LAGAN Valley assembly member Paul Givan will accrue two per cent of his first minister salary pro rata towards his assembly pension.
No date has yet been given for his resignation which has been ordered by DUP party officers following the fall of his mentor Edwin Poots who became the shortest-serving party leader last week.
Mr Givan is expected to join him in the record books when his brief time as first minister ends.
A Poots loyalist, new leader Sir Jeffrey Donaldson is believed not to favour him and is himself planning to leave Westminster to take a seat in the assembly.
He previously said he would take the post as joint leader of the Executive if he became leader.
The Assembly Commision would not comment on Mr Givan's likely salary enhancement from his time in office.
"The Assembly does not comment on the amount of any pension that a member will be entitled to as this can only be determined at the time of their retirement," a spokeswoman said.
However, it did offer clarity on the pension system.
"The amount of the pension that is payable to a former member is affected by a number of things including their salary as a member or office holder, the length of their service and whether they transferred a pension in from a previous employment or purchased added years.
"Pensions for Assembly Members are governed by the Northern Ireland Assembly Members Pension Scheme (http://www.niassembly.gov.uk/globalassets/documents/your_mlas/pension/niamps-privacy-notice-feb-2019.pdf ) which states that members accrue pension entitlement at two per cent of their annual pensionable salary and this is pro-rated for the length of time in office."
