Social Security Disability: SSDI, SSI, and the Five-Step Sequential Evaluation

Summary. Social Security disability is a two-program system with one definition of disability, a five-step decision process, and an appeals structure that most claimants abandon before reaching the stage where they were most likely to win. This article explains both programs and the eligibility rules that separate them, walks the sequential evaluation with the evidence that matters at each step, covers residual functional capacity and the vocational grid rules that decide most cases, and takes the appeal from reconsideration through the ALJ hearing, the Appeals Council, and federal district court. It also covers work incentives, overpayments, representative fees, and the interaction with workers' compensation.

Here is a statistic that should change how anyone approaches this system.

At the initial application level, roughly two out of three claims are denied. At reconsideration — the first appeal — the denial rate is higher still; that stage overturns very few decisions. At the hearing before an administrative law judge, however, a substantial share of claims are approved, and represented claimants fare markedly better than unrepresented ones.

And yet a large fraction of denied claimants never appeal at all. They receive a denial letter, conclude the government has decided, and start over with a new application months later — which resets the clock, forfeits back benefits, and lands them in the same place.

The single most valuable thing anyone can know about Social Security disability is that the denial letter is the beginning of the process, not the end of it, and that the deadline to appeal is sixty days.

Part I: Two programs, one definition

Social Security Disability Insurance (SSDI), under Title II, is an insurance program. Workers pay FICA taxes, earn quarters of coverage, and become insured. Benefits are based on lifetime earnings. There is no asset test and no income test other than the work test described below. After twenty-four months of entitlement, a beneficiary receives Medicare. Dependent children and spouses may receive auxiliary benefits. See 42 U.S.C. § 423.

Supplemental Security Income (SSI), under Title XVI, is a welfare program. It requires no work history, but imposes strict income and resource limits — with a resource ceiling that has not been adjusted in decades and that catches many applicants by surprise. SSI recipients generally receive Medicaid, usually immediately. See 42 U.S.C. § 1382c and 42 U.S.C. § 1383.

Many claimants file concurrent claims for both.

The definition of disability

For adults, both programs use the same statutory definition: the inability to engage in any substantial gainful activity by reason of any medically determinable physical or mental impairment which can be expected to result in death or which has lasted or can be expected to last for a continuous period of not less than twelve months.

Read carefully, that definition contains four separate requirements, and claims fail on each of them:

Medically determinable impairment — established by objective medical evidence from an acceptable medical source. Symptoms alone, however genuine, are not enough.
Duration — twelve months or expected to last twelve months, or terminal. A serious injury with a nine-month recovery does not qualify, no matter how disabling it was.
Inability to engage in substantial gainful activity — not inability to do the claimant's own job, which is a common and costly misunderstanding.
"Any" SGA — the inquiry considers work existing in the national economy, whether or not it exists where the claimant lives, whether or not a specific vacancy exists, and whether or not the claimant would be hired.

That last point is the hardest for claimants to accept and the most important to understand. The question is not whether anyone would hire you. It is whether jobs you could physically and mentally perform exist in significant numbers.

Insured status and the date last insured

For SSDI, a claimant must be insured — generally requiring twenty quarters of coverage in the forty-quarter period ending with disability onset, with reduced requirements for younger workers.

The date last insured (DLI) is a hard deadline that ends more claims than any medical issue. A claimant who stopped working in 2016 and applies in 2026 may have a DLI in 2021, meaning she must prove she was disabled on or before that date. Medical evidence from 2024 showing severe impairment is largely beside the point; the evidence must establish the condition as of the DLI. Retrospective medical opinions and old records become the entire case.

Children are evaluated under a different standard — marked and severe functional limitations — and the Supreme Court's decision in Sullivan v. Zebley, 493 U.S. 521 (1990), invalidating the prior listings-only approach for children, prompted the functional equivalence framework now used.

Part II: The five-step sequential evaluation

The regulations at 20 C.F.R. Part 404 (SSDI) and Part 416 (SSI) prescribe a five-step process. It is sequential: a finding at certain steps ends the inquiry. The Supreme Court described and approved the framework in Bowen v. Yuckert, 482 U.S. 137 (1987).

