Past Work: As You Did It vs. How It's Usually Done

At step 4 of the SSDI sequential evaluation, SSA compares your residual functional capacity with the demands of your old jobs, and it runs that comparison two different ways. Under 20 CFR 404.1560 and SSA Ruling SSR 24-2p, effective June 22, 2024, SSA must weigh the job as you actually performed it and the same job as it is generally performed in the national economy. If you can still do either version, SSA will usually find you not disabled at this step.

What step 4 is asking

Step 4 asks one question: can you still do any job you held in the past? The rule at 20 CFR 404.1520(f) places this step after SSA decides your impairments are severe and measures your residual functional capacity, called RFC. RFC is the most you can still do in a workday despite your physical and mental limits.

If SSA finds you can do past relevant work, the sequential evaluation stops and the claim is denied at step 4. If you cannot do any past relevant job, the evaluation moves on to step 5, where SSA must decide whether other work exists that you could adjust to.

Past relevant work has a definition of its own at 20 CFR 404.1565. It means work you performed at the substantial gainful activity level, for long enough to learn it, inside the relevant window. SSA shortened that window in a final rule published on April 18, 2024: it now runs back 5 years from the date SSA decides your claim, or from your date last insured when that date has already passed. Jobs that started and stopped in fewer than 30 calendar days do not count.

The first comparison: the job as you actually did it

SSR 24-2p directs adjudicators to consider the particular functional demands peculiar to the work you actually did, because people often perform a job differently from the official description. You may have been given special equipment, assigned fewer tasks, or watched over more closely than the norm for that occupation.

SSA gathers your version of the job mostly from you. SSR 24-2p calls you the primary source for your work history and says your statements are generally enough to establish the skill level and demands of each job. The main written source is Form SSA-3369, the Work History Report, which asks about lifting, standing, sitting, walking, tools, pace, and supervision for each job you list, and your testimony at a hearing fills in the rest.

This half of the comparison cuts both ways. If you ran the job lighter than the standard description, SSA must test whether you can do your lighter version. If you loaded the job with extra duties beyond the norm, that heavier version is the one you have to show you cannot do.

The second comparison: the job as generally performed

SSA also asks whether you can do the occupation as it is normally done across the country. For this half, SSA relies on published occupational data and on vocational expert testimony, as described in SSR 24-2p.

The classic printed source is the Dictionary of Occupational Titles, or DOT, which the Department of Labor last revised in 1991. SSA also uses the Department of Labor's O*NET database, which is kept current, along with the Bureau of Labor Statistics Occupational Requirements Survey. At hearings, administrative law judges question vocational experts about job demands.

When a vocational expert's testimony conflicts with the DOT, the adjudicator must ask about the conflict and get a reasonable explanation before relying on the testimony. That requirement comes from SSR 00-4p.

Why the two versions of one job can look different

Job titles are messy. A person whose title was cashier but who spent most of every shift unloading delivery trucks did a much heavier job than the title suggests. The opposite happens too, when a lofty title covers a desk job with almost no supervisory duties.

Employers also adjust jobs for particular workers. Someone with back trouble might have been moved to a seated station, or excused from the lifting rotation, years before any disability claim existed. Under 20 CFR 404.1560(b), those real-world adjustments are part of the step 4 comparison.

The gap between the two versions is where many step 4 disputes live. A person may honestly be unable to meet the national norm for an occupation while still being able to do the easier version they actually performed. SSR 24-2p states the result directly: if you cannot meet the demands of the job as you actually performed it, but you can meet the demands as generally required throughout the economy, SSA finds you able to perform past work and not disabled.

What your statement is worth, and what a denial must show

You are the primary source for your work history, and under SSR 24-2p your statements are generally sufficient to establish the skill level and the physical and mental demands of each past job. If you cannot supply everything SSA needs, the agency may, with your permission, ask your employer or someone else who knows your work, such as a family member or co-worker.

When SSA denies a claim at step 4 based on the ability to do past work, SSR 24-2p requires the denial to do four things: establish your residual functional capacity, identify the past work you can do, consider the demands of that job either as you performed it or as it is generally performed, and explain why your capacity meets those demands. A denial that skips one of those steps has not built the record the ruling calls for.

At a hearing, a vocational expert may supply information about how an occupation is generally performed, as SSR 24-2p allows. The expert usually answers hypothetical questions describing a person with certain limits. Those questions should reflect all of your credibly supported limitations, physical and mental. If a question leaves out a real limit, the answer may not match your situation, and that is worth pointing out in the record.

Describing past work so the record holds up

Details decide these comparisons, and vague answers create problems. For each job, give the heaviest weight you lifted and the weight you lifted frequently, roughly how long you sat, stood, and walked in a day, the tools and machines you used, any production pace or quota, and how closely you were supervised.

Be consistent. The Work History Report you file early usually reappears at the hearing, and unexplained contradictions can undercut an otherwise solid description. If your memory of a job improves later, explain why, such as finding old pay stubs or a written job description.

Keep your dates straight. SSA checks the length of jobs against earnings records, and duration matters more than it used to, because the 2024 rule counts only jobs inside the 5-year window and drops jobs that started and stopped in fewer than 30 calendar days. A job that seems to fall inside the window on paper but cannot be documented may drop out entirely.

Frequently asked questions

Does SSA look at how I personally did my old job, or at the official job description?

Both. Under 20 CFR 404.1560 and SSR 24-2p, SSA must consider past relevant work as you actually performed it and as that occupation is generally performed in the national economy.

If I can do the job as generally performed but not as I did it, do I pass step 4?

No. If you can do either version of the job, SSA can find you not disabled at step 4. The evaluation moves forward only when both comparisons show you cannot do the work.

How does SSA find out how I actually did the job?

Mostly from you. SSA collects the details on Form SSA-3369, the Work History Report, and an administrative law judge may ask a vocational expert about your description at the hearing.

This article is general information about how SSA evaluates past work, not legal advice. Rules change over time, and how they apply depends on the facts of your own claim. Talk with a qualified representative about your situation.