What Is Your Date Last Insured (DLI) for SSDI?

Your date last insured is the last day on which you are still covered by SSDI’s insurance. To qualify, your disability must have begun on or before that date. It is not a deadline to apply and not the date your benefits stop: you can apply years later and still be approved if the evidence shows you were disabled while you were insured, and once you are approved, benefits continue long after the date passes.

The DLI is always the last day of a calendar quarter: March 31, June 30, September 30 or December 31. It is the last quarter in which you meet the recent work test, which for most people 31 and older means having 20 work credits in the 40 quarters ending with that quarter. For someone who worked steadily and then stopped, it usually falls about five years after their last full year of work.

Why the DLI decides some claims

SSDI is insurance you earn by working, and like other insurance it covers events that happen while the policy is in force. Social Security cannot set your disability onset after your date last insured. If the state agency finds that you are disabled now but cannot find that your condition was disabling on or before your DLI, the claim is denied, no matter how severe your condition is today.

This is why people who stop working for reasons other than disability, such as caregiving, early retirement or a layoff, and then develop a serious condition years later, are sometimes found disabled but not insured. It is also why delays hurt. Someone who stopped working in 2016 but did not apply until 2023 can still qualify, but only by proving their disability began before their DLI, using records that may be years old. And because SSDI pays back pay for at most 12 months before the application, the months between onset and that limit are lost even when the claim succeeds.

Two groups are treated differently. People who are statutorily blind need only be fully insured, not meet the recent work test, so their DLI for blindness can be much later than their DLI for other disabilities. And SSI has no insured status at all, so a person whose DLI has passed can still qualify for SSI if their income and savings are low enough.

How your DLI is set

The field office computes your DLI from your earnings record using its own insured status tools, before the medical decision is made, and passes it to the state disability agency. The calculation follows the work credit rules by age: 20 credits in the last 40 quarters at 31 and older, a shorter half-the-time rule under 31, and full insured status alone for blindness.

A few rules change the date in ways people do not expect:

• You can have more than one DLI. Someone with a stop-and-start work history can have several separate periods of insured status, each with its own last date, and a person with a visual impairment can have one DLI for blindness and another for disability.
• Time on disability does not count against you. If you had an earlier period of disability, those quarters are left out of the 40-quarter window, which can push a later DLI further out.
• Late-reported earnings count once they are on your record. The field office has to consider earnings from the most recent year that may not have posted yet, so your latest job can still move the date.

How to find your date last insured

Your Social Security Statement shows your earnings by year, but not your DLI. To learn the exact date, call Social Security at 1-800-772-1213 or ask your local office; if you have already applied, it appears in your claim file and often in the decision notice. You can also estimate it yourself: find the last year in which you had four credits ($7,560 of earnings in 2026 and $7,880 in 2027, less in earlier years), count back to make sure you had 20 credits in the 10 years ending then, and the date will usually be about five years after the end of your run of steady work.

Check your earnings record at the same time. A year missing from your record means missing credits, which can move your DLI years earlier. Earnings from contract or freelance work count only if they were reported on a tax return with self-employment tax, and corrections are ordinarily allowed only within 3 years, 3 months and 15 days after the end of the year in question, with exceptions such as earnings shown on tax returns you filed or wages an employer reported that never reached your record. You can request a correction through your my Social Security account or by phone, with W-2s, pay stubs or tax returns as proof.

If your DLI has already passed

You can still apply. The question becomes whether the evidence shows your disability began on or before your DLI. Social Security’s onset ruling, SSR 18-1p, sets out how that is decided, and it gives claimants more room than many expect.

For conditions that develop or worsen over time, Social Security looks at the nature of the impairment, the severity of signs and symptoms, your treatment history, and your own statements about when things got worse. The onset it finds can be earlier than your earliest medical record, as long as it is supported by the evidence and consistent with how the condition progresses. If records from the period may exist, Social Security will help obtain them. If they were never created or have been destroyed, it can consider statements from family members, friends and former employers who saw your limitations before the DLI.

Records from after your DLI also matter. They are needed to show your condition lasted at least 12 months, and they can help establish an earlier onset when a later diagnosis explains symptoms documented before the DLI, such as a progressive disease confirmed after years of recorded complaints. At a hearing, the judge may ask a medical expert to infer when you became disabled, although you cannot require the judge to do so.

Watch out: If you are denied, appeal instead of filing a new application. A new application starts a new 12-month back pay window, and as years pass you may need to prove an onset that is further and further in the past. Appeals keep your original application date alive.

Closed periods and recovery

If you were disabled for at least 12 months but have since recovered or returned to work, you may still be owed benefits for a closed period. You must apply while disabled or within 12 months after your disability ended, or within 36 months if your condition kept you from applying sooner. A period of disability, even a closed one, also freezes your earnings record so those months do not lower your future retirement or disability benefit.

After you are approved

Once you are entitled to SSDI, your date last insured no longer limits your benefits. An award letter that mentions a DLI, even a future one, is simply recording the insured period the decision relied on. Your benefits continue as long as you remain disabled, subject to continuing disability reviews, and convert to retirement benefits at full retirement age.

If Social Security set your onset later than you claimed, which shortens back pay, you can appeal the onset date within 60 days even though the claim was approved. Choosing a well-supported onset date when you apply avoids most of these disputes.