Depreciation and Amortization
Depreciation and amortization for the nine months ended September 30, 2022 increased $4.6 million, or 56%, to $12.7 million compared to $8.2 million for the nine months ended September 30, 2021 due to higher stall count.
Gross Loss and Gross Margin
Gross loss for the nine months ended September 30, 2022 decreased by $0.5 million, or 9%, to $4.6 million compared to $5.0 million for the nine months ended September 30, 2021. Gross margin for the nine months ended September 30, 2022 was negative 16.7% compared to negative 33.2% for the nine months ended September 30, 2021. The change in gross margin was primarily due to higher revenue, including increased retail charging revenue, partially offset by increased cost of revenue and depreciation and amortization.
Operating Expenses
General and Administrative
General and administrative expenses for the nine months ended September 30, 2022 increased $43.7 million, or 95%, to $89.9 million compared to $46.2 million for the nine months ended September 30, 2021. The difference was driven by a $27.4 million increase in payroll expenses due to higher headcount and higher share-based compensation, a $4.7 million increase in legal service and professional service expenses, a $4.2 million increase in software expenses, a $4.0 million increase in loss on fixed asset disposals, and a $2.6 million increase in insurance expenses.
Depreciation, Amortization and Accretion
Depreciation, amortization and accretion expenses for the nine months ended September 30, 2022 increased $4.1 million, or 48%, to $12.5 million compared to $8.4 million for the nine months ended September 30, 2021. The increase was primarily due to higher intangible asset amortization as a result of the PlugShare acquisition and software amortization.
Operating Loss and Operating Margin
During the nine months ended September 30, 2022, EVgo had an operating loss of $107.0 million, an increase of $47.3 million, or 79%, compared to $59.7 million for the nine months ended September 30, 2021. Operating margin for the nine months ended September 30, 2022 was negative 392.2%, compared to negative 395.4% for the nine months ended September 30, 2021 The increase in operating loss period-over-period was primarily due to an increase in general and administrative expenses and depreciation and amortization, partially offset by the improvement in gross margin.
Interest Expense
For the nine months ended September 30, 2022, interest expense was de minimis. There was no interest expense for the nine months ended September 30, 2021.
Interest Expense, Related Party
There was no interest expense, related party for the nine months ended September 30, 2022. For the nine months ended September 30, 2021, interest expense, related party was $1.9 million. The decrease was related to conversion of the borrowings under the LS Power Note to equity on the CRIS Close Date.
Interest Income
Interest income for the nine months ended September 30, 2022 was $2.3 million. Interest income for the nine months ended September 30, 2021 was de minimis. The increase was a result of the interest earned on cash and cash equivalents and debt securities held by the Company during the nine months ended September 30, 2022.