The two provisions are the infamous PEP and Pease, which aficionados of stealth tax increases will recognize immediately as relics of the 1990 tax increase. …

Under the new law, some of the steepest tax increases may fall on upper-middle class earners with incomes just above $250,000. …

The Senate Finance Committee informs us that in effect the loss of the personal exemptions, currently $3,800 per family member, can mean a 4.4 percentage point rise in the marginal tax rate for a married couple with two kids and incomes above $250,000. A family with four kids in that income range faces about a six percentage point marginal rate hike. The restored limitations on itemized deductions can raise the tax rate by another one percentage point. …

A store manager married to a dentist with a combined income of, say, $350,000 may pay a higher tax rate under the new law than if the tax code had simply reverted back to the Clinton-era rates that Mr. Obama championed. Those earning more than $450,000 would see their de facto tax rate rise to about 41% under the new law, not 39.6%. Add in the new ObamaCare investment taxes and the tax rate on interest income is close to 45%.