Keen to buttress margins and appease investor concerns at a time of slowing sales growth, big U.S. technology firms are expected to whittle away at their bloated workforce and costs through the next few months, reversing pandemic-era excesses, analysts said.

Each of America's five largest tech companies, though, are expected to report a fall in profits for the October-December period, as they try to recalibrate in a high-interest environment. Facebook-owner Meta Platforms Inc. and Amazon.com Inc. are expected to report the biggest declines.

Analysts have cut their total revenue projection for the five companies – Meta, Amazon, Apple Inc., Alphabet Inc. and Microsoft Corp. – by 5 percent to $561.4 billion as of January from October.

Big tech companies are expected to be among the biggest drags to S&P 500's eleven sectors, with the information technology sector projected to report an earnings decline of 9.5 percent, according to FactSet data.

"I would not expect good news for a while ... at least for the next three quarters. I would expect more layoffs," said Siddharth Singhai, chief investment officer at investment firm Ironhold Capital.

Amazon, which is expected to report that earnings slumped 38 percent and revenue grew at the slowest pace in over 22 years, started communicating to staff on Wednesday whether they were laid off as part of its decision to cut 18,000 jobs.

The reduction in workforce came after the retailer over-hired based on pandemic demand, echoing Meta's aggressive hiring to meet a surge in social media usage by stuck-at-home consumers.

Meta, which decided in November to chop 11,000 jobs, could see a 42-percent plunge in profit, its fifth straight quarter of decline. The company is also likely to see a 7-percent fall in revenue –  its worst showing ever.

The five companies on average increased their employee base by 45 percent in 2020 and 20.5 percent in 2021, with Apple hiring the most modestly.

"We are forecasting another 5 percent to 10 percent headcount cut across the tech sector as many of these companies were spending money like 1980s rockstars," said Wedbush analyst Dan Ives.

Microsoft said on Wednesday it would eliminate 10,000 roles, affecting less than 5 percent of its employees. Analysts expect the company to report a 2.4 percent rise in revenue, the slowest pace in about 24 quarters. Profit is expected to fall 9 percent.

Revenue growth at Alphabet, which is slowing hiring and making "course corrections" to cut costs, is expected to be the slowest in 10 quarters.

To shore up stock prices, analysts said these companies could pour money into buybacks this year. Their shares fell between 26 percent and over 60 percent last year versus the broader market's nearly 20 percent decline.

They together have cash and cash equivalents of over $110 billion, with Amazon having the most and Meta having the least at the end of the September quarter.