You need two things: a medical condition that meets Social Security's definition of disability, and enough work credits from your earnings history.

Social Security Disability Insurance (SSDI) is not available to everyone with a medical condition. The program has two separate gates. First, your condition must be severe enough that Social Security considers you unable to work for at least 12 months or result in death. Second, you must have earned enough work credits through payroll taxes during your working years. Both must be true. A person with a may have access to condition but no work history will not receive SSDI. A person with 40 work credits but no may have access to condition will not receive SSDI either.

This article explains who meets these two requirements and what happens when you do not meet one of them.

Key Takeaways

  • Your medical condition must prevent you from doing substantial work for 12 months or longer, or be expected to result in death—not just make work difficult or uncomfortable.
  • You earn one work credit for every $1,550 of wages you earn in a year (the dollar amount changes yearly), and you can earn a maximum of four credits per year.
  • Most people need 40 work credits total, with at least 20 earned in the 10 years before they become disabled.
  • If you became disabled before age 24, you may need fewer credits; if you became disabled between ages 24 and 31, you need credits for half the years between age 21 and the year you became disabled.
  • Having a work history is not the same as having enough work credits—you must have earned income subject to Social Security tax, not just held a job.

The Medical Requirement: What "Disability" Means to Social Security

Social Security uses a specific definition of disability that is narrower than most people expect. Your condition must prevent you from doing any substantial gainful activity—meaning work that produces income. The condition must last at least 12 months, be expected to last that long, or result in death. Pain, fatigue, or difficulty concentrating alone do not meet this standard, even if they are real and documented by a doctor.

Social Security maintains a list called the Blue Book that describes conditions it recognizes as disabling. The list includes categories like cancer, heart disease, arthritis, mental illness, and neurological conditions, but only when they meet specific severity thresholds. For example, depression alone does not may have access to, but depression with documented inability to function in a work setting may. A back injury that causes pain does not may have access to, but a back injury with nerve damage causing documented loss of function in both legs might.

If your condition is not on the Blue Book, you can still receive SSDI if you can show that your condition is as severe as one that is listed. This requires detailed medical evidence: test results, imaging, treatment records, and statements from your doctors about what you cannot do physically or mentally.

The Work Credit Requirement: How Many Credits You Need

Work credits are earned through payroll taxes. When your employer withholds Social Security tax from your paycheck, or when you pay self-employment tax, you are earning work credits. In 2024, you earn one work credit for every $1,550 of wages you earn in a calendar year. You can earn a maximum of four credits per year, regardless of how much you earn above that threshold.

Most people who become disabled need 40 work credits total. However, you cannot straightforward accumulate 40 credits over a lifetime and then stop working. You must have earned at least 20 of those 40 credits in the 10-year period when ready before you became disabled. This is called the "recency requirement." If you worked steadily for 10 years and then stopped working, you would have the 40 credits, but if you became disabled more than 10 years after you stopped working, you would not meet the recency requirement.

The dollar amount needed to earn one credit changes each year. Social Security announces the new amount in October for the following year. If you are self-employed, you must report your net earnings on your tax return, and Social Security will count those earnings toward your credits.

Younger Workers: Different Credit Requirements

If you became disabled before age 24, you need fewer credits. You need six work credits earned in the three-year period before you became disabled. This recognizes that younger people have not had time to build a full work history.

If you became disabled between ages 24 and 31, the requirement is more flexible. You need credits for half the years between age 21 and the year you became disabled. For example, if you became disabled at age 28, that is seven years from age 21. Half of seven is 3.5, which rounds to four credits. Those credits must be earned in the six-year period before you became disabled.

After age 31, the standard 40-credit requirement applies, with the 20-credit recency rule.

Work That Does Not Count Toward Credits

Not all work counts. Government jobs held before 1984 may not count if your employer did not withhold Social Security tax. Work done as an independent contractor where you did not pay self-employment tax does not count. Informal work—cash jobs, household work, or work for family members—does not count unless self-employment tax was paid on it.

If you worked for a railroad, your railroad retirement credits are separate from Social Security credits, though railroad employment can sometimes count toward Social Security under specific rules. If you worked for a state or local government and were not covered by Social Security, those years do not count.

Military service before 1957 may count as credits under special rules. If you served on active duty after 1956, your military service does not directly earn credits, but you receive wage credits added to your record.

When You Do Not Have Enough Credits

If you do not have enough work credits, you cannot receive SSDI. There is no exception and no way to waive the requirement. However, you may be able to receive Supplemental Security Income (SSI) instead, which is a needs-based program that does not require work credits. SSI has different rules: it looks at your current income and resources, not your work history. If your income and resources are below the limit, you may may have access to for SSI even with no work credits.

If you are close to having enough credits—for example, you have 38 credits and need 40—you cannot receive SSDI until you earn two more credits. You would need to return to work and earn at least $3,100 in a calendar year to earn two more credits (assuming 2024 rates). If your disability prevents you from working, you cannot earn those credits, and you cannot receive SSDI.

How to Check Your Work Credits

You can view your work credits on your Social Security account at ssa.gov. Create a my Social Security account, sign in, and go to "Earnings Record." The page shows the wages Social Security has recorded for each year you worked and the credits you earned in each year. Check this record for accuracy before you file for SSDI. If wages are missing or incorrectly recorded, contact Social Security to correct them. You have a limited time to correct old records, so do this as soon as you notice an error.

If you do not have an online account, you can request a paper copy of your earnings record by completing Form SSA-7050-F and mailing it to your local Social Security office. The form is available at ssa.gov.

Frequently Asked Questions

Can I receive SSDI if I have a condition on the Blue Book but have not worked in five years?

Only if you have enough work credits with at least 20 earned in the 10 years before you became disabled. If you stopped working five years ago and became disabled at that time, you would need to have earned 20 credits in the five years before that. If you did not, you do not meet the work credit requirement, even with a Blue Book condition.

Does volunteer work count toward work credits?

No. Volunteer work does not generate payroll taxes and does not earn work credits. Only paid work where Social Security tax is withheld or self-employment tax is paid counts toward credits.

What if I worked in another country before moving to the United States?

Work in another country generally does not count toward U.S. Social Security credits. However, the United States has totalization agreements with some countries that allow work in those countries to count under certain conditions. Contact Social Security to ask whether your country of employment has a totalization agreement with the United States.

Can I get SSDI based on my spouse's work credits?

No. SSDI is based only on your own work credits. However, if your spouse receives SSDI or retirement benefits, you may be able to receive benefits as a spouse or ex-spouse based on their record, but that is a different program with different rules.

If I return to work and earn more credits, can I then receive SSDI?

Only if your medical condition still meets the disability standard at the time you file. If you return to work, Social Security may conclude that you are no longer disabled, which would disqualify you regardless of your work credits. The two requirements must both be met at the time you file.