Step 1 — Is the claimant engaged in substantial gainful activity?

SGA is defined largely by a monthly earnings threshold that adjusts annually and is higher for statutorily blind claimants. Earnings above it generally end the claim regardless of medical condition.

Important refinements:

Impairment-related work expenses — the cost of items and services needed to work because of the impairment — are deducted from earnings before the SGA comparison.
Subsidies and special conditions — where an employer pays more than the work is worth, or provides extraordinary accommodation — reduce the countable earnings.
Unsuccessful work attempts — work lasting six months or less that ended or was reduced below SGA because of the impairment — do not count.
Self-employment is evaluated under separate tests looking at significant services and the value of the work, not merely net profit.

Step 2 — Does the claimant have a severe medically determinable impairment?

A severe impairment significantly limits the ability to perform basic work activities. The threshold is low — described as a de minimis screening device — and denials at Step 2 are frequently reversible.

Two requirements are frequently missed:

The impairment must be medically determinable, established by objective findings from an acceptable medical source. Symptoms not tied to a diagnosable condition do not count.
The agency must consider the combined effect of all impairments, severe and non-severe. A claimant with moderate arthritis, moderate depression, obesity, and mild sleep apnea may not have a single severe impairment but may be disabled in combination — and failure to consider the combination is one of the most common grounds for reversal.

Step 3 — Does the impairment meet or medically equal a Listing?

The Listing of Impairments describes conditions considered severe enough to prevent SGA regardless of vocational factors. Meeting a listing results in a finding of disability without further inquiry.

Meeting a listing is hard. The criteria are specific, conjunctive, and demanding — a particular test result, a particular finding on examination, a documented frequency of episodes over a stated period. Most claimants who are ultimately found disabled do not meet a listing.

Medical equivalence — findings at least equal in severity to the listed criteria — is available, and functional equivalence applies in children's cases.

Practical advice: read the applicable listing before the hearing and determine precisely which criteria are met and which are not. The most common error in unrepresented cases is asserting that a diagnosis "meets the listing" when the listing requires specific findings the record does not contain — and the second most common is failing to notice that one missing test would have satisfied it.

Step 4 — Can the claimant perform past relevant work?

First the agency assesses residual functional capacity (RFC) — the most a claimant can still do despite limitations — then compares it to past relevant work, defined as SGA-level work performed within the relevant recency period long enough to learn it.

RFC is the heart of the case. It is expressed in exertional terms (sedentary, light, medium, heavy, very heavy) plus non-exertional limitations: postural (stooping, crouching, climbing), manipulative (handling, fingering, reaching), environmental (heat, cold, fumes, hazards), and mental (understanding, concentration and persistence, social interaction, adaptation).

Two features of the comparison surprise claimants:

Past work is evaluated as actually performed and as generally performed in the national economy. A claimant whose particular job required heavy lifting may still be found able to do that occupation as generally performed at a lighter level.
Barnhart v. Thomas, 540 U.S. 20 (2003), held that a claimant may be denied at Step 4 if able to perform past relevant work even if that work no longer exists in significant numbers in the national economy. The reasoning is textual and the result is harsh: an elevator operator able to operate elevators is not disabled.

Step 5 — Can the claimant perform other work?

The burden shifts to the agency at Step 5 to show that jobs exist in significant numbers in the national economy that the claimant can perform given RFC, age, education, and work experience.

Two mechanisms do the work:

The Medical-Vocational Guidelines — the "grids" — are tables that direct a conclusion of disabled or not disabled based on RFC exertional level, age category, education, and skill transferability. Age drives the grids more than anything else. The categories — younger individual (under 50), closely approaching advanced age (50–54), advanced age (55+), and closely approaching retirement age (60+) — produce dramatically different outcomes on identical medical facts. A claimant limited to sedentary work with no transferable skills is frequently directed "disabled" at 50 and "not disabled" at 49. Borderline age situations, where a claimant is within a few months of a higher category, require the agency to consider using the higher category, and are a recurring appellate issue.

Vocational expert testimony is used where non-exertional limitations prevent direct application of the grids. The ALJ poses hypothetical questions describing a person with the claimant's RFC and vocational profile, and the VE identifies occupations and job numbers.

