Deposits decreased $94.6 million, or 12.6%, to $657.4 million at September 30, 2022 from $752.0 million at June 30, 2022. Noninterest bearing demand accounts decreased $50.5 million, or 48.1%, to $54.5 million and certificates of deposit, excluding brokered certificates of deposit, decreased $16.5 million, or 6.7%, to $230.5 million, and savings, NOW, and money market accounts decreased $32.7 million, or 8.2%, to $363.9 million, while brokered certificates of deposit increased $5.0 million, or 140.2%, to $8.6 million. The large decrease in noninterest bearing demand accounts was due to approximately $57.6 million in deposits from a public entity that collects real estate taxes that were on deposit at June 30, 2022 and withdrawn in the three months ended September 30, 2022, when tax monies were distributed. Repurchase agreements increased $476,000, or 5.1%, to $9.7 million at September 30, 2022 from $9.2 million at June 30, 2022. Borrowings consisted of advances from the Federal Home Loan Bank of Chicago, which increased $48.0 million to $63.0 million at September 30, 2022 from $15.0 million at June 30, 2022.
Advances from borrowers for taxes and insurance increased $279,000, or 55.5%, to $782,000 at September 30, 2022 from $503,000 at June 30, 2022, accrued interest payable increased $31,000, or 17.6%, to $207,000 at September 30, 2022 from $176,000 at June 30, 2022, and allowance for credit losses on off-balance sheet credit exposures increased $476,000 to $476,000 at September 30, 2022 from $0 at June 30, 2022, while other liabilities decreased $1.2 million, or 18.4%, to $5.2 million at September 30, 2022 from $6.3 million at June 30, 2022. The increase in advances from borrowers for taxes and insurance was attributable to the timing of the payment of real estate taxes and insurance, while the increase in accrued interest payable was mostly due to an increase in average balances of deposits and an increase in the average rates on deposits. The increase in the allowance for credit losses on off-balance sheet credit exposures was the result of the adoption of ASU 2016-13, effective July 1, 2022. The decrease in other liabilities was a result of accrued compensation and benefits that were paid out in the three months ended September 30, 2022.
Total equity decreased $4.2 million, or 5.8%, to $67.5 million at September 30, 2022 from $71.7 million at June 30, 2022. Equity decreased primarily due to a decrease of $5.7 million in accumulated other comprehensive income (loss), net of tax, a decrease of $388,000 due to the adoption of ASU 2016-13 effective July 1, 2022, and the accrual of approximately $667,000 in dividends to our shareholders. The decrease in accumulated other comprehensive income (loss) was mostly due to unrealized depreciation on available-for-sale securities, net of tax. These decreases were partially offset by net income of $2.0 million, and ESOP and stock equity plan activity of $596,000.
Comparison of Operating Results for the Three Months Ended September 30, 2022 and 2021
General. Net income increased $78,000 to $2.0 million net income for the three months ended September 30, 2022 from $1.9 million net income for the three months ended September 30, 2021. The increase was primarily due to an increase in net interest income, partially offset by a decrease in noninterest income, an increase in noninterest expense and a decrease in credit for credit losses.
Net Interest Income. Net interest income increased by $678,000, or 12.2%, to $6.3 million for the three months ended September 30, 2022 from $5.6 million for the three months ended September 30, 2021. The increase was due to an increase of $827,000 in interest income, partially offset by an increase of $149,000 in interest expense. Our net interest margin increased by 24 basis points to 3.26% for the three months ended September 30, 2022 compared to 3.02% for the three months ended September 30, 2021, while our interest rate spread increased by 24 basis points to 3.19% for the three months ended September 30, 2022 compared to 2.95% for the three months ended September 30, 2021. A $29.3 million, or 4.0%, increase in the average balance of interest earning assets was offset by a $45.6 million, or 7.4%, increase in the average balance of interest-bearing liabilities.
Interest Income. Interest income increased by $827,000, or 13.2%, to $7.1 million for the three months ended September 30, 2022, from $6.3 million for the three months ended September 30, 2021. The increase in interest income was primarily due to a $317,000 increase in interest income on loans, a $449,000 increase in interest income on securities and a $61,000 increase in other interest income. The increase in interest income on loans resulted from a 9 basis point, or 2.3%, increase in the average yield on loans to 4.16% for the three months ended September 30, 2022, from 4.07% for the three months ended September 30, 2021, and a $18.8 million, or 3.6%, increase in the average balance of loans to $538.4 million for the three months ended September 30, 2022, from $519.6 million for the three months ended September 30,
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