Posted on March 14, 2019
The Public Prosecution Service is due to make its decisions public at 11:00 GMT, having weighed up 125,000 pages of material.
Charges, including murder and attempted murder, have been considered against 17 Army veterans.
In 2010, a public inquiry under Lord Saville concluded the 1972 shootings in Londonderry were unjustified.
Bloody Sunday is one of the darkest days of the Northern Ireland Troubles.
Thirteen people were killed and 15 injured on 30 January 1972, when troops fired more than 100 times as trouble broke out at a civil rights march.
One of the injured died five months later but the Saville Inquiry said it was “not the result of any of the wounds he sustained on Bloody Sunday”. Families of the victims will be told if any of the former soldiers, now in their 60s and 70s, are to face charges shortly before the news is made public.
Around the same time, the decisions will also be communicated to solicitors representing the former Parachute Regiment soldiers.