The VE cross-examination is where hearings are won. The productive lines:

Add the limitations the ALJ's hypothetical omitted — off-task percentage, absences per month, need to elevate legs, need for unscheduled breaks — and ask whether work remains. Testimony that being off-task more than roughly ten to fifteen percent of the workday, or absent more than one to two days per month, precludes competitive employment is common and case-dispositive.
Challenge the job numbers: their source, the methodology used to derive occupation-specific figures from broader census groupings, and whether the numbers are full-time.
Identify conflicts with the Dictionary of Occupational Titles, which the ALJ must ask about and resolve on the record.
Probe the obsolescence of identified occupations. Document preparer, addresser, and similar DOT occupations remain in use in hearings despite their evident scarcity in the modern economy.

On the evidentiary standard for VE testimony, Biestek v. Berryhill, 587 U.S. 97 (2019), held that a VE's refusal to produce the underlying private market-survey data does not categorically render the testimony insufficient to constitute substantial evidence. The Court emphasized a case-by-case approach — which means the cross-examination that develops the weakness of the data still matters enormously.

Part III: Evidence, and how the agency weighs it

The end of the treating physician rule

For claims filed on or after March 27, 2017, the agency no longer gives controlling weight to a treating source's opinion. Instead it evaluates the persuasiveness of each medical opinion using five factors, of which two are most important and must be explained: supportability — the objective evidence and explanations the source provided for the opinion — and consistency — how the opinion aligns with the rest of the record.

What this means in practice. A conclusory checkbox form from a long-time treating physician is now less useful than a well-explained opinion tied to specific findings. The winning medical opinion:

States function-by-function limitations in vocationally relevant terms — how many pounds, how long standing, how long sitting, how often off-task, how many absences per month — rather than "totally disabled," which is an issue reserved to the Commissioner and is given no weight at all.
Explains the objective basis for each limitation, citing imaging, examination findings, and test results.
Addresses the relevant period, including the date last insured where that matters.
Is consistent with the treatment notes, which is why counsel should read the notes before requesting the opinion.

Symptom evaluation

Subjective symptoms are evaluated in two steps: whether there is a medically determinable impairment that could reasonably be expected to produce the symptoms, and then the intensity and persistence of those symptoms in light of the whole record — objective findings, treatment received and its effectiveness, daily activities, medication side effects, and precipitating factors.

Two persistent problems. First, daily activities are routinely overread: the ability to prepare simple meals, drive short distances, and shop occasionally does not establish the ability to sustain full-time competitive work, and decisions that equate them are frequently reversed. Second, gaps in treatment are held against claimants who could not afford care — and the agency's own rules require consideration of the reasons for non-compliance, including inability to pay, side effects, and mental impairment affecting insight.

Consultative examinations

Where the record is insufficient, the agency purchases a consultative examination. These are brief, the examiner has usually not seen the claimant before, and the reports are often thin. Their weaknesses — a fifteen-minute examination, no review of records, no testing — are legitimate cross-examination and briefing material.

Duty to develop the record

An ALJ has an affirmative duty to develop a full and fair record, heightened where the claimant is unrepresented. Failure to obtain obviously missing records, to order a consultative examination when one is needed, or to question a claimant meaningfully is a recurring ground for remand. On exhaustion, Sims v. Apfel, 530 U.S. 103 (2000), held that a claimant who obtains Appeals Council review does not waive issues not raised in the request for review — a consequence of the inquisitorial, non-adversarial character of the proceeding.

Part IV: The appeal path

Four levels, each with a sixty-day deadline (plus five days presumed for mailing).

1. Initial determination, made by a state Disability Determination Services agency under 42 U.S.C. § 421.

2. Reconsideration, a paper review by a different DDS examiner. Approval rates are low. Do it anyway — it is a required step in most states.

3. Hearing before an administrative law judge. This is the stage that matters. It is non-adversarial: there is no government lawyer opposing the claim. The claimant testifies, a vocational expert usually testifies, sometimes a medical expert testifies, and the ALJ decides. Waits have historically ranged from several months to well over a year.

