Mayor Bill de Blasio admitted Wednesday he has no idea how much his administration is spending on tickets to movies and Mets games used to entice accused criminals into returning for their mandated court appearances — three days after The Post revealed the program’s existence.

“I’m not aware of the specifics of the budgeting and how it works and where the funds come from,” de Blasio said at an unrelated press conference.

But he applauded the plan run by his Office of Criminal Justice in conjunction with the not-for-profit Criminal Justice Agency that will offer tickets and gift cards to ensure that inmates who get sprung don’t skip their court dates. It’s part of the a new bail-reform law that starts next year.

“In a world where want speedier trials, if small incentives are part of what actually makes it work then that’s a smart policy,” Hizzoner said at the monthly crime statistics press conference in Brooklyn.

“It’s not something we developed, it’s something that has been worked on by experts over time and proven to work, proven to be a good investment,” de Blasio added about the perks program.

“I think people should ask a real basic question: ‘What’s going to get trials to happen on a regular basis, speedily? What’s going to help us mete out justice the way it’s supposed to be done? What’s going to make things work in a new reality?’ That’s all that matters to me,” he said.

A spokeswoman for the mayor’s office later said that the Mets tickets were donated.

Incoming NYPD Commissioner, Chief Dermot Shea, said at the press conference that he is open to trying the program.

“Is it a good idea to give people Mets tickets? I don’t know, but I’m willing to try different things,” he said.

A spokeswoman for the mayor later said the incentives — which also include things like toiletries and are distributed at the discretion of social workers — are a small part of a larger $12 million supervised release program. She did not immediately have a dollar amount for the sports tickets, gift cards and movie passes.