The majority of the Company's inventories are valued on the last-in, first-out (LIFO) method and stated at the lower of cost or market. Current cost approximates replacement cost, or market, and LIFO cost is determined at the end of each fiscal year based on inventory levels on-hand at current replacement cost and a LIFO reserve. The Company uses the simplified LIFO method, under which the LIFO reserve is determined utilizing the inflation factor specified in the Producer Price Index for Machinery and Equipment – Pumps, Compressors and Equipment, as published by the U.S. Bureau of Labor Statistics. Interim LIFO calculations are based on management's estimate of the expected year-end inflation index and, as such, are subject to adjustment each quarter including the fourth quarter when the inflation index for the year is finalized. If inflation causes the Producer Price Index for Machinery and Equipment – Pumps, Compressors and Equipment to increase in future periods, the LIFO reserve will increase with a corresponding increase to non-cash LIFO expense which may negatively impact the Company's operating results.
In 2023, 2022, and 2021, the Company recorded pre-tax non-cash LIFO expense of $6.9 million, $18.0 million, and $6.7 million, respectively. See Note 4 to the Consolidated Financial Statements, Inventories.
As of December 31, 2023 we had a LIFO reserve of $95.1 million, which at the current U.S. Corporate tax rate, represents approximately $20.0 million of income taxes, payment of which is delayed to future dates based upon changes in inventory costs. From time-to-time, discussions regarding changes in U.S. tax laws have included the potential of LIFO being repealed. Should LIFO be repealed, the $20.0 million of postponed taxes, plus any future benefit realized prior to the date of repeal, would likely have to be repaid over some period of time. Repayment of these postponed taxes will reduce the amount of cash that we would have available to fund our operations, working capital, capital expenditures, acquisitions, or general corporate or other business activities. This could materially and adversely affect our business, financial condition and results of operations,