Employee Benefit Plan	12 Months Ended
Dec. 31, 2019
Retirement Benefits [Abstract]
Employee Benefit Plan	Employee Benefit Plan We provide a retirement savings option to our eligible U.S. employees through the Moderna, Inc. 401(k) Plan (the 401(k) Plan), subject to certain limitations. As allowed under Section 401(k) of the Internal Revenue Code, the 401(k) Plan allows tax deferred salary deductions for eligible employees. We match 50% up to the first 6% contributed by a participant. All matching contributions are immediately vested. Total matching contributions to the 401(k) Plan were $4.2 million, $2.1 million, $2.1 million for the years ended December 31, 2019, 2018 and 2017, respectively.

Employee Benefit Plan

12 Months Ended

Dec. 31, 2019

We provide a retirement savings option to our eligible U.S. employees through the Moderna, Inc. 401(k) Plan (the 401(k) Plan), subject to certain limitations. As allowed under Section 401(k) of the Internal Revenue Code, the 401(k) Plan allows tax deferred salary deductions for eligible employees. We match 50% up to the first 6% contributed by a participant. All matching contributions are immediately vested. Total matching contributions to the 401(k) Plan were $4.2 million, $2.1 million, $2.1 million for the years ended December 31, 2019, 2018 and 2017, respectively.