New York City is forecast to shed more multimillionaires this year — with billions in Wall Street bonuses in their wake.

The massive bonus pool typical for city workers is under stress as more bankers and traders bolt for Florida and other states to escape New York’s punishing taxes and steep living costs, according to several pros who have studied the latest compensation data from the state comptroller.

“The governor and mayor don’t want to talk much about highly paid people like bankers leaving New York,” said Alan Johnson, CEO of New York-based compensation consultancy Johnson Associates.

“There are many relocating — and if you see financial service firms expanding in future, it will be to Tampa, Fla., and Austin, Texas, and other places where it’s not as expensive to live as New York,” he added. “It’s showing up in the numbers.”

With the alarming outflow of city residents — many of them wealthy bankers — New York state lost a staggering $8.4 billion to other states in 2016, the latest year data are available, one study shows. And that was up from $4.6 billion annually on average during the prior four years.

While New York state Comptroller Thomas DiNapoli’s recent report presents a mostly positive picture — with securities industry profits at $27.3 billion in 2018, up 11 percent from the previous year — the average industry employee bonus in New York City dropped by nearly 17 percent, to an estimated $153,700. Employment expanded by 4,700. The city’s budget for 2019 assumes a further bonus pool decline of 9 percent for financial workers in the city.

Johnson said the comptroller’s prediction of a 9 percent bonus slump in 2019 is based on the expectation that more highly paid financial professionals will flee, rather than an actual pay drop.

“Nobody is forecasting [Wall Street] pay to be down for 2019,” Johnson said.

Last year, for example, asset manager AllianceBernstein announced it was moving its headquarters, and 1,050 jobs, from Manhattan to Nashville, Tenn. According to a study by Bankrate, the cost of living is 58 percent lower in the Nashville area than in New York.

“Considering how you can [make] trades from anywhere in America, I don’t see why low bonuses, and an unfavorable state and local tax rate, would make traders want to stay in New York,” said New York city trader Chris Craddock. “I already know a lot who have relocated to Florida and Texas — and they enjoy paying for goods and services state-tax free.”

Even the state comptroller seems leery. “It’s too soon to say how the industry will fare in 2019,” DiNapoli said last week.