The main purpose of the Social Security Guarantee Act of 2025 is to ensure that individuals receive their Social Security benefits in full, along with an accurate annual adjustment for cost-of-living increases. This legislation aims to protect the financial security of those who rely on Social Security by guaranteeing that their benefits keep pace with inflation and any changes in their eligibility. Key provisions of this act include the requirement for the Secretary of the Treasury to issue a benefit guarantee certificate to each person entitled to Social Security benefits.