The nonpartisan Tax Policy Center estimates the biggest benefit of the new law will go to households making $308,000 to $733,000. Households making over that should get a tax cut worth 3.4 percent of their after-tax income. For the richest 0.1 percent (making over $3.4 million), the tax cut should be worth 2.7 percent of their after-tax income. For middle-income earners: 1.6 percent, the center estimates.