To achieve Lifetime Platinum Elite status in the Marriott Bonvoy program in 2026, you must meet two rigorous milestones: 600 Lifetime Nights and 10 Years of Platinum Elite status (or higher). A "Year of Status" is counted if you achieved Platinum, Titanium, or Ambassador status during that calendar year. These 600 nights can be accumulated through actual hotel stays, promotional "double night" offers, or through Marriott co-branded credit cards, which often grant 15 to 25 "Elite Night Credits" just for holding the card. Once you hit these twin milestones, your Platinum status never expires, regardless of how many nights you stay in future years. This is the highest "Lifetime" tier currently achievable; while "Lifetime Titanium" exists for those who were "grandfathered" in during the SPG merger years, it is no longer available for new applicants in 2026, making Lifetime Platinum the ultimate goal for dedicated Marriott loyalists seeking permanent perks like lounge access and suite upgrades.