4. Appeals Council review, which may deny review, remand, or decide the case. It grants review in a minority of cases, most often for a legal error or an unsupported finding.

5. Federal district court under 42 U.S.C. § 405(g), which provides for review of a final decision. The standard is whether the decision is supported by substantial evidence and free of legal error — "more than a mere scintilla," meaning "such relevant evidence as a reasonable mind might accept as adequate to support a conclusion," a formulation dating to Richardson v. Perales, 402 U.S. 389 (1971), and reaffirmed as a deferential threshold in Biestek. The usual remedy is remand for further proceedings; an outright award of benefits requires a record where further development would serve no purpose.

Two procedural decisions worth knowing. Smith v. Berryhill, 587 U.S. 471 (2019), held that an Appeals Council dismissal of an untimely request for review is a "final decision" subject to judicial review — closing a gap that had left such claimants with no forum. Carr v. Saul, 593 U.S. 83 (2021), held that claimants need not have raised an Appointments Clause challenge to the ALJ before the agency to preserve it in court, again reflecting the non-adversarial character of the process.

And the constitutional floor: Mathews v. Eldridge, 424 U.S. 319 (1976), held that due process does not require an evidentiary hearing before termination of disability benefits, and supplied the three-factor balancing test — private interest, risk of erroneous deprivation and the value of additional safeguards, and the government's interest — that governs administrative due process generally. See Challenging Agency Action Under the Administrative Procedure Act.

Part V: What happens after an award

Onset date and back benefits. The established onset date determines back pay. SSDI has a five-month waiting period from onset, and retroactive benefits reach back at most twelve months before the application date. SSI has no waiting period but pays only from the application date forward. The difference between an onset date of January and one of June can be many thousands of dollars, which is why the onset date deserves as much attention as the disability finding itself.

Medicare and Medicaid. SSDI beneficiaries become Medicare-eligible twenty-four months after entitlement begins (immediately for ALS, and on a different schedule for end-stage renal disease). SSI recipients generally receive Medicaid immediately in most states.

Continuing disability reviews. Cases are periodically reviewed. Termination generally requires medical improvement related to the ability to work, and beneficiaries may elect to continue receiving benefits during an appeal — at the risk of an overpayment if they lose.

Work incentives, which are real and underused:

A trial work period of nine months (not necessarily consecutive) during which SSDI benefits continue regardless of earnings.
An extended period of eligibility of thirty-six months afterward, during which benefits are paid for any month earnings fall below SGA.
Expedited reinstatement within five years without a new application.
For SSI, exclusion of a portion of earned income, PASS plans, and Student Earned Income Exclusion for younger recipients.
Continued Medicare and Medicaid coverage under specified provisions.

Overpayments are common and are pursued aggressively. Two forms of relief exist: reconsideration, disputing that an overpayment occurred or its amount, and waiver, which requires that the claimant was without fault and that recovery would defeat the purpose of the Act or be against equity and good conscience. Both have deadlines. A waiver request generally suspends recovery while it is pending — which is precisely why it should be filed immediately rather than after collection begins.

Representative fees are regulated by 42 U.S.C. § 406. At the administrative level, a fee agreement is typically capped at twenty-five percent of past-due benefits or a statutory maximum, whichever is less, and must be approved. For court-stage representation, Gisbrecht v. Barnhart, 535 U.S. 789 (2002), held that § 406(b) contingent-fee agreements up to twenty-five percent are permissible subject to a court's independent reasonableness review — rejecting the lodestar approach some circuits had imposed. Fees under the Equal Access to Justice Act, 28 U.S.C. § 2412, are separately available where the government's position was not substantially justified, and must be offset against the § 406(b) fee.

Part VI: How other benefits interact

Workers' compensation. Combined workers' compensation and SSDI benefits are capped at eighty percent of average current earnings. Settlement language amortizing a lump sum over the claimant's life expectancy can substantially reduce the offset, and it must be in the settlement document at the time of approval, not added later. See Filing and Litigating a Workers Compensation Claim.

Unemployment benefits. Not an automatic bar, but a certification of availability for full-time work is used against a disability claim. Explain the inconsistency in the record rather than hoping it goes unnoticed.

