Disability Benefits Explained: SSDI vs SSI

Two federal programs can keep the lights on while you focus on your health.

SSDI and SSI sound similar, but they serve different people and use different rules. Here’s a clear, encouraging breakdown so you can figure out which path fits—and what to do next. For readers in Phoenix, Arizona, Medicaid tie-ins, state supplements, and local office procedures aren’t identical—look for Arizona callouts before you apply.

Start here: what to do first

• Map your likely lane. If you’ve worked and paid Social Security taxes, you may fit SSDI; if your income/resources are very limited, you may fit SSI—some people apply for both.
• Write a timeline of your condition. When symptoms started, treatments tried, flare-ups, and how work tasks became hard or impossible.
• List your providers and records. Doctors, clinics, hospitals, therapists, meds, imaging, and any work restrictions a clinician has documented.
• Document work impact. Tasks you can’t do reliably, safely, or consistently; missed days; performance write-ups—specifics matter.
• Prepare for the wait. Initial decisions often take months; plan for interim help (food, housing, health coverage) while your case moves.

Why similar diagnoses get different decisions: SSDI work credits vs. SSI financial need

• Different gates. SSDI checks your insured status (enough recent work credits) and whether your condition prevents substantial work. SSI checks income and resource limits plus disability.
• The recency rule. For SSDI, credits must be recent—gaps in work can reduce eligibility even if your condition is severe.
• Household math. SSI looks at countable income and resources; some support you receive may reduce the payment amount.
• Mixed outcomes happen. You can be denied SSDI for insufficient credits yet qualify for SSI based on need—or qualify for both with different monthly amounts.
• What to gather. Proof of past employment and W-2s for SSDI; bank balances, rent, and support details for SSI.

Inside the decision: the five steps SSA uses (and how to prepare)

• Step 1: Are you working above the limit? Earnings over a monthly threshold can count as substantial work; if not, review continues.
• Step 2: Is your condition “severe”? It must significantly limit basic work activities for at least 12 months (or be terminal).
• Step 3: Does it meet or equal a listed impairment? If your medical evidence matches specific criteria, you may be approved here.
• Step 4: Can you do your past work? SSA looks at your residual functional capacity and compares it to your recent jobs.
• Step 5: Can you adjust to other work? Age, education, and skills matter. Be thorough about limitations like pace, attendance, and need for accommodations.
• Your prep list. Keep treatment notes organized, ask providers for functional statements, and describe typical “bad days” with concrete examples.

FAQs for Phoenix, Arizona

References