The five-step sequential evaluation

Here is the fear almost no one says out loud: the disability decision is a black box. You send in the forms, you wait months, and one day a letter says approved or denied — and it can feel like the answer came from behind a curtain, decided by someone who never met you, for reasons no one will explain. If you were denied, you might never know *why*. If you were approved, you might not trust that it will hold.

So let's take the curtain down. There is no curtain. Behind it is a flowchart — five specific questions, asked in a fixed order, written into federal regulation (20 CFR 404.1520). The examiner at Disability Determination Services (the state agency that decides the medical part — *Lesson 60*) doesn't improvise. They start at Question 1 and move down, and the first question that gives a final answer ends the process. That's it. That's the whole decision.

One promise, kept throughout: this lesson explains the flowchart and shows where claims turn — it never predicts an outcome. We'll walk Terrence Boyd, our lead through the SSDI journey — 45, a former forklift operator in Macon, Georgia, with degenerative disc disease and neuropathy, who stopped work in January 2026 — through every step. Not to guess his answer. To show you the map, using a real path across it.

The word that does the work is sequential. The five questions aren't a checklist scored all at once — they're run in order, and each one has only three possible exits: it can allow the claim (you're found disabled, stop), deny it (you're found not disabled, stop), or send it on to the next question. Because it stops at the first question that decides, a claim can be settled at Step 1 and never touch the medicine, or travel all the way to Step 5 before anyone weighs whether you can work.

Read the chart top to bottom and notice the asymmetry. Only two of the five steps can *end* in an approval — Step 3 (you meet a Listing) and Step 5 (you can't adjust to other work). Every other “yes/no” either denies or moves you along. That shape is the single most useful thing to hold in your head: most claims are not clear Listing matches, so most claims travel the full distance to Step 5 — which is why Step 5 is where the real fight happens.

Terrence's path, traced in amber on the chart, is a good teaching case precisely because it doesn't end early. He clears Step 1, clears Step 2, isn't a clear Listing at Step 3, can't return to his old work at Step 4 — and lands at Step 5, the contested one. We'll take the steps one at a time now, and meet him at each.

The very first question isn't medical at all — it's about work. SSA asks: are you doing Substantial Gainful Activity (SGA)? SGA is a monthly-earnings line; earn above it and, at Step 1, SSA generally finds you not disabled — full stop, no matter what your medical records say. The logic is blunt but consistent: the program insures against the *inability* to do substantial work, so if you're already doing it, the inquiry ends here.

Two cautions, both taught in full at Lesson 62. First, SGA is about substantial work, not just any dollar — a little part-time income below the line doesn't automatically sink you here. Second, the number resets most Januarys; the $1,690 and $2,830 figures are the 2026 values. Don't carry an old number into a new year.

Step 2 is the severity screen. It asks whether you have a medically determinable impairment — a condition shown by medical evidence (imaging, lab results, clinical findings), not by symptoms alone — that is “severe,” meaning it significantly limits your ability to do basic work activities, and that meets the duration requirement: it has lasted, or is expected to last, at least 12 months (or to end in death). Miss any piece — not medically documented, only a mild limitation, or short-term — and the finding is not disabled, right here.

This is the same definition of disability you met in *Lesson 57*, now doing a specific job in the sequence. Step 2 is deliberately a low bar to clear but a real one — it screens out claims with no documented, lasting, work-limiting condition, so the heavier analysis at Steps 3–5 is reserved for impairments that are genuinely serious. The evidence that clears it is the work of *Lesson 59* (the application and medical records).

Step 3 is the one place a claim can be won outright, early, on the medicine alone. SSA keeps a catalog of impairments considered severe enough to be disabling on their own — officially the Listing of Impairments, universally nicknamed the “Blue Book.” Each Listing spells out exact medical criteria for a condition. If your impairment meets or equals a Listing and meets the 12-month duration, you're found disabled right here — and SSA never even looks at your work history.

