Officially, Mexico does not strictly enforce a six-month passport validity rule for entry. According to Mexican immigration regulations and the National Institute of Migration (INM), your passport must simply be valid for the duration of your intended stay in the country. However, many airlines and international travel advisories strongly recommend having at least six months of validity remaining to avoid any potential complications or delays during boarding or at border control. This is because immigration officers have the discretion to grant a stay of up to 180 days, and they prefer that your document covers that entire possible window. Additionally, if you are transiting through other countries (like the USA or various European hubs) on your way to or from Mexico, those nations may have their own strict six-month requirements. To ensure a completely stress-free trip in 2026, it remains a "best practice" to renew your passport if it has less than half a year of life left.