Social security trust fund depletion now projected for 2035, one year later than previously forecast, as stronger-than-expected economic growth and immigration boost payroll tax revenue. The latest Social Security Trustees report shows the combined trust fund can pay full benefits until 2035, after which only 83% of scheduled benefits will be payable unless Congress acts. Lawmakers face mounting pressure to close the $22 trillion shortfall through tax hikes, benefit cuts, or both.