Because a Step-3 allowance is the fastest, cleanest win, it's also where the fast-track programs live — Compassionate Allowances flag conditions so clearly disabling that a claim can be allowed quickly (the terminal-illness and severe-condition fast track is *Lesson 64*). But here's the honest part: most impairments don't meet a Listing. The criteria are strict by design, and the majority of real, disabling conditions fall just short of them. When that happens, the claim doesn't end — it continues to Step 4.

That card is worth pausing on, because it names the two completely different ways the same word — “disabled” — gets reached. Step 3 is a decision about your body's medicine. Step 5, at the far end, is a decision about the work you can still do. They sit at opposite ends of the sequence, weigh different evidence, and even put the burden of proof on different parties. Hold that contrast; we're about to build toward the second door.

Before Steps 4 and 5 can ask their questions, SSA has to settle one finding that both of them lean on: your Residual Functional Capacity, or RFC. The definition is refreshingly plain, and it's worth memorizing in SSA's own words — it's “the most you can still do despite your limitations.” Steps 1–3 asked *how sick are you.* Steps 4–5 ask *what can you still do for work* — and RFC is that answer.

RFC is built from all the evidence, not just a diagnosis: your physical capacity (how much you can sit, stand, walk, lift, and carry across a full workday, repeated day after day), your mental capacity (concentrating, keeping pace, following instructions, getting along with others), and other limits (vision, hearing, and hazards you must avoid). SSA usually summarizes all of that as a work level on an exertional ladder — sedentary, light, medium, heavy, very heavy — plus any non-exertional restrictions.

One RFC finding, two uses. At Step 4, SSA compares it to the work you used to do. At Step 5, it combines with your age, education, and skills. That's why RFC is the hinge of the whole back half of the sequence: get the RFC right, and Steps 4 and 5 follow from it. *(Illustratively,* Terrence's old forklift and warehouse work sat at the medium-to-heavy end — so a reduced RFC can close the door back to it. The full mechanics of RFC and the grids are *Lesson 63.*)

Step 4 takes your RFC and holds it up against your past relevant work. The question: could you still do a job you actually did before? If yes, you're found not disabled — the reasoning being that if a real, prior job is still within your capacity, you can support yourself with it. If no, the claim continues to Step 5.

“Past relevant work” has a precise meaning, and one piece of it changed recently — worth getting right. It's work you've done within the past 5 years, that was substantial gainful activity, and that lasted long enough for you to learn to do it. *(SSA shortened the look-back from 15 years to 5 years for claims filed on or after June 22, 2024, and now ignores jobs that lasted under 30 days — the same current rule you met in Lesson 59.)* A job you last did six years ago, or a two-week job you never really learned, generally isn't counted.

Step 5 is the end of the road, and the most contested step in the entire process. The question widens from *your* past jobs to the whole economy: given your RFC plus your age, education, and work experience, can you adjust to any other work that exists in significant numbers in the national economy? If yes, you're found not disabled. If no — there's no such work you can realistically do — you're found disabled.

How does SSA decide it? Largely with the medical-vocational guidelines — the “grids.” The grids are tables that take your RFC level (sedentary, light, and so on), your age bracket, your education, and whether your prior skills transfer, and read out a directed conclusion of “disabled” or “not disabled.” The grids are their own lesson — *Lesson 63* — but the headline is that age is pivotal: the rules generally expect more adaptability from younger workers and less from older ones, so the same RFC can grid out differently at 45 than at 55.

So sit with the shape of it. Terrence's claim was never really about his diagnosis — it cleared the medical steps and kept moving. It's about what work he can still do, decided by his RFC run through the grids, with the burden on SSA to show suitable work exists. That is the step his claim turns on — and knowing that tells him (and his representative) that the evidence to build hardest is a complete, honest RFC: what he can and can't sustain across a full working day.

Put the whole walk in one line and the black box is gone: Step 1 — not working above SGA, continue; Step 2 — a severe, lasting impairment, continue; Step 3 — not a clear Listing, continue; Step 4 — can't return to past work, continue; Step 5 — the RFC-and-grids question, where it turns. Five questions, in order, each with a knowable answer. Terrence can now narrate his own claim — and so can you.

