One Rank One Pension (OROP) is a pension reform movement that would provide the same pension to military personnel who retire at the same rank, regardless of their year of retirement. Unlike civil services, most soldiers are compulsorily retired between 35-37 years of age. Implementing OROP would benefit 25 lakh ex-servicemen but cost the government an estimated Rs. 8,300 crore annually. It was an election promise of the BJP party.