The Senate’s top tax lawmaker Wednesday expressed support for moving toward a “technology-neutral” system of tax incentives for energy production.

Sen. Ron Wyden Ronald (Ron) Lee WydenGOP senator blocks Schumer resolution aimed at Biden probe as tensions run high Republican Senators raise concerns over Oracle-TikTok deal Hillicon Valley: TikTok, Oracle seek Trump's approval as clock winds down | Hackers arrested for allegedly defacing U.S. websites after death of Iranian general | 400K people register to vote on Snapchat MORE (D-Ore.) endorsed the idea as an effort to simplify the United States’ tax code, including different tax breaks for different energy sources, some of which have expired.

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“It’s past time to replace today’s crazy quilt of more than 40 energy tax incentives with a modern, technology-neutral approach,” Wyden said at a hearing on energy tax policies.

“The disparity in how the tax code treats energy sources — and the uncertainty it causes — has to end,” he said.

Wyden, who has backed tax breaks for renewable energy including the wind production tax credit that expired last year, said that fossil fuels generally benefit from incentives that do not expire. But renewables have to deal with “stop-and-go” credits that have to be passed by Congress each year.

Sen. Michael Bennet Michael Farrand BennetOVERNIGHT ENERGY: House Democrats tee up vote on climate-focused energy bill next week | EPA reappoints controversial leader to air quality advisory committee | Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals' Senate Democrats demand White House fire controversial head of public lands agency Next crisis, keep people working and give them raises MORE (D-Colo.) also backed incentives that do not discriminate on technology, though warned that “it’s important for us to get the details right.”

Wyden’s hearing is part of an effort he launched earlier this year when he took control of the Senate Finance Committee to write a “comprehensive” tax reform package. He was chairman of the Energy and Natural Resources Committee before he shifted to the tax panel.

Sen. Mike Enzi Michael (Mike) Bradley EnziChamber of Commerce endorses McSally for reelection Cynthia Lummis wins GOP Senate primary in Wyoming The Hill's Convention Report: Democrats gear up for Day Two of convention MORE (R-Wyo.) warned against eliminated tax policies that benefit the oil and natural gas industry, such as the ability to deduct drilling costs.

“Those are comparable, perhaps, to research and development, but I think they’re more comparable to amortization and depreciation,” he said. “So the loss of this deduction for producers would reduce their available capital immensely.”

While not endorsing Wyden’s technology-neutral approach, Sen. Debbie Stabenow (D-Mich.) said it is important to level the playing field between fossil fuels and alternative energy.

“The reality is that we’ve had a permanent tax policy since 1916 in some way incentivizing or supporting oil,” she said, estimating that fossil energy companies have received $166 billion in tax incentives in the last three decades.

“We picked a winner, and they won,” Stabenow said. “So now the question is, can we create more competition for different kinds of energy and create a policy that makes sense for all of them?”