Average interest-earning assets for the third quarter of 2011 decreased to $430.9 million, down $91.0 million from the third quarter of 2010. The decrease in average interest-earning assets resulted in a $1.1 million reduction in interest income. The annualized yield on our average interest-earning assets increased 10 basis points to 5.80% for the third quarter of 2011, from 5.70% for the same period a year ago. The 10 basis point increase in the annualized yield on our average interest-earning assets resulted in an increase of $82 thousand in interest income.
Average interest-bearing liabilities for the third quarter of 2011 decreased to $402.7 million, down $86.9 million from the third quarter of 2010. The decrease in average interest-bearing liabilities resulted in a $442 thousand reduction in interest expense. The annualized cost of our average interest-bearing liabilities decreased 3 basis points to 1.90% for the third quarter of 2011 from an annualized cost of 1.93% for the same period a year ago, and resulted in a decrease of $9 thousand in interest expense.
The provision for loan losses for the third quarter of 2011 totaled $3.8 million compared to $1.7 million for the same period a year ago. The $3.8 million provision for loan losses in the third quarter of 2011 primarily reflected the full charge-off of a single commercial loan relationship totaling $3.6 million, of which $924 thousand was reserved for at June 30, 2011. The third quarter provision was also impacted by specific loss allocations on loans that became impaired during the quarter and other collateral dependent loans for which recent valuation of the underlying collateral reflected decrease in values.
Non-interest income for the quarter ended September 30, 2011 totaled $114 thousand compared to $1.0 million for the third quarter of 2010. The $909 thousand decrease from the third quarter of 2010 was primarily due to a $750 thousand financial assistance award received in the third quarter of 2010 from the U.S. Department of the Treasury’s Community Development Financial Institutions (CDFI) Fund. Also contributing to lower non-interest income in the third quarter of 2011 were lower service charges and higher net losses on mortgage banking activities.