The objective of this study was to assess the impact of the Enhanced Recovery After Surgery (ERAS) programme implementation on treatment costs at a university-type centre, using the DRG scheme. Retrospective analysis of patients' data in a group of 604 individuals enroled in the study. We evaluated three groups of patients according to the ERAS clinical protocol (CP): (1) CP oncogynaecology, (2) CP simple hysterectomy, (3) CP laparoscopy. The study aimed to evaluate the impact on the length of stay (LOS), savings in bed-days, and the reduction in direct treatment costs. Three parameters-antibiotic consumption, blood derivative consumption and laboratory test costs-were chosen to compare direct treatment costs. The statistical significance of the difference in the observed parameters was tested by a two-sample unpaired t test with unequal variances at the 0.05 significance level. We analysed data from 604 patients. In all three groups, the length of stay (LOS) was significantly reduced. The most significant reduction was observed in the CP oncogynaecology group, where the LOS was reduced from 11.1 days to 6.8 days (2022) and 7.6 days (2023) compared to 2019 (p < 0.05). Furthermore, there was a notable reduction in inpatient bed-days, which resulted in the capacity being made available to admit additional patients. A statistically significant reduction in direct costs was observed in the group of CP hysterectomy (antibiotic use) and in the CP laparoscopy (laboratory test costs). The implementation of the ERAS principles resulted in a number of significant positive economic impacts-reduction in the LOS and a corresponding increase in bed capacity for new patients. Additionally, direct treatment costs, including those related to antibiotic use or laboratory testing were reduced. The Czech Republic's acute healthcare system, like the majority of European healthcare systems, is financed by the DRG system. This flat-rate payment per patient encourages hospital management to seek cost-reduction strategies. The results of our study indicate that fast-track protocols represent a potential viable approach to reducing the cost of treatment while simultaneously meeting the recommendations of evidence-based medicine.