1. Short title This Act may be cited as the Social Security 2100 Act . 2. Table of contents The table of contents for this Act is as follows: Sec. 1. Short title. Sec. 2. Table of contents. Title I—Strengthening Benefits Sec. 101. Across-the-board benefit increase. Sec. 102. More accurate cost-of-living adjustment for Social Security beneficiaries. Sec. 103. Increase in minimum benefit for lifetime low earners based on years in the workforce. Sec. 104. Increase in threshold amounts and rate for inclusion of Social Security benefits in income. Sec. 105. Holding SSI, Medicaid, and CHIP beneficiaries harmless. Title II—Strengthening the Trust Fund Sec. 201. Determination of wages and self-employment income above contribution and benefit base after 2018. Sec. 202. Inclusion of earnings over $400,000 in Social Security benefit formula. Sec. 203. Adjustment to the Social Security insurance contribution. Sec. 204. Social Security Trust Fund established. I Strengthening Benefits 101. Across-the-board benefit increase (a) In general Section 215(a)(1)(A)(i) of the Social Security Act ( 42 U.S.C. 415(a)(1)(A)(i) ) is amended by striking 90 percent and inserting 93 percent . (b) Effective date (1) In general The amendment made by subsection (a) shall apply with respect to monthly insurance benefits payable for any month after December 2018. (2) Recomputation of primary insurance amounts Notwithstanding section 215(f) of the Social Security Act ( 42 U.S.C. 415(f) ), the Commissioner of Social Security shall recompute primary insurance amounts originally computed for months prior to January 2019 to the extent necessary to carry out the amendments made by this section. 102. More accurate cost-of-living adjustment for Social Security beneficiaries (a) In general Section 215(i)(1) of the Social Security Act ( 42 U.S.C. 415(i)(1) ) is amended by adding at the end the following new subparagraph: (H) the term Consumer Price Index means the Consumer Price Index for Elderly Consumers (CPI–E, as published by the Bureau of Labor