Private long-term disability. Most LTD policies offset SSDI and require the claimant to apply, sometimes funding representation. The definitions differ materially: LTD policies often define disability as inability to perform the claimant's own occupation for an initial period, a far easier standard than Social Security's.

Veterans benefits. A VA disability rating, including 100% or individual unemployability, is evidence but is not binding on SSA, because the programs use different standards.

Means-tested benefits and personal injury recoveries. A lump sum can terminate SSI and Medicaid eligibility. A special needs trust under 42 U.S.C. § 1396p(d)(4) preserves both. See Special Needs Trusts and Medicaid Planning.

Garnishment protection. 42 U.S.C. § 407 protects Social Security benefits from most creditors — with exceptions for federal taxes, child support, alimony, and certain federal debts — and federal rules require banks to protect two months of directly deposited benefits automatically. Keep benefits in a separate account. See Debt Collection and the FDCPA.

Part VII: A worked example

Facts. Denise, 51, worked eighteen years as a certified nursing assistant — medium to heavy exertion, semi-skilled. She has lumbar degenerative disc disease with an L5-S1 herniation, a failed fusion, chronic pain, and a major depressive disorder that developed afterward. She stopped working in March 2023 and applied in August 2023. Her date last insured is December 2028, so insured status is not an issue.

Initial denial. DDS finds she can perform light work and can do "other work." Denied December 2023.

Reconsideration. Denied April 2024. She appeals within sixty days and requests a hearing.

Development before the hearing. Counsel obtains the complete surgical and pain management records, the post-operative imaging, and the psychiatric records. Counsel then asks the treating pain specialist for a function-by-function medical source statement — not a conclusion of disability — asking specifically: how long can she sit at one time and in an eight-hour day; how long can she stand and walk; how much can she lift occasionally and frequently; how often will she need unscheduled breaks; how many days per month will she be absent; and what percentage of a workday will she be off-task. The physician answers: sitting thirty minutes at a time and about four hours total; standing and walking two hours total; lifting ten pounds occasionally; unscheduled breaks two to three times daily; absences three days per month; off-task twenty percent — each tied to specific imaging and examination findings.

At the hearing. The ALJ's hypothetical describes light work with postural limitations and simple, routine tasks. The VE identifies three occupations. On cross-examination, counsel asks: "If the individual would be off-task twenty percent of the workday, would competitive employment be available?" — No. "If the individual would be absent three days per month?" — No. "If the individual were limited to sedentary work?" — the VE identifies sedentary occupations; counsel then notes that under the grids, a claimant of Denise's age, education, and non-transferable semi-skilled work history limited to sedentary work is directed disabled.

The decision. The ALJ finds an RFC for sedentary work with additional limitations, finds no transferable skills, and applies the grid rule directing a finding of disabled. Onset established March 2023.

Back benefits. Onset March 2023, plus the five-month waiting period, means entitlement begins August 2023. The decision issues in February 2025 — approximately eighteen months of past-due benefits.

What did the work. Three things: appealing rather than reapplying; obtaining a function-by-function opinion instead of a "totally disabled" letter; and knowing that at 51 with no transferable skills, a limitation to sedentary work is directed disabled under the grids — which made a two-question cross-examination decisive.

Part VIII: The categories of impairment, and what each case actually needs

The sequential evaluation is the same for everyone. The evidence that wins is not.

Musculoskeletal — spine, joints, and the most common disability claim. The listings require specific findings: documented compromise of a nerve root or the spinal cord, with a defined pattern of radicular signs, a positive straight-leg raising test in both sitting and supine positions where applicable, and either an inability to use one upper extremity for work-related activities or a documented need for a walker, bilateral canes, or a wheelchair. Most claimants do not meet these. The case is therefore usually won at Steps 4 and 5, on an RFC limiting the claimant to sedentary work — which, combined with age fifty or above and no transferable skills, frequently directs a finding of disabled under the grids. What the file needs: imaging with correlating clinical findings, a documented course of conservative treatment, and a function-by-function opinion addressing sitting tolerance, standing and walking, lifting, and the need to alternate positions.

