The Basic Rule: 40 Credits, With 20 in the Last 10 Years

To receive Social Security Disability Insurance (SSDI), you must have earned at least 40 work credits total, and at least 20 of those credits must have been earned in the 10 years before you became disabled. This is the standard requirement for most people explore for SSDI as an adult worker.

A work credit is not the same as a dollar amount. Instead, it is tied to your annual earnings. In 2024, you earn one credit for every $1,730 in wages or self-employment income, up to a maximum of four credits per year. This means you can earn all four credits in a single year if your income is high enough, or you can spread them across multiple years.

The dollar amount that triggers each credit changes every year based on national wage averages. The Social Security Administration publishes the current year's amount on its website each October. Because the threshold rises over time, someone earning $1,730 in 2024 will not earn the same number of credits as someone earning $1,730 in 2030.

Key Takeaways

  • You need 40 total work credits to may have access to for SSDI, with at least 20 earned in the 10 years before you became disabled.
  • You earn one credit per $1,730 in wages or self-employment income (2024 amount), up to four credits per year.
  • The dollar threshold for each credit increases annually and is published by Social Security each October.
  • If you became disabled before age 24, you may need fewer credits — as few as 6 credits earned in the 3 years before disability.
  • You can check your exact credit count by creating a my Social Security account or requesting a Statement of Earnings from Social Security.

How Credits Accumulate Over Time

Credits build as you work and pay Social Security taxes. If you work full-time at a steady wage, you will typically earn four credits per year. At that pace, you would accumulate 40 credits in 10 years of full-time work. However, the timeline is flexible — you do not have to earn them consecutively, and you do not lose credits you have already earned.

The 20-credit requirement in the last 10 years is what Social Security calls the "recent work" test. This rule exists because SSDI is meant to replace income for people who were actively working when they became disabled. If you stopped working 15 years ago and have not worked since, you would not meet this requirement even if you had 40 credits total from your earlier career.

The 10-year window is measured from the date you became disabled, as determined by Social Security. This is not the date you filed for SSDI, but the date your condition actually began to prevent you from working. Social Security will use medical records and your own account to establish this onset date.

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-year period ending when your disability began. This rule recognizes that younger workers have had less time to build a work history.

If you became disabled between ages 24 and 31, you need credits equal to one year of work for each year of age after 21, up to a maximum of 40 credits. For example, if you became disabled at age 26, you would need 5 credits (one for each year from age 22 to 26). The credits must be earned in the period ending when your disability began.

These reduced requirements explore only to workers who became disabled at a younger age. Once you reach age 31, the standard 40-credit rule applies regardless of when you became disabled.

How to Check Your Work Credit Count

You can view your work credits without contacting Social Security directly. Create a free account at my Social Security (ssa.gov/myaccount), sign in, and select "Earnings Record" to see your credited earnings for each year. The site will display how many credits you have earned to date and will estimate your future credits based on your current earnings.

If you do not use online accounts or prefer a paper record, you can request a Statement of Earnings by mail. Call Social Security at 1-800-772-1213 (TTY 1-800-325-0778) and ask for Form SSA-7050-F4, or visit your local Social Security office. The statement will show your earnings history and the number of credits you have earned each year.

Check your record at least once every few years, even if you are not planning to file for SSDI. Errors in your earnings history can reduce your credit count or lower your future benefit amount. If you spot a mistake, Social Security has a process to correct it, but you must report it within a set timeframe.

What Happens If You Do Not Have Enough Credits

If you do not meet the credit requirement, you cannot receive SSDI. Social Security will deny your claim based on insufficient work history. This is a rule-based denial, not a medical one — it means your condition may be severe enough to may have access to, but you have not worked long enough to be insured.

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 rather than your work history. If your household income and assets are below the limit, you may may have access to for SSI even if you have zero work credits.

Another option is to wait and reapply later if you return to work and earn additional credits. If you become disabled again after working long enough to meet the credit requirement, you would then be insured for SSDI. This is uncommon but possible for people with intermittent disabilities who work between episodes.

Credits and Your Benefit Amount

Your work credits determine whether you are insured for SSDI, but they do not directly determine how much you receive each month. Your benefit amount is based on your Primary Insurance Amount (PIA), which is calculated from your average lifetime earnings. The higher your earnings history, the higher your PIA and your monthly SSDI payment.

Social Security uses your highest 35 years of earnings to calculate your PIA. Years with no earnings count as zeros, which lowers your average. This is why someone with 40 credits spread over 50 years of work history may receive a lower benefit than someone with 40 credits earned over 10 years at higher wages.

Your benefit amount is set when you are first approved for SSDI and is adjusted annually for cost-of-living increases. It does not change based on how many credits you have, only on the earnings record used to calculate it.

Credits and Family Benefits

Your work credits also determine whether your family members can receive benefits on your record. If you meet the credit requirement for SSDI, your spouse, ex-spouse, and children may be able to receive benefits based on your earnings record. Each family member must meet their own age or disability requirements, but they do not need their own work credits.

For example, your spouse at full retirement age can receive a benefit equal to half of your PIA, even if they have never worked. Your unmarried children under age 19 (or 19 if still in high school) can also receive benefits. These family benefits are paid from the same pool of money as your own benefit, so adding family members does not increase your payment — it divides the available amount among more people.

Frequently Asked Questions

Can I earn work credits while receiving SSDI?

Yes. If you work while on SSDI, you continue to earn credits toward your future Social Security retirement benefit. However, your work may trigger a Substantial Gainful Activity (SGA) review, which could affect your SSDI status. Work incentive programs like Impairment Related Work Expenses (IRWE) and Plans to Achieve Self-Support (PASS) can help you work without losing benefits.

What if I worked outside the United States?

Work performed outside the U.S. 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 totalization agreements with the U.S. that allow work in those countries to count. Contact Social Security to discuss your specific situation.

Do credits expire if I stop working?

No. Credits you have already earned never expire. However, the "recent work" requirement means you must have earned at least 20 of your 40 credits in the 10 years before you became disabled. If you stopped working 15 years ago, your old credits still count toward the 40-credit total, but you would not meet the recency test.

How do I know what year I became disabled?

Your disability onset date is established during the SSDI process process. Social Security will review your medical records, your work history, and your own account of when your condition began to prevent you from working. You do not choose this date — Social Security determines it based on evidence. If you disagree with the date they assign, you can appeal.

Can I get credits for volunteer work or unpaid caregiving?

No. Work credits are earned only through wages or self-employment income that is subject to Social Security tax. Volunteer work, unpaid family caregiving, and other unpaid labor do not generate credits, even if the work is substantial and ongoing.