As some Americans struggle to save for retirement, key 401(k) plan changes could soon make preparing easier for certain workers, experts say. 

Enacted by Congress in 2022, “Secure 2.0” ushered in sweeping changes to the U.S. retirement system, including several updates to 401(k) plans. Some of these provisions will go into effect in 2025.

Meanwhile, roughly 4 in 10 American workers say they are behind in retirement planning and savings, primarily due to debt, not enough income or getting a late start, according to a CNBC survey, which polled about 6,700 adults in early August.

Dave Stinnett, Vanguard’s head of strategic retirement consulting, said 401(k) plans are “the primary way most Americans prepare for retirement” and those accounts can work “very, very well” when designed properly.

Here are some key changes for 2025 and what employees need to know.

For 2025, employees can defer $23,500 into 401(k) plans, up from $23,000 in 2024. Workers ages 50 and older can make up to $7,500 in catch-up contributions on top of the $23,500 limit.

But there’s an “exciting change” to catch-up contributions for a subset of older workers in 2025, thanks to Secure 2.0, according to certified financial planner Jamie Bosse, senior advisor at CGN Advisors in Manhattan, Kansas.

Starting in 2025, the catch-up contribution limit will jump to $11,250, about a 14% increase, for employees ages 60 to 63. Including the $23,500 limit, these workers can save a total of $34,750 in 2025.

Only 14% of employees maxed out 401(k) plans in 2023, according to Vanguard’s 2024 How America Saves report, based on data from 1,500 qualified plans and nearly 5 million participants.

On top of maxing out contributions, an estimated 15% of workers made catch-up contributions in plans that allowed it during 2023, the same report found.

Secure 2.0 has also boosted access to 401(k) and 403(b) plans for certain part-time workers.

Starting in 2024, employers were required to extend plan access to part-time employees who worked at least 500 hours annually for three consecutive years. That threshold drops to two consecutive years in 2025.

“That’s a very good thing for long-term part-time workers” who may have struggled to qualify for 401(k) eligibility, said Stinnett.

In March 2023, some 73% of civilian workers had access to workplace retirement benefits, and 56% of workers participated in these plans, according to the U.S. Bureau of Labor Statistics.

“Coverage is my thing,” said Alicia Munnell, director of the Center for Retirement Research at Boston College.

“It’s important that people have coverage no matter where they go,” including from full-time to part-time at the same job, she added.

Automatic enrollment and escalation — gradually increasing the contribution rate annually — are key plan designs to boost savings, Stinnett previously told CNBC.

But those features still may not result in employees saving enough. While experts recommend a 15% savings rate, most plans set a cap on automatic escalation. In 2022, 63% limited automated contributions to 10% or less of annual pay, according to the Plan Sponsor Council of America.

Many large U.S. companies have seen their stocks swell since the presidential election.

The top 10 performing stocks in the S&P 500 index saw returns of 18% or more since Election Day, according to data provided by S&P Global Market Intelligence, which analyzed returns based on closing prices from Nov. 5 to Nov. 20.

Two companies — Axon Enterprise (AXON), which provides law-enforcement technology, and Tesla (TSLA), the electric-vehicle maker led by Elon Musk, an advisor to President-elect Donald Trump — saw their stocks gain more than 35%, according to S&P Global Market Intelligence.

By contrast, the S&P 500 gained about 2% over the same period.

Investors should be cautious about buying individual stocks based on short-term boosts, said Jeremy Goldberg, a certified financial planner, portfolio manager and research analyst at Professional Advisory Services, Inc., which ranked No. 37 on CNBC’s annual Financial Advisor 100 list.

“It’s usually a bad idea,” Goldberg said. “Momentum is a powerful force in the market, but relying solely on short-term price moves as an investment strategy is risky.”

Investors should understand what’s driving the movement and whether the factors pushing up a stock price are sustainable, Goldberg said.

Companies in the streaming ecosystem — like Warner Bros. Discovery (WBD), which owns the Max streaming service, and Disney+ owner The Walt Disney Co. (DIS) — may be benefactors of looser rules around consolidation, they said.

For example, Palantir Technologies (PLTR), cited “unprecedented” demand for its AI platform in the third quarter, helping deliver “exceptionally strong” earnings, Treasurer and CFO David Glazer told investors Nov. 4.

