Subdomain or Subdirectory: Which Is Better for SEO?
Subdomain or subdirectory: both work, but the latter is often simpler to manage for SEO. Here is how to decide.
· 1 min read
When you add a blog, a store or an international version to a website, you have to choose where to host it: on a subdomain (blog.example.com) or in a subdirectory (example.com/blog/).
What does Google say?
Google states it can crawl, index and rank both structures properly. There is therefore no absolute rule. The question is mostly about simplicity, technical management and organization.
Advantages of a subdirectory
- Simpler management: one site, one set of settings, one tracking setup.
- Brand consistency: everything lives under the same domain, which makes the site easier to understand as a whole.
- Natural internal linking between the blog, service pages and product pages.
- Clearer measurement with a single property to follow.
When to choose a subdomain
- When the section is technically separate: another platform, another host or another development team.
- When the content is very different from the main site (for example an app or a customer area).
- When you want to isolate a space for security or organizational reasons.
A subdomain is generally treated as a separate site. It therefore needs its own tracking and promotion work. In Search Console, a domain property can still group the data together.
What about international versions?
For language versions, a subdirectory (example.com/fr/) is often the most practical solution. In every case, use hreflang tags to link the versions together, and a consistent URL structure. A dedicated country-code domain (ccTLD) is a strong geographic signal but more costly to manage.
Our recommendation
- By default, choose the subdirectory for the blog and content related to your main business.
- Keep the subdomain for cases where the technical or functional separation is real.
- Avoid changing architecture without a solid reason: a poorly prepared migration can lose traffic. If you do it, set up page-by-page 301 redirects.
The best choice is the one you can maintain cleanly over time, with stable URLs and a clear organization.