Redirect Strategy for SEO: 301, 302, and 307 Redirects Explained

Every URL change on your website — a product page restructure, a domain migration, an HTTPS upgrade, a content consolidation — triggers a redirect. Done right, redirects preserve your search rankings and user experience. Done wrong, they bleed link equity, break crawling, and frustrate users.

The three most common HTTP redirect status codes — 301, 302, and 307 — serve fundamentally different purposes. Confusing them is one of the most avoidable yet common technical SEO mistakes, costing sites measurable ranking losses after migrations.

301 Redirect: Permanent Move

A 301 status code signals to search engines that a page has moved permanently. Google passes the vast majority of link equity — 90–99% depending on the source — from the old URL to the new one. The 301 tells Google to update its index, replacing the old URL with the new one in search results.

Use the 301 for:

• Domain migrations (example.com → example.net)
• Changing URL structures (/product?id=123 → /product/blue-widget)
• Consolidating duplicate content (/page-a → /page-b)
• Redirecting old blog posts to updated versions
• HTTP → HTTPS transitions

When implementing 301 redirects at scale, create a comprehensive redirect map before cutting over. A redirect map is a CSV with two columns: Old URL and New URL. Every URL that has ever received traffic, backlinks, or has been indexed must appear in this map. Sites that skip this step lose 30–50% of their organic traffic post-migration.

302 Redirect: Temporary Move

A 302 status code signals a temporary move. Google understands that the original URL will return, so it keeps the old URL in its index and continues to attribute link equity to the original address. The 302 is designed for short-term redirects.

Use the 302 for:

• Seasonal landing pages redirected to current promotions
• A/B testing where the control URL remains canonical
• Temporary maintenance pages
• Country-specific redirects based on geolocation (with hreflang annotations)
• Flash sales or limited-time offers

The common mistake: using 302 redirects for permanent moves. Some platforms default to 302 when you "redirect" a URL in settings. Always verify your redirect type using a tool like Redirect Path Chrome extension or curl -I. A misplaced 302 during a domain migration results in zero link equity transfer.

307 Redirect: HTTP 1.1 Temporary with Method Preservation

The 307 status code replaced the 302 in HTTP/1.1 for one specific reason: method preservation. A 307 redirect guarantees that the HTTP method used in the original request (POST, PUT, DELETE) is retained in the redirected request. A 302 may change a POST request to GET, which breaks form submissions and API endpoints.

For SEO purposes, Google treats 307 redirects similarly to 302 — temporary, no link equity transfer, original URL retained in the index. The practical difference matters almost exclusively for technical implementations.

Use the 307 for:

• Post-submission success redirects after form processing
• API redirects where method preservation is critical
• Payment flow redirects between checkout steps
• Any temporary redirect involving POST requests

For the vast majority of SEO use cases, you will use 301 and 302 only. 307 is relevant when your engineering team implements redirects for transactional paths.

Redirect Chains and Redirect Loops

A redirect chain is a sequence of three or more redirects before reaching the final URL. Example: /old → /newer → /newest → /new. Each hop adds latency, consumes crawl budget, and leaks a small percentage of link equity — estimated at 3–8% per redirect hop.

Audit your redirect chains quarterly. Most SEO crawlers (Screaming Frog, Semrush Site Audit, Ahrefs) provide redirect chain reports automatically. Collapse any chain longer than two hops into a single redirect. If /old → /newer → /newest → /final is your chain, update the redirect map so /old → /final directly.

A redirect loop — where /a redirects to /b which redirects back to /a — is a critical error. Googlebot will eventually stop crawling both URLs, and users see a browser error. Loops typically occur after multiple rounds of URL restructuring without updating intermediate redirects. Run a redirect loop check before every deployment.

Redirect Mapping Best Practices

The redirect map is the single most important document you create for any site migration. Build it in a structured spreadsheet with these columns:

• Old URL (full absolute URL)
• New URL (full absolute URL)
• HTTP status code (301, 302, 307)
• Reason for redirect (e.g., "product discontinued," "category restructured")
• Effective date

Include every URL from your sitemap, your Google Search Console "indexed pages" export, your top 1,000 pages by traffic, and any URL with external backlinks. A typical ecommerce migration generates 5,000 to 50,000 redirect rules. Do not rely on wildcard redirects ("redirect all /products/* to /shop/*") — they miss edge cases and create unintended redirects.

Preserving Link Equity During Migration

Link equity preservation is the core SEO objective of any redirect strategy. Beyond using the correct status code, ensure that your redirect target page has relevant content. Redirecting /red-widgets to the homepage bleeds equity because the content mismatch signals to Google that the redirect is not truly equivalent.

Redirect to the most contextually relevant page. If a specific product is discontinued, redirect to the category page containing similar products, not the homepage. If a blog post is merged, redirect to the merging post. Google's algorithms evaluate content relevance through redirects — mismatches reduce equity transfer.

Implement Redirects With Confidence

A well-executed redirect strategy protects your search visibility through migrations, site restructures, and content consolidations. Whether you're moving a personal blog or a 500,000-page enterprise site, the rules are the same: use 301 for permanent, 302 for temporary, map every URL, eliminate chains, and redirect to relevant content.

SoniNow's technical SEO team manages redirect strategies for complex site migrations. We build comprehensive redirect maps, audit existing redirect health, and ensure your link equity stays intact through any transition.

→ Let's talk about your site migration and build a redirect plan that protects your rankings.