Mental impairments. Evaluated using the "paragraph B" criteria — understanding, remembering, or applying information; interacting with others; concentrating, persisting, or maintaining pace; and adapting or managing oneself — rated on a five-point scale, with a listing met by one extreme or two marked limitations. There is also a "paragraph C" route for serious and persistent disorders with ongoing treatment and marginal adjustment. What the file needs: consistent treatment records, a treating psychiatrist or therapist opinion in the same four-domain vocabulary the regulations use, and evidence of decompensation under stress — because the central vocational question is not whether the claimant can perform a simple task once, but whether the claimant can sustain performance over a forty-hour week.

Chronic pain, fibromyalgia, and conditions without imaging correlates. The agency requires a medically determinable impairment established by objective evidence, which makes these claims difficult. Fibromyalgia has its own ruling establishing how it may be established as medically determinable — through specified criteria including tender points or repeated manifestations of symptoms — and the claim then turns on symptom evaluation. What the file needs: a longitudinal record, a specialist's diagnosis meeting the ruling's criteria, documented exclusion of alternative causes, and a careful daily-activity narrative that does not overstate function.

Cardiac, pulmonary, and other systemic conditions. These listings are relatively objective — ejection fraction, exercise tolerance testing, FEV1 values corrected for height, documented exacerbations requiring specific interventions within a stated period. Read the listing and get the test. A claimant three percentage points from meeting a cardiac listing whose physician has not ordered the qualifying study is losing a case for a reason that is entirely fixable.

Cancer. Many oncologic listings are met on diagnosis and stage alone, and the Compassionate Allowances program flags certain conditions for expedited processing. Check the list before assuming a long wait.

Neurological and cognitive conditions. Traumatic brain injury, multiple sclerosis, epilepsy, and stroke each have listings with specific documentation requirements — seizure frequency documented over a period despite adherence to prescribed treatment, for example, with a description of the seizures from someone who has witnessed them.

Substance use. If drug addiction or alcoholism is a contributing factor material to the determination of disability, benefits are denied. The analysis asks whether the claimant would still be disabled if the substance use stopped. This is a factual inquiry that requires periods of documented sobriety in the record to resolve favorably, and it is one of the most difficult issues in the practice.

Obesity is no longer a listing but must be considered at every step for its effect in combination with other impairments — a point ALJs sometimes omit and reviewing courts frequently notice.

Part IX: Why claims are denied, and what each denial actually means

Denial notices are formulaic, and the formula conceals the reasoning. Decoding it tells you what to do next.

"Your condition is not severe enough." Usually a Step 2 or Step 5 conclusion. If the medical evidence is thin, the answer is more records, a specialist opinion, and a function-by-function statement. If the evidence is adequate but the RFC is too generous, the answer is a targeted attack on the RFC at the hearing.

"You can do your past work." A Step 4 denial. Two lines of attack: the RFC is wrong, or the past work was mischaracterized — the exertional level, the skill level, or whether it was performed long enough and recently enough to be "past relevant work" at all. Job descriptions the claimant supplies at the application stage are frequently the source of this error, because claimants describe their jobs by title rather than by physical demands.

"You can do other work." A Step 5 denial. Attack the VE testimony, the job numbers, DOT conflicts, and the omitted limitations, and check the grid rules for the claimant's age category.

"You do not have enough work credits." A technical denial, not a medical one. Check the earnings record for missing years — self-employment income not reported, wages under a different name after a marriage, or an employer that failed to report. Earnings records can be corrected.

"Your income or resources are too high." An SSI denial. Check the resource valuation: an excluded home, one vehicle, household goods, burial funds within limits, and certain retirement and ABLE account assets may have been counted incorrectly.

"You did not cooperate." A denial for failure to attend a consultative examination or return a form. Frequently the notice went to an old address. Ask for reopening and good cause.

"You are working." A Step 1 denial. Check whether the work was an unsuccessful work attempt, whether impairment-related work expenses reduce countable earnings below SGA, and whether a subsidy or special condition applies.

The single most common structural error in denials is failure to account for the combined effect of multiple impairments. Any one of a claimant's conditions may be manageable. The combination — pain that disrupts sleep, medication that impairs concentration, depression that reduces persistence — is what precludes sustained work, and it is exactly what a series of single-system analyses will miss.

