How does the LIFO method affect gross profit margin compared to FIFO in periods of rising costs?

In periods of rising costs, the LIFO method results in higher cost of sales and lower gross profit margins compared to FIFO. This is because LIFO allocates the most recent, higher costs to cost of goods sold, leaving older, lower-cost inventory on the balance sheet.

The LIFO method affects gross profit margin negatively in periods of rising costs. Specifically, it results in higher cost of sales due to the most recent inventory costs being recognized first. In contrast, FIFO recognizes older, lower costs first, leading to a higher gross profit margin. Therefore, companies using LIFO will report lower gross profit margins compared to those using FIFO during inflationary periods.