International SEO: ccTLD vs Subdomain vs Subfolder

Before implementing hreflang, there is a more fundamental decision to make: how do you structure the URLs for your international versions? This decision affects domain authority, the geographic signals Google receives, maintenance cost, and ranking speed in each market. And once made, changing it requires a complete SEO migration.

The three international structure options

ccTLD: maximum geographic signal, maximum cost

A ccTLD (Country Code Top-Level Domain) like .es, .fr, or .co.uk is the strongest geographic signal you can send Google. Google knows with certainty that example.es targets the Spanish market. No additional geotargeting configuration in Search Console is needed.

• •Advantage: maximum geographic signal — Google prioritizes ccTLDs in local searches.
• •Advantage: users in each country trust a local domain more (.es for Spain, .fr for France).
• •Advantage: complete independence between markets — a problem on one domain does not affect the others.
• •Disadvantage: each ccTLD starts from zero in terms of authority — it does not inherit the main domain's authority.
• •Disadvantage: cost of registering and maintaining multiple domains.
• •Disadvantage: you need to build a separate link building strategy for each ccTLD.
• •Disadvantage: operationally more complex — multiple deployments, multiple SSL certificates, multiple server configurations.

Subdomains: a middle ground with some drawbacks

Subdomains (es.example.com, fr.example.com) are technically separate domains but associated with the main domain. Google largely treats them as separate entities, although with some signal transfer from the root domain.

• •Advantage: easy to set up — no need to register additional domains.
• •Advantage: geotargeting configurable in Google Search Console per subdomain.
• •Advantage: clear technical separation between language/country versions.
• •Disadvantage: Google treats them as separate sites for authority calculation — the main domain's authority does not transfer fully.
• •Disadvantage: backlinks to the root domain (example.com) do not directly benefit es.example.com.
• •Disadvantage: for users, it may feel less intuitive than /es/ in the URL.

Subfolders: the most efficient option for most sites

Subfolders (example.com/es/, example.com/fr/) are the option Google most frequently recommends for sites beginning international expansion. All content lives under the same domain and shares the accumulated authority.

• •Advantage: the entire main domain's authority benefits all language versions.
• •Advantage: a single domain to manage — one SSL certificate, one deployment, one server configuration.
• •Advantage: backlinks to the root domain benefit all subfolders.
• •Advantage: faster ranking in new markets thanks to inherited authority.
• •Disadvantage: weaker geographic signal than ccTLDs — you need to configure geotargeting in Search Console.
• •Disadvantage: a server failure affects all language versions simultaneously.
• •Disadvantage: less local brand differentiation (the URL shows the main domain, not a local one).

When to choose each option

Hreflang with each structure: what changes

Hreflang implementation is similar across all three structures, but there are important practical differences:

• •With ccTLD: hreflang is especially important because Google may not automatically know that example.es and example.fr are versions of the same site. Hreflang confirms the relationship.
• •With subdomains: configure geotargeting in Search Console for each subdomain in addition to hreflang.
• •With subfolders: hreflang is the main geotargeting signal — also add the configuration in Search Console at the directory level.

Regardless of the structure you choose, iRankly's Hreflang Validator lets you verify that your hreflang tags are correct and that bidirectionality between language versions works as Google expects.