# What are the SSA Grid Rules?

The Grid Rules explain why age matters so much in SSDI decisions and why the same medical file can lose at 45 and win at 55.

**Direct answer:** The SSA Grid Rules — formally the Medical-Vocational Guidelines — are tables the Social Security Administration uses to direct disability decisions by combining residual functional capacity, age, education, and past-work skills, with outcomes becoming more favorable at ages 50, 55, and 60.

## Where they live

The Grid Rules are set out in [20 CFR Part 404, Subpart P, Appendix 2](https://www.ssa.gov/OP_Home/cfr20/404/404-app-p02.htm).

## What they combine

Residual Functional Capacity (sedentary, light, medium), age bracket, education level, and whether past work skills transfer to other work.

## Why age matters

Break points at ages 50, 55, and 60 make approval more likely — the SSA presumes older workers cannot easily adjust to new kinds of work.

## Sources
- SSA — Medical-Vocational Guidelines (Grid Rules) — https://www.ssa.gov/OP_Home/cfr20/404/404-app-p02.htm
- SSA — How You Qualify for Disability — https://www.ssa.gov/benefits/disability/qualify.html

## Related questions
- [At what age is it easier to get SSDI?](https://ssdidirectanswers.com/answers/what-age-is-it-easier-to-get-ssdi)
- [What is residual functional capacity?](https://ssdidirectanswers.com/answers/what-is-residual-functional-capacity)
- [How do I know if my condition qualifies for SSDI?](https://ssdidirectanswers.com/answers/how-do-i-know-if-my-condition-qualifies)
## Topics
- SSDI Appeals — https://ssdidirectanswers.com/appeals
- SSA Blue Book — https://ssdidirectanswers.com/blue-book

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