The Social Security Administration runs two separate disability programs

The Social Security Administration (SSA) is a federal agency that manages two distinct disability benefit programs: Social Security Disability Insurance (SSDI) and Supplemental Security Income (SSI). They are funded differently, have different rules, and serve different populations—but both are administered by the same agency through the same local offices.

SSDI is an insurance program. You pay into it through payroll taxes while you work, and if you become unable to work before retirement age, you can draw on those credits. SSI is a needs-based program for people with low income and resources, regardless of work history. Understanding which program you might be dealing with matters because the rules for medical evidence, work incentives, and what you can earn while receiving benefits are not the same.

Both programs require you to prove you have a medical condition that prevents substantial work activity and will last at least 12 months or result in death. The SSA makes that information through a five-step sequential evaluation process that is the same for both programs, though the financial thresholds and may be able to access rules differ.

Key Takeaways

  • The SSA administers SSDI (insurance-based, tied to work history) and SSI (needs-based, no work history required), and they have different income limits, asset limits, and benefit amounts.
  • Both programs use the same medical standard: your condition must prevent substantial gainful activity for at least 12 months or result in death.
  • The SSA makes disability determinations through state Disability information Services (DDS) offices, not directly through Social Security field offices.
  • If you are denied, you have the right to appeal, and most people who appeal with a lawyer or representative win at the hearing stage.
  • The SSA offers work incentives—including trial work periods and continued Medicare or Medicaid—that let you test returning to work without when ready losing benefits.

How the SSA decides whether you are disabled

The SSA does not make disability decisions at your local Social Security office. Instead, your case goes to your state's Disability information Services (DDS), a state agency that contracts with the SSA to review medical evidence and make the initial decision. This separation exists because the SSA wanted medical decisions made by people trained in disability evaluation, not benefits administrators.

The DDS uses a five-step process. First, they check whether you are working and earning more than the substantial gainful activity (SGA) limit—currently $1,550 per month for non-blind individuals and $2,590 for blind individuals, though these amounts change yearly. If you are earning above that, you are usually denied. Second, they determine whether your condition is severe enough to affect your ability to work. Third, they check whether your condition meets or equals one of the SSA's listed impairments in the Blue Book. Fourth, if it does not match a listing, they assess your residual functional capacity—what you can still do—and whether that matches any job in the economy. Fifth, they consider your age, education, and work history.

The DDS requests medical records from your doctors, hospitals, and mental health providers. You do not have to pay for these records—the SSA does. But you have to give the DDS permission to request them, and you have to list where you have received treatment. If you have not seen a doctor in months or years, the DDS may deny your claim because there is no current medical evidence to review.

SSDI versus SSI: the main differences

SSDI requires that you have worked long enough and recently enough to have earned sufficient Social Security credits. The number of credits you need depends on your age when you become disabled. If you are under 24, you need only six credits earned in the three years before you became disabled. If you are 24 to 31, you need credits for half the time between age 21 and the time you became disabled. If you are 31 or older, you generally need 40 credits, with at least 20 earned in the 10 years before you became disabled. One credit is earned for each $1,730 of wages in 2024 (the amount changes yearly), and you can earn a maximum of four credits per year.

SSI has no work history requirement. Instead, you must have limited income and resources. Your countable income cannot exceed the federal benefit rate—$943 per month in 2024 for an individual—and your countable resources cannot exceed $2,000. Income and resource limits vary by state because some states add their own money to the federal SSI payment. SSI is also available to children under 18 whose parents have limited income and resources, and to blind and disabled adults over 65.

SSDI benefit amounts are based on your lifetime earnings record. SSI benefit amounts are set by federal law and do not vary based on work history. Both programs connect you to Medicare or Medicaid, but the timing and rules differ. SSDI recipients get Medicare after 24 months of receiving benefits. SSI recipients typically get Medicaid when ready.

What happens after the SSA makes a decision

If the DDS approves your claim, the SSA sends you a notice with your benefit amount and your start date. Benefits are usually paid monthly by direct deposit. If you were denied, you receive a notice explaining the reason and your right to appeal.

You have 60 days from the date on the denial notice to file a Request for Reconsideration. This is a second look at your case by a different DDS examiner. Most reconsiderations are also denied, but if you have new medical evidence, it is worth filing. After reconsideration, you can request a hearing before an Administrative Law Judge (ALJ). This is where most people who appeal with a lawyer or representative win. The ALJ holds a hearing—usually by video now—where you and your representative can present evidence and testify. The ALJ then issues a written decision.

