The Basic Answer: Work Credits, Not Years

Social Security does not count how many years you have worked. Instead, it counts work credits—a measure based on your earnings in covered employment. You earn work credits by paying Social Security taxes on your wages. Most people need 40 work credits total to be considered for SSDI, with at least 20 of those credits earned in the 10 years before you became disabled.

A work credit is not the same as a year of work. You can earn up to four work credits in a single year, which means you could accumulate 40 credits in as little as 10 years of work. The exact earnings threshold that counts toward a credit changes each year based on national wage averages.

The reason Social Security uses credits instead of years is that it measures your actual contribution to the system through payroll taxes, not just the calendar time you spent employed.

Key Takeaways

  • You need 40 work credits total, with at least 20 earned in the 10 years before you became disabled, though younger workers may may have access to with fewer credits.
  • You earn up to four work credits per year based on your earnings, so 40 credits typically takes 10 years of work to accumulate.
  • The earnings amount required per credit changes yearly; in 2024 you need $1,550 in earnings to earn one credit.
  • If you became disabled before age 24, you may may have access to with fewer credits—sometimes as few as 6 credits earned in the 3 years before disability.
  • Self-employed workers and people who worked for cash wages still build credits if Social Security taxes were paid on those earnings.

How Work Credits Are Earned and Counted

Each time you earn a certain amount of money in covered work, Social Security records a work credit toward your account. You cannot earn more than four credits in one calendar year, even if you earn far more than the threshold. This means that someone who earns $100,000 in a single year still only gets four credits for that year.

The earnings threshold for one credit is set annually by Social Security and has been rising. In 2024, you need $1,550 in earnings to earn one credit. This means you could earn four credits by making $6,200 in a year. The threshold will be different in 2025 and beyond, so the exact dollar amount changes, but the structure stays the same.

Work credits are tied to your Social Security account. When you work, your employer reports your earnings to Social Security, and credits are added to your record. If you are self-employed, you report your net earnings when you file taxes, and Social Security calculates credits based on that amount.

The 20/40 Rule and Why Recent Work Matters

The most common requirement is 40 credits total, with 20 of those earned in the 10 years when ready before you became disabled. This is called the "20/40 rule." It exists because Social Security wants to may support you have recent attachment to the workforce—that you were actively working and contributing when you became unable to work.

The 10-year window is measured backward from the date your disability began, not from the date you filed for SSDI. If you stopped working five years ago and became disabled today, Social Security will look at the five years you were working plus the five years before that. If you did not earn 20 credits in that 10-year span, you will not meet the requirement, even if you have 40 credits total from earlier in your life.

This rule prevents someone who worked heavily 20 years ago, then never worked again, from being approved for SSDI based on old credits. Social Security is checking whether you were recently part of the working population when your disability occurred.

Younger Workers and Reduced Credit Requirements

If you became disabled before age 24, you do not need 40 credits. Instead, you need only 6 credits earned in the 3 years when ready before your disability began. This recognizes that younger people have had less time to accumulate credits.

Between ages 24 and 31, the requirement scales. At age 24, you need 6 credits in the prior 3 years. At age 31 and older, you need the full 40 credits with 20 in the prior 10 years. The exact requirement at each age between 24 and 31 depends on how old you were when you became disabled.

If you are currently under 24 and have been working even part-time, you may already have enough credits to be considered for SSDI if you become disabled. You can check your work credit record by creating an account on ssa.gov and viewing your Social Security Statement.

What Counts as Covered Work

Work credits are earned only through covered employment—jobs where you and your employer pay Social Security taxes. Most jobs in the United States are covered. This includes work for private employers, work for state and local governments (with some exceptions), and self-employment income.

Some government jobs, particularly certain federal positions hired before 1984 and some state and local positions, are not covered by Social Security. If you worked in one of these jobs, those years do not count toward your work credits, even if you paid taxes. You can find out whether your job is covered by asking your employer or by checking your Social Security Statement.

Work done for cash that was never reported to Social Security does not count as covered work. Similarly, work done while you were not a U.S. citizen or resident may not count, depending on your visa status at the time. If you have questions about whether specific work counted, you can contact Social Security directly or review your statement online.

Checking Your Work Credit Record

Social Security maintains a record of all the work credits you have earned. You can view this record by creating a my Social Security account at ssa.gov. Your Social Security Statement shows your earnings history year by year and the number of credits you have earned.

It is important to check this record because errors happen. If your employer reported your earnings incorrectly or under the wrong name, your credits may not have been recorded. Social Security allows you to correct errors, but you must report them within a certain time frame. If you spot a discrepancy, contact Social Security with documentation of your actual earnings—your tax returns or W-2s—and ask them to correct your record.

If you do not have a my Social Security account yet, you can create one using your email address and Social Security number. Once you are logged in, you can see your complete earnings record and the credits you have earned in each year.

What Happens If You Do Not Have Enough Credits

If you do not have enough work credits to meet the requirement for SSDI, you cannot be approved for that program. 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 is available to disabled people with limited income and resources, regardless of work history.

If you are close to having enough credits—for example, if you are 39 and need 40 credits—you might be able to continue working part-time or in a limited capacity while your SSDI case is being decided. Each credit you earn moves you closer to the threshold. However, if your disability prevents you from working at all, this may not be an option.

Some people who do not have enough credits now may earn additional credits in the future if they return to work. If you recover enough to work again, you can build more credits, and those credits will be added to your record. This means your may be able to access status can change over time.

Frequently Asked Questions

Can I get SSDI if I have only worked part-time?

Yes. Part-time work counts the same as full-time work for credits—what matters is your total earnings, not the number of hours. If you earned enough in part-time work to accumulate the required credits, you can be considered for SSDI. Many people build their 40 credits through a mix of part-time and full-time jobs over their working years.

Do credits expire or go away after a certain time?

Work credits do not expire once you have earned them. They stay on your record permanently. However, the requirement that 20 of your 40 credits be recent (earned in the 10 years before disability) means that very old credits alone will not may have access to you if you have not worked recently.

What if I worked in another country?

Work done outside the United States generally does not count toward Social Security credits unless you were a U.S. citizen or resident alien working for a U.S. employer. Some countries have agreements with the United States that allow work in those countries to count, but this is limited. Contact Social Security if you have worked internationally and are unsure whether it counts.

How do I know what year I became disabled?

Your date of disability is the date you stopped being able to work due to your medical condition. This is not necessarily the date you filed for SSDI or the date you received a diagnosis. Social Security will ask you when you last worked and when your condition made work impossible. Medical records and statements from your doctor help establish this date.

Can I earn credits while receiving SSDI?

Yes. If you work while receiving SSDI, you continue to earn work credits on those earnings. However, there are limits on how much you can earn before your benefits are reduced or stopped. These limits change yearly and are separate from the work credit rules.