Lawful permanent residency does not expire. Green cards (which are used as proof of LPR status) expire, but you can keep renewing the card without applying for

Lawful permanent residency does not expire. Green cards (which are used as proof of LPR status) expire, but you can keep renewing the card without applying for citizenship. https://www.uscis.gov/green-card/after-we-grant-your-green-card/maintaining-permanent-residence https://www.uscis.gov/green-card/after-we-grant-your-green-c... https://www.alllaw.com/articles/nolo/us-immigration/failed-renew-green-card.html https://www.alllaw.com/articles/nolo/us-immigration/failed-r... However, if you do not apply for citizenship once you are eligible, you lose certain legal protections against employment discrimination: https://www.justice.gov/crt/8-usc-1324b-unfair-immigration-related-employment-practices https://www.justice.gov/crt/8-usc-1324b-unfair-immigration-r...