What Are SSDI Work Credits?
Social Security work credits (sometimes called "quarters of coverage") are the unit SSA uses to measure your work history. You earn credits by paying Social Security taxes (FICA) on your wages or self-employment income. Think of them as proof that you participated in the Social Security system — and therefore earned the right to claim disability benefits.
Credits are important for two programs in different ways:
- SSDI (Social Security Disability Insurance): Requires a minimum number of credits — both in total and earned recently — before your claim can be approved based on work history.
- SSI (Supplemental Security Income): Has no work credit requirement. SSI is purely need-based and available to disabled individuals regardless of work history.
How Work Credits Are Earned
In 2026, you earn one Social Security work credit for every $1,810 in wages or net self-employment income. The maximum is 4 credits per year, reached when your annual earnings hit $7,240 or more. The dollar threshold is adjusted slightly each year for wage growth.
Historical context: The credit amount has increased over the years — it was $1,640 in 2023 and $1,510 in 2022. Credits earned in prior years at those lower thresholds still count. What matters is the threshold in effect when you actually earned the income, not today's rate.
Part-Time and Seasonal Workers
Credits are calculated annually — not quarterly, despite the old name "quarters of coverage." This means part-time or seasonal workers can still earn full annual credits. If you work part-time but earn $7,240 or more in a calendar year, you receive all 4 credits for that year.
Self-Employed Workers
Self-employed individuals earn credits based on net self-employment income (after business deductions) reported on Schedule SE of your federal tax return. You must pay both the employee and employer portions of Social Security tax (15.3% on net earnings, though you deduct half on your return). If you underreport self-employment income or fail to file Schedule SE, you won't get credit for that work — which can affect both your SSDI eligibility and your eventual benefit amount. For details, see our guide for self-employed SSDI applicants.
How Many Work Credits Do You Need?
The number of credits required depends on your age when you become disabled. The older you are, the more credits SSA expects you to have accumulated. There are two tests you must pass:
- Duration of Work Test: Have you worked long enough overall? (Total credits based on age)
- Recent Work Test: Have you worked recently enough? (Usually: 20 credits in the last 10 years — 5 of the last 10 years working)
Total Credits Required by Age (Age 31+)
| Age at Disability Onset | Credits Required (Total) | Years of Work Needed |
|---|---|---|
| 31 – 42 | 20 | 5 years |
| 44 | 22 | 5.5 years |
| 46 | 24 | 6 years |
| 48 | 26 | 6.5 years |
| 50 | 28 | 7 years |
| 52 | 30 | 7.5 years |
| 54 | 32 | 8 years |
| 56 | 34 | 8.5 years |
| 58 | 36 | 9 years |
| 60 | 38 | 9.5 years |
| 62 or older | 40 | 10 years |
Remember the recent work test: For workers 31 and older, you must have earned 20 of the required credits in the 10 years immediately before your disability onset date — regardless of how many total credits you have accumulated. Having 40 lifetime credits doesn't help if you stopped working 8 years ago.
Date Last Insured (DLI): Your SSDI Coverage Expiration Date
Your Date Last Insured (DLI) is the date through which you have sufficient work credits to be insured for SSDI. Think of it like an expiration date on an insurance policy — you must have become disabled before your DLI for your claim to be considered.
Why the DLI Matters
If your disability began after your DLI, SSA will deny your claim on non-medical grounds — not because your medical condition isn't disabling, but because your insurance lapsed. This is one of the most common reasons SSDI claims fail on technical grounds.
If you stopped working several years before applying, check your DLI immediately. In many cases, you may need to establish an onset date before your DLI, which requires thorough medical documentation from that period.
Learn more: SSDI Insured Status & Date Last Insured Explained →
How to Calculate Your DLI
Your DLI is calculated from the date you last had sufficient credits, projected forward. Generally for workers over 31, you maintain insured status for 5 years after you stop working (since you need 20 credits in the last 10 years, and the "window" slides). Your SSA.gov account statement shows your DLI directly.
How to Check Your Work Credits
The easiest way to check your credits and DLI is through your online Social Security account:
- Go to SSA.gov/myaccount and sign in or create an account
- Click on "View my Social Security Statement"
- Review the Earnings Record tab — this shows wages reported for each year
- Look for your estimated SSDI benefit and your work credit status
- Verify the earnings record — if any years show $0 or incorrect amounts, contact SSA with documentation to correct the record
Errors are common: Missing wages are more common than people realize, especially for older workers or those who changed employers frequently. Correcting earnings record errors can both fix insured status problems and increase your eventual benefit amount.
Special Rules for Certain Groups
Statutorily Blind Workers
Workers who meet SSA's definition of statutory blindness (visual acuity 20/200 or worse in the better eye with corrective lenses, or visual field of 20 degrees or less) only need to meet the duration of work test — the recent work test does not apply. This means a blind worker with 40 lifetime credits qualifies even if they haven't worked in many years.
Disabled Widow(er)s
If you are disabled and were married to a Social Security-covered worker who died, you may qualify for Disabled Widow(er)'s Benefits (DWB) based on your deceased spouse's work record — not your own. You must be age 50–59 and become disabled within 7 years of your spouse's death (or within 7 years of when you stopped receiving survivor benefits for caring for their child).
SSI: No Work Credits Required
If you do not have enough work credits for SSDI — or if your SSDI benefit would be very small — you may be better served by SSI (Supplemental Security Income):
- No work history required — SSI is available to disabled individuals regardless of employment history
- Based on financial need: limited income and assets required ($2,000 individual / $3,000 couple asset limit)
- Monthly payment based on the Federal Benefit Rate ($967/month in 2026) minus countable income
- Medicaid coverage is typically immediate (rather than a 24-month Medicare wait)
- You can apply for both SSDI and SSI simultaneously — SSA evaluates both
For a detailed comparison, see our SSDI vs. SSI guide.