* Would give tax break to green energy projects
* Administration eyes REIT tax break -analyst
By Roberta Rampton
WASHINGTON, June 7 (Reuters) - A freshman U.S. Democratic senator thinks he may have found a way to encourage investment in wind, solar and biofuel projects without sapping too many taxpayer dollars or injecting new venom into a bitter partisan battle over energy incentives.
Chris Coons introduced legislation on Thursday that would allow a broad range of renewable power generation and transmission projects to qualify for a tax structure used widely by pipeline and other energy-related companies.
The bill is unlikely to be considered until after the November presidential election, but may give lawmakers food for thought as they wrestle with whether to extend tax breaks for green energy set to expire this year.
The "master limited partnership," or MLP, structure allows certain types of companies to raise money in the stock market, while having income taxed only at the unit holder level, avoiding corporate income taxes.
"It's something that's been used for decades," said Coons, who represents Delaware, a state where financing has fallen short for offshore wind power projects.
"This is one energy financing vehicle that we should all be able to agree on," he said in an interview.
Under the current law, MLPs must generate at least 90 percent of their income from real estate or natural resources like fossil fuels or timber - and must return most of its cash to its investors, who are taxed on those returns.
There are about 100 MLPs in the United States with a total market capitalization of more than $350 billion, including the likes of pipeline giants Enterprise Products Partners and Kinder Morgan Energy Partners.
Coons' two-page bill is landing when government support for energy has become highly politicized heading into the Nov. 6 elections.
Democrats have railed against tax breaks for big oil companies, which they argue are unnecessary given high gasoline prices and record profits.
Existing government tax breaks designed to help commercialize renewable power are expiring, and face an uphill political battle for renewal.
Republicans have campaigned against green energy incentives championed by President Barack Obama, such as the $535 million loan guarantee for Solyndra, a bankrupt solar manufacturer.
"What I heard time and time again from the Republicans on the (Senate Energy) committee and on the floor was the criticism that we were, as they put it, picking winners and losers," Coons said.
Coons argued his bill cut out the politics by having the policy apply to all forms of energy, not just renewables.
He has won support from Republican Senator Jerry Moran of Kansas, who co-sponsored the bill along with five Democratic senators.
Others have expressed support for the idea but have told Coons he may need to wait until Congress begins to tackle a broad overhaul of the tax code next year.
In the past, MLPs have been eyed as a special-interest loophole that could face elimination under tax reforms.
"This is a proposal that turns that argument on its head and says, 'Well if it works, why not do more of it?'" said Christine Tezak, an energy policy analyst at Robert W. Baird & Co.
Coons said the bill could unleash "billions of dollars" in investment for r enewable energy MLPs, n oting more precise projections would depend on w h ether current tax credits and exemptions for the sector continue.
A study by Southern Methodist University's Maguire Energy Institute has estimated expanding MLP structure to renewables could mean $3.2 billion to $5.6 billion in the next 10 years for the industry, although an aide to Coons cautioned the study's results were not a precise comparison with what is included in the draft legislation.
The bill has not yet been "scored" by congressional number-crunchers who will estimate its cost to taxpayers.
The current cost of existing oil- and gas-related MLPs to the tax base has been estimated at a relatively modest $2.4 billion over 10 years.
It is unlikely Congress would consider the Coons bill until next year, given the pre-election gridlock and a long list of spending and tax bills that must be passed before the end of 2012, said Whitney Stanco, senior policy analyst with Guggenheim Partners.
"Bringing it up now and having the discussion now is positive to creating some momentum behind it later," she said.
In the near term, Stanco said it was more likely the Obama administration would look at extending the "real estate investment trust" or REIT, tax structure to renewable energy.
Like MLPs, REITs are not required to pay corporate tax but must distribute most of their income to investors.
Stanco told clients on Wednesday that the Energy and Treasury Departments were in "preliminary discussions" on whether the Internal Revenue Service could issue guidance on an extension, and what type of income would be covered.
"I think the idea about opening up the REIT structure to renewables administratively is gaining some traction," Stanco said in an interview, noting the action may not require congressional approval.
The Energy Department is looking for ways to help renewable energy projects get private capital, a spokeswoman said without commenting on whether discussions were under way. A Treasury Department spokeswoman had no comment and referred an inquiry to the Energy Department.
Coons said he thought the Internal Revenue Service may need "explicit statutory authority" to expand the REIT structure.
"I think it would require legislation, but that's part of what we're looking at," he said.