Form 8300: Reporting Cash Payments Over $10,000 to the IRS

Form 8300 applies broadly to anyone running a business who takes cash above the threshold. The IRS newsroom guidance is direct: "Generally, any person in a trade or business who receives more than $10,000 in cash in a single transaction or in related transactions must file a Form 8300."^[7] The About Form 8300 page uses the same language in the form title and the filing rule: "Each person engaged in a trade or business who, in the course of that trade or business, receives more than $10,000 in cash in one transaction or in two or more related transactions, must file this form."^[1]

For Miami filers, that catches a long list of operators: auto dealers in Doral, jewelers and watch dealers along Lincoln Road, art galleries in Wynwood, real estate brokerages handling cash deposits, pawn shops in Hialeah, and travel agencies near the airport. The rule is industry-agnostic; the trigger is the cash above the threshold, not the line of business.

The IRS uses a broader definition of cash than everyday usage. Per the newsroom guidance, "cash includes coins and currency of the United States or any foreign country."^[8] That covers a US dollar payment and a euro payment the same way.

The definition also reaches certain cash equivalents below the threshold. The same guidance lists: "cashier's checks (sometimes called a treasurer's check or bank check), bank drafts, traveler's checks or money orders with a face amount of $10,000 or less"^[9] when used in specific contexts, including a designated reporting transaction or a payment where the person knows the payer is trying to avoid the reporting requirement. Personal checks and wire transfers are not cash for Form 8300 purposes.

The threshold does not reset between checks. Two or more payments connected to a single deal aggregate against the $10,000 line. The IRS newsroom page describes the windows: an example of cash that triggers Form 8300 includes "In two or more related payments within 24 hours"^[10] and "As part of a single transaction or two or more related transactions within a 12 month period"^[10]

The practical consequence for a Miami auto dealer or jeweler: consecutive cash payments tied to the same vehicle, the same watch, or the same piece of jewelry can cross the $10,000 line by aggregation even if no individual payment hits the threshold on its own. The 12 month window catches structured payments spread across weeks or months that still tie back to one underlying transaction.

Form 8300 is a fast-deadline form. The IRS instruction is plain: "You must file Form 8300 within 15 days after the date the cash transaction occurred."^[2]

There is a separate notice obligation to the customer. The IRS says you must also "provide a written statement to each party whose name you included on the Form 8300 by January 31 of the year following the reportable transaction."^[3] The statement names your business, the contact person and phone number, and the aggregate amount of reportable cash. Recordkeeping closes the loop: "Remember, you must keep a copy of Form 8300 for five years."^[4]

Paper filing is no longer the default. The IRS guidance describes the mandate: "Effective January 1, 2024, you must electronically file (e-file) Forms 8300 if you're required to e-file other information returns, such as Forms 1099 series and Forms W-2."^[5] The threshold that pulls a business into mandatory e-filing is the 10-return rule: "You must e-file your Forms 8300 if you're required to file at least 10 information returns of one or more type(s) other than Form 8300 during a calendar year."^[6]

Most active Miami businesses meet the 10-return threshold without trying. If you issue more than ten 1099 forms or W-2 forms in a year, you are also locked into electronic Form 8300. business tax return preparation handles this packaging together with the rest of the year-end information return cycle.

Form 8300 lives at the intersection of bookkeeping discipline and audit-ready filings. A business that does not flag cash receipts above the threshold inside its books has no way to file Form 8300 inside the 15-day window. small business accounting builds the cash-flag inside the chart of accounts so that the trigger is automatic, not memory-dependent. When a flagged transaction lands, the Enrolled Agent files the form, sends the January 31 customer statement, and keeps the 5-year retention copy.

For real estate and property management tax services clients in Miami, the rule shows up most often around cash deposits and earnest money in residential closings. The same pattern repeats in jewelry showrooms, auto dealerships, and pawn shops. For non-resident family members in those ownership chains who need a US tax ID, see our ITIN application guide for Miami filers guide.