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.
March 1 — Farmers & fishermen
File your 2018 income tax return (Form 1040) and pay any tax due Details
March 10 — Employees who work for tips
If you received $20 or more in tips during February, report them to your employer Details
March 15 — S Corporations
File a 2018 calendar year income tax return (Form 1120S) and pay any tax due Details
March 15 — S Corporation election
File Form 2553, Election by a Small Business Corporation, to elect to be treated as an S corporation beginning with calendar year 2018. If Form 2553 is filed late, S corporation treatment will begin with calendar year 2019.
March 15 — Partnerships
File a 2018 calendar year return (Form 1065) Details
March 15 — Electing larger partnerships
Provide each partner with a copy of Schedule K1 (Form 1065B), Partner's Share of Income (Loss) From an Electing Large Partnership, or a substitute Schedule K1. This due date applies even if the partnership requests an extension of time to file the Form 1065B by filing Form 7004
March 15 — Partnerships
Electing large partnerships: File a 2018 calendar year return (Form 1065-B) Details
March 15 — Social security, Medicare, and withheld income tax
If the monthly deposit rule Page 6 Publication 509 applies, deposit the tax for payments in February.
March 31 — Electronic filing of Forms W2
File copies of all the Forms W2 you issued for 2018. This due date applies only if you electronically file.
March 31 — Electronic filing of Forms W2G
File copies of all the Forms W2G you issued for 2018. This due date applies only if you electronically file.
March 31 — Electronic filing of Forms 8027
File Forms 8027 for 2018. This due date applies only if you electronically file.