Never mind Gucci and Tiffany, Mr. Mayor — the small businesses surrounding Trump Tower are taking a beating from the “frozen zone” and heavy security protecting the president-elect.

Plummeting receipts have already led to layoffs at the Central Park Electronics store on Sixth Avenue, where two lonely salesmen were eating sandwiches at the counter Sunday afternoon during what is normally the Christmas rush.

“The business went down drastically,” employee Jimmy Carbonell said.

“We had to lay people off because we can’t afford to keep the entire staff on.”

At Allen M Jewelers on Madison Avenue, manager Jimmy Tarzy said the safety measures securing Donald Trump’s namesake skyscraper — and plush penthouse pad — had caused sales to plunge 70 percent during the past four weeks.

“No one came in today. No one came in all day. It’s been like this since the minute they started blocking the streets,” he said.

“Last Tuesday we did $65 for the whole day. Leading up to the holiday season, that’s insane. We should be really busy. It’s empty.”

Tarzy also blasted Mayor Bill de Blasio, who last month dismissed worries about the bottom lines of Fifth Avenue’s luxury retailers, saying: “I will not tell you that Gucci and Tiffany are my central concerns in life.”

“Good luck getting re-elected! He will be our last concern come Election Day,” Tarzy fumed.

Daniel Wolman, general manager of the Kiton custom-tailor shop on West 54th Street, also called de Blasio “a joke.”

“We have to find a way to do business no matter how insensitive our mayor is to our livelihood,” he said.

Wolman said his store’s losses last month were so severe that “I don’t want to give you a number, because it was so bad, it would make our business look bad.”

“We sell $10,000 suits, so one of our customers makes a big difference in our daily total,” he said.

A report set for release Monday by city Comptroller Scott Stringer says a recent survey of 50 small businesses around Trump Tower found nearly half reporting a “severe” impact from the security plan.

Nearly a quarter of the restaurants, retailers, food stores and beauty salons said they’ll have troubling paying their rent, and more than 12 percent warned they might have to lay off workers, relocate or simply shut down.

A whopping 70 percent also said they’d suffered delays getting deliveries or having their trash removed.

The situation is especially dire because some stores usually make 30 percent of their annual sales during the Christmas shopping season, according to the National Retail Federation.

The “frozen zone” bars vehicles from West 56th Street between Madison and Sixth avenues — including alongside Trump Tower — and there are barricades lining both sides of Fifth Avenue from West 55th Street to West 58th.

An NYPD security tent in front of Armani’s flagship store on Fifth Avenue was also infuriating shoppers who had to get their bags inspected by cops with flashlights before heading north toward Trump Tower.

“No fun this year. We had to get searched to cross the street,” said Sal Giannini, 44, of Morristown, NJ, who was visiting the Big Apple with his wife and two daughters.

“It’s like they want us to leave. I hope they figure it out, or this is the end of a family tradition.”

Councilman Dan Garodnick (D-Manhattan), whose district encompasses Trump Tower, described the neighborhood as a “war zone” that’s “totally unfriendly to commercial activity.”

“The city needs to think of ways to mitigate the impact through allowing traffic down 56th Street between Fifth and Sixth avenues, and by moving the (NYPD) command post west of Fifth Avenue to somewhere east,” he said.

Garodnick sent a letter asking NYPD Commissioner James O’Neill to relocate the command post and establish a police liaison to the local business owners, property managers and residents to help them arrange “deliveries and other needs so they can continue to operate with some degree of normalcy.”

Manhattan Borough President Gale Brewer urged de Blasio to visit Fifth Avenue and encourage shopping there.

“A lot of these stores survive on the tourist dollar,” she said.

“You don’t want any empty storefronts in that area.”

Neither City Hall nor Trump’s presidential transition team returned requests for comment.

Additional reporting by Shari Logan