MG OMD won the business following a swift pitch against Mediaedge:cia and Carat, which was run through COI.
Previously, the Home Office assigned media planning agencies on a project-by-project basis, but it took the decision to consolidate as part of a "streamlining" of its communications.
The majority of work was divided between MG OMD and Mediaedge:cia, but Carat was the wildcard in the pitch, having been included after handling planning for a number of other government departments, including the Department for Transport.
Other agencies, including PHD and Naked, have worked for the Home Office, but did not participate in the pitch.
Recent campaigns through the Home Office include a crime prevention push focusing on cars and mobile phones, as well as activity addressing both fire and internet safety.
The review sparked reports of a rift between COI and the Home Office. But COI said it was happy giving clients the option of hiring a single planning agency from its roster.
Media buying for the Home Office continues to be handled by COI roster agencies: Carat for television buying, MediaCom for press, and Starcom for radio. Outdoor is handled by Posterscope.
A Home Office spokeswoman confirmed a decision had been made, but declined to comment further.