Financial Glossary
Payer's TIN (on Form 1099)
The Payer's TIN is the taxpayer identification number of the entity that issued a Form 1099, shown in the upper-left section of the form alongside the payer's name and address. For a business this is usually its Employer Identification Number (EIN), while a sole proprietor without an EIN may use a Social Security Number. It tells the IRS and the recipient exactly which payer reported the income.
Problem & Application
STR hosts, campground operators, and other owner-operated businesses that issue 1099s must enter their own TIN as the Payer's TIN and the recipient's TIN separately, and mixing the two is a common filing error. When you receive a 1099-INT or 1099-NEC, the Payer's TIN lets you trace the form back to the correct payer if an amount looks wrong or a form is missing. Reporting income under a mismatched or incorrect TIN can trigger IRS notices and backup withholding obligations.
In Short
Getting the Payer's TIN right is a small field with outsized consequences for matching, reconciliation, and avoiding IRS correspondence.