The Five Requirements You Must Meet for SSDI

Social Security Disability Insurance has five separate requirements, and you must meet all of them. You need enough work credits for your age, a medical condition that meets Social Security's definition of disability, medical evidence to support that condition, the condition must have lasted or be expected to last at least 12 months or result in death, and you must not be working above the earnings limit. Missing even one disqualifies you, regardless of how strongly you meet the other four.

This guide covers what each requirement means in practice and what Social Security actually looks for when they review your case. The work credits piece is covered separately in the Work Credits section — this focuses on the medical and work-related parts of the decision.

Key Takeaways

  • You must have enough work credits for your age, a medical condition that meets Social Security's strict definition, medical records documenting that condition, proof the condition will last at least 12 months or cause death, and earnings below the monthly limit.
  • Social Security's definition of disability is narrower than most people think — the condition must prevent you from doing any substantial work, not just your current job.
  • Medical evidence means actual test results, doctor's notes, and treatment records, not your own statement about how sick you are.
  • You can earn up to a set amount per month and still receive SSDI, but exceeding that limit stops your benefits that month.
  • The 12-month duration requirement means either your condition has already lasted that long or a doctor must state it will.

Medical Condition Must Meet Social Security's Definition of Disability

Social Security does not pay for being unable to work at your job. It pays only when a medical condition prevents you from doing any substantial work — meaning any job that exists in the economy, not just the one you had before. This is the single most common reason claims are denied.

Your condition must be severe enough that it significantly limits your ability to do basic work activities. Social Security calls these activities things like sitting, standing, walking, remembering instructions, concentrating, and interacting with others. If you can do these things for eight hours a day, five days a week, Social Security will likely say you can work, even if you cannot do your old job.

Social Security also maintains a list called the Blue Book of conditions that automatically meet the disability standard if your medical records show you have that condition and it is at the severity level described. Conditions on this list include advanced cancer, severe heart disease, end-stage renal disease, and others. If your condition is on the Blue Book and your records match the criteria, the medical part of the decision is faster. If your condition is not on the list, Social Security must still consider it, but the bar is higher.

You Must Have Medical Evidence, Not Just Your Statement

Social Security requires actual medical records — test results, imaging reports, doctor's notes from office visits, hospital discharge summaries, lab work, and treatment records. Your own description of your symptoms is not enough, even if it is detailed and honest. A doctor or other medical professional must have documented the condition in writing during an actual examination or treatment.

The medical evidence must show what is wrong with you, how it was found (the test or exam that discovered it), and how it affects your ability to function. For example, "patient reports back pain" in a doctor's note is weaker than "MRI shows herniated disc at L4-L5 with nerve compression; patient reports numbness in left leg and cannot sit more than 30 minutes." Social Security looks for objective findings — things a doctor observed or measured — alongside your reported symptoms.

If you have not seen a doctor in months or years, Social Security will ask you to get a medical exam. They may pay for this exam through a consultative examination, or they may deny your case because there is no recent evidence. The longer the gap between your last medical visit and your SSDI process, the harder it is to prove the condition is current and disabling.

The Condition Must Last 12 Months or Result in Death

Your medical condition must either have already lasted 12 months or a doctor must state in writing that it will last at least 12 months. SSDI is not for temporary illnesses or injuries. If you broke your leg and will recover in three months, you do not meet this requirement. If you have cancer with a prognosis of six months to live, you do meet it because the condition will result in death.

The 12-month clock starts from when the condition began, not from when you applied for SSDI. If your condition started two years ago and you are explore now, you have already met this requirement. If your condition started three months ago, you have not — but you can still explore, and Social Security will hold your case until either 12 months have passed or a doctor provides a statement that the condition will last that long.

This requirement trips up people with conditions that are genuinely disabling but might improve. A severe back injury, for example, might be completely disabling right now but could improve with surgery and physical therapy. If a doctor thinks you might recover within 12 months, Social Security will likely deny your case, even if you are currently unable to work.

Your Earnings Cannot Exceed the Monthly Limit

SSDI has a monthly earnings limit called Substantial Gainful Activity, or SGA. In 2024, the limit is $1,550 per month for non-blind individuals and $2,590 for blind individuals. These amounts change each year. If you earn more than the limit in any month, you are considered to be working at a substantial level, and Social Security will stop your benefits for that month.

The earnings limit applies to work you do, whether you are self-employed or working for someone else. It includes wages, net profit from self-employment, and certain other forms of income. It does not include Social Security retirement benefits, Supplemental Security Income, food stamps, housing information, or investment income.

You can work below the limit and still receive SSDI. Many people do — they work part-time or in a limited capacity while receiving benefits. Social Security also has a program called the Trial Work Period that lets you test your ability to work for nine months without losing benefits, even if you exceed the earnings limit during those months. After the Trial Work Period ends, the monthly limit applies again.

You Must Have Enough Work Credits for Your Age

The work credits requirement is covered in detail in the Work Credits section, but the basic rule is this: you must have worked long enough and recently enough to have earned the credits Social Security requires for your age. The number of credits you need depends on how old you are when you explore. Younger workers need fewer credits; older workers need more.

You earn work credits by paying Social Security taxes on your wages or self-employment income. In 2024, you earn one credit for each $1,730 in earnings, up to four credits per year. You need at least six credits to have ever worked enough to be considered, and most people need between 20 and 40 credits depending on their age.

If you do not have enough work credits, you do not meet the requirement, and Social Security will deny your case. You cannot make up for missing credits by having a severe medical condition. The work history requirement is separate and absolute.

How Social Security Reviews All Five Requirements Together

Social Security does not review these requirements in a particular order, but they do review all of them. If you fail any one, your case is denied. The order in which Social Security looks at them can vary — sometimes they check work credits first, sometimes they start with the medical evidence. But the result is the same: you must meet all five.

When you receive a denial letter, it will tell you which requirement or requirements you did not meet. Common denials say things like "you do not have enough work credits," "your condition does not meet our definition of disability," "your medical evidence does not support the severity you describe," or "you are working above the substantial gainful activity limit." Understanding which requirement you did not meet is the first step in deciding whether to appeal or reapply.

Frequently Asked Questions

Can I get SSDI if my condition is not on the Blue Book?

Yes. The Blue Book is a shortcut — if your condition is on it and your medical records match the criteria, approval is faster. But Social Security will consider any condition that prevents you from doing any substantial work, even if it is not on the Blue Book. You will need stronger medical evidence to prove it is disabling.

What if I have not worked in five years — can I still get SSDI?

It depends on your age and how many work credits you earned before you stopped working. Work credits do not expire, so credits you earned years ago still count. But you also need recent work credits — Social Security requires that you have worked within a certain window before you became disabled. The exact window depends on your age. Check the Work Credits section for the specific rule for your age.

Does Social Security count my own description of my symptoms as medical evidence?

No. Social Security needs records from a doctor or other medical professional who examined or treated you. Your statement about your symptoms is part of your case, but it is not medical evidence by itself. The doctor's notes, test results, and treatment records are what Social Security uses to decide whether your condition is real and disabling.

If I work part-time and earn $1,400 a month, will I lose my SSDI?

No, because $1,400 is below the 2024 limit of $1,550. You can work and receive SSDI as long as your monthly earnings stay below the limit. If you earn $1,600 one month, you would lose benefits for that month only, not permanently. The limit resets each month.

Can I appeal if Social Security says my condition will not last 12 months?

Yes. You can appeal and provide new medical evidence, such as an updated statement from your doctor saying the condition will last longer than expected, or evidence that the condition has already lasted longer than Social Security thought. Appeals are covered in a separate section on this site.