Registering your domain for ten years instead of one will not improve your rankings. Google has said so directly, more than once. Here is where the myth came from, why it refuses to die, and the domain decisions that actually matter for search.

What Google actually says

Google representatives have stated repeatedly that domain registration length is not a ranking signal. Registrars sell multi-year terms with SEO framing anyway, because the myth converts. No credible test has ever shown a ranking difference from registration term alone.

Where the myth came from

A 2005 Google patent on historical data mentioned that legitimate domains are often paid for several years in advance while throwaway spam domains rarely are. A patent describes what a company could theoretically use, not what the ranking system does. The SEO industry read it as gospel and two decades of blog posts kept it alive.

What multi-year registration is actually for

Not losing the domain. An accidental expiry is a genuine SEO catastrophe: the site goes down, and if a squatter catches the drop you may never get it back.
Security: longer terms plus registrar lock shrink the window for renewal hijacks.
Operations: one less annual task that can silently fail when a card expires.

Spend the energy where rankings live

Titles that match real queries, pages that answer them, and links you earned. That is the whole game. Related myths, including what domain age does and does not do, are covered in our ranking factors guide.

Verdict
Register for multiple years for operational safety, never for rankings. If an agency lists registration length in its SEO deliverables, ask what else on the invoice is decoration.