The decline in corporate income tax revenue has nothing to do with corporations’ ability to pay: Pre- and post-tax profit margins in the nonfinancial corporate sector, 1979–2020

Year Pre-tax Post-tax
1979 13.55% 7.71%
1980 10.96% 5.86%
1981 11.97% 7.39%
1982 10.38% 7.14%
1983 11.80% 8.15%
1984 13.68% 9.43%
1985 13.02% 9.27%
1986 10.26% 6.73%
1987 10.81% 6.60%
1988 11.45% 7.12%
1989 10.00% 6.07%
1990 8.98% 5.55%
1991 9.05% 5.86%
1992 9.24% 6.08%
1993 10.64% 7.15%
1994 12.89% 8.55%
1995 13.57% 9.22%
1996 14.52% 10.11%
1997 14.94% 10.37%
1998 13.04% 9.09%
1999 11.95% 8.10%
2000 9.58% 6.09%
2001 7.53% 5.44%
2002 9.37% 7.50%
2003 11.47% 8.83%
2004 14.09% 10.35%
2005 15.69% 10.55%
2006 17.15% 11.60%
2007 14.82% 9.86%
2008 12.68% 9.25%
2009 11.43% 8.61%
2010 15.30% 11.67%
2011 15.84% 12.26%
2012 16.69% 12.61%
2013 17.09% 12.92%
2014 16.89% 12.55%
2015 15.94% 11.95%
2016 14.80% 11.26%
2017 14.38% 11.39%
2018 15.13% 12.51%
2019 14.58% 12.15%
2020 14.91% 12.58%

Note: Profit margins are defined here as unit profits (profits per dollar of output) divided by all other unit costs. 

Source: National Income and Product Accounts Table 1.14 from the Bureau of Economic Analysis. 

View the underlying data on epi.org.