Can you receive money without reporting it to the IRS? 

The IRS says most income is taxable unless it is specifically exempted by law, and it also says that even if you don’t receive a form reporting income, you should report it on your tax return. That means you cannot legally skip reporting money just because no 1099 or W-2 was issued. If the money is taxable income, it generally still has to be reported.

But not every transfer of money is taxable income. The IRS says money received as a gift, reimbursement, or repayment of personal expenses is generally not taxable, and IRS guidance on Form 1099-K says personal payments from family and friends, such as gifts or reimbursements, should not be reported as taxable business income. The IRS also says that the recipient of a gift generally does not have to report the gift as income, even though the giver may have separate gift-tax reporting obligations in some situations.

Loans are another major example. The IRS says that when you borrow money, the loan proceeds are generally not income because you have an obligation to repay them. But if the lender later forgives or cancels the debt, the canceled amount can become taxable in many cases.

So the clean rule is this: you can receive money without reporting it only when the money is not taxable in the first place. If it is compensation, business income, gain, or other taxable income, the IRS expects it to be reported even without an information form.