Likewise, Axon beat analysts’ estimates in its Nov. 7 earnings results, with officials touting its “AI era plan” and raising earnings guidance, Goldberg said.

Axon and Palantir stocks were up 38% and 22%, respectively, from Nov. 5 to Nov. 20, according to S&P Global Market Intelligence.

Some companies benefited from a combination of policy and earnings, experts said.

Take Vistra Corp. (VST), an energy provider, for example. The company’s stock jumped 27% after Election Day.

Vistra is in talks with large data centers — or “hyperscalers” — in Texas, Pennsylvania and Ohio to build or upgrade gas and nuclear plants, Stacey Doré, Vistra’s chief strategy and sustainability officer, said on the company’s Q3 earnings call Nov. 7.

Tech companies are building more and more such data centers to fuel the AI revolution — and need to source increasing amounts of energy to run them.

Musk, Tesla’s CEO, was one of Trump’s top campaign backers. Trump tapped him to co-lead a new Department of Government Efficiency. Shares of the electric-vehicle maker soared 14% the day after the election and almost 30% by week’s end.

But Tesla stock has additional tailwinds, experts said.

For one, Trump wants to end a $7,500 federal tax credit for EVs. Scrapping that policy is expected to hurt Tesla’s EV rivals.

Tesla has also been developing technology for driverless vehicles. In Tesla’s recent earnings call, Musk said he’d use his influence in Trump’s administration to establish a “federal approval process for autonomous vehicles.”

With the Biden administration’s new student loan repayment plan is tied up in legal battles, millions of borrowers have had their monthly payments put on hold.

The break from the bills is likely a relief to the many federal student loan borrowers enrolled in the Saving on a Valuable Education plan, known as SAVE. But it may also be causing them anxiety over the fact that they won’t get credit on their timeline to debt forgiveness.

For example, those also enrolled in the Public Service Loan Forgiveness program, who are entitled to loan cancellation after 10 years, have seen their journey toward that relief halted during the forbearance.

“Borrowers are frustrated about the delay toward forgiveness,” said higher education expert Mark Kantrowitz. “They feel like they’ve been waiting for Godot.”

Here’s what borrowers enrolled in SAVE should know about the delay to debt cancellation.

In October, the U.S. Department of Education said that roughly 8 million federal student loan borrowers will remain in an interest-free forbearance while the courts decide the fate of the SAVE plan.

A federal court issued an injunction earlier this year preventing the Education Department from implementing parts of the SAVE plan, which the Biden administration had described as the most affordable repayment plan in history. Under SAVE’s terms, many people expected to see their monthly bills cut in half. 

The forbearance is supposed to help borrowers who were counting on those lower monthly bills. But unlike the Covid-era pause on federal student loan payments, this forbearance does not bring borrowers closer to debt forgiveness under an income-driven repayment plan or Public Service Loan Forgiveness.

Adding to borrowers’ annoyance is that “those enrolled in the SAVE Plan were not given the choice of forbearance,” said Elaine Rubin, director of corporate communications at Edvisors, which helps students navigate college costs and borrowing. If borrowers want to stay in SAVE, they can’t opt out of this pause.

Borrowers enrolled in PSLF are especially concerned, Kantrowitz said. That program requires borrowers to work in public service while they’re repaying their student loans.

“They have been working in a qualifying job, but aren’t making progress toward forgiveness,” he said. “Some borrowers are working a job they hate, but are sticking with it in the expectation of qualifying for forgiveness. Others are close to retirement and don’t want to have to work past their normal retirement age just to get the forgiveness.”

You may be able switch into another income-driven repayment plan that is still available. Under that new plan, you may have to start making payments again. Yet if you earn under around $20,000 as a single person, your monthly payment could still be $0, and therefore you might not lose anything by switching, Kantrowitz said.

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Changing plans might be especially appealing to those who are very close to crossing the finish line to debt forgiveness and just want to see their balance wiped away, experts said. (You’ll likely be placed in a processing forbearance for a period while your loan servicer makes that switch. During that time, you will get credit toward forgiveness.)

The Education Department is also offering those who’ve been working in public service for 10 years the chance to “buy back” certain months in their payment history. This allows borrowers to make payments to cover previous months for which they didn’t get credit. But to be eligible for the option, the purchased months need to bring you to the 120 payments required for loan forgiveness.

“The buyback option might be eliminated under the Trump administration,” Kantrowitz said. “So, if you want to use it, you should use it now.”