Part X: Frequently asked questions

"Should I get a lawyer?" Represented claimants prevail at meaningfully higher rates, particularly at the hearing level, and the fee is contingent, capped, and approved by the agency — meaning it costs nothing unless benefits are awarded and it comes out of past-due benefits rather than ongoing ones. There is very little downside.

"Should I reapply or appeal?" Appeal. Reapplying restarts the clock, forfeits back benefits, and usually produces the same denial from the same office on the same record. The only circumstance favoring a new application is a genuinely new impairment arising after the prior decision, and even then the appeal should usually proceed in parallel.

"How long will this take?" Initial decisions in a few months; reconsideration a few more; a hearing typically many months to more than a year after the request. Cases involving terminal conditions, Compassionate Allowances conditions, dire-need circumstances, or certain military service connections can be expedited on request — ask.

"Can I work at all while my claim is pending?" Below the SGA threshold, yes. But work is evidence, and part-time work is used to argue capacity. Keep the hours and duties documented, and understand that work performed with substantial accommodation or that ends because of the impairment may qualify as an unsuccessful work attempt.

"My doctor wrote a letter saying I'm disabled. Isn't that enough?" No — and it is worth almost nothing. Disability is an issue reserved to the Commissioner. What has value is a function-by-function statement: pounds, minutes, hours, absences, and off-task percentage, each with a stated objective basis.

"What if I can't afford treatment?" Say so, in the record. The rules require consideration of the reasons for gaps in treatment, including inability to pay, lack of insurance, transportation, and mental impairment affecting insight. An unexplained gap is used against a claimant; an explained one usually is not.

"They want me to see their doctor." Attend. Failure to attend a consultative examination without good cause is a ground for denial. Be accurate — neither dramatic nor stoic — and write down afterward how long the examination lasted and what was actually done.

"What happens at the hearing?" It is informal — a small room, the ALJ, a hearing reporter, usually a vocational expert by telephone or video, and sometimes a medical expert. There is no government attorney. Expect to be asked about a typical day, why you stopped working, what you can lift and how long you can sit and stand, your medications and their side effects, and whether you can do any of your past jobs. Answer about your worst functioning honestly and about your best honestly too; overstatement is the most common way credible claimants lose.

"They approved me but the onset date is wrong." That is appealable, and it can be worth many months of benefits. A partially favorable decision is still a decision you may appeal — within sixty days.

"I got a notice saying I was overpaid thousands of dollars." File a request for waiver immediately. A pending waiver request generally suspends recovery. Waiver requires that you were without fault and that recovery would defeat the purpose of the Act or be against equity and good conscience — and living on benefits with no ability to repay is precisely the circumstance the standard contemplates.

Primary authority

42 U.S.C. § 423 — disability insurance benefits.
42 U.S.C. § 1382c and § 1383 — SSI definitions and procedure.
42 U.S.C. § 405 — evidence, procedure, and judicial review under § 405(g).
42 U.S.C. § 406 — representation and fees; 42 U.S.C. § 407 — assignment and garnishment protection.
42 U.S.C. § 421 — state disability determinations.
20 C.F.R. Part 404 · Part 416 · Part 422 — the sequential evaluation, the Listings, RFC, the grids, and agency procedure.
28 U.S.C. § 2412 — the Equal Access to Justice Act.
Bowen v. Yuckert, 482 U.S. 137 (1987) · Sullivan v. Zebley, 493 U.S. 521 (1990) · Richardson v. Perales, 402 U.S. 389 (1971) · Mathews v. Eldridge, 424 U.S. 319 (1976) · Sims v. Apfel, 530 U.S. 103 (2000) · Barnhart v. Walton, 535 U.S. 212 (2002) · Gisbrecht v. Barnhart, 535 U.S. 789 (2002) · Barnhart v. Thomas, 540 U.S. 20 (2003) · Biestek v. Berryhill, 587 U.S. 97 (2019) · Smith v. Berryhill, 587 U.S. 471 (2019) · Carr v. Saul, 593 U.S. 83 (2021).
Social Security Rulings and the Program Operations Manual System, which are the agency's operative interpretive guidance.