It is predicted third level grant applications will exceed 100,000 for the upcoming academic year.
Susi are urging anyone who has not filled out their submission to do so by this Thursday's deadline.
Over 80,000 applications have been received to date, with over 10,000 new students being awarded funding.
Head of Communications with SUSI, Graham Doyle, has said anyone who is not sure if they are eligible can find out on their website.
"There is a section on our home page called a grant eligibility reckoner. It sounds a lot more complicated than it actually is but it's a really quick tool where students can self assess whether they may or may not be entitled to a grant," he said.
"It takes on average over two minutes to complete. I would encourage students to use it and see if they are eligible for a grant."
"We've got over 50% of our applications already completed and we've awarded grants to more than 41,000 students.
"Of those 41,000, a lot of them would be renewing their grant from previous years but we've over 10,500 new students, the vast majority of these are leaving cert students."