Past Relevant Work: The Old 15-Year Rule Explained

For decades, SSA reviewed the last 15 years of your work history under the past relevant work rule. That changed on June 22, 2024, when a final rule published April 18, 2024 cut the lookback window to 5 years. Today SSA generally ignores work older than that, along with any job that was not substantial gainful activity or did not last long enough for you to learn it.

Many people still describe the rule as a 15-year lookback because it operated that way for so long. If you applied before June 22, 2024, or you are reading older advice, the 15-year version may still shape your expectations. This article explains the current rule, why the change happened, and how SSA sorts each qualifying job into exertional and skill categories.

Why the 15-Year Rule Shrank to 5

The old regulation reasoned that skills fade and industries shift over 15 years. In the 2024 rulemaking, SSA concluded the same logic points to a shorter period, because work older than 5 years is of diminished relevance to the jobs that actually exist now.

The current text of 20 CFR 404.1565(a) says SSA considers your work experience when it was done within the last 5 years, lasted long enough for you to learn it, and was substantial gainful activity. The regulation adds that a gradual change occurs in most jobs, so after 5 years it is no longer realistic to expect that skills and abilities acquired in a job done then continue to apply.

Social Security Ruling 24-2p, titled How We Evaluate Past Work, carries the same 5-year standard into daily practice. The ruling confirms that past relevant work is work done within the past 5 years, and that work started and stopped in fewer than 30 calendar days does not count.

How the Window Is Measured

The 5-year period runs backward from the date SSA decides your claim, which is the date of adjudication. Because decisions often take a long time, a job that was inside the window when you applied can drop out before the decision issues.

If your date last insured came earlier, the window is measured from that date instead. That rule matters most when you file after your insured status has run out, since only work inside the insured period can count against you.

A practical pattern shows why the shorter window helps claimants. A job you left 8 years ago, with lifting demands you can no longer meet, is now outside the analysis entirely. Under the 15-year rule that same job could have supported a denial at Step 4.

Three Gatekeeping Requirements

Under 20 CFR 404.1565(a), a job must clear three gates before SSA can use it against you at Step 4 of the sequential evaluation.

First, the job must fall inside the lookback window. Second, it must have been substantial gainful activity. In 2026 that generally means average monthly earnings above $1,690 for a non-blind applicant, or above $2,830 for a statutorily blind applicant, under the amounts SSA's Office of the Chief Actuary published for 2026. Work below that level, such as an accommodation job with sharply reduced duties, may not count.

Third, the job must have lasted long enough for you to learn it. The 2024 amendments added a bright line for this gate: work that started and stopped in fewer than 30 calendar days does not count as past relevant work. A brief failed attempt to return to work no longer sinks a claim.

How Each Job Is Sorted by Exertion

Once a job qualifies, SSA classifies its physical demands using the exertional definitions at 20 CFR 404.1567.

• Sedentary work involves lifting no more than 10 pounds at a time, occasional walking and standing, and mostly sitting.
• Light work involves lifting up to 20 pounds and frequent lifting or carrying of up to 10 pounds, with a good deal of walking or standing.
• Medium work involves lifting up to 25 pounds frequently and 50 pounds occasionally.
• Heavy and very heavy work involve still greater lifting demands.

The classification that controls is the one that fits the job as you actually performed it, not the job title. At Step 4, SSA can also test the job as it is generally performed in the national economy, as 20 CFR 404.1565(b) and the sequential evaluation rule at 20 CFR 404.1520(e) allow.

How Each Job Is Sorted by Skill

Separately from exertion, every job gets a skill label under 20 CFR 404.1568.

Unskilled work involves little or no judgment and simple duties that can be learned in 30 days or less. Semiskilled work requires some skills but no complex duties. Skilled work requires judgment, specialized knowledge, or supervisory responsibility.

This label matters most one step later. At Step 5, skills from semiskilled or skilled past work can transfer to other jobs, while unskilled work produces no transferable skills. The short lookback therefore shrinks the pool of skills SSA can consider, which tends to favor older claimants under the medical-vocational guidelines.

The Information SSA Collects

When SSA needs your work history, 20 CFR 404.1565(b) lists exactly what it asks for: the dates you worked, all of the duties you did, and any tools, machinery, and equipment you used. You also need to describe the amount of walking, standing, sitting, lifting, and carrying in your workday, along with the other physical and mental demands of the job.

If you cannot supply everything, SSA may try, with your permission, to get the details from your employer, a family member, or a co-worker who knows the work. Vague answers hurt here. POMS DI 25005.020 directs adjudicators to compare past work demands against your residual functional capacity function by function, and to go back for more detail when the description is incomplete or internally inconsistent.

Special schedules get their own treatment under that POMS section. If your recent work was part-time, mandatory overtime, or an alternative schedule such as four 10-hour days, SSA evaluates those jobs as you actually performed them, which takes fuller descriptions than a standard Monday-through-Friday job.

The Arduous Work Exception

One older provision survived the 2024 rewrite. If all of your work in the past 5 years was arduous and unskilled, and you have very little education, SSA will ask about all of your work from the time you first began working. As 20 CFR 404.1565(b) explains, that information could help you get disability benefits, because decades of arduous unskilled labor weigh in favor of a finding that you cannot adjust to other work.

Frequently Asked Questions

Does SSA still look back 15 years for past relevant work?

No. Since the final rule published April 18, 2024, which took effect June 22, 2024, SSA generally considers only work from the 5 years before it decides your claim, or before your date last insured if that came earlier.

Why does SSA ignore work older than the lookback window?

The regulation at 20 CFR 404.1565(a) explains that jobs change gradually, so after 5 years it is no longer realistic to expect that skills and abilities acquired in an old job still apply.

Does a job I held for only a few weeks count?

Generally no. Work that started and stopped in fewer than 30 calendar days is excluded under 20 CFR 404.1565(a), and the job must also have lasted long enough for you to learn it.

This article is general information about SSDI eligibility rules, not legal advice. Program rules and work-history criteria change over time, and the lookback period described here reflects the rule in effect in 2026. Consult a qualified representative or contact SSA directly for guidance on your specific claim.