If the ALJ denies you, you can appeal to the Appeals Council, and then to federal court. At each stage, you have the right to be represented by a lawyer or other may have access to representative. Many disability lawyers work on contingency, meaning they take a percentage of your back pay (usually 25 percent, capped at $7,200) only if you win.

Work incentives that let you test returning to work

The SSA offers several work incentives designed so you do not lose all your benefits the moment you earn money. The most important is the Trial Work Period (TWP), available only to SSDI recipients. During a nine-month trial work period, you can earn any amount and still receive your full SSDI benefit. The SSA counts only months in which you earn $1,050 or more (in 2024) toward the nine-month limit. After the TWP ends, you enter the Extended may be able to access Period, during which you can work and still receive a benefit in any month you earn less than the SGA limit.

SSI recipients do not have a trial work period, but they have an Impairment Related Work Expense (IRWE) deduction. If you have costs directly related to your disability—such as medication, therapy, or a personal assistant—those costs are deducted from your income before SSI calculates your benefit. There is also a Plan to Achieve Self-Support (PASS), which lets you set aside income and resources for a specific work goal without those amounts counting against your SSI limits.

Both SSDI and SSI recipients can continue Medicare or Medicaid for a set period after earnings would otherwise end benefits. SSDI recipients keep Medicare for at least 93 months after the TWP ends. SSI recipients can use Medicaid continuation rules that vary by state. These work incentives exist because the SSA recognizes that returning to work is a process, not an on-off switch.

How a disability lawyer helps in the SSA process

A disability lawyer does not change the medical standard the SSA uses or speed up the initial DDS decision. What they do is gather and organize medical evidence, identify which of the SSA's listings your condition might match, develop a residual functional capacity argument, and represent you at the hearing stage where decisions are most often reversed.

At the initial and reconsideration stages, many people represent themselves successfully. But by the time you reach the ALJ hearing, having a lawyer matters. The ALJ hears hundreds of cases and knows the medical evidence needed to win. A lawyer knows which doctors' opinions carry weight with that particular judge, how to cross-examine the SSA's vocational informed, and how to frame your testimony. If you were denied at reconsideration, consulting a disability lawyer before the hearing is a practical next step.

You do not need a lawyer to file your initial claim or reconsideration request. You can also represent yourself at the hearing. But if you do hire a lawyer, the fee is capped and taken only from back pay you win—you do not pay out of pocket if you lose.

The SSA's role in Medicare and Medicaid after disability approval

Once you are approved for SSDI, the SSA automatically enrolls you in Medicare Part A (hospital insurance) and Part B (medical insurance) after 24 months of receiving benefits. You pay premiums for Part B, which are deducted from your SSDI check. You can decline Part B, but most people keep it because the premium is low and the coverage is broad.

SSI recipients are typically enrolled in Medicaid by the state, not by the SSA, though the SSA provides the state with your SSI status. Medicaid rules and coverage vary widely by state. Some states cover more services than others, and some have different income or resource limits for SSI recipients.

The SSA also manages the interaction between disability benefits and other benefits you might receive—such as workers' compensation, veterans benefits, or family benefits based on a parent's or spouse's work record. These can offset your SSDI benefit or affect your SSI may be able to access, so it is important to report them to the SSA.

Frequently Asked Questions

Can I work part-time while receiving SSDI?

Yes, during your nine-month Trial Work Period you can earn any amount and keep your full benefit. After that, you can work and earn up to the SGA limit ($1,550 per month in 2024) and still receive a benefit in months you stay under that threshold. Above the SGA limit, your benefits stop, but you keep Medicare for at least 93 more months.

How long does it take to get a decision from the SSA?

Initial decisions from the DDS typically take three to six months. Reconsideration takes another three to six months. Hearing requests can wait 12 to 24 months depending on your local ALJ office's backlog. If you are denied at hearing, the Appeals Council takes several more months to decide.

What if I disagree with the SSA's decision about my medical condition?

You have the right to appeal. At the reconsideration stage, you can submit new medical evidence. At the hearing stage, you can present your own doctors' opinions and cross-examine the SSA's medical informed. Many people win on appeal, especially with representation.

Does the SSA consider mental health conditions as disabilities?

Yes. The SSA has listings for depression, anxiety, bipolar disorder, schizophrenia, and other mental health conditions. You must provide current medical evidence from a mental health provider—therapist, psychiatrist, or psychologist—showing your symptoms and how they limit your ability to work.

What happens to my benefits if I go back to work and earn too much?

If you are in your Trial Work Period, nothing—you keep your full benefit. If you are past the TWP and earn above the SGA limit, your SSDI stops that month, but you keep Medicare. If you are on SSI and earn above the limit, your SSI payment reduces or stops, but you may keep Medicaid depending on your state's rules.