Taxpayer identification number (TIN): What it is and how to find it
A TIN is a nine-digit number used to identify taxpayers. If you need to file taxes, you’ll need a TIN.
2 min read
Jun 05, 2025
Cynthia Widmayer is an insurance contributor for Bankrate and has over two years of experience as a personal finance writer. She covers home, car and life insurance products for Bankrate, the Simple Dollar and Coverage.com among others.
A TIN is a nine-digit number used to identify taxpayers. If you need to file taxes, you’ll need a TIN.
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