The Five Things Social Security Checks

To receive SSDI, you must meet five separate requirements. Social Security does not check them all at once — they review your work history first, then your medical condition, then your age and citizenship. Understanding what each one means helps you gather the right documents before you file.

The five requirements are: enough work credits for your age, a medical condition that meets Social Security's definition of disability, that the condition has lasted or is expected to last at least 12 months or result in death, that you are not working above the substantial gainful activity level, and that you are a U.S. citizen or national or a lawful permanent resident who has been in the country for at least five years.

Key Takeaways

  • You need a certain number of work credits based on your age when you became disabled — typically 20 credits earned in the 10 years before you stopped working.
  • Your medical records must show a condition that prevents you from doing any substantial work, not just your old job, and the condition must be expected to last at least 12 months.
  • Social Security uses its own list of conditions that automatically meet the disability standard; if your condition is not on the list, you must prove it is equally severe.
  • You cannot earn more than a set monthly amount (currently $1,550 for non-blind individuals) while receiving SSDI, though some work incentives allow you to test your ability to work.
  • Citizenship or lawful permanent resident status for at least five years is required, and you must provide documents proving your status.

Work Credits: The Earnings Record Requirement

Social Security measures your work history in work credits, not years of employment. You earn one credit for each $1,640 of wages you report to Social Security in 2024 (this amount changes yearly). You can earn a maximum of four credits per year, regardless of how much you earn.

The number of credits you need depends on your age when your disability began. If you became disabled before age 24, you need six credits earned in the three years before you stopped working. If you were between 24 and 31, you need credits equal to one for each year since you turned 21, up to a maximum of 20. If you were 31 or older, you typically need 20 credits earned in the 10 years when ready before you became unable to work.

You can check your work history by creating an account on ssa.gov and viewing your Social Security Statement. This statement shows the credits Social Security has recorded for each year you worked. If you see errors — missing wages, wages credited to the wrong year, or wages not credited at all — you can request a correction by contacting Social Security with your tax returns or W-2 forms as proof.

Medical Evidence: What Social Security Needs From Your Doctor

Your medical records are the foundation of your SSDI case. Social Security needs evidence that shows when your condition started, how it limits your ability to work, what treatment you have received, and how you respond to that treatment. This evidence comes from your treating doctors, hospital records, lab results, and imaging studies — not from your own description of your symptoms.

Bring or request records from every doctor, specialist, hospital, and clinic that has treated you for your condition. Include records from your primary care doctor even if they are not specialists in your condition, because Social Security wants a complete picture of your health. For mental health conditions, records from a psychiatrist or psychologist are especially important. For pain conditions, imaging studies (X-rays, MRI, CT scans) and nerve conduction tests carry more weight than pain descriptions alone.

The records must be recent — ideally from the past three months — and must show ongoing treatment. If you have not seen a doctor in several months, Social Security will likely ask you to get a new evaluation before they make a decision. If you cannot afford treatment, tell Social Security during the process process; they may send you to a doctor at no cost to you.

Meeting Social Security's Definition of Disability

Social Security has a specific definition of disability that is stricter than most people's everyday use of the word. You must have a medical condition that prevents you from doing any substantial work, not just your previous job. Substantial work means earning $1,550 per month or more (for non-blind individuals in 2024; the amount is higher for blind individuals).

Social Security maintains the Blue Book, a list of conditions that automatically meet the disability standard if your medical records match the criteria listed for your condition. The Blue Book covers conditions in categories like musculoskeletal disorders, respiratory system disorders, cardiovascular conditions, mental disorders, neurological conditions, and many others. If your condition is in the Blue Book and your records match the criteria, Social Security can approve you without further evaluation.

If your condition is not in the Blue Book or your records do not match the Blue Book criteria exactly, Social Security must evaluate whether your condition is medically equivalent — meaning it is as severe as a condition on the list. This requires detailed medical evidence showing how your symptoms limit your ability to sit, stand, walk, lift, carry, concentrate, remember instructions, and interact with others. Social Security may send you to a doctor they choose (called a consultative examination) to gather this evidence.

Duration: The 12-Month Rule

Your condition must have lasted, or be expected to last, at least 12 months, or it must be expected to result in death. This is a strict rule with no exceptions. If your condition is temporary — even if it is severe right now — you do not meet the definition of disability for SSDI purposes.

