The Jersey Shore star and his brother/manager Marc were charged in 2014 and again previous year with multiple counts related to almost $9 million in income from the show.
Mike and his brother were accused in 2014 after they failed to pay taxes on $8.9 million-worth of income between the years 2010 and 2012.
The brothers are scheduled to be sentenced on April 25.
The 35-year-old however, didn't have much to say leaving federal court in Newark Friday after pleading guilty to one count of tax evasion as part of plea deal in an ongoing tax fraud case. Sorrentino was expected to face 15 years in prison if convicted.
The Sorrentino brothers created businesses, such as MPS Entertainment LLC and Situation Nation Inc., "to take advantage of Michael's celebrity status", federal prosecutors said. He also admitted to making "cash deposits into bank accounts in amounts less than $10,000 each" to avoid detection by the IRS.More news: Life is Strange: Before the Storm Limited Editions coming in March
In addition to prison time, the Sorrentino brothers also face a fine of up to $250,000 each. In April of a year ago, they were indicted again on further charges including tax evasion and structuring and falsifying records.
Meanwhile in Miami, Mike's castmates have been busy filming an upcoming reboot series, with Nicole "Snooki" Polizzi, Jenni "JWoww" Farley, Deena Nicole Cortese and Vinny Guadagnino all spotted getting to work on Jersey Shore: Family Reunion.
Former Republican Gov. Chris Christie criticized the show for promoting stereotypes, and past year signed a bill capping the amount of state money universities can pay for speakers, after Rutgers University paid cast member Nicole "Snooki" Polizzi $32,000 in 2011.
Sorrentino rose to fame with the December 2009 premiere of MTV's "Jersey Shore".