GOP lawmaker: Health law rules will prevent smart hiring

"For many years, it has been customary for companies to provide their officers with non-taxable health insurance as part of their compensation and benefits package," Graves wrote. "Such plans sometimes require lower premiums from these employees than others."

The letter warned that many firms, particularly smaller ones, could be unfairly penalized under the Affordable Care Act depending on the rules' final phrasing.

The letter comes ahead of a Small Business hearing Wednesday on how firms are coping with the healthcare law's requirements.

It was addressed to Treasury Security Jack LewJacob (Jack) Joseph LewBig tech lobbying groups push Treasury to speak out on EU tax proposal Overnight Finance: Hatch announces retirement from Senate | What you can expect from new tax code | Five ways finance laws could change in 2018 | Peter Thiel bets big on bitcoin Ex-Obama Treasury secretary: Tax cuts 'leaving us broke' MORE and Steve Miller, acting commissioner of the Internal Revenue Service.