When you file, you must state when your condition began and when you expect it to improve or resolve. If your condition began less than 12 months ago but your doctor states it will last at least 12 months, Social Security will approve you but your benefits will not start until 12 months have passed since your condition began. This waiting period is called the elimination period.

If your condition has improved or resolved by the time Social Security reviews your case, they will deny your claim even if it was severe when you filed. This is why it is important to file as soon as you believe you meet the definition of disability — waiting longer does not help you, and it delays the start of your benefits.

Work Activity and Substantial Gainful Activity Limits

You cannot be working at a substantial gainful activity level and receive SSDI. For 2024, substantial gainful activity means earning $1,550 per month or more for non-blind individuals, or $2,590 per month or more for blind individuals. If you earn more than these amounts, Social Security will deny or stop your benefits.

However, SSDI includes work incentives that let you test your ability to work without losing benefits when ready. The Trial Work Period allows you to earn any amount for nine months (not necessarily consecutive) without affecting your benefits. After the Trial Work Period ends, you enter the Extended may be able to access Period, during which you can earn up to the substantial gainful activity limit for 36 additional months while keeping some benefits. During this time, you pay Medicare premiums but keep your health coverage.

If you return to work and earn above the substantial gainful activity limit, your benefits stop, but you do not lose your SSDI status. If your work does not last and you stop earning above the limit, your benefits can restart without a new process — Social Security calls this a expedited reinstatement.

Citizenship and Residency Status

You must be a U.S. citizen, a U.S. national, or a lawful permanent resident (green card holder) who has been in the United States for at least five years. Undocumented immigrants and temporary visa holders do not meet this requirement, even if they have work credits.

When you file for SSDI, bring a document proving your status. For citizens, this can be a birth certificate, passport, or naturalization certificate. For lawful permanent residents, bring your green card and proof of the date you received it (such as an I-94 arrival record or a letter from USCIS). If you became a permanent resident fewer than five years ago, you do not yet meet the requirement, but you can file and Social Security will approve you once five years have passed.

Documents to Gather Before You File

Collect these documents before you contact Social Security. Having them ready speeds up the process and reduces the chance that Social Security will need to contact you for missing information.

For work history: your Social Security card, a list of all employers for the past 15 years with dates of employment, and your most recent tax return or W-2 forms. For medical evidence: records from all doctors and hospitals that have treated you, including dates of visits, diagnoses, test results, and current medications. For citizenship: your birth certificate or passport. For income and resources: recent bank statements, investment account statements, and life insurance policies (Social Security counts some of these toward resource limits). For family information: if you have a spouse or children under 19 who live with you, bring their birth certificates and Social Security numbers, because they may be able to receive benefits based on your record.

Frequently Asked Questions

Do I need to be unable to work at all to get SSDI?

Yes, Social Security's definition requires that you cannot do any substantial work, not just your previous job. You can have some remaining ability — you do not need to be completely bedridden — but you cannot be able to work and earn $1,550 per month or more. If you can do any job that pays that amount, even if it is not your old job, Social Security will likely deny your claim.

What if I do not have recent medical records?

Contact your doctor and request an appointment. If you cannot afford treatment, tell Social Security during your process; they can send you to a doctor at no cost. If you have not seen a doctor in over a year, Social Security will almost certainly ask for a new evaluation before they decide your case. The longer you wait to file, the older your records become and the harder it is to prove your condition is still disabling.

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

Yes. If your condition is not in the Blue Book, Social Security must evaluate whether it is medically equivalent — as severe as a condition on the list. This requires detailed medical evidence showing how your symptoms limit your ability to work. It takes longer to approve cases that are not in the Blue Book, but approval is possible with strong medical evidence.

What happens if I earned work credits but then did not work for several years?

Your credits do not expire, but Social Security has a recency requirement. For most ages, you need at least 20 credits earned in the 10 years before you became disabled. If you stopped working more than 10 years ago, you may not have enough recent credits even if you earned 20 credits total in your lifetime. Check your Social Security Statement to see whether your credits meet the recency requirement for your age.

Can I file for SSDI while I am still working?

Yes, you can file while working, but you cannot be earning above the substantial gainful activity limit ($1,550 per month in 2024). If you are earning more than that, Social Security will deny your claim. If you are earning less, you can file, and if you are approved, your benefits will start the month after you stop working or reduce your earnings below the limit.