Medical-Vocational Guidelines: How SSA Grid Rules Work

The SSA grid rules are a set of tables the Social Security Administration uses at the final step of a disability claim to decide whether someone who can no longer do their old job can adjust to other work. The tables cross four factors — your physical capacity, age, education, and work history — and each combination points to a directed finding of “disabled” or “not disabled.” Officially called the Medical-Vocational Guidelines, they’re known as the grids because you read them like a spreadsheet: find the row that matches your profile, and the last column gives the answer.

Where the Grids Come Into Your Claim

The SSA works through a five-step sequence on every disability case, and the grids only appear at Step 5. Steps 1 through 4 ask whether you’re working above the substantial gainful activity level ($1,690 per month in 2026),¹ whether you have a severe medical impairment, whether that impairment meets a listed condition, and whether you can still do any work you’ve done in the past.² If you get past Step 4, the case turns on Step 5: can you adjust to other work that exists in the national economy?

Something important shifts at Step 5. For the first four steps, you carry the burden of proof. At Step 5, the burden moves to the SSA — the agency has to show that jobs exist you could actually perform given your limits, age, education, and background. The grid tables are how the agency carries that burden in most cases.

Your Physical Capacity: The RFC Classification

Before the grids can apply, the SSA assesses your residual functional capacity, or RFC — the most you can still do physically despite your impairments. That RFC gets expressed as an exertion level, and the level controls which grid table you fall under.³

Sedentary: lifting no more than 10 pounds at a time, mostly sitting, with occasional walking and standing.
Light: lifting up to 20 pounds at a time, frequent lifting or carrying up to 10 pounds, or considerable walking or standing.
Medium: lifting up to 50 pounds at a time, frequent lifting or carrying up to 25 pounds.
Heavy and very heavy: lifting 100 pounds or more. People still capable of this level almost never qualify under the grids.

Which level you land on matters enormously. The sedentary grid produces far more “disabled” outcomes than the light grid, which in turn produces more than the medium grid. According to the SSA, roughly 200 separate unskilled sedentary occupations exist in the national economy — a much smaller pool than what’s available at higher exertion levels, which is why sedentary claimants have a better path to a favorable rule.⁴

Your Age Bracket

Age is the single most powerful variable in the tables. The older you are, the more the rules tilt toward a disability finding, on the reasoning that adapting to new work gets harder with age.⁵

Younger individual (under 50): the SSA generally assumes age won’t seriously limit your ability to adjust. Almost every rule in this bracket directs “not disabled,” with narrow exceptions for illiterate claimants limited to sedentary work.
Closely approaching advanced age (50–54): the rules become noticeably more favorable, especially at sedentary capacity.
Advanced age (55 and older): the SSA treats age as a significant barrier. Many rules at this level direct “disabled” when education is limited and skills don’t transfer.
Closely approaching retirement age (60 and older): the most favorable treatment, with much tighter transferability standards.

Borderline Age Situations

If you’re within a few months of the next bracket, the SSA won’t apply the categories rigidly. When you’re close to an older category and using that older category would result in a disability finding, the agency will consider whether the higher bracket fits your overall facts better.⁵ This matters most around the jumps at 50 and 55, where grid outcomes commonly flip. If you’re 49 and eight months old with facts that otherwise match a favorable rule in the 50–54 bracket, pressing this issue can decide the claim.

Your Education Level

The SSA slots your education into one of four levels, and the distinctions carry real weight, especially at older ages.⁶

Illiteracy: inability to read or write a simple message such as instructions or an inventory list, regardless of whether you can sign your name. The most favorable education level in the grids.
Marginal education: roughly 6th grade or less.
Limited education: generally 7th through 11th grade.
High school and above: 12th grade or more, which the SSA considers sufficient for semi-skilled through skilled work and usually works against a disability finding.

The grids also separate high school education that provides direct entry into skilled work from education that doesn’t. A diploma alone is treated differently from a diploma paired with a relevant trade certificate, and for older claimants at sedentary capacity that distinction alone can determine the outcome.

Your Work History and the Five-Year Look-Back

The SSA reviews your past work to see whether you picked up skills that could transfer to a different job. Work counts as “past relevant work” only if it was performed within the last five years, lasted long enough for you to learn it, and reached the substantial gainful activity level.⁷ The five-year window took effect June 22, 2024, under SSR 24-2p. Work that started and stopped in fewer than 30 calendar days doesn’t count at all.

The shorter look-back helps many claimants. If you last held a skilled job eight years ago, the SSA no longer treats those skills as transferable at Step 5.⁸

Work falls into three skill categories. Unskilled work needs little or no judgment and can typically be learned within 30 days; it doesn’t build transferable skills.⁹ Semi-skilled and skilled work can produce skills that transfer, but only if the new job uses similar tools, processes, or raw materials and requires the same or lower skill level.

Tighter Transferability Rules for Older Workers

The bar for transferability rises with age. For claimants 55 and older limited to sedentary or light work, the SSA won’t find you capable of adjusting unless you have skills that transfer to other skilled or semi-skilled work, or you recently completed education leading directly to skilled employment.⁹ For claimants 60 and older, skills count as transferable only if the new work is so similar to your previous job that virtually no vocational adjustment is needed. That “highly marketable” standard means the SSA can’t point to a vaguely related occupation and call it a match.¹⁰

Reading a Grid Rule

There are three tables: Table 1 for sedentary work, Table 2 for light work, Table 3 for medium work. Each table contains numbered rules that combine age, education, and work experience to produce a directed finding.¹¹ When your profile matches every criterion in a rule, the adjudicator has no discretion. The rule dictates the outcome.

