Ameresco, Inc. Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2022

Changes in the allowance for credit losses was as follows:


	Year Ended December 31,
	2022		2021		2020
Allowance for credit loss, beginning of period	$	2,263	$	2,266	$	2,260
(Recoveries of) charges to costs and expenses, net	(382)		187		282
Account write-offs and other	(970)		(190)		(276)
Allowance for credit loss, end of period	$	911	$	2,263	$	2,266

Depreciation and amortization of property and equipment are computed on a straight-line basis over the following estimated useful lives:


Asset Classification						Estimated Useful Life
Furniture and office equipment						Five years
Computer equipment and software costs						Three to five years
Leasehold improvements						Lesser of term of lease or five years
Automobiles						Five years
Land						Unlimited

Property and equipment, net consisted of the following:


	December 31,
	2022		2021
Furniture and office equipment	$	3,023	$	3,008
Computer equipment and software costs	22,179		17,593
Leasehold improvements	2,483		2,472
Automobiles	1,896		1,419
Land	6,781		6,781
Property and equipment, gross	36,362		31,273
Less: accumulated depreciation	(20,655)		(18,156)
Property and equipment, net	$	15,707	$	13,117

The following table sets forth our depreciation expense on property and equipment:


	Year Ended December 31,
Location	2022		2021		2020
Selling, general & administrative expenses	$	2,665	$	3,143	$	3,317