Now the practical payoff. Because the sequence is fixed, each step has a lesson that zooms all the way in — and finding the step your claim turns on tells you which lesson matters most to you. The map below lays out the whole phase against the five steps.

And here's the interactive version — walk a claim through the five steps yourself. Start with Terrence (his walk stops at Step 5, on purpose), then switch to the three constructed profiles to see the other branches: a claim that ends at Step 1 (working above SGA), one allowed early at Step 3 (meets a Listing), and one denied at Step 4 (can still do past work). It's a teach-back of the flowchart's logic — never a prediction about anyone's real claim.

One honest closing note, because dignity runs through this whole phase. The five steps are a narrow, specific test for one program — they are not a measure of how hard your life is, or of how deserving you are. A claim can clear every medical step and still be decided on vocational grounds; a “not disabled” answer at Step 5 is a statement about available work, not about you. And whatever the answer, it's not final — the appeal ladder (*Lessons 116–118*) exists precisely because the first pass through the flowchart isn't the last word.

Because this fear — *the decision is rigged, I'll never get a fair shake* — is exactly what predators exploit, the two safety fixtures below matter here as much as anywhere in the course. Read them both.

The scam that fits *this* lesson is the “we know how to beat the five-step test” pitch — a fixer or “disability mill” promising, for a fee up front, to game the evaluation or guarantee an approval. It's a lie, and the flowchart is why: the steps are decided on documented medical and work evidence by DDS, under federal rules no outsider controls. No one games them. Applying is free, and a legitimate representative is paid only if you win, out of your back pay, under a federal fee cap (*Lesson 154*) — never a big up-front fee for a “guarantee.”

And if the whole thing still feels out of your hands, sit with the reassurance beat above. The decision feeling arbitrary is near-universal; it being arbitrary is not the case — it's five questions in a row. Knowing which one your claim turns on tells you what to build, a “no” can be appealed, and free help exists that will never charge you to apply. You don't have to face the flowchart alone: SSA at 1-800-772-1213, and free legal-aid offices and disability advocates (*Lessons 153–154*).

• Five-step sequential evaluation — the fixed, in-order set of five questions SSA uses to decide every disability claim (20 CFR 404.1520). It stops at the first step that gives a final answer.
• Substantial Gainful Activity (SGA) — the Step-1 monthly-earnings line; earning above it generally means “not disabled.” 2026: $1,690/month non-blind, $2,830/month blind (deep dive: Lesson 62).
• Severe impairment — at Step 2, a medically-determinable condition that significantly limits basic work activity and meets the 12-month duration requirement. A legal threshold, not a measure of suffering.
• The Listings (the “Blue Book”) — SSA's catalog of impairments considered disabling on the medicine alone. Meet or medically equal one at Step 3 → allowed (Lesson 64).
• Meet or equal a Listing — “meet” = your findings check every box of a Listing's criteria; “equal” = your impairment is at least as severe as a Listing even if it doesn't match every box.
• Residual Functional Capacity (RFC) — “the most you can still do despite your limitations,” across a full workday; built from all your evidence. It drives Steps 4 and 5 (Lesson 63).
• Past relevant work — at Step 4, work you did within the past 5 years that was SGA and lasted long enough to learn (the look-back was shortened from 15 to 5 years in June 2024).
• Any other work in the national economy — at Step 5, work you could adjust to given your RFC, age, education, and skills, that exists in significant numbers. The burden here is on SSA.
• The grids (medical-vocational guidelines) — the tables that combine RFC level, age, education, and skills to direct a Step-5 conclusion of disabled or not disabled (Lesson 63).
• Disability Determination Services (DDS) — the state agency that applies the five steps on your medical evidence (Lesson 60).

That's the map of the whole determination. You can now name the five questions, in order, say which way each answer routes a claim, and point to the single step a given claim turns on — which is exactly the knowledge that tells you what evidence matters most. Next up: Lesson 62 opens Step 1's SGA line in full.