The Fire will receive $1.2 million in allocation money — $300,000 in general and $900,000 in targeted allocation money — making it one of the most expensive deals between MLS clubs. Half of the fee will be sent now with the other half set to be sent after the 2018 MLS season.
Accam joins the Union following three seasons with the Fire, scoring 33 goals and adding 15 assists over that span. The 27-year-old Ghanaian finished last season with 14 goals and eight assists.
“Today’s acquisition of David Accam marks an exciting moment for our club, and we are thrilled to welcome him to the Philadelphia Union,” Union sporting director Earnie Stewart said. “David possesses electrifying speed and skill to go along with a nose for goal comparable to the very best in MLS.
"We believe him to be a perfect fit as we continue to build our attacking corps. He provides an instant boost on the wing and we look forward to integrating him with our team as soon as possible.”
Accam joined MLS in 2015 as a designated player, after spending the previous three season at Swedish club Helsingborgs IF.