Space.com by Elizabeth Howell 3/17/2020
NASA's forthcoming moon-rocket program is so costly that the agency will need to let Congress know of budgetary overruns while reviewing the program, NASA's inspector general said in a March 10 report.
The inspector general examined the Space Launch System (SLS) — the rocket that NASA hopes to start sending on test flights starting in 2021 — as well as the rocket's program costs and contracts, to see how the rocket's development was proceeding.
The actual development cost of the SLS program has soared to at least 33% beyond its original, Congress-approved agency baseline commitment (ABC) of $7 billion, which doesn't include $2.7 billion of formulation costs, the report concludes. (The figures are based on fiscal 2019 numbers.)
More:
https://www.space.com/nasa-sls-megarocket-cost-schedule-oig-report-2020.html