You need 40 work credits total, but the timing matters more than you might think

Social Security counts your work history in work credits, not years. You earn one credit for each $1,730 of wages you report to Social Security in 2024 (the amount changes yearly). You can earn a maximum of four credits per year, which means you could theoretically earn 40 credits in 10 years of full-time work — but you could also earn them in 13 years of part-time work, or in 8 years if you earned well above the threshold.

The second rule is the one that trips people up: you must have earned 20 of those 40 credits in the last 10 years. This is called the "recency requirement." It exists because SSDI is meant to protect workers who become disabled while still in the workforce, not someone who stopped working 20 years ago and is now claiming a disability that developed last month.

If you became disabled before age 31, the rules are looser — you only need credits equal to half the time between age 21 and the age you became disabled, with a minimum of six credits. A 26-year-old who became disabled would need only six credits total, for example, because half the time from 21 to 26 is 2.5 years, rounded up.

Key Takeaways

  • You need 40 work credits to may have access to for SSDI, but you earn them based on wages reported, not calendar years — part-time work counts as long as you earn enough.
  • Of your 40 credits, at least 20 must have been earned in the 10 years when ready before you became disabled or applied.
  • If you became disabled before age 31, you need fewer credits — as few as six if you were disabled at 26.
  • Social Security's records of your earnings determine your credits, so check your account at ssa.gov to verify they have your work history correct.

How credits accumulate year by year

Each year, Social Security looks at your total wages and divides by the annual threshold. In 2024, that threshold is $1,730 per credit. If you earned $6,920, you would get four credits that year (the maximum). If you earned $3,460, you would get two credits. If you earned $1,000, you would get zero credits that year because you did not reach the first threshold.

The threshold amount rises most years because it is tied to national wage growth. In 2023, it was $1,640 per credit. In 2022, it was $1,550. This means that a job paying the same dollar amount might earn you four credits one year and three credits another year, depending on whether the threshold went up.

You do not have to work all 12 months to earn four credits in a year. You could work six months at high enough wages and earn four credits, or work all year at lower wages and earn two. Social Security only cares about total wages reported, not when you earned them during the year.

The 10-year recency rule and why it exists

Even if you have 40 credits, you cannot claim SSDI unless at least 20 of them were earned in the 10 years before your disability began. This rule prevents someone from working steadily in their 20s, leaving the workforce entirely, and then claiming a disability 30 years later.

The 10-year window is measured from the date you became disabled, not the date you explore. If you became disabled on March 15, 2024, your 10-year window runs from March 15, 2014 forward. Credits earned before March 15, 2014 do not count toward the 20-credit requirement, even if they are part of your total 40.

This rule is why someone who worked steadily for 15 years, then stopped working for 12 years, might have 40 total credits but still be denied SSDI. If they became disabled in year 27 of their life, they would have only the credits from years 17–27 to count toward the 20-credit requirement — and if they stopped working in year 15, they would have zero credits in the last 10 years.

Younger workers and the reduced credit requirement

If you became disabled before age 31, Social Security uses a different formula. You need credits equal to half the time between age 21 and your disability date, with a floor of six credits minimum.

At age 24, you would need six credits (half of six years, rounded up). At age 26, you still need six credits. At age 28, you would need seven credits (half of seven years). At age 30, you would need nine credits. Once you turn 31, the standard 40-credit rule takes over.

This rule recognizes that younger workers have not had time to accumulate 40 credits through no fault of their own. A 22-year-old who became disabled after working for only one year would need just six credits, not 40, because the law assumes they would have continued working if the disability had not occurred.

What happens if you do not have enough credits

If you do not meet the credit requirement, you are not automatically denied forever. Your situation changes every year as you age and as time passes. If you are 29 and have only 15 credits, you cannot claim SSDI now — but if you work and earn more credits, or if you turn 31 and the standard rule applies, your path may open.

Some people continue working while disabled if they are able to do so, specifically to build credits toward SSDI. Work incentive programs like the Student Earned Income Exclusion and Plan to Achieve Self-Support (PASS) allow you to work and earn without losing benefits once you are already on SSDI, but they do not help you reach SSDI in the first place if you do not have enough credits yet.

If you are close to the credit requirement, it may be worth checking with Social Security about your timeline. A representative can tell you exactly how many credits you have and how many you need, based on your actual earnings record.

Checking your work credit record

Social Security maintains a record of every year you reported wages. You can view this record by creating an account at ssa.gov and accessing your Social Security Statement. The statement shows your earnings year by year and the credits you earned in each year.

Errors in this record are not uncommon, especially if you changed your name, worked under a different name, or had wages reported incorrectly by an employer. If you see missing years or wages that seem wrong, you can request a correction. Social Security has a three-year, three-month, and 15-day window to correct errors, so old mistakes may not be fixable.

If you are explore for SSDI, Social Security will pull your official earnings record as part of the process. But checking it yourself beforehand means you can spot problems and request corrections before your claim is filed, rather than discovering the error after you have been denied.

How part-time and seasonal work counts

There is no requirement that your work be full-time or year-round. A person who worked part-time for 20 years could have 40 credits if they earned enough in each year to reach the threshold. A person who worked seasonally — say, in agriculture or retail — can count those wages toward credits as long as they were reported to Social Security.

Self-employment income counts the same way as wages. If you were self-employed and reported your income on tax returns, Social Security counts it. Unreported cash income does not count, because Social Security has no record of it.

Military service before 1968 can also count as credits under certain conditions, even if no wages were reported. This is a narrow exception, but it matters for some older workers. If you served in the military, mention it when you explore or contact Social Security to ask whether your service adds credits.

Frequently Asked Questions

If I have 40 credits but only 15 are from the last 10 years, can I get SSDI?

No. You need both: 40 credits total and at least 20 of them from the last 10 years. Having 40 credits is necessary but not enough by itself. You must also meet the recency requirement.

Does working part-time while disabled help me build credits toward SSDI?

Only if you are not yet on SSDI. Once you are receiving SSDI, work incentives protect your benefits while you earn, but you cannot use work to build credits retroactively. Credits are earned when you work, not added later.

What if I took time off to raise children — does that count as work credits?

No. Only wages reported to Social Security count. Years out of the workforce do not earn credits, even for caregiving. However, you may be able to receive benefits as a family member on someone else's record if a parent or spouse is receiving SSDI or retirement benefits.

Can I use credits from a job I had 15 years ago if I became disabled last year?

Only if you also have 20 credits from the last 10 years. Credits from 15 years ago count toward your total of 40, but they do not count toward the 20-credit recency requirement. You need recent work history as well.

How do I know exactly how many credits I have?

Log into your account at ssa.gov to view your Social Security Statement, which lists your earnings and credits year by year. You can also call Social Security at 1-800-772-1213 or visit a local office to request a detailed earnings record.