The growth rate has been even faster among S corporations with more than $10 million in assets. From 1985 to 2002, the number of these larger S corporations grew more than tenfold, from 2,305 to 26,096. “The use of S corporations has exploded,” said IRS Commissioner Mark W. Everson. “The IRS needs a better understanding of what this means for tax compliance. This research is critical for achieving our strategic goal of ensuring that corporations and high-income individuals are paying their fair share.” S corporations are now the most common corporate entity.