decision to outsource maintenance and security of the Company’s information technology functions, which had previously been handled internally. The increase in loan expenses was due primarily to the indirect auto loan program and the increase in lending volume during the period.
Noninterest expense can be expected to increase because of compensation costs related to possible implementation of one or more stock-based benefit plans, if approved by our stockholders.
Income Taxes. Income taxes decreased by $49,000, or 66.6%, to $24,000 for the three months ended June 30, 2024, compared to $73,000 for the three months ended June 30, 2023. The decrease in the income tax provision was due primarily to a $192,000, or 53.2% decrease in pretax income. The effective tax rates were 14.4% and 19.8% for the three months ended June 30, 2024 and 2023, respectively.
Comparison of Operating Results for the Nine Months Ended June 30, 2024 and 2023
General. Net income for the nine months ended June 30, 2024, was $447,000, a decrease of $482,000, or 51.9%, compared to $930,000 for the nine months ended June 30, 2023. The decrease in net income was primarily due to a $783,000 increase in noninterest expenses and a $68,000 increase in the provision for credit losses, which were partially offset by a $208,000 increase in net interest income, a $38,000 increase in noninterest income and an $122,000 decrease in income taxes.
Interest Income. Interest income increased $1.6 million, or 37.2%, to $6.0 million for the nine months ended June 30, 2024, from the nine months ended June 30, 2023. This increase was primarily attributable to a $1.6 million, or 42.7%, increase in interest on loans receivable, partially offset by a $55,000, or 18.3%, decrease in interest on interest-bearing deposits and other assets.
The average balance of loans increased by $22.9 million, or 19.2%, during the nine months ended June 30, 2024, from the balance for the nine months ended June 30, 2023, while the average yield on loans increased by 85 basis points to 5.15% for the nine months ended June 30, 2024 from 4.30% for the nine months ended June 30, 2023. The increase in average yield on loans reflects the increase in the overall interest rate environment year to year. As interest rates began to increase during the Bank’s fiscal 2022 year, and as these increases continued during 2023, the interest rates on the Bank’s adjustable-rate loans have adjusted upward.
The average balance of investment securities decreased $1.6 million to $12.5 million for the nine months ended June 30, 2024, from $14.1 million for the nine months ended June 30, 2023, while the average yield on investment securities increased by 55 basis points to 2.43% for the nine months ended June 30, 2024 from 1.88% for the nine months ended June 30, 2023.
Interest income on other interest-bearing deposits, comprised primarily of certificates of deposit in other financial institutions, overnight deposits and stock in the Federal Home Loan Bank, decreased $55,000, or 37.2%, for the nine months ended June 30, 2024, due to a decrease in the average balance of $3.5 million, partially offset by a 103 basis point increase in the average yield, to 5.06% for the nine months ended June 30, 2024 from 4.03% for the nine months ended June 30, 2023. The increase in average yield was due to the increase in interest rates in the overall economy year-to-year.
Interest Expense. Total interest expense increased $1.4 million, or 411.0%, to $1.7 million for the nine months ended June 30, 2024, from $342,000 for the nine months ended June 30, 2023. Interest expense on deposits increased $929,000, or 304.5%, due primarily to an increase of 107 basis points in the average cost of deposits to 1.43% for the nine months ended June 30, 2024 from 0.36% for the nine months ended June 30, 2023, and an increase of $825,000, or 0.7%, in the average balance of interest-bearing deposits to $115.1 million for the nine months ended June 30, 2024 from $114.3 million for the nine months ended June 30, 2023.
Interest expense on borrowings increased $475,000, or 1,303%, to $511,000 for the nine months ended June 30, 2024, compared to $36,000 for the nine months ended June 30, 2023. The increase was due to a 342 basis point increase in the weighted-average rate, to 4.92% for the nine months ended June 30, 2024 and a $10.7 million increase in the