The IRS has announced that the interest rates applicable to overpayments and underpayments of federal taxes are the same in the fourth quarter of 2020 as they were in the third quarter of 2020 (Rev. Rul. 2020-18). The rates are:
Depreciation methods that allow faster write-offs than straight-line rates in the earlier periods of the useful life of an asset. For example, in the first few years of recovery, MACRS allows a 200% double declining balance write-off, twice the straight-line rate.