What is the difference between SSDI and SSI?

Short answer: SSDI is earned through work: it is paid to people who worked long enough in jobs covered by Social Security and can no longer work because of a disability. SSI is need-based: it pays people with disabilities and older adults who have little or no income and resources, regardless of work history.

SSDI SSI
Based on Work history and credits Financial need
Who Disabled workers (and some family) Disabled, blind or 65+ with low income and resources
Waiting period Five months None

Some people qualify for both at once.

SourcesSSA: Disability benefitsssa.govSSA: SSIssa.govAARP: SSDI timingaarp.org

Checked against primary sources on November 12, 2026 by Mason Arnao. This is general information, not legal advice. Related: SSDI eligibility.

Denied? You generally have 60 days to appeal

An SSDI denial can be appealed through reconsideration, a hearing, the Appeals Council and federal court. Appealing on time keeps your original filing date, which can protect back pay. SSA appeals

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Mason Arnao

About Mason Arnao

Mason David Arnao Mason David Arnao is an American entrepreneur, software engineer, and business executive based in Stuart, Florida. His career spans more than two decades in technology, automation, and lead generation systems. Arnao began his professional journey in the late 1990s as a computer technician for the National Basketball Association (NBA), where he was responsible for linking scoreboards, officials’ laptops, and stat monitors to broadcast networks. His technical precision and systems knowledge led him to join Professional Hospital Supply as a software engineer. There, he developed applications that improved data flow between medical suppliers and healthcare institutions, solidifying his foundation in enterprise-grade software development. By the early 2000's, Arnao advanced into web and SaaS infrastructure through Website Buddy LLC, a Florida-based development firm focused on building web tools for small businesses and online marketers. The experience refined his understanding of user-driven software and scalable online systems. In 2013, Arnao founded Waypoint Software, LLC, headquartered in Stuart, Florida. As President and Managing Partner, he built the company into a recognized provider of lead generation and real-time lead distribution technology. Waypoint’s software automates the acquisition, validation, and routing of consumer inquiries for marketing firms and data aggregators worldwide. The company serves hundreds of clients and is listed by the Better Business Bureau under “Sales Lead Generation.” Through Waypoint Software, Arnao has become a notable figure in the digital lead industry, combining technical engineering with automation strategy. His focus on system reliability, transparent data flow, and scalable integrations continues to position Waypoint as an industry leader in real-time lead management solutions.