Most income is taxable, whether you earn it or are paid as a return on your investment. Also, you generally have to pay tax on income when you sell something for more than your basis (usually the amount you paid for something).
If a type of income is taxable, it doesn't matter if you receive payment in cash, by check or electronic payment, or in the form of goods or services. You still pay tax on it.
Certain types of income are excluded from tax. This generally includes income you or someone else has already paid tax on, or income from special situations, such as combat pay.
Check this list to see if you have to pay tax on various types of income you may receive:
Dividends are not taxable when they are a return of capital. In other words, you don't pay tax when you are receiving back part of your investment, because it is not a share of profits.
May 10 — Employees who work for tips
If you received $20 or more in tips during April, report them to your employer Details
May 10 — Social security, Medicare, and withheld income tax
File Form 941 for the first quarter of 2018. This due date applies only if you deposited the tax for the quarter timely, properly, and in full.
May 15 — Social security, Medicare, and withheld income tax
If the monthly deposit rule applies, deposit the tax for payments in April.