(Bloomberg) — America’s biggest employers, from GE to IBM, are increasingly moving retirees to insurance exchanges where they select their own health plans, an historic shift that could push more costs onto U.S. taxpayers.

Time Warner Inc.  said Sunday it would steer retired workers toward a privately run exchange, days after a similar announcement by International Business Machines Corp. General Electric Co. last year said it, too, would curb benefits in a move that may send some former employees to the public insurance exchanges created under the 2010 Affordable Care Act.

While retiree health benefits have been shrinking for years, the newest cutbacks may quickly become the norm. About 44% of companies plan to stop administering health plans for their former workers over the next two years, a survey last month by consultant Towers Watson & Co.  found. Retirees are concerned their costs may rise, while analysts predict benefits will decline in some cases.

“Things are going to change dramatically,” said Ron Fontanetta, a partner at New York-based Towers Watson, which advises GE and other large companies. “Over the next two to three years, we see a much more aggressive rethinking of what employers are going to provide.”

The adjustments come as insurers have increased access the past few years to Medicare Advantage plans that provide benefits beyond the U.S. government health program for the elderly. Additionally, the health-care law promises to make it easier for those younger than 65 to buy insurance that’s guaranteed and subsidized by taxpayers.

Private Exchanges

The private exchanges are designed to join with companies to find the best deals for the former workers. The public exchanges established under ‘Obamacare,’ set to open Oct. 1, were created to provide insurance for millions of uninsured Americans. In both cases, enrollees will be able to select from a menu of private health plans.

Companies argue that many retirees can find more choice and a better deal on the exchanges, said John Grosso, head of the retiree health task force at Aon Hewitt LLC, a Chicago-based consultant. Instead of taking a one-size-fits-all company plan, a healthier retiree might find a less expensive policy with a higher deductible, or one that saved money by favoring generic drugs, he said in a telephone interview.

Less healthy workers or those who need more comprehensive coverage may not fare as well, Grosso said.

‘Gold-Plated’ Plans

“Some of them may not be as well off because they had a really gold-plated plan, but others who are paying a meaningful contribution to their own plan now can right-size the coverage,” he said.

At the same time, retirees have expressed concern that subsidies provided by companies in private exchanges may not keep up with rising medical costs, potentially putting them at financial risk in the future. And an influx of retirees could put added pressure on public exchanges that provide taxpayer-supported subsidies.

Retirees aren’t the only ones feeling the pinch. Last month, United Parcel Service Inc. told workers it would no longer provide health care for 15,000 spouses who can get benefits through their own employer. The company cited rising medical costs in general as well as the added expenses and new insurance options created by the health law.

IBM’s Decision

IBM said last week it will shift about 110,000 Medicare-eligible retirees to Tower Watson’s Extend Health, the largest private Medicare exchange. Former workers will find more options than the business could provide through its own plan, IBM, the third-largest U.S. employer according to data compiled by Bloomberg, said in a statement e-mailed Sept. 7. Caterpillar Inc. and DuPont Co. also have moved Medicare-age retirees onto the Extend exchange.

For most, coverage will come “at the same or lower cost” than they pay now. The Armonk, New York-based company will still make contributions to a tax-free health retirement account for the workers.

IBM capped its subsidies to retirees in the 1990s and “didn’t make this change to save money,” Doug Shelton, a spokesman, said in an e-mail. “It does not reduce our costs.” Rather, the company is making the change to help former workers, whose premiums and out-of-pocket charges are projected to triple by 2020 under the current plan, Shelton said.

WASHINGTON (AP) — When President Barack Obama helped push the Patient Protection and Affordable Care Act (PPACA) through Congress, he counted labor unions among his strongest supporters.

But some unions leaders have grown frustrated and angry about what they say are unexpected consequences of PPACA — problems that they say could jeopardize the health benefits offered to millions of their members.

The issue could create a political headache next year for Democrats facing re-election if disgruntled union members believe the Obama administration and Congress aren’t working to fix the problem.

“It makes an untruth out of what the president said, that if you like your insurance, you could keep it,” said Joe Hansen, president of the United Food and Commercial Workers International Union. “That is not going to be true for millions of workers now.”

The problem lies in the unique multiemployer health plans that cover unionized workers in retail, construction, transportation and other industries with seasonal or temporary employment. Known as Taft-Hartley plans, they are jointly administered by unions and smaller employers that pool resources to offer more than 20 million workers and family members continuous coverage, even during times of unemployment.

The union plans were already more costly to run than traditional single-employer health plans. PPACA has added to that cost — for the unions’ and other plans — by requiring health plans to cover dependents up to age 26, eliminate annual or lifetime coverage limits and extend coverage to people with pre-existing conditions.

“We’re concerned that employers will be increasingly tempted to drop coverage through our plans and let our members fend for themselves on the health exchanges,” said David Treanor, director of health care initiatives at the Operating Engineers union.

Workers seeking coverage in the state-based marketplaces, known as exchanges, can qualify for subsidies, determined by a sliding scale based on income. By contrast, the new law does not allow workers in the union plans to receive similar subsidies.