In the 2013–14
Second League of Republika Srpska season play-off, Krupa got an appearance in the
First League of the Republika Srpska for the season
2014–15. After only two years playing in the 2nd tier and after the season
2015–16, the team got promoted for the first time in its history to the
Premier League of Bosnia and Herzegovina. In the
2017–18 Bosnian Cup, Krupa, led by manager
Slobodan Starčević, got to the
cup final losing to
Željezničar in two matches (2–0 at
Sarajevo and 2–4 at
Krupa na Vrbasu), thus finishing as runners-up. In the
2018–19 Bosnian Premier League season, Krupa finished on 11th place and it got relegated back to the First League of RS. Then, in the
2019–20 First League of RS season, the club secured promotion back to the Premier League, though after the season was ended abruptly due to the
COVID-19 pandemic in Bosnia and Herzegovina, and by default Krupa finished in 1st place and got promoted. In the
2020–21 Premier League season, Krupa initially avoided relegation to the First League of RS, but were then relegated back to the league due to failing to obtain a license for the Premier League. ==Honours==