Kapur's four-shot victory at Al Badia Golf Club meant he jumped from 20th to third in the Challenge Tour rankings, claiming one of the 15 cards available on the main tour next season.
And Scotland's Jamie McLeary will also contest the Race to Dubai after doing exactly what he needed to with a share of second place alongside Portugal's Jose-Filipe Lima.
Italy's Andrea Pavan finished joint fourth to wrap up the title of Challenge Tour number one, following in the footsteps of the likes of Thomas Bjorn (1995), Henrik Stenson (2000), Edoardo Molinari (2009) and Tommy Fleetwood (2011).
Kapur, 32, said: "I'm really pleased. It was a tough week and I had to battle away. I knew today was going to be hard.
"I made it a little hard on myself this year not playing as many tournaments as some other players on the Challenge Tour but I backed myself and told myself that if I played well enough I would make it back on to the European Tour."
McLeary felt he needed outright second to claim one of the 15 cards and feared the worst when Lima birdied the last to join him on 12 under, but it was eventually confirmed that he had done enough.
"I'm delighted," the 32-year-old from Edinburgh said after a closing 69. "To finish the way I did was nice. I knew it was going to be a tough day and I kind of knew the score I wanted to shoot
"I worried that I would never make it to The European Tour, that I was one of those guys that was really consistent but without the big finishes at the big events that I needed. It has taken a lot longer than I thought it would, and the older you
get the more nervous you get, but I've got my chance and I'm confident I'll take it.
"I'm just delighted I've finally made it to The European Tour after six or seven years. It's been a long road but I got there."
American Daniel Im and England's Sam Walker of England were the unfortunate ones to miss out as they dropped out of the top 15 from 13th and 14th place respectively.