The disgraced former head of the NYPD sergeants union, Ed Mullins, pleaded guilty to federal wire fraud Thursday for stealing hundreds of thousands of dollars in union members’ dues.

Wearing a navy suit and a baseball cap, Mullins, 61, appeared in Manhattan Federal Court around 3:30 p.m. to enter his plea. He surrendered in February on charges he plundered more than $1 million from his union’s bank accounts.

The incendiary ex-labor boss admitted to defrauding the Sergeants Benevolent Association between 2017 and 2021. He scammed his members by billing them for expensive meals at high-end restaurants, designer clothing, jewelry, home appliances, a relative’s college tuition, and other personal expenses.

“Beginning in late 2017, while I was president of the SBA, I submitted false and inflated expense reports to the SBA for reimbursement,” Mullins said in court. “I did this with the purpose of obtaining money from the SBA contingent fund … which I was not entitled to.”

U.S. District Judge John Koeltl asked Mullins if he knew at the time that what he was doing “was wrong and illegal.”

“Yes, your honor,” Mullins said.

On top of filing the bogus expenses, Mullins charged extra and pocketed the difference, like in April 2021, when he changed a $45.92 charge to an $845.92 charge at a wine bar in New Jersey in April 2021, court records show.

Authorities said that the money came from a fund comprised almost entirely of member dues. The SBA is the fifth-largest police union in the country.

Had Mullins gone to trial, Assistant U.S. Attorney Alexandra Rothman told the court that prosecutors would have presented evidence the feds’ seized from his Long Island home and SBA headquarters, expense reports, doctored credit card statements, and email and bank records.

“Edward Mullins promised to look out for the thousands of hard-working NYPD Sergeants who are members of the SBA. Instead, as admitted today in federal court, he stole hundreds of thousands of dollars from them to fund his lavish lifestyle,” Manhattan U.S. Attorney Damian Williams said. “Thanks to the hard work of the FBI, Mullins’s betrayal has been exposed, and he now faces jail time and significant financial penalties.”

Mullins agreed to forfeit $600,000 to the government and to pay $600,000 in restitution to the SBA. The union sued him in March 2022 for embezzling the funds. He faces up to 20 years for the conviction when he’s sentenced on May 25 but is unlikely to serve that long.

Mullins declined to comment outside of court.

“There’s not many among us who haven’t strayed from the path in life. At the same time, no one’s beyond redemption. I think Mr. Mullins took a big step today towards righting his wrongs,” his lawyer Thomas Kenniff said.

“He’s done great things for the people of the city of New York, great things for the NYPD, and great things for the members of his union, again, aside from this very unfortunate incident.”

The longtime union boss stepped down from his post of 19 years during the FBI probe. He joined the NYPD in 1982 and became a sergeant in 1993. He was elected SBA president in 2002. Records show that Mullins earned $88,757 from the union in 2018, on top of his NYPD salary of $130,542.

Mullins’ federal case and resignation followed a series of scandals. The firebrand was accused of making racist, homophobic, and misogynist comments on several occasions — like referring to Black football player Trevor Bates as a “wild animal” and the city health commissioner a “b----h” over a dispute about wearing masks during the COVID-19 pandemic.

In September 2021, he was accused at an NYPD trial of violating departmental rules when he posted a police report about the arrest of former Mayor Bill de Blasio’s daughter, Chiara, on Twitter. She was busted for blocking traffic near Union Square in a protest over the police killing of George Floyd in May 2020.