This prospectus supplement (this "Prospectus Supplement") of i-80 Gold Corp. ("i-80" or the "Company"), together with the accompanying base shelf prospectus filed April 14, 2025 and amended on May 1, 2025 (File No. 333-286531) and Form S-3MEF (File No. 333-287243) (the "Shelf Prospectus"), qualifies the distribution of an aggregate of 3,453,237 common shares of the Company (the "Common Shares") at a price of US$1.39 per Common Share (the "Offering Price") as consideration for the termination of the Amended and Restated Offtake Agreement dated August 23, 2023 (the "2023 Offtake Agreement") among: (i) Goldcorp Dee LLC, as seller; (ii) the Company Premier Gold Mines USA, Inc., Premier Gold Mines Nevada Inc., Au-Reka Gold LLC, Osgood Mining Company, LLC and Ruby Hill Mining Company, LLC (collectively, the "Guarantors"), as guarantors; and (iii) TRR Offtakes LLC ("TRR"), as purchaser and purchasers’ agent (the "Offering") and the satisfaction of all amounts owing thereunder. On September 26, 2025, TRR assigned all of its right, title and interest in the 2023 Offtake Agreement to Vox Royalty Cayman SEZC ("Vox Cayman"), a subsidiary of the Seller (defined below) pursuant to Section 13.1 of the 2023 Offtake Agreement.