primarily attributable to the Company’s lower pre-tax results for the three months ended September 30, 2025, which yields higher volatility in the items impacting the effective tax rate when compared to prior periods and the release of uncertain tax positions in the current year.
As we continue to monitor the implications of potential tax legislation in each of our jurisdictions, we may adjust our estimates and record additional amounts for tax assets and liabilities. Any adjustments to our tax assets and liabilities could materially impact our provision for income taxes and our effective tax rate in the periods in which they are made.
Nine months ended September 30, 2025 compared to the nine months ended September 30, 2024
Revenue. Revenue increased $111.6 million, or 4.7%, to $2,491.3 million for the nine months ended September 30, 2025 from $2,379.7 million for the nine months ended September 30, 2024. The nine months ended September 30, 2025, included $65.6 million of revenue for one state government program based on timing of program approval. Same facility revenue increased $118.3 million, or 5.1%, for the nine months ended September 30, 2025 compared to the nine months ended September 30, 2024, resulting from same facility growth in revenue per day of 3.3%, same facility growth in patient days of 1.8%, and same facility growth in admissions of 2.3%. Consistent with same facility revenue growth in 2024, the growth in same facility patient days for the nine months ended September 30, 2025 compared to the nine months ended September 30, 2024 resulted from the addition of beds to our existing facilities and ongoing demand for our services.
Salaries, wages and benefits. SWB expense was $1,359.9 million for the nine months ended September 30, 2025 compared to $1,265.4 million for the nine months ended September 30, 2024, an increase of $94.4 million. SWB expense included $25.3 million and $27.0 million of equity-based compensation expense for the nine months ended September 30, 2025 and 2024. Excluding equity-based compensation expense, SWB expense was $1,334.6 million, or 53.6% of revenue, for the nine months ended September 30, 2025, compared to $1,238.4 million, or 52.0% of revenue, for the nine months ended September 30, 2024. Same facility SWB expense was $1,186.8 million for the nine months ended September 30, 2025, or 48.7% of revenue, compared to $1,118.9 million for the nine months ended September 30, 2024, or 48.2% of revenue.
Professional fees. Professional fees were $147.1 million for the nine months ended September 30, 2025, or 5.9% of revenue, compared to $142.2 million for the nine months ended September 30, 2024, or 6.0% of revenue. Same facility professional fees were $124.4 million for the nine months ended September 30, 2025, or 5.1% of revenue, compared to $122.0 million for the nine months ended September 30, 2024, or 5.3% of revenue.
Supplies. Supplies expense was $87.3 million for the nine months ended September 30, 2025, or 3.5% of revenue, compared to $84.2 million for the nine months ended September 30, 2024, or 3.5% of revenue. Same facility supplies expense was $84.2 million for the nine months ended September 30, 2025, or 3.5% of revenue, compared to $81.4 million for the nine months ended September 30, 2024, or 3.5% of revenue.
Rents and leases. Rents and leases were $36.0 million for the nine months ended September 30, 2025, or 1.4% of revenue, compared to $36.1 million for the nine months ended September 30, 2024, or 1.5% of revenue. Same facility rents and leases were $31.8 million for the nine months ended September 30, 2025, or 1.3% of revenue, compared to $32.1 million for the nine months ended September 30, 2024, or 1.4% of revenue.
Other operating expenses. Other operating expenses consisted primarily of purchased services, utilities, insurance, provider taxes, travel and repairs and maintenance expenses. Other operating expenses were $377.2 million for the nine months ended September 30, 2025, or 15.1% of revenue, compared to $322.9 million for the nine months ended September 30, 2024, or 13.6% of revenue. Same facility other operating expenses were $339.2 million for the nine months ended September 30, 2025, or 13.9% of revenue, compared to $300.5 million for the nine months ended September 30, 2024, or 12.9% of revenue.
Depreciation and amortization. Depreciation and amortization expense was $143.5 million for the nine months ended September 30, 2025, or 5.8% of revenue, compared to $110.1 million for the nine months ended September 30, 2024, or 4.6% of revenue.
Interest expense. Interest expense was $100.9 million for the nine months ended September 30, 2025 compared to $86.3 million for the nine months ended September 30, 2024. The increase in interest expense was primarily the result of interest on the 7.375% Senior Notes issued during the first quarter of 2025.
Debt extinguishment costs. Debt extinguishment costs were $1.3 million for the nine months ended September 30, 2025 related to the refinancing of the Prior Credit Facility.
Legal settlements expense. Legal settlements expense was $3.5 million for the nine months ended September 30, 2025 related to costs associated with the Desert Hills Litigation.
Loss on impairment. During the nine months ended September 30, 2025, we recorded non-cash property impairment charges of $1.5 million related to certain closed facilities. During the nine months ended September 30, 2024, we recorded non-cash property