The article explores how the time to maturity of loans affects portfolio credit risk in financial models. The researchers introduce two new approaches to address this issue within the Vasicek-model, focusing on the impact of loan maturity on credit risk. By analyzing data from four rating agencies, they found that credit risk increases with the maturity of a loan, aligning closely with parameters used in Basel II's maturity adjustment. This study enhances understanding of economic capital allocation for long-term loans.