Capitalized software development costs, net consisted of the following (in thousands):


	Gross carrying amount		Amortization period	Accumulated amortization			Net carrying amount
As of September 30, 2023	$	59,515	3 years	$	(28,814	)	$	30,701
As of December 31, 2022		92,115	3 years		(64,745	)		27,370

The Company capitalized software development costs of $15.3 million and $13.3 million for the nine months ended September 30, 2023 and 2022, respectively.

Amortization expense for capitalized software development costs was $4.2 million and $2.9 million for the three months ended September 30, 2023 and 2022, respectively. Amortization expense for capitalized software development costs was $11.9 million and $8.4 million for the nine months ended September 30, 2023 and 2022, respectively. Amortization of capitalized software development costs is classified within cost of revenue in the condensed consolidated statements of operations. During the nine months ended September 30, 2023, the Company retired $47.9 million of fully amortized capitalized software development assets.

The expected amortization of capitalized software development costs, as of September 30, 2023, for each of the following years is as follows (in thousands):



2023 (for the remaining three months)	$	4,248
2024		13,953
2025		9,285
2026		3,215
	$	30,701