The Bantams will return to Wembley three months after their famous Capital One Cup final appearance and are determined to cap one of the most memorable seasons in the club's history with promotion after spending the last six in the bottom tier.
"For us and for Northampton it will mean a hell of a lot to get promoted," said Parkinson. "A lot of things will fall into place at this club if we do get over the line.
"If we don't, then this squad has got a lot of young, energetic players who are going to keep improving and we'll mount a challenge next year.
"In saying that, that won't detract from our determination to do the job, but it's not the end of the world if it doesn't happen because this squad is a strong one."
Bradford's players vowed to return to Wembley this season after their 5-0 Capital One Cup final defeat to Swansea and lost only two of their remaining 15 league games to secure the final play-off place.
"We're going down there with a focus to finish the job off," Parkinson added.
"My job with the rest of the staff is to get as many players as possible playing at their best as a team. If we do that we'll have a good chance."