The Five Things Social Security Checks

To receive SSDI, you must meet five separate requirements. Social Security does not weigh them equally—you can have four of them perfect and still be denied if you fail the fifth. The five are: you must have a medical condition that meets Social Security's definition of disability, you must have enough work credits, you must have earned those credits recently enough, your 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 substantial gainful activity level.

This section covers the first four. Work credits are covered in the Work Credits section of this guide. The substantial gainful activity rule—what counts as "too much work"—is covered separately because it changes year to year and affects people already receiving SSDI as much as new applicants.

Key Takeaways

  • You need a medical condition that Social Security recognizes as disabling, documented by medical records from a doctor or hospital, not just your own statement.
  • Your condition must have lasted or be expected to last at least 12 months, or be expected to result in death—conditions expected to improve within a year do not count.
  • You must have earned enough work credits in the years before you became disabled, with the number required depending on your age when you became disabled.
  • You must have earned those credits recently enough—generally, you need to have worked in at least 5 of the 10 years before you became disabled.
  • Even if you meet all four of these requirements, you cannot earn more than the annual substantial gainful activity amount, which Social Security updates each year.

Medical Condition That Meets Social Security's Definition

Social Security does not use the word "disability" the way most people do. You can be unable to work at your job and still not meet Social Security's definition. Social Security requires that your condition prevent you from doing substantial gainful activity—not just your current job, but any job that exists in the economy—for at least 12 months.

Social Security maintains a list called the Blue Book, which describes medical conditions that automatically meet the disability standard. The Blue Book covers conditions like advanced cancer, severe arthritis, blindness, deafness, heart failure, and many others. If your condition is in the Blue Book and your medical records show you meet the specific criteria listed, Social Security will find you disabled without asking whether you could do other work.

If your condition is not in the Blue Book, Social Security will evaluate whether it prevents you from doing any work. This is harder to prove and takes longer. You will need medical records from a doctor or hospital—not just a letter from your doctor saying you cannot work, but actual test results, imaging, treatment notes, and clinical findings that show the severity of your condition.

Duration: 12 Months or Expected Death

Your condition must have already lasted 12 months, or Social Security must reasonably expect it to last 12 months, or it must be expected to result in death. This is a strict rule. A condition that will improve within a year—even if you are completely unable to work right now—does not count.

The 12-month clock starts when your condition began, not when you applied for SSDI. If you had a stroke 14 months ago and applied last month, you have already met the duration requirement. If you had a stroke 10 months ago, you have not, even if you are severely disabled right now. Social Security will usually approve your case but backdate your benefits to start after the 12-month mark has passed.

For conditions expected to result in death, Social Security does not require you to wait 12 months. If you have terminal cancer with a prognosis of less than 12 months, you can be found disabled when ready. You will need medical records that document the terminal diagnosis and the expected timeline.

Work Credits: How Many You Need

Work credits are earned by paying Social Security payroll taxes. You earn one credit for each $1,550 of wages you earn in a calendar year (this amount changes annually). You can earn a maximum of four credits per year, regardless of how much you earn. So if you earn $6,200 in a year, you still earn only four credits.

The number of credits you need depends on your age when you became disabled. If you became disabled at age 24 or younger, you need six credits earned in the three years before you became disabled. If you became disabled between ages 24 and 31, you need one credit for each year since age 21, up to a maximum of 20 credits. If you became disabled at 31 or older, you need 20 credits.

These numbers sound abstract. In practice: if you are 35 and became disabled, you need 20 credits. At four credits per year, that is five years of work. If you are 25 and became disabled, you need six credits, which is roughly 18 months of work. If you are 22 and became disabled, you need six credits earned in the three years since you turned 19.

Recency: When You Earned Those Credits

Having enough credits is not enough. You must have earned them recently enough. The rule is called the recency requirement. In general, you must have earned at least 20 of your required credits in the 10 years before you became disabled. For people who became disabled before age 31, the rule is different—you must have earned credits in at least half the quarters between age 21 and the quarter you became disabled.

This rule prevents someone from working for five years at age 20, then becoming disabled at age 50 and collecting SSDI on credits earned 30 years ago. If you became disabled at 50 and need 20 credits, you must have earned at least 20 of them in the 10 years before age 50—that is, between ages 40 and 50.

If you do not meet the recency requirement, you may still be able to receive Supplemental Security Income (SSI), which is a different program with different rules. SSI does not require work credits at all, but it has strict income and asset limits. The SSI section of this guide covers how to determine whether you might be may be able to access for that program instead.

Substantial Gainful Activity: The Annual Earnings Limit

Even if you meet all four requirements above, you cannot earn more than the annual substantial gainful activity (SGA) amount. For 2024, the SGA limit is $1,550 per month, or $18,600 per year. This amount changes each year. If you earn more than this amount, Social Security will find that you are working and deny your claim, or stop your benefits if you are already receiving them.

The SGA limit applies to your gross earnings—the amount before taxes. It does not matter whether you are self-employed or work for an employer. It does not matter whether you work full-time or part-time. If your monthly earnings exceed the limit, you are over the threshold.

There are some narrow exceptions. If you are blind, the SGA limit is higher—$2,590 per month in 2024. If you are in a trial work period (a period where Social Security lets you test your ability to work without losing benefits), you can earn above the SGA limit for nine months. These exceptions are covered in the work incentives section of this guide.

How Social Security Verifies Your Information

When you explore, Social Security will request your medical records directly from your doctors and hospitals. You do not need to gather them yourself, though you can speed up the process by providing them. Social Security will also verify your work history using your Social Security earnings record, which is based on the W-2 forms and self-employment tax returns you filed.

If there are gaps or errors in your earnings record, you can request a corrected statement from Social Security. This is important because an incorrect record could cause you to fall short of the work credit requirement. You can request your earnings record online at ssa.gov or by visiting a local Social Security office.

For the medical evaluation, Social Security may also send you to a doctor they choose, called a consultative examination. This is a one-time appointment, usually free to you, where a doctor examines you and reports back to Social Security. You cannot refuse a consultative examination without a good reason—if you do, Social Security will usually deny your claim.

Frequently Asked Questions

What if I became disabled before I had time to earn enough work credits?

If you are under 31 and do not have enough credits, you cannot receive SSDI. You may be able to receive SSI instead, which does not require work credits. SSI has strict income and asset limits, but if you have little income or savings, you might may have access to. The SSI section of this guide explains the income and asset rules.

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

Yes. The Blue Book is a shortcut—if your condition is listed and you meet the criteria, you are automatically disabled. If your condition is not listed, Social Security will evaluate whether it prevents you from doing any work. This takes longer and requires strong medical evidence, but it is possible to be found disabled without being in the Blue Book.

Does Social Security count self-employment income toward work credits?

Yes. If you are self-employed, you pay self-employment tax on your net profit, and that counts toward work credits the same way W-2 wages do. You earn one credit for each $1,550 of net self-employment income, up to four credits per year. You will need to file tax returns to prove your self-employment income.

What happens if I worked in another country?

Work you did in another country generally does not count toward Social Security work credits, with some exceptions. If you worked for the U.S. government abroad, or if you worked in a country that has a totalization agreement with the United States, some of that work may count. Contact your local Social Security office to discuss your specific situation.

If I am denied, can I reapply later?

Yes. If you are denied because your condition has not lasted 12 months yet, you can reapply after the 12-month mark. If you are denied because you do not have enough work credits, you can reapply once you have earned more credits. If you are denied for other reasons, you can appeal the decision or reapply if your condition worsens or your circumstances change.