Is it ethical for a company to assume assets are in use on the first day of the following month after they are purchased when computing depreciation? For example, if assets were purchased Feb. 8, but they are recorded in use starting March 1. I know the previous rule for depreciation assumes all assets are in use on the first day of the month closest to the purchase date. I didn't know if it was okay to do it the following month or not? Also, if assets were assumed in use on the following month, would this increase the profit margin?