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The Crazy Way the U.S. Tax System Saps the Economy

One of the goals of the Tax Cuts and Jobs Act, the GOP tax plan unveiled earlier this week, is to close the gap between corporate tax rates in the U.S. and those abroad. A recent study, published as a working paper by Harvard Business School, shows just how much that gap could be costing the U.S. economy--and why tax reform advocates are so eager to eliminate it.

Could it be that America’s multinationals resemble rich folk who steer big portions of their income into low-yielding tax shelters, just to hold down their payments to the Treasury and state governments? In other words, are big companies pouring their earnings into mediocre investments simply to avoid or delay paying taxes? If that’s the case, the U.S. corporate tax system is preventing the free flow of capital to the place it earns the best returns, and in the process, stifling economic growth.

That’s precisely what’s happening, according to the study co-authored by Urooj Khan, a professor at Columbia Business School. “Corporate profits right now are great,” notes Khan, “But they’re not translating into economic growth in the U.S. And that’s because of the way the U.S. taxes foreign earnings.”

Read: “The GOP Tax Plan: 3 Big Wins for Business.”

The problem, says Khan, is that the U.S. system encourages multinationals to hold profits earned abroad in overseas subsidiaries, where they’re either stockpiled in cash, plowed into new factories and labs, or deployed to buy foreign companies. In most cases, he says, those investments generate far lower returns than those available right here at home--but they’re better for overall earnings simply because bringing them home would generate a gigantic tax bill.

It’s a combination of super-high rates, and the ease of avoiding them by exploiting the generous tax shelters on foreign profits, that explains why multinationals leave most of those earnings abroad--even though they typically generate subpar returns. The U.S regime imposes our statutory 35% tax rate on earnings booked anywhere around the globe; multinationals are obligated to send the Treasury the difference between our 35% and what they’ve already paid in the nation where they produce the products. And that difference is often big. If a pharma or tech giant repatriates profits from Ireland, where the top rate is 12.5%, it would face an additional tax of 22.5%. That’s so stiff that U.S. companies pass up rich opportunities stateside just to avoid the hit.