The Basic Number: 40 Credits, With a Catch

You need 40 work credits total to receive SSDI, but there is an important condition: you must have earned at least 20 of those credits in the 10 years before you became disabled. This means you cannot straightforward accumulate 40 credits over your entire working life and then stop working — the credits have to be recent enough to show you were actively working when your disability began.

If you became disabled before age 31, the rules are different and more lenient. Social Security uses a separate calculation for younger workers that requires fewer credits overall. The exact number depends on your age at the time you became disabled, but the principle is the same: you need some credits from the years when ready before your disability started.

Key Takeaways

  • Most people need 40 work credits total, with at least 20 earned in the 10 years before they became disabled.
  • You earn one credit for every $1,550 of wages you earn in a year (the dollar amount changes annually, so the exact figure varies by year).
  • You can earn a maximum of four credits per year, regardless of how much you earn.
  • If you became disabled before age 31, you may need fewer credits — Social Security calculates this based on your specific age at disability.
  • Your Social Security Statement shows exactly how many credits you have earned so far.

How Credits Are Earned: The Dollar Threshold

You earn work credits by earning wages or self-employment income. In 2024, you earn one credit for every $1,550 you earn in a year. This dollar amount increases slightly most years to keep pace with average wage growth, so the threshold will be different in 2025 and beyond.

The key point is that you cannot earn more than four credits in a single year, even if you earn far more than $6,200 (which is four times $1,550). If you earn $1,550, you get one credit. If you earn $3,100, you get two credits. If you earn $6,200 or more, you get four credits — and that is the maximum for that year. You cannot bank extra credits from a high-earning year to use later.

Self-employment income counts the same way as wages. If you own a business, Social Security counts your net self-employment income (after business expenses) toward your credits.

The 10-Year Recency Rule: Why Timing Matters

Having 40 credits is not enough by itself. Social Security also requires that you earned at least 20 of those 40 credits in the 10-year period when ready before you became disabled. This rule exists to may support that SSDI supports people who were recently in the workforce, not people who worked decades ago and have been out of work for many years.

The 10-year window is measured backward from the date your disability began, not from the date you file for SSDI. If you became disabled in March 2024, Social Security looks back to March 2014 and counts how many credits you earned between March 2014 and March 2024. You need at least 20 credits in that window.

This is why someone with 40 credits can still be denied SSDI: if most of those credits were earned more than 10 years ago, they do not meet the recency requirement. You need both conditions — 40 total credits and 20 recent credits — to satisfy the work history requirement.

Special Rules for Workers Under 31

If you became disabled before turning 31, Social Security uses a more flexible formula. You do not automatically need 40 credits. Instead, the number of credits you need depends on your exact age when the disability began.

Generally, younger workers need fewer total credits and a smaller proportion of recent credits. For example, someone who became disabled at age 24 might need only 12 credits, with 8 of them earned in the 6 years before disability. Someone who became disabled at age 28 might need 28 credits, with 16 earned in the 8 years before disability. The exact numbers shift based on your age at the time disability started.

If you became disabled before age 22 and have worked at all, you may have enough credits already. The best way to know is to check your Social Security Statement or contact Social Security directly with your birth date and the date your disability began.

Checking Your Own Credit Count

You can see exactly how many credits you have earned by reviewing your Social Security Statement. You can create a free account at ssa.gov and view your statement online, which shows your earnings history year by year and your total credit count.

Your statement also shows which years Social Security has a record of your earnings. If you see a year missing or an amount that looks wrong, you can request a correction. Social Security keeps records for a limited time, so if you earned wages many years ago and the record is missing, you may be able to provide old tax returns or W-2 forms as proof.

If you do not have online access or prefer to work by phone, you can call Social Security at 1-800-772-1213 and ask them to review your credit count with you. They can tell you whether you have enough credits to potentially receive SSDI based on your work history.

What Happens If You Do Not Have Enough Credits

If you do not have 40 credits, or if you do not have 20 credits in the required 10-year window, you cannot receive SSDI based on your own work record. However, this does not mean you have no options.

You may be able to receive benefits as a family member on someone else's record — for example, as a disabled adult child of a retired or disabled worker, or as a spouse. The work history requirement applies to the person whose record you are using, not to you. If your parent or spouse has enough credits, you may still be able to receive benefits.

You might also be able to receive Supplemental Security Income (SSI), which is a separate program that does not require work credits. SSI is based on financial need rather than work history. The disability standard is the same — you must have a severe impairment that prevents substantial work — but there is no work credit requirement.

Frequently Asked Questions

Do credits expire if I stop working?

No, credits do not expire. Once you earn a credit, it stays on your record permanently. However, the recency rule means that if you stop working, the older credits gradually move outside the 10-year window. You can still use them to reach 40 total, but you need to have earned 20 of your 40 credits within the 10 years before disability.

Can I earn credits while receiving SSDI?

Yes. If you work while receiving SSDI, you continue to earn credits. However, there are work incentive rules that may affect your benefits if you earn above certain amounts. Contact Social Security to understand how work will affect your specific situation.

What if I worked in another country?

Work performed outside the United States generally does not count toward SSDI credits, with some exceptions for U.S. citizens and certain visa holders. If you have worked abroad, contact Social Security with details about your employment to find out whether those years can count.

How do I know what year my disability started?

Your disability onset date is the date your condition became severe enough that you could no longer work. This is not necessarily the date you filed for SSDI or the date you were diagnosed. Social Security determines this date during the review of your case, and it may be different from what you initially report.

Can I get credits for volunteer work or unpaid caregiving?

No. Credits are earned only through paid wages or self-employment income. Volunteer work, caregiving for family members, and other unpaid work do not generate credits, even if the work is substantial and valuable.