Are you looking for a hard and fast rule about what income is taxable and what income is not taxable? The fact is that all income is taxable unless the law specifically excludes it.
Taxable income includes money you receive, such as wages and tips. It can also include non-cash income from property or services. For example, both parties in a barter exchange must include the fair market value of goods or services received as income on their tax return.
Some types of income are not taxable except under certain conditions, including:
Here are some types of income that are usually not taxable: