Loans receivable decreased $55.8 million from the year-ended December 31, 2020, due primarily to the $78.8 million decrease in PPP loans resulting from loan forgiveness. For the three months and year ended December 31, 2021, net charge-offs totaled $111,000 and $907,000, respectively, compared to $125,000 and $809,000, respectively, for the corresponding periods in 2020.
Net interest income, on a fully taxable equivalent basis (fte), totaled $16,671,000 for the three months ended December 31, 2021, an increase of $850,000 compared to the same period in 2020. For the year ended December 31, 2021, net interest income (fte) totaled $66,100,000, an increase of $14,741,000 compared to 2020, due primarily to the higher volume of earning assets, including a $209.1 million increase in average loans outstanding. Loan origination fees related to PPP loans increased $3,072,000 compared to the 2020 total.
Other income for the three months ended December 31, 2021 totaled $2,021,000 compared to $2,661,000 for the similar period in 2020. Gains on the sale of loans and securities decreased $205,000, while service charges and fees decreased $488,000. All other items of other income increased $53,000, net. Other income for the year ended December 31, 2021 totaled $8,325,000 compared to $7,780,000 in 2020, an increase of $545,000 due primarily to a $578,000 increase in service charges and fees. Gains on the sale of loans and investment securities decreased $329,000 in the aggregate, while all other items of other income increased $296,000, net.
Other expenses totaled $10,042,000 for the three months ended December 31, 2021, compared to $9,909,000 in the similar period of 2020. For the year ended December 31, 2021, other expenses totaled $38,578,000 compared to $34,440,000 for 2020, an increase of $4,138,000. The increase reflects the costs of operations acquired from UpState, including four new Community Offices.