Background: Adolescence is a vulnerable period for those afflicted with inflammatory bowel disease (IBD). There is limited knowledge of factors influencing transition readiness in this population. We sought to determine whether self-efficacy and resilience would be informative predictors of transition readiness independent of age. Methods: Patients with IBD aged 16 to 23 years cared for in a pediatric setting were prospectively enrolled. On entry, patients filled out the Transition Readiness Assessment Questionnaire (TRAQ); IBD Self-Efficacy Scale-Adolescent (IBD-SES-A); and the Connor-Davidson Resilience Scale. Demographic data and disease-specific information were collected from the medical record and by the provider. General linear modeling and autocorrelation were performed to investigate predictors of transition readiness. Results: Eighty-seven patients (62 Crohn's disease and 25 ulcerative colitis) were included, with a median age of 19 years (interquartile range 1-3: 17-20; min-max: 16-23). After controlling for age, the IBD-SES-A predicted TRAQ [F(1) = 11.69, R-2 = 0.16, P = 0.001], accounting for 16% of the variance. The Connor-Davidson Resilience Scale also independently predicted TRAQ score [F(1) = 6.45, R-2 = 0.09, P = 0.01], accounting for 9% of the variance. The IBD-SES-A and Connor-Davidson Resilience Scale were significantly auto correlated (r = 0.044, P = 0.001); in the final predictive model, only IBD-SES-A was predictive of TRAQ [F(1) = 4.01, R-2 = 0.12, P = 0.004]. None of the patients' demographic, disease, or socioeconomic parameters informed transition readiness once self-efficacy and resilience were considered. Conclusions: This is the first study to identify a reliable predictor of transition readiness scores in adolescents with IBD that does not seem to be influenced by age.