Introduction: Procrastination is the act of delaying necessary tasks to the extreme of experiencing discomfort and negative consequences for the individuals. The presence of nontraditional students at universities is a phenomenon which has increased remarkably over the last decades. This type of university students finds some difficulties during their studies, which could result in a higher prevalence of procrastination behaviors among nontraditional college students. To test this, our work compares procrastination levels and reasons to procrastinate among traditional and nontraditional students. Method: A sample of 479 Colombian college students was used. Procrastination and the reasons to procrastinate are measured by the "Procrastination Assessment Scale-Students" ("PASS"). The data analysis is based on descriptive statistics, exploratory factorial analysis, ttest for independent samples and Cohen's d. Results: Nontraditional students show higher procrastination levels (t = 4,412; p < 0,001; d = 0,459), although their reasons to procrastinate are similar to those of traditional students. The nontraditional student condition is a demographic variable relevant for explaining academic procrastination. Discussion and Conclusion: These results suggest the convenience of offering academic counseling and guidance to nontraditional students, to attend procrastination and thus reduce low achievement or dropout risks.