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SSD vs SSI: What’s the Difference?

Two different programs. Same goal — helping disabled Americans. Here’s how they differ and which one you may qualify for.

At a Glance

Key Differences Between SSD and SSI

Feature	SSDI (Social Security Disability Insurance)	SSI (Supplemental Security Income)
Based On	Your work history and payroll tax contributions	Financial need / limited income and resources
Funding	Social Security trust funds	General tax revenues
Who Qualifies	Workers who earned enough work credits	Disabled individuals with low income, regardless of work history
Benefit Amount	Based on average lifetime earnings	Fixed federal rate (with possible state supplements)
Health Insurance	Medicare after 24 months	Medicaid in most states
Age Requirement	Under full retirement age	Any age (including children with disabilities)

A Deeper Look

Understanding Each Program

SSDI is an insurance program. You earn eligibility by working and paying Social Security taxes, accumulating “work credits.” Your monthly benefit is based on your earnings history, and after 24 months of disability you become eligible for Medicare.

SSI is a needs-based program. It provides a modest monthly payment to disabled adults and children who have limited income and resources, regardless of their work history. It typically comes with Medicaid coverage.

Many claimants qualify for both programs at the same time — known as “concurrent” benefits. An experienced advocate can help you maximize every benefit you are entitled to.

Both Programs

Same Disability Standard Applies

Whether you apply for SSD, SSI, or both, the SSA applies the same strict medical definition of disability.

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Same Medical Test

You must be unable to do substantial gainful work due to a medically determinable impairment lasting 12+ months.

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Same Application

The SSA accepts one application for both programs and determines which one(s) you qualify for automatically.

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Same Appeals Process

Both programs share the same 4-level appeal process: reconsideration, hearing, appeals council, and federal court.