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Pro Tip

SSDI vs SSI: What’s the Difference?

Published:
6/19/26
Updated:
Author:
Lisa Johnson

Social Security Disability Insurance (SSDI) and Supplemental Security Income (SSI) are both Social Security disability benefit programs offered by the Social Security Administration (SSA) to help people with disabilities. 

SSDI is based on your work history and the Social Security taxes you paid. SSI is for people with limited income and resources who are older or cannot work because of a disability. Both programs have strict disability rules. You can qualify for one or both.

This article explains SSDI vs. SSI, the main differences, eligibility rules, and the benefits. It helps you understand which program to apply for if you can’t work and need help.

SSDI vs. SSI at a Glance

SSDI and SSI are for different situations. This table shows the main differences.

Category SSDI SSI
Program name Social Security Disability Insurance Supplemental Security Income
Eligibility basis Disability and work history Disability and financial need
Work history requirement Required Not required
Financial need requirement Not the main basis Limited income and resources
Disability standard SSA disability rules SSA disability rules
Payment calculation Based on earnings record Based on federal benefit rate and countable income
Health coverage Medicare after a waiting period Medicaid in most states
Family benefits Some family members can qualify on the worker’s record No family benefits on a worker’s record
Can you receive both Yes, in some cases Yes, in some cases

‍

The right program for you depends on your health condition, work history, and finances.

Disability Rules for SSDI and SSI

To meet the SSA’s definition of disability, you must have a medically-proven physical and/or mental impairment that prevents you from working or severely limits how much you can work.

The SSA measures your ability to work with an income limit called substantial gainful activity (SGA). Your health condition must prevent you from earning SGA for at least 12 months or be expected to result in death. In 2026, SGA is $1,690 gross per month or $2,830 if you’re blind.

The SSA reviews medical records and work activity to decide a disability claim. A diagnosis alone is not enough. Your medical records must show how the condition limits your ability to function day-to-day and work a regular schedule.

What is SSDI?

SSDI is a federal disability insurance program based on Social Security taxes. To be eligible for SSDI, you must have enough work credits and meet the SSA’s disability rules (work credits explained below).

If you worked for many years and a medical condition now prevents you from working, you may meet SSDI eligibility rules and qualify for benefits. Monthly SSDI benefits are based on your earnings record. Family members may be eligible for benefits on your record too.

What is SSI?

If you meet the SSA’s disability rules, but you don’t have enough work credits and your income and resources fall under SSI income limits, you may qualify for SSI. SSI doesn’t require a past work record.

This program helps adults and children with disabilities or blindness, as well as people age 65 or older, who have little or no income and limited resources.  

How SSDI and SSI Benefits and Health Coverage Differ 

SSDI Eligibility Is Based on Work History and Credits

SSDI work credits are earned by paying into Social Security through work. Since 1978, you’ve been able to earn up to four credits a year. Credits are based on wages, not time, so you can earn four credits in less than a year.

You earn one credit for every $1,890 in covered earnings in 2026. When your covered earnings reach $7,560, you earn four credits for the year.

How many SSDI work credits you need depends on the age at which you became unable to work because of an impairment (disability onset). If you're 31 or older, you probably need 20 credits from the 10 years of work before the disability onset. Credit requirements are higher for older workers and lower for younger workers.

The SSA also looks at your recent work to prove you were working before your disability. You typically need to have earned max credits in five of the 10 years before you stopped working.

SSI Eligibility Is Based On Financial Need

You must prove that your condition meets the SSA’s disability rules and that you fall under SSI income limits with limited money or resources. Resources include income, money in bank accounts, assets, cash, stocks, and land. A child’s SSI eligibility depends on the household’s income and resources.

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How Benefits and Health Coverage Differ

Because SSDI payments are based on lifetime earnings and SSI payments are based on the federal benefit rate and countable income, payment amounts may be very different. 

Another big difference between SSDI and SSI is that family members may be eligible for SSDI benefits from your record, but SSI doesn’t have family benefits.

Health Insurance Coverage 

There’s also a difference with health insurance. In most states, Medicaid coverage starts as soon as you qualify for SSI, and it may be retroactive. But you must apply for Medicaid separately in Connecticut, Hawaii, Illinois, Minnesota, Missouri, New Hampshire, North Dakota, Oklahoma, and Virginia.

If you’re approved for SSDI, you usually have a 24-month Medicare waiting period from your first entitlement month, with a few exceptions, unless you turn 65 first. Exceptions are cases of Amyotrophic Lateral Sclerosis (ALS) and end-stage renal disease, which get Medicare earlier. (All legal US residents get Medicare at age 65.)

You can be eligible for both Medicaid coverage and Medicare. 

You Can Get Both SSDI and SSI

You can qualify for concurrent SSDI and SSI benefits. This happens when you have enough work history for SSDI but a payment low enough to qualify for SSI. 

Which Program May Fit Your Situation

Your SSDI eligibility and SSI eligibility depend on your work record and financial situation. This table can help you decide if you should apply for one or both (you must meet the SSA’s disability rules for both programs).

Your Situation Program That May Fit Why
You worked for years before your disability SSDI SSDI is based on your work record
You have little income and limited resources SSI SSI is based on financial need
You could qualify for SSDI and have a low payment SSDI and SSI SSI can supplement a low SSDI payment if you qualify
You never worked or lack work credits SSI SSI does not require work credits
You are applying for a child SSI Child SSI is based on disability and household finances

‍

Unsure about your eligibility? Advocate can help.

Our disability specialists and clinical staff can help you:

  • Determine eligibility
  • Build a strong claim
  • Gather medical evidence
  • Complete forms
  • Talk to the SSA
  • Understand SSA notices

What to Do Next

If you want to apply for SSDI, SSI, or both you need to gather medical records that show your diagnoses, treatment, test results, and functional limits. Strong medical evidence is key for disability claims.

It’s helpful to create a timeline of when your health condition started limiting your ability to work to when you stopped working. Then, put your medical care on the timeline as well.

You also need information about your work history, especially from the past five years. This includes your job titles and employers, company addresses, job duties, and mental and physical demands. This article shows you how to explain past jobs and current limitations.

You can see the taxes you’ve paid into Social Security by creating an online account. If you need help or don’t have Internet access, you can call 1-800-772-1213 or 1-800-325-0778 for TTY if you are deaf or hard of hearing. You may also talk to someone at your local SSA office.

For SSI eligibility, the SSA asks for proof of income and resources like bank statements, living arrangements, assets, and more.

Check your SSDI eligibility in a few minutes.
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Frequently Asked Questions About SSDI vs. SSI

Is SSDI better than SSI?

SSDI and SSI are not comparable. They are different programs with different criteria. If you can’t work because of a health condition, either Social Security disability benefits program may help you. 

Which pays more, SSDI or SSI?

SSDI payments are based on a worker’s earnings record so they are typically higher than SSI payments. However, an SSDI payment can be low enough to also qualify for SSI.

Can I get SSI if I never worked?

Yes, SSI does not require work credits. The SSA determines eligibility with its disability rules and a review of your financial situation.

Can I get SSDI if I have savings?

Yes, SSDI doesn’t have income or asset limits like SSI does.

Can I get both SSDI and SSI?

Yes, you can qualify for concurrent SSDI and SSI benefits if you have enough work credits for SSDI but an SSDI payment small enough to be under SSI income limits.

What if my claim was denied?

About 70% of initial disability claims are denied but many are approved later on appeal. This article explains how to file for reconsideration, your first level of appeal.

If your initial claim was denied, don’t fret. 

Advocate’s disability specialists can help you appeal or prepare for an ALJ hearing. We can even represent you in court.

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