In the United States, a Social Security Number (SSN) is one of the most vital identifiers for individuals. It plays a significant role in a person’s financial life, influencing everything from tax reporting to eligibility for loans and credit cards. But, perhaps most importantly, your SSN is essential for building your credit score—a key factor in determining your financial health. In this article, we’ll explore how to obtain a U.S. Social Security Number, why it’s crucial for building credit, and how services like RentRX, a rent payment and rent reporting service, can help you build your credit score by ensuring your rent payments are reported to credit bureaus—provided you have an SSN.
What is a Social Security Number (SSN)?
A Social Security Number (SSN) is a nine-digit identification number issued by the Social Security Administration (SSA). Initially, it was created in 1936 to track individuals’ earnings and determine their eligibility for Social Security benefits in retirement. However, over the years, the SSN has become much more than just a way to track retirement benefits. It is now used by various organizations—including employers, financial institutions, and credit bureaus—to track a person’s financial activities.
The SSN is tied to an individual’s credit history, allowing lenders and other financial entities to track their creditworthiness. In addition to this, the SSN is used in tax filings, applying for government benefits, opening bank accounts, and signing leases or contracts.

