Under the "stabilizer" provision of the Social Security law, a benefit increase may be reduced from what it otherwise would be, in conditions of low trust fund ratios. If a benefit increase is reduced, "catch-up" benefit increases may be paid in later years to beneficiaries affected by the initial benefit reduction. (None of the three Trustees Report alternatives have any catch-up benefit increases.)
The program will assume that there are no future catch-up benefit increases unless you check this box. It is available only if you choose "Other" benefit increases.