Much of the recent legislation increasing regulation and consequently production costs on the state's diminishing refinery base has been largely based on contentions related to refinery gross margins (refinery operating income less crude oil costs) as tracked by the Energy Commission tax and fee data (reported here monthly as indicated below). The new reporting as mandated by SB X1-2 (2023) provides additional details on the refinery margins, with monthly data on net margins (gross margin less operating costs) now available. The Energy Commission has defined operating costs to be those costs "incurred by the operator of a refinery in the state to produce gasoline meeting California specifications, including, but not limited to, costs of labor, electricity, natural gas, chemicals, maintenance, hydrogen, and other intermediate oil products, federal renewable identification numbers,
obligation costs, capital investments, logistics costs, and additive costs."
Net operating margin consequently captures the portion of gasoline and diesel prices flowing as income (as an industry) from refinery operations. It is not the same as profit. Profit instead is calculated as the summation of net operating income from all company operations less additional company-wide cost components including selling, general and administrative expenses, exploration expenses, depreciation, depletion and amortization, interest and debt costs, and taxes.
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