TAX CUTS AND JOBS ACT: These 12 companies will pay the highest effective tax rate

• The House and Senate have both passed versions of a tax plan which include huge cuts for business taxes.
• Credit Suisse crunched the numbers to see who would be paying the highest effective tax rate under proposed rules.

No matter which tax reform bill, whether from the House of Representatives or the Senate, eventually gets signed into law by President Donald Trump, taxes will likely shrink for a wide swath of American companies.

Credit Suisse crunched the numbers based on the publicly available information about the plans to see which companies could end up paying the highest effective tax rate.

"Companies with primarily domestic end-markets tend to pay more in taxes," the bank said. "As a result, groups such as Retail, Transports, Business Services, and Telecom should outperform as investors begin to discount tax relief. This should come at the expense of TECH+, Pharma & Biotech, and Autos, which are disadvantaged by proposed changes."

Transports, discretionary retailers, and business services will carry the highest tax rates, according to Credit Suisse, with Tech hardware and Semiconductors likely paying the lowest. The S&P 500, on average, will pay an effective tax rate of about 27.4%.

Here are the 12 companies that could pay the highest effective tax rates under the proposed rules: