Republican Congressman Michael Grimm speaks with the media after voting during the U.S. midterm elections in Staten Island, New York in this Nov. 4, 2014, file photo. Reuters/Eduardo Munoz/Files

Rep. Michael Grimm, R-N.Y., has decided to resign his Congressional seat in the wake of pleading guilty to a felony tax evasion charge, the New York Daily News reported late Monday.

Grimm, a former Marine and FBI agent, had maintained only days ago that he would not give up his hard-fought seat representing the New York City borough of Staten Island and part of Brooklyn. But after discussing the matter with House Speaker John Boehner, R-Ohio, the 44-year-old Grimm changed his mind, the newspaper reported.

According to New York's Channel 7, a local ABC News affiliate, Grimm's resignation will be effective next Monday.

Grimm, a second-term Congressman who recently won re-election to a third term, is expected to disclose his resignation publicly Tuesday or Wednesday.

He was charged in connection with a health food restaurant, Healthalicious, that he co-owned. Federal prosecutors charged him April 28 in a 20-count indictment alleging fraud, tax evasion and perjury. On Dec. 23 he entered a single guilty plea to tax evasion.

Grimm's office has not returned a phone call requesting comment.

This story has been updated to add a comment from Michael Grimm, as quoted by ABC New York.