increase of $2.4 million in SG&A expense was primarily attributable to increased employee-related costs compared to the first quarter of 2024.
Other income, net for the first quarter of 2025 totaled $2.6 million compared to other income, net of $3.3 million for the first quarter of 2024. The decrease was primarily attributable to a decrease in investment income in the first quarter of 2025.
Our effective income tax rate for the first quarter of 2025 was 33.6% compared to 90.3% for the first quarter of 2024. The decrease in our effective income tax rate was primarily attributable to reduced discrete tax benefits in the first quarter of 2025, primarily due to the reduction of an unrecognized tax benefit in the first quarter of 2024, with no comparable benefit recorded in the first quarter of 2025. The impact of discrete items on our effective income tax rate is greater when our pre-tax income or loss is lower. Additionally, our income tax rate typically differs from the federal statutory tax rate of 21% primarily due to state taxes as well as federal and state tax credits.
Fluctuations in Quarterly Operating Results
We historically have experienced significant fluctuations in our quarterly operating results, including losses or minimal income in the first quarter of each year, and expect such fluctuations to continue in the future. Our operating results may fluctuate due to a number of factors such as seasonality, wage limits on statutory payroll taxes, claims experience for workers’ compensation, demand for our services, and competition. Payroll taxes, as a component of cost of revenues, generally decline throughout a calendar year as the applicable statutory wage bases for federal and state unemployment taxes and Social Security taxes are exceeded on a per employee basis. Our revenue levels may be higher in the third quarter due to the effect of increased business activity of our customers’ businesses in the agriculture, food processing and forest products-related industries. In addition, revenues in the fourth quarter may be reduced by many customers’ practice of operating on holiday-shortened schedules. Workers’ compensation expense varies with both the frequency and severity of workplace injury claims reported during a quarter and the estimated future costs of such claims. Positive or adverse loss development of prior period claims during a subsequent quarter may also contribute to the volatility in the Company’s estimated workers’ compensation expense.
Liquidity and Capital Resources
The Company’s cash balance of $43.0 million, which includes cash, cash equivalents, and restricted cash, decreased $39.6 million for the three months ended March 31, 2025, compared to an increase of $13.0 million for the comparable period of 2024. The decrease in cash at March 31, 2025 as compared to December 31, 2024 was primarily due to the factors discussed below.
Net cash provided by operating activities for the three months ended March 31, 2025 amounted to $5.2 million, compared to cash provided of $9.0 million for the comparable period of 2024. For the three months ended March 31, 2025, net cash provided by operating activities was primarily due to increased premium payable of $15.9 million, increased accrued payroll and related benefits of $15.7 million, and increased payroll taxes payable of $15.4 million, largely offset by increased trade accounts receivable of $26.8 million, increased prepaid expenses of $10.8 million, and decreased workers’ compensation claims liabilities of $7.2 million.
Net cash used in investing activities for the three months ended March 31, 2025 totaled $32.0 million, compared to cash provided of $14.1 million for the comparable period of 2024. For the three months ended March 31, 2025, net cash used in investing activities consisted of purchases of investments and restricted investments of $39.2 million and purchases of property, equipment and software of $4.5 million, partially offset by proceeds from sales and maturities of investments and restricted investments of $11.7 million.
Net cash used in financing activities for the three months ended March 31, 2025 was $12.8 million, compared to cash used of $10.1 million for the comparable period of 2024. For the three months ended March 31, 2025, net cash used in financing activities primarily consisted of repurchases of common stock of $9.2 million, repurchases of common stock on the vesting of restricted stock units and performance awards of $2.3 million, and dividend payments of $2.1 million.