Contributions to an IRA are based on earned income, which includes net earnings from self-employment. If you have a qualified retirement plan, such as a SEP, for your business, you can contribute to a deductible IRA only if your modified adjusted gross income (MAGI) level is below a set amount. If you don’t have a plan, there’s no MAGI limit for making a deductible IRA contribution. Or, you may choose to make a Roth IRA contribution (nondeductible), but there are MAGI limits whether or not you have a qualified plan.
A statutory method of depreciation allowing accelerated rates for most types of property used in business and income-producing activities during the years 1981 through 1986. It has been superseded by the modified accelerated cost recovery system (MACRS) for assets placed in service after 1986.