Supplemental Security Income (SSI) and Social Security beneficiaries in the U.S. will receive three payments in December due to New Year's Day falling on a federal holiday. SSI recipients will get their December payment on December 31 instead of January 1. This early disbursement includes the regular December payment and the January payment for some beneficiaries. Additionally, the article mentions potential increases in monthly benefit amounts for individuals and couples in 2026 and for those retiring at full retirement age or age 70.