MG OMD won the business after a swift pitch run through COI against Mediaedge:cia and Carat.
The Home Office previously assigned media planning agencies on a project-by-project basis but took the decision to consolidate as part of "streamlining" of its communications.
Previously, the majority of its work was split between MG OMD and MEC. Carat was the wild card in the pitch, having been included after handling planning for other government departments including the Department for Transport.
Other agencies have worked for the Home Office but did not participate in the pitch. PHD was recently appointed to work on an anti-kerb crawling brief and Naked Communications has worked for its UK Passport Service division.
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 the COI and Home Office. However, the COI said at the time that it was comfortable giving clients the option of appointing a single planning agency from its roster.
Media buying for the Home Office continues to be handled by the COI roster agencies: Carat for television buying, MediaCom for press and Starcom for radio. Outdoor buying is handled by Posterscope.
A Home Office spokeswoman confirmed that a decision had been made but declined to comment further.