A concrete example. Under the sedentary grid, a 56-year-old with an 11th-grade education and no transferable skills matches Rule 201.01, which directs “disabled.” Change the education to a high school diploma with no vocational training and the work history to unskilled, and Rule 201.04 still directs “disabled.” Give that same person transferable skilled work experience, and Rule 201.03 flips the outcome to “not disabled.” Whether skills transfer is often the deciding factor for older sedentary claimants.

The light grid is less favorable overall, but still directs disability findings for advanced-age claimants with limited education and unskilled or non-transferable work backgrounds. At the medium level, disability findings become rare — generally reserved for claimants approaching retirement age with marginal education or illiteracy, or those of advanced age with no work experience at all.

If your exact profile doesn’t appear in any rule, the grids can’t direct a finding either way. Adjudicators then use the tables as a framework and weigh the interaction of your vocational factors to reach an individualized decision.

Two Shortcuts That Skip the Grids

Two medical-vocational profiles produce a disability finding without running through the tables at all.¹²

The Worn-Out Worker

If you have no more than a marginal education, spent 35 or more years doing arduous unskilled physical labor, and can no longer perform that work because of a severe impairment, the SSA will find you disabled without requiring proof that you can’t handle lighter work. The regulation’s own example is a 58-year-old miner’s helper with a 4th-grade education and a lifetime of unskilled heavy labor who develops severe arthritis.

Advanced Age With No Work History

If you’re 55 or older, have limited education or less, have no past relevant work experience, and have a severe medically determinable impairment, the SSA will find you disabled. This profile skips the RFC assessment and the tables entirely.

When the Grids Don’t Give a Binding Answer

The grids account for physical exertion limits, but not for mental health conditions, sensory impairments, or environmental restrictions. If you have non-exertional limitations — say, depression that affects concentration, anxiety around others, vision or hearing loss, or an inability to tolerate dust, fumes, or temperature extremes — the grids alone can’t produce a binding result.¹³

In these cases the grids serve as a framework. The adjudicator starts with the grid outcome your physical capacity alone would produce, then asks how much your non-exertional limits shrink the pool of available jobs. This is where vocational experts come in. At a hearing, a vocational expert testifies about specific jobs a person with your combined limitations could do and how many exist nationally. If the expert can’t identify a significant number of suitable positions, that supports a disability finding.

The SSA has said that a substantial loss of ability to meet the basic mental demands of unskilled work — understanding simple instructions, responding to supervision, and handling routine changes — cuts the occupational base enough to justify a disability finding regardless of age, education, or work experience.¹³ A well-documented mental health treatment record is what moves you from “grids as framework” into that favorable territory.

Erosion of the Occupational Base

Even when a grid rule technically applies, extra limitations can eat into the jobs the rule assumes are available. The SSA calls this erosion of the occupational base. A sedentary “not disabled” finding assumes you can perform the full range of sedentary work — all 200 or so unskilled sedentary occupations. But if you also can’t use your dominant hand for fine manipulation, need to alternate between sitting and standing, or miss work frequently for medical appointments, the actual pool shrinks well below that full range.⁴

When erosion is significant enough, the adjudicator has to make an individualized determination rather than rely on the grid rule. In practice this often produces a “disabled” finding even where the rule would have said otherwise, because the remaining job base no longer represents a significant number of positions in the national economy. The SSA hasn’t set a specific numerical threshold for what counts as a significant number, which leaves room to argue that your particular combination of limitations has eroded the base below whatever the adjudicator treats as meaningful.¹⁴

1
Social Security Administration. Substantial Gainful Activity
2
Social Security Administration. 20 CFR 404.1520 – Evaluation of Disability in General
3
Social Security Administration. 20 CFR 404.1567 – Physical Exertion Requirements
4
Social Security Administration. SSR 96-9p – Implications of a Residual Functional Capacity for Less Than a Full Range of Sedentary Work
5
Social Security Administration. 20 CFR 404.1563 – Your Age as a Vocational Factor
6
eCFR. 20 CFR 404.1564 – Your Education as a Vocational Factor
7
Social Security Administration. SSR 24-2p – How We Evaluate Past Relevant Work
8
eCFR. 20 CFR 404.1565 – Your Work Experience as a Vocational Factor
9
Social Security Administration. 20 CFR 404.1568 – Skill Requirements
10
Social Security Administration. AR 99-2(8) – Definition of Highly Marketable Skills
11
Social Security Administration. 20 CFR Part 404 Subpart P Appendix 2 – Medical-Vocational Guidelines
12
eCFR. 20 CFR 404.1562 – Medical-Vocational Profiles Showing an Inability to Make an Adjustment to Other Work
13
Social Security Administration. SSR 85-15 – Capability to Do Other Work — The Medical-Vocational Rules as a Framework for Evaluating Solely Nonexertional Impairments
14
Social Security Administration. 20 CFR 404.1566 – Work Which Exists in the National Economy