was negatively impacted by key benchmark mortgage rates used in the valuation that declined, as well as an increase in the discount rate to reflect secondary market servicing conditions. The impact of principal payments on the underlying mortgages on the mortgage servicing rights was $570,000 and $747,000 for the quarters ended December 31, 2022 and September 30, 2022, respectively.
Total noninterest income decreased $9.3 million, or 48.3%, compared to the quarter ended December 31, 2021, primarily due to a $11.2 million, or 84.9%, decrease in mortgage banking income, driven by the decrease in loan closings and narrowing gain-on-sale margins.
Noninterest Expense
Total noninterest expenses were $34.6 million for the quarter ended December 31, 2022, an increase of $171,000, or 0.5%, from the quarter ended September 30, 2022. Other expenses increased $1.1 million, or 31.9% for the quarter ended December 31 2022, primarily as a result of a legal settlement. In the fourth quarter of 2022, the Company reached an agreement-in-principle to settle a purported class action lawsuit concerning overdraft fees on re-presented transactions. The matter was filed in the Massachusetts Superior Court in June 2022, and it is expected to be refiled in federal court for final settlement purposes, where the settlement remains subject to court approval. As of December 31, 2022, the Company estimated the settlement expense, including related costs, to be $950,000. The increase was offset by an $887,000, or 4.2%, decrease in compensation expense, primarily reflecting a $715,000 decrease in salaries and mortgage origination commissions.
Total noninterest expenses decreased $3.5 million, or 9.3%, from the quarter ended December 30, 2021. Compensation and benefits decreased $4.5 million and loan expenses decreased $563,000, consistent with the decrease in residential mortgage loan closings and corresponding decrease in mortgage origination commissions. The decrease in compensation and benefits also reflects the impact of proactive cost reduction measures taken at HarborOne Mortgage, LLC beginning in the second quarter of 2021.
Income Tax Provision
The effective tax rate for the quarter and year ended December 31, 2022 was 22.4% and 26.1%, respectively, compared to 23.2% and 27.3% for the quarter and year ended December 31, 2021. The 2022 effective tax rate was impacted by a tax benefit recorded for Industrial Revenue Bonds and a reserve release upon the expiration of the statute of limitations.
Asset Quality and Allowance for Credit Losses
Effective January 1, 2022, the Company adopted Accounting Standards Update No. 2016-13, commonly referred to as CECL, which requires the measurement of expected lifetime credit losses for financial assets measured at amortized cost, as well as unfunded commitments that are considered off-balance sheet credit exposures. CECL requires that the allowance for credit losses (“ACL”) be calculated based on current expected credit losses over the full remaining expected life of the financial assets and also consider expected future changes in macroeconomic conditions. Upon adoption of CECL on January 1, 2022, the Company’s ACL on loans decreased by $1.3 million, and the ACL on unfunded commitments increased by $3.9 million, for a net increase of $2.6 million. The after-tax impact of $1.9 million was recognized as a one-time, cumulative-effect adjustment that decreased retained earnings.
Credit quality performance continued to be strong with total nonperforming assets of $14.8 million at December 31, 2022, compared to $23.4 million at September 30, 2022 and $36.2 million at December 31, 2021. Nonperforming assets as a percentage of total assets were 0.28% at December 31, 2022, 0.47% at September 30, 2022, and 0.79% at December 31, 2021. During 2022, two large commercial credits were resolved, reducing nonperforming assets significantly.
The provision for funded loan credit losses for the quarter and year ended December 31, 2022 was $2.7 million and $4.7 million, respectively, and reflects provisioning for loan growth partially offset by a reduction in pandemic-related uncertainty. Net charge-offs totaled $2.1 million, or 0.19%, and $3.5 million, or 0.09%, of average loans outstanding on an annualized basis, for the quarter and year ended December 31, 2022, respectively. Net recoveries totaled $799,000, or 0.08% of average loans outstanding on an annualized basis, for the quarter ended September 30, 2022, and net charge-offs totaled $1.2 million, or 0.13% of average loans outstanding on an annualized basis, for the quarter ended December 31, 2021.
The ACL was $45.2 million, or 0.99% of total loans, at December 31, 2022, compared to $44.6 million, or 1.06% of total loans, at September 30, 2022 and an allowance for loss under the incurred loss model of $45.4 million, or 1.26% of total loans, at December 31, 2021. The ACL on unfunded commitments, included in other liabilities on the unaudited Consolidated Balance Sheets, amounted to $4.9 million at December 31, 2022 as compared to $5.5 million at September 30, 2022, reflecting a negative provision of $575,000 for the quarter ended December 31, 2022. For the year ended December 31, 2022, the provision for unfunded commitments was $966,000, and there was no ACL on unfunded commitments at December 31, 2021. The decrease from the prior quarter primarily reflects the movement of commercial loans from construction loans to permanent loans.
We have not experienced any significant negative trends in the at-risk sectors previously identified in response to conditions that developed during the COVID-19 pandemic; however management continues to monitor certain credit types within those sectors that may be susceptible to increased credit risk as a result of trends that were precipitated by the COVID-19 pandemic and may be exacerbated by current economic conditions. Management is focused on loans secured by business-oriented hotels, non-anchored retail space and metro office space. As of December 31, 2022, business-oriented hotels loans included 12 loans with a total outstanding balance of $86.0