20% excise tax would be imposed on imported goods and services produced abroad excluded from US taxes.

The proposed tax, tucked deep in the 429-page bill backed by President Donald Trump, caught corporate tax strategists by surprise and sent them scrambling to understand its dynamics and goals.

20% percent excise tax is one such proposal targeting the abuses of so-called transfer-pricing where multinationals themselves set prices of goods, services and intellectual property rights that constantly move between their national business units.

Under global standards, those prices should resemble those available on the open market. However, if a foreign parent charges U.S. affiliates inflated price, it can reduce its U.S. tax bill and effectively shift profits to a lower-tax country, reducing the entire corporation’s overall tax costs.

U.S. business units that import products, pay royalties or other tax-deductible, non-interest fees to foreign parents or affiliates in the course of doing business would either pay a 20-percent tax on these or agree to treat the amounts as income connected to their U.S. business and subject to U.S. taxes.

New tax rule would apply only to businesses with payments from U.S. units to foreign affiliates exceeding $100 million. The rule would not take effect until after 2018.

European companies that sell foreign-made products into the U.S. market through local distribution units could be among those most affected.

Will see how it goes, but most probably need to expect significant price hikes.