Brothers will earn $1.1 million while on the active roster and $450,000 while in the minors, a source tells ESPN's Buster Olney.
Brothers, 29, became arbitration eligible when his club option for the 2018 season was not exercised.
Brothers was 4-3 with a 7.23 ERA in 27 games in 2017. The reliever struck out 33 batters over 23 2/3 innings. His 12.55 strikeouts per nine innings led all Atlanta pitchers with 20 or more appearances.
In six major league seasons, Brothers has a 20-14 record with a 3.76 ERA and 20 saves. He signed with the Braves as a minor league free agent on Feb. 3.
The Associated Press contributed to this report.