Selling, General and Administrative Costs (“SG&A”). SG&A primarily consists of salaries, benefits and incentive compensation for the selling, marketing, administrative and executive employees, non-cash stock based compensation expense and various other overhead expenses.
SG&A costs were $23.4 million and $46.8 million, for the second quarter and first six months of 2025, respectively, as compared to $18.0 million and $36.3 million for the same periods in 2024, respectively. This increase in the costs during the second quarter and first six months of 2025 was primarily due to increased non-cash stock based compensation from the stock price award program issuances (Note 7). SG&A costs as a percentage of total Company revenue were 30% during both the second quarter and first six months of 2025, respectively, as compared to 23% during the same periods in 2024, respectively.
Non-cash stock based compensation expense, included in SG&A, was $4.7 million and $9.5 million during the second quarter and first six months of 2025, respectively, as compared to $1.2 million and $2.4 million for the same periods in 2024, respectively. The increase in the second quarter and first six months of 2025 primarily relates to the non-cash stock compensation expense from the stock price award program issuances (Note 7).
Amortization expense was $231 thousand and $376 thousand for the second quarter and first six months of 2025, respectively, which was related to the intangible assets acquired in our September 2024 acquisition of LeewayHertz and May 2025 acquisition of Spend Matters. There was no intangible amortization for the same periods in 2024.
Segment Contribution. Segment contribution consists of the revenue generated by the segment, less the direct costs of revenue and selling, general and administrative expenses that are incurred directly by the segment. Items not allocated to the segment level include corporate costs related to the administrative functions that are performed in a centralized manner and that are not attributable to a particular segment. These administrative function costs include corporate general and administrative expenses, non-cash compensation, depreciation expense, interest expense and legal settlement and related costs.
Global S&BT segment contribution was $13.0 million and $25.8 million during the second quarter and first six months of 2025, respectively, as compared to $12.8 million and $22.8 million for the same periods in 2024, respectively. This increase during the second quarter and first six months of 2025 was primarily due to the revenue growth in our Gen AI consulting and implementation offerings, which were partially offset by weakness in our OneStream implementation offerings in 2025, as mentioned above.
Oracle Solutions segment contribution was $4.5 million and $8.8 million during the second quarter and first six months of 2025, respectively, as compared to $5.4 million and $10.6 million for the same periods in 2024, respectively. The decrease during the second quarter and first six months of 2025 was primarily due to decreased revenue, as discussed above, partially offset by decreased incentive compensation accruals related to performance.
SAP Solutions segment contribution was $3.9 million and $8.1 million during the second quarter and first six months of 2025, respectively, as compared to $3.3 million and $8.1 million for the same periods in 2024, respectively. The increase in segment contribution in the second quarter and first six months of 2025, as compared to the same periods in 2024, was primarily due to increased implementation revenue in 2025 that corresponds with the volume of software sales from the last several quarters.
Legal Settlement and Related Costs. In May 2023, Gartner, Inc. ("Gartner") filed a lawsuit seeking a preliminary injunction and damages against the Company and two ex-Gartner employees that were hired by us. On February 17, 2024, we, Gartner and the two ex-Gartner employees entered into a settlement agreement whereby we made a settlement payment of $985,000 to Gartner in exchange for a dismissal of the lawsuit and a release of all claims which is reflected in our Consolidated Statement of Operations for the year ended December 27, 2024. In addition, we incurred incremental legal costs related to the settlement which were recorded as expense in the period incurred.
Interest Expense, Net. Interest expense, net was $0.4 million and $0.6 million during the second quarter and first six months of 2025, respectively, as compared to $0.5 million and $1.0 million in the same periods in 2024, respectively. As of June 27, 2025, we had outstanding debt of $23.0 million, excluding debt issue costs. As of June 28, 2024, we had outstanding debt of $27.0 million, excluding debt issue costs.
Income Taxes. During the second quarter and first six months of 2025, we recorded $2.6 million and $3.6 million of income tax expense, respectively, related to certain federal, foreign and state taxes which reflected an effective tax rate of 60.7% and 43.0%, respectively. The increase in the effective tax rate is primarily due to the limitation of executive compensation deductions related to executive compensation, primarily driven by the stock price award program (Note 7). During the second quarter and first six months of 2024, we recorded $3.3 million and $5.6 million of income tax expense, respectively, related to certain federal, foreign and state taxes which reflected an effective tax rate of 27.1% and 24.2%, respectively.