave like live ones, so test that imports trigger no emails or inventory changes.
Migration SEO support, and what we cannot show
Our migration work includes URL mapping and redirect planning. We do not have a published case study with before-and-after organic charts and a recovery timeline in weeks, so we will not quote one here.
Read more: our Shopify migration service
Send us a crawl export and your top organic pages, and our migration SEO team will review your redirect plan and flag the highest-risk URLs.
Frequently Asked Questions
Missing or wrong redirects, URL and taxonomy changes, lost internal links and content, thin or changed templates, and slower pages. The redirect map is the single biggest risk.
A temporary dip of roughly 5 to 15 percent that recovers within weeks is typical when redirects are done well. Done badly, losses of 30 to 50 percent are reported. These are third-party examples, not guarantees.
Usually recent orders migrate into live records and older ones are archived read-only. Records older than about two years can lose line-item tax detail, discounts or fulfillment events.
Mostly no. Shopify uses fixed paths for products, collections, pages and blogs. Plan for 301 redirects from every old URL, and avoid further URL changes for 90 days after launch.
Crawl the live site, map every URL, validate redirects on staging, check canonicals, sitemaps, structured data, internal links and speed, then re-crawl after launch. See